₦airaland Forum

Dendritic metallic nanostructures for fuel cell have good performance
Fuel cells are new energy conversion technology used in portable electronic devices, stationary power generation and automotive applications, wherein the polymer electrolyte membrane (PEM) fuel cells than conventional fuel battery have the following advantages: flexibility in operating conditions, can quickly change the output power, durable, simple system, so it is the first choice of the car for the power source. The results showed that under the conditions of the PEM fuel cell, the tree platinum sheet than the conventional platinum catalyst has much higher catalytic activity and durability. Under 75 hours at 0.5v, during the test period of constant electric potential use, the performance of platinum black decreased by 47%, while the performance of platinum sheet fell only 33%. More importantly, in the durability test, at 75 hours of operation test, it only declined 19% (1.2A/cm2 to 0.97A/cm2), meanwhile platinum black MEA dropped 43% (1.25A / cm2 to 0.71A/cm2). Dendrimers (CYD-ND193/CYD-ND311/CYD-ND537) have broad application prospects at platinum catalyst for fuel cell due to the durability. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Dendrimers as thermoplastic toughening agents have great performance.
Dendrimers (CYD-PR121/CYD-PR256/CYD-PV121/CYD-PV256) as toughening agents for thermosetting material (bismaleimide BMI) have the following advantages: low viscosity, can reduce the processing viscosity of BMI system, ease of processing, more easily compatible with BMI. Methods: Acetylating its active end group by modification, to avoid its reaction with BMI system. BMI + HBP dissolved in allyl phenol solvent, and then stirred and heated to 145 ℃, the clear homogeneous solution was prepared, degassed and added to the preheated mold to solidify, 150 ° C (5 h), 200 ° C (3 h), 250 ° C (3 h). When the dosage of dendrimer is 9%, elongation at break can reach the maximum of 138%, toughening performance was increased by 15.9% compared with linear polyesters, meanwhile, system without dendritic polymers as toughening agent, the elongation at break could not be determined, thus no toughness. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Dendrimers can significantly improve the mechanical property of epoxy system.
A small amount of hydroxyl groups of dendrimer (CYD-CR111/CYD-CR236/CYD-CV111/CYD-CV486) react with epoxy curing system to form a three dimensional network structure. Blending with the epoxy system by a simple physical method, due to the special structure of the molecule as well as physical interactions with epoxy matrix, it can significantly improve the mechanical properties of epoxy systems. (1) at low temperature (77 K) hydroxy terminated dendrimers can improve the tensile strength and impact strength of epoxy resins, with mass fraction of 10% of hydroxy-terminated dendrimer, compared to the pure epoxy resin system, the tensile strength increased from the original 98.2MPa to 115.6MPa, increased by 17.7%; failure strain increased with the amount increased of dendrimer, when dosage is 10%, increased from the original 1.9% to 3.1%, increased by 63.2%. (2) the impact strength increased from 25.4 ± 2.7 to 32.0 ± 1.0, increased by 26.0%, and after adding the dendrimer, impact strength at low temperatures is not lower than room temperature, and appropriate dosage of hydroxyl terminated dendrimers does not lower Tg of condensate. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Dendrimer-based glyphosate has better performance
Dendrimer-based novel formulations of glyphosate has better pesticide effect than commercially available glyphosate, the advantage is to improve the solubility, increase dispersion, protect active substances, increase adhesion and so on. Even under adverse conditions are valid, such as under rainfall conditions, efficacy is still improved by 150% -250%. Nufarm and Starpharma cooperated together to do R & D, produce dendrimer-based substrate to increase or decrease the flow of insecticide penetration-imidacloprid-underground insects, efficient dendrimer-based crop protection products have become the R & D focus of international pesticide manufacturers, and there are always new international patent applications generated. Weihai CY Dendrimer Technology Co. Ltd as the first company in Asia to R&D and produce dendrimers, we have provided many dendrimer products to Peking University, Tsinghua University and Chinese Academy of Sciences, etc. for scientific experiments, and now we have already realized the industrialization of dendrimers. Welcome to the manufacturers of pesticides and other agricultural products to use our dendrimers in efficient crops product development and production to improve performance. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

