₦airaland Forum

Hyperbranched polyester modified epoxy resin has excellent performances.
Hyperbranched polymer has low viscosity, high functionality, no chain entanglement and good solubility characteristics, provides a new way for epoxy toughening. Modifying the hydroxyl-terminated hyperbranched polyester (AHBP) obtained hyperbranched polyester with carboxyl end group (CHBP), not only has the toughening effect, but also play the role of a curing agent. Using CHBP as flexibilizer and curing agent, study its toughing effect on epoxy/MTHPA (EP/MeTHPA) curing system; CHBP molecular terminal all with carboxyl has the best toughening effect, impact strength achieves 18.5 kJ/m2; when the carboxyl terminal content reaches 40%, the impact strength of the epoxy resin is only 7.8 kJ/m, CHBP has no toughening effect at this time. When CHBP mass fraction is 15%, tensile strength achieves the maximum , 64.86 Mpa; when CHBP mass fraction is 15%, the Tg of the resulting cured epoxy resin is 106 ℃, increased about 6 ℃. Weihai CY Dendrimer Technology Co. Ltd forwards from "Study on carboxyl - terminated hyperbranched polyester modif ied epoxy resin curing systems" Wang Xiaoke, Tian Mi (Chongqing University of Science and Technology, Chongqing 401331) Thermosetting Resin, 2008,3 (23) , 25-28

Excellent performance of electrochemical biosensors based on dendritic polymers.
DNA electrochemical biosensor based on the new dendrimers was characterized and tested by electrochemical impedance, results showed that: 1) The sensor has a good selectivity, can effectively distinguish different sequences of DNA fragment, thus can effectively detect pp38 gene sequences Malik's virus Md11 strains; within 2.0 × 10-11 ~ 1.0 × 10-8 mol • L-1 concentration range, pp38 gene sequence and its concentration of electron transfer resistance values were good linear relationship; 2) the DNA biosensor good stability, simple preparation, quick response, and can effectively identify mismatched gene sequences and detect complementary sequences of the gene, in all areas of disease diagnosis, virology, environmental monitoring, it has practical value. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

High salt rejection nanofiltration membrane prepared by PAMAM.
At same concentration, the higher generation of PAMAM, the more amino to react with trimesoyl chloride to get more crosslinking points, more compact membrane leads to higher salt rejection; by increasing concentration, reaction time, the salt rejection rate was improved, the salt rejection coefficient of NF-NG2-8 membrane of Na2SO４、MgCｌ２、MgSo４ reached 93.0%, 92.3% and 91.4%. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Great fixation performance of dendrimers on quantum dots.
CdSe quantum dots modified by dendrimer with hydrophobically modified end groups may be well dispersed and fixed in chloroform, amino, and hydrophobic segments are necessary to fix the quantum dot, interaction between amino and the quantum dot can play a fixed action, while part of the hydrophobic segment can increase the dispersion stability of the quantum dots in a low polar solvent. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Applications of dendrimer in light-emitting devices, fluorescent chemical sensor.
Most of the traditional organic light-emitting compound has concentration quenching effect, limits its application. Inhibition of concentration quenching effect can be done by doping, chromophore modification,due to weak luminous intensity, poor stability, increased costs, problems can not be solved fundamentally. Dendrimer based nanoparticles have better fluorescence intensity and stability, G1.0, the fluorescence intensity was increased 337 times, G10, increased 2466 times, this greatly improved the application of supramolecular complexes nanoparticles in luminescent devices, fluorescent chemical sensors, cell imaging, biomarkers and other areas. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Excellent performance of dendritic heavy metal removal agents.
High content of heavy metal will damage the soil fertility and affect the flora and fauna. Silica grafted dendrimers was used to treat sewage with chromium, the concentration of chromium ions was decreased from 3.0mg/L to 0.24mg/L, and the process is simple and efficient, so dendrimers have promising application in the heavy metal treatment. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Improved rheological and mechanical properties of dendrimer modified polyester.
The ductility of the polyester was enhanced being extruded together with dendrimer, but no increase in tensile stress; after-condensation of the polyester can improve tensile strength, but no change in ductility; after-condensation of polyester with low proportion of dendritic polymer can significantly improve the tensile stress and ductility of material. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Great property of dendrimers-nickel complex of cyclohexene oxide catalysis.
Dendrimers-nickel complex can well catalyze cyclohexene oxide under solvent-free conditions, the main products were 2 - cyclohexenol, 2 - cyclohexenone, 7 - Miscellaneous oxybis ring [4,1,0] heptane-2 rings - one, and the total selectivity of the three products in the total proportion of the reaction product was above 99%, 2 - cyclohexene selectivity can reach 44 % or more; molecular oxygen which was environmentally friendly was used as oxidant, solvent and reducing agent is not necessary. The catalyst preparation method is simple and it's insoluble in water and common organic solvents, keeps active in water and air, reusable, meets the requirements of green chemistry development. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Excellent adsorption properties of novel cyclodextrin polymer of Zn2+.
Cyclodextrin (CD) is cyclic oligosaccharides connected by a different number of glucose molecules, and a class of good clathrate material. β-CD and dendritic molecules were used to synthesize novel polymer which is insoluble in common solvents, through elemental analysis, Molar ratio of CD and dendrimers was 2:1. The new polymer was used to adsorb Zn2+ in simulate water at pH 5 to 6.5, the initial concentration was 2.45mmol/L, Zn2+ adsorption capacity reached 0.78mmol/g. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Dendrimer-OH / titania composites used as metal chelates.
Dendrimer-OH / titania composites can be used as metal chelates to treat wastewater with metal ions, especially for industrial plating wastewater treatment. Optimum pH value of electroplating wastewater that contain various metal ions was different, Cu2 + and Cr3 + optimum treatment pH value was 7, the metal ion removal rates was 96.6%, 99.9%, and optimum treatment pH value of Ni2+ was 9, removal rate was 99.8%. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Dendrimer can greatly improve properties of reactive dyes.
Reactive dyes was used to treat jute fiber, the results show that dendrimer modified jute fiber tinting strength was increased by 30%, fixing strength increased 21%, and light resistance 90%. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Magnetic dendritic heavy metal removal agent has excellent performance.
Magnetic particles prepared by dendrimers have good magnetic response and suspension property, base material of magnetic particles have complete crystalline structure which could offer more active end groups. This is helpful to increase combination of magnetic dendritic heavy metal removal agent and protein, it can be widely used in material science, medical, biology etc. Its good performance shown in following: 1. High removal efficiency compared with traditional material. 2. Reusability. 3. Concentrated heavy metals, improve its reusability and recycling ratio. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

The excellent properties of dendrimer modified silver bromide nanoparticles in light catalysis.
Dendrimers are used as template to prepare sliver bromide nanoparticles, the sliver bromide are encapsulated in dendrimer, and nanoparticles were narrowly distributed with good stability. By adjusting proportion of Ag+ and dendrimer, silver bromide nanoparticles with different particles size were obtained. The sliver bromide and dendrimer nanocomposites are good at photocatalytic degradation of methyl orange, the smaller size, the better catalytic ability. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Excellent properties of dendrimer in Nano metal ions.
Preparation of size and shape controllable metal clusters is a challenge to Nanomaterial Science.
Dispersed and fine dendritic polymers are used as templates, size, stability, solubility of nano particles are controllable. So dendrimers are appropriate temperate for Nano metal particles due to void space and surface groups. Dendrimers are used as templates and sodium borohydride are used as reducer to react with samarium, particles with average size 4.7 nm±0.5 nm and uniform distribution can be obtained. Generations of dendrimers decide its possibility in reaction as templates, high generation dendrimers are more suitable to be used as template and stabilizer. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Dendrimer varnish composition shows great performance in Automobile painting.