CT contrast agents based on dendrimer/gold nanoparticles have superior properties.
Now commercially available CT contrast agents are iodine based, faults as following (1) short circulation time in vivo (2) potential toxicity to kidney. Dendrimer （CYD-MD1384/CYD-MK4514/CYD-MD2524/CYD-MK5654 etc.）based CT contrast agents has following advantages (1) gold shows higher X-ray attenuation coefficient, is more conductive to provide high quality CT effect.(2) Gold nanoparticles can be give targeting property and prolong circulation time due to its easy modified surface（3）gold nanoparticles prepared by dendrimer have good dispersion and biocompatibility property, and are also environment friendly.Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Cosmetics with dendrimers have superior performances.
Compared with conventional cosmetics, hydroxyl functional groups terminated dendrimer (CYD-CR111/CYD-CR236/CYD-CR486/CYD-CV11 etc.) as a cosmetic film-forming agent, can make cosmetic easy to uniformly spread on the skin, softening the skin, increase the adhesion, prevent the makeup off the skin and play cleaning effect, so it is a good cosmetic additive. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

UV curable film performance of branched polyurethane acrylate
Dendrimers (CYD-CR111/CYD-CR236/CYD-CR486/CYD-CV11 etc.)have low viscosity and good adhesion, used in light curable acrylic polyurethane coatings formulations, their performance is complementary , thereby making coating performance more excellent. System with dendrimer has high functionality, cured film network has large crosslinking density and the film has high hardness, compared to unmodified polyurethane system, it has better coordination of the hardness and flexibility, therefore have better wear resistance, hardness increased 0.8 times, wear resistance increases 1.7 times. In addition, the dendrimer modified acrylic polyurethane UV coating, can be blended with a variety of active monomer to improve overall performance, while not affect its own flexibility and adhesion. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Starlike dendritic polymers modified acrylate resin coatings have good performances.
Water-based acrylate resin coatings use water as medium, it’s an environment friendly coatings as VOC is little. The disadvantage is the high surface tension of water, it results in poor leveling property, slow drying, sagging, craterring,low gloss etc. Because of bad water resistance,
it hasn’t been used in automatic coatings. Dendrimers (CYD-CR111/CYD-CR236/CYD-CR486/CYD-CV11etc.) can offer more active crosslinking point to lower viscosity of coatings and increase leveling property and crosslinking density, thus getting curing film with better over-all properties.Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Excellent properties of organic light emitting device with dendrimer.
Advantages of OLED1)light weight (2) easy operation with simple elements (3) good imagine quality, high color purity and dynamic image(4) low power consumption. The most important fault of OLED is the short life span, but life span increased by 100% if use dendrimer (CYD-MD1384/CYD-MK4514/CYD-MD2524/CYD-MK5654 etc.) in the production, driven voltage is 1V less than the compared samples and lighting efficiency increased by 46%. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Excellent performances of dendrimers for the controlled release fertilizers
The main problem of controlled release fertilizer on the market is that the brittleness increased after sulfur solidification, causing sulfur coated controlled release fertilizer seriously unshell. In existing production processes, coat the outer membrane of sulfur with thermosetting resin, microcrystalline wax or epoxy eased the problem, but there are still shelling phenomenon, affecting the release fertilizer effect. Dendritic polymer (CYD-CR236/CYD-CR486/CYD-CV236/CYD-CV486) used as toughening agent has very distinct advantages: 1) the effect is obvious, the impact strength and tensile strength were increased by 512% and 187%, and didn’t lower the glass transition temperature and elastic modulus, to achieve toughening effect; 2) this kind of toughener can serve to strengthen the membrane material sealing effect, to avoid spraying sealant, thereby reducing coating steps; 3) process is simple, suitable for current existing sulfur coated device, without any additional equipment. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Dendrimers have superior performances as a new class of toughener.
Using a certain dosage of dendrimers(CYD-CD215/CYD-CR111/CYD-CV111) to modify epoxy resin, while improving the toughness, the strength remained unchanged.When dendrimer dosage is 16%, bending performance reaches maximum, bending strength improved from 55. 37 MPa to 60. 32MPa, bending modulus improved from 3544. 89 MPa to 3758. 32MPa, meanwhile impact strength reaches maximum, from 3. 10 kJ /m2 to 4. 64 kJ /m2, improved almost 50%. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Double-curable dendrimers have excellent coating performance.
Using glycidyl methacrylate (GMA) andγ-aminopropyl triethoxy silane to modify dendrimer(CYD-CD333), thereby the external form alternating structure with dual curing capabilities, i.e. the moisture curing and UV curing. Advantages of coating application: 1)good hardness; 2) improve the adhesion; 3) flexibility and impact resistance increased; 4) fast curing speed; 5)better thermal stability and thermal degradation ; 6) greatly enhanced heat resistance.Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Dendrimers can improve application performances of materials
Dendrimers (CYD-CD215/CYD-CD151) can be immobilized onto gold, silica, quartz and other polymeric materials by physical or chemical method to improve application performance of materials that is applied to optical materials, sensors, etc., such as being immobilized onto the PP substrate to improve the material resistant to air permeability, adhesion, fluoride etc., resistance to air permeability can be increased by 16.6 times, and has good adhesion performance, can withstand force by 20N /cm2 . Conversely,adding dendrimers to coatings or other materials to improve adhesion property on gold, silica, or other materials. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