Automobile varnish should be material with better visuality, in order to protect environment, the material is expected to have low VOC, i.e high solid content. But with high content, viscosity of material will be increased to lead worse visuality. Dendrimner can be used as a new kind of hyper functionality adhesive of varnish to prepare painting with high solid content and good appearance. Polyester with low hydroxyl functionality will get soft and thin film, while high ones get hard and thin film. Varnish composition with dendrimer has good properties and solid content is higher than the current material (50%). Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Magnetic dendritic heavy metal removal agent has excellent performance.
Heavy metal ions can be adsorbed and encapsulated by dendrimers with lots of hydroxyl groups, includes Ag+, Cu2+, Zn2+, Fe2+, thus dendrimers or dendritic polymer products can be used to remove heavy metal ions. Magnetic particles and amino terminated particles have good removal ability of heavy metals, if modified by dendrimer, the treat effect will be more excellent. Magnetic water treatment agents with different generations can be adjusted according to pH of various systems. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Effective application of dendrimers in the field of ultra-low pressure reverse osmosis membrane.
Dendrimer-based ultra-low pressure reverse osmosis membrane can effectively retain a variety of salts, such as sodium sulfate, sodium chloride, magnesium sulfate, retention rate reaches 92%, in particular sodium sulphate, up to 98%. The membrane has high flux, and low operating pressure. Water flux can reach 30-40 L • M-2 • h - 1, operating pressure was 0.6MPa. The film has good resistance to chlorine, acid and alkali resistance is little weaker. In addition, the membrane has excellent separation performance for PEG-200, showing its promising application in separation small organic molecules from the water. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Carboxyl terminated dendrimer based aluminum tanning agent without chrome.
As people’s awareness of environmental protection, negative effects of chrome tanning can’t be ignored any more, therefore, the production of little chrome, no chrome tanning agents is more important for industry. Carboxyl terminated dendritic tanning agents overcome aluminum tanning agent disadvantages that not washable, low shrinkage temperature, and have great retanning effect, is a new kind of multi-tanning agent. Dendritic polymers have hyperbranched structures and lots of end groups, can form crosslinks with aluminum and dermomyotome with retanning effect, increasing thick rate was increased by 25.10% than ordinary aluminum tanning agent. While the leather tear strength was improved 12.69% and tensile strength 11.28%, and the specific performance of tanning agents can effectively disperse the fiber bundle, so that leather surface was full soft. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Effective application of dendritic polymers in protective substrates.
In order to prevent metal pipe, pipe connections and pipelines from corroding, mechanical damage caused by friction or degradation due to exposure to the sun, soil, moisture etc, protective coating can be coated. Dendrimer based curable compound is particularly good at providing anti-cathode degumming performance, thus protecting the pipes. When it’s not cured, provides excellent adhesion to substrates. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Application of dendritic demulsifer in oil field.
Dendrimer based new demulsifer has good surface properties and infiltrability, it can quickly reach oil-water interface to replace active substances to form new film; due to special structure of dendritic polymers, molecules of the newly formed films are difficult to approach each other, and weaken Waals forces to lower film strength and promote separation of water and oil. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Dendritic acrylic polyurethane nanocomposite has good performance in coating application.
Mechanical properties, water resistance, solvent resistance of nanocomposite is not ideal due to small functionality of the preparation material conventional linear acrylic polyurethane. Dendritic polymer was used to prepare high functionality acrylic polyurethane systems, obtained acrylic polyurethane/inorganic nanocomposite with high performance, the adhesion reached 0 class, which was enhanced 4 classes than conventional systems, the hardness improved from 2B to 4H, and flexibility was greatly increased, meanwhile, the dendrimer based coating has double bond.
Dosage of inorganic oxide was 1% -5%, added 1 wt% photoinitiator named Runtecure 1103, mixed 15 min without light, coated on glass, dried at 50 ℃ in vacuo, and irradiated with UV light to obtain films. The new film has following properties: gloss, adhesion, hardness, anti-stoning, flexibility, weather resistance, solvent resistance, chemical resistance. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Dendrimer modified magnetic nano-materials as water treatment agent in the oil field.
Using dendrimer with a special structure to coat magnetic iron oxide