PAMAM as gene carrier to enhance transfer efficiency.
PAMAM with DNA can form stable compound, the complex entered by cellular endocytosis into the cell, DNA fight against lysosomal degradation, PAMAM internal multistage amine has good buffer capacity to protect the DNA, and released DNA under the acid conditions to achieve the purpose of transfer. Amidization is easy, by controlling the amount of octadecadienoic acid chloride, grafting it with dendrimer to form the external hydrophobic and internal hydrophilic dendrimer, it can well combinate with DNA in gene transfer process, thereby improving the efficiency of gene transfer. Professional Manufacturer for low cost dendritic polymers.-Weihai CY Dendrimer Technology Co. Ltd. forwards from "Preparation and Transfer Efficiency of Modified PAMAM Dendrimer Gene Delivery" Liu Junan, Wei Xiaolei, Jiang Hong, Zhong Wenzhong, College of Science,Huazhong Agricultural University, Wuhan 430070,China;Hubei Nanxing Chemical General Facory,Zhijiang 43200,China.

Applicatioin of dendrimer-based multi-block complex depressurizing and stimulation agent for ultra-low permeability oilfield
Currently used chemical depressurizing and stimulation methods including: conventional acidifying, retarder acidifying, surfactant injection, shrink swelling agent injection, thermochemical technologies injection system. Dendrimer-based multi-block complex depressurizing and stimulation agent for ultra-low permeability oilfield can effectively solve disadvantages of traditional agent in application of ultra-low permeability oilfield. (1) acid-rock reaction speed is too fast, the penetration distance is short, resulting in ineffective acidification and short period of measures .(2)Surfactant adsorption capacity is big in the near-well place, thus does not reach far wellbore, reducing the effect of the active agent. (3) The injected chemicals is not compatible with the formation fluid and produced new precipitate, resulting in decreased permeability. Professional Manufacturer for low cost dendritic polymers.-Weihai CY Dendrimer Technology Co. Ltd. forwards from “Multi-block complex depressurizing and stimulation agent for ultra-low permeability oilfield’’, application number: 201210200334.4 Application (patent) by: Yangtze University address: 434020 Hubei Jingzhou South Loop on the 1st applicant: China PetroChina Changqing Oilfield Company ultra-low permeability reservoir research center inventor: Luo Yue, Chang Yanrong, Yang Huan, Shao Dong bo, Zhang Jianguo etal.

Dendrimers can well improve the hydrophilicity of carbon fiber to further solve the limitations of its application
Amino terminated dendrimers can well improve the hydrophilicity of carbon fiber, to further solve the limitations of its application. PAMAM modified carbon fibers can increase the wettability of the surface of carbon fibers, thereby increasing the affinity with the polymer matrix, for example combination with epoxy resin, compared with unmodified carbon fibers, its interfacial shear strength increased by 85 %. Weihai CY Dendrimer Technology Co. Ltd forwards from “Interfacial enhancement of carbon fiber composites by poly(amido amine) functionalization” Qingyu Peng , Yibin Li , Xiaodong He , Hongzhen Lv , Pingan Hu , Yuanyuan Shang , Chao Wang, Rongguo Wanga, Thirumany Sritharanc, Shanyi Du Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, PR China b Research Centre for Micro/Nanotechnology, Harbin Institute of Technology, Harbin 150080, PR China C School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore Composites Science and Technology 74 (2013) 37–42.

Effective application of dendrimer in carbon dioxide catalytic reactions.
(1) through "divergent synthetic method," using KH550 to modify amino groups of silica and react with acrylate, diamines series, then obtain silica with PAMAM on the surface; (2) the synthetic silica with branch phosphine composes catalyst system with RuCl3, to verify the catalytic activity in the catalytic hydrogenation reaction of carbon dioxide, the catalytic activity of 1-4G increased with the increase of generation, the activity of 4G reaches maximum(TOF: 4195) ,5-6G activity decreases. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers forwards from "Preparation and application of silica/magnetic supported branch phosphine in catalytic reaction of carbon dioxid" Su Yajun, Hebei University of Technology 2009 in May

Effective application of Hyperbranched polymer in plastic (PA and HDPE) processing
(1) hyperbranched polymer had no significant effect on the HDPE melt temperature and the crystal , crystallization temperature and the crystallinity increased slightly; (2) hyperbranched polymer can improve the HDPE melt flow, HDPE / HBP blends remains pseudoplastic fluid, it can reduce the melt complex viscosity, injection molding experiments show that hyperbranched polymers can significantly reduce the HDPE injection molding processing temperature, thus improving its processing performance and reduce energy consumption; (3) hyperbranched polymer can improve HDPE extrusion melt fracture, improve extrusion surface smoothness; (4) hyperbranched polymer in HDPE can be 150-250nm scale dispersion, though are not up to the molecular level dispersion, but making HDPE tensile strength increased, when dosage is 0.18% , it can be improved by 26.16%. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers forwards from "Research on hyperbranched polymers application in the plastic (PA and HDPE) Processing " Zhang Xiong, Donghua University, 2007 Master Thesis

Dendritic polymers can greatly improve PP/ PVC performance.
(1) the dosage of PP-HBP is 5 units, PP / PVC / PP-H BP blending system tensile strength and impact strength reaches the maximum, respectively increase 18.03% and 28.2%; (2) PP-HBP improve PP/PVC compatibility of blends; (3) when PP-HBP dosage less than 5 units, PP/PVC/ PPHBP apparent viscosity of the blends is larger than PP / PVC blends; when PP-HBP dosage more than 5 units, PP/PVC/PP-HBP the apparent viscosity of blends is smaller than PP/PVC blends; (4) blends meet the free volume theory of polymer melt flow. With temperature increasing, the apparent viscosity of the blend decreases. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers forwards from "PP / PVC / PP-HBP blends research" Diao JIANZHI BA Xin Wu Ding Haitao Li Chunzai Hebei University, Modern Plastics Processing and Applications 20 2005 No. 17 No. 3; "PP-HBP-modified PP / PVC rheological behavior," Diao Jian-zhi 1, SONG Xiao 2, Zhang Jianmin 1, Peng Cheng-11: Shijiazhuang Railway Institute, 2: Hebei electric Power Research Institute of Modern plastics Processing and Applications 2006 18 volume No. 2

2.With hyperbranched polyester coating can cure at 70 ℃ low temperature.
Double bond modified hyperbranched polyester can overcome the defect that general powder coating cure at 120 , it can achieve about 70 ℃ low temperature curing, thereby expanding the application of powder coatings, it is not limited to metal substrate, the heat-sensitive substrate (such as wood, plastic, etc.) applications, it has fast curing rate at low-temperature, high conversion rate, curing enthalpy is 70KJ/mol, compared to the curing enthalpy of methacrylic acid 57KJ/mol, it has obvious application advantages.Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers forwards from "Novel Concept for Low Temperature Curing Powder Coatings Based on Hyperbranched Polyesters" Mats Johansson, Eva MalmstrOm, Andreas Jansson, and Anders Hultt - Royal Institute of Technology Technical Articles, Vol. 72, No. 906, July 2000

Hyperbranched polyester as toughening agent of epoxy resin systems has good performance
Non-reactive hydroxyl-terminated hyperbranched polyesters can be used as toughening agent of epoxy resin system (bisphenol A epoxy resin) , which in the form of monodisperse particles disperse in epoxy matrix, play a toughening effect. When the dosage is 10%, it can obviously improve the impact resistance properties and is 2 times than without it. Hyperbranched polyesters in the form of particles disperse in the epoxy systems can reduce crack and play an enhanced effect. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers forwards from "Thermomechanical properties and morphology of blends of a hydeoxy-functionalized polymer and epoxy resin" D.Ratna GPSimon Department of materials engineering manash university, clayton , vic, 3800, Australia Polmer, 2001.42, 8833-8839

PAMAM Dendrimer Nanocomposites catalyst has a good application prospect.
PAMAM dendrimers can be prepared as a template with good dispersion, high stability, uniform size and controllable quantum dots, solubility of quantum dots in organic or inorganic solvent can be adjusted through the terminal functional group modification to make it used as quasi-homogeneous catalysts. It can fully contact with the reactants to increase the catalytic efficiency and is heterogeneous catalyst which is easy to separate. Furthermore, active surface groups of PAMAM make the quantum dots attached to the carrier, which can enhance the re-use and recycling performance of the catalyst. Thus, the quantum dot/PAMAM Nanocomposites catalyst has good application prospects. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers, forwards from "Effect of Polymer Templates on the Preparation and Photocatalytic Activity of CdS Quantum Dots" Cong Rimin*,1,2 Luo Yunjun*,2Yu Huaiqing1 (1 College of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081) (2 College of Material Science and Engineering, Shandong University of Technology, Zibo 255049) Chimica Sinica Vol. 68, 2010, No.19, 1971 ~ 1976

Effective application of PAMAM in papermaking wastewater treatment.
Using polyamidoamine (PAMAM) on the papermaking wastewater by flocculation treatment, the results show that, PAMAM dendrimers for papermaking wastewater has excellent flocculation effect.When pH is around 3.0, PAMAM dosage is 50mgL , the SS and COD Cr removal rate can reach 91% and 89.4%. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers, forwards from "A study on the application of polyamidoamine dendrimer in the treatment of paper mill effluent " Shen Yi, Zhang Guanghua, Zhu Xuedan (key Laboratory of additives Chemistry&technology for chemical light industry, Ministry of Education, Shaanxi University of Science&Technology, Xi'an 710021,China)

PAMAM labeled antibodies for in vitro testing
PAMAM dendritic polymers can bind with antibody, combining with the conventional ELISA methods, it can be used for the in vitro detection of TAFI levels, opening up a new method of in vitro TAFI diagnostics to improve the detection sensitivity. TAFI levels in vitro test kit contains a monoclonal antibody specific for the TAFI and enzyme-linked immunoassay reagents required, and according to the biological characteristics of PAMAM with amino end groups, using PAMAM labeled antibody method for detecting human biological samples content of TAFI in vitro test, which solves the existing disadvantages of expensive device technology and long defect detection time. For clinical predictors of cardiovascular disease, making it simple, fast, low cost, diagnostic sensitivity, low detection limit. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers, forwards from "TAFI levels in vitro detection kit" Applicant: Liaoning Wandi Biotechnology Co., Ltd. Inventors: LI Wenxin

Hyperbranched polyester is widely used in the field of coatings.
Hyperbranched polyesters can be widely used in coatings, either as direct additives, curing agent or as a coating material, have shown superior property compared with conventional additives . Hyperbranched polyester with double bonds nidified in the UV-curable coatings has outstanding performance. Such as for flexible material, showing excellent resistance to oxygen permeability, the PET and PP were increased resistance to oxygen permeability of 2.3 times and 15 times, in addition, it conglutinates well with the PET and PP packaging substrate. It has promising applications prospects.Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers, forwards from Barrier coating for flexible packaging based on hyperbranched resins Lange, E Stenroos, M Johansson Department of polymer technology, Royal Institute of Technology,S-100 44 Stockholm Sweden Polymer,2001,42,7403-7410

Hyperbranched polyester applications in coating industry
(1) Epoxy resin curing agent.
Hyperbranched polyester has a large number of active end groups, amino groups and carboxyl groups can react with epoxy groups.
Applicable products:
Hyperbranched polymer with amino groups,carboxyl groups,such as PAMAM and modified hyperbranched polyester.
Examples 1:

Carboxyl-terminated dendrimer as curing agent by reaction of a carboxyl group with an epoxy group of the epoxy fixed on the three-dimensional network structure, along with appropriate increase of the mass fraction resulting cured crosslink density increases, by the action of stretched force, the three-dimensional network structure of the epoxy resin can maintain its rigidity, can withstand greater tensile force, making the tensile strength increases. As shown, the tensile properties test due to GB/T-2568-1995, temperature (23±2) ℃, rate of extension 2mm/min, when add modified hyperbranched polyester CYD-220T mass fraction of 15 %, the tensile strength reaches the maximum 64.86 MPa, is 3 times than the system without adding it.

Example 2:

Using dendrimers with amino terminal group as the epoxy resin curing agent, adding the theoretical amount and without diluent, at 20 ℃, usage time and gel time of such coatings are 6.0 and 2.4 times than ethylenediamine/epoxy System. And curing at 95 ℃, 120 ℃, 150 ℃, curing speed are 1.8 times, 3.4 times and 4.8 times than ethylenediamine/epoxy resin system.

(2)Epoxy resin additives

Principle:
Non-reactive end groups of the hyperbranched polymer does not react with the epoxy resin, curing agent, or the reaction activity is low. In epoxy curing system, the cured is modified by physical blending.
Applicable products:
Hyperbranched polyester series.
Application examples:
Hydroxyl-terminated hyperbranched polyester can improve the tensile strength and impact strength of epoxy resin, adding the hydroxyl-terminated hyperbranched polyester of 10% mass fraction, the tensile strength and impact strength were increased by 17.7% and 26.3%, and after adding hyperbranched polyester, impact strength at low temperature is not lower than room temperature.

(3) Hyperbranched epoxy resin.
Epoxy-modified hyperbranched polyester can significantly improve the toughness of the epoxy resin coating, the impact resistance, along with the amount increase of the hyperbranched polyester, the impact resistance increases, while the dosage is 15%, the impact resistance is 296% of the original one and the rate of curing, mechanical strength of the original epoxy resin matrix are not affected, which is attributed to plasticizing properties of hyperbranched polyester and particulate structure in epoxy resin phase. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

PAMAM dendrimer modified silica particles has great application value in water purification
Silica particles modified by pamam can effectively adsorb anionic dyes and surfactant in the water, in particular C18G1S showed the highest binding affinity to the anionic surfactant. The adsorption isothermal studies indicated that adsorption of surfactants on C18GnS was due to the assistance of hydrophobic interaction between the aliphatic peripherals on the dendron and the
alkyl tail on the surfactant. The anionic targets adsorbed on the surface modified silica particles can be released at alkaline condition because of the deprotonation of PAMAM dendron, which suggests the convenient recovery and reuse process. Counting in the cost efficiency and environmental low load, as-prepared amphiphilic dendron-modified silica is a promising solid phase adsorbent for water purification. Weihai CY Dendrimer Technology Co. Ltd forwards from “Solid-Phase Synthesis of Amphiphilic Dendron-Surface-Modified Silica Particles and Their Application Toward Water Purification”Chih-Chien Chu,† Norio Ueno,‡ and Toyoko Imae*,† Graduate School of Science and Technology, Keio UniVersity, Hiyoshi, Kohuku-ku, Yokohama 223-8522, Japan, and Material Science Research Center, Shiseido Co. Ltd., Hayabuchi, Tsuzuki-Ku, Yokohama 224-8558, Japan ReceiVed August 24, 2007. ReVised Manuscript ReceiVed December 7, 2007

Dendrimers have good and promising applications in oil wastewater treatment
Dendrimers have good and promising applications in oil wastewater treatment. Dendrimers (PAMAM, CYD) modified with magnetic nanoparticles can be used for almost all kinds of oil wastewater, and show excellent performence of watertreatment, which is far better than traditional pharmaceutical. Oil removal rate can reach 97.4%, after 70mg/L PAMAM-F3O4 is added, and the suspension can be reduced from 137mg/L to 55mg/L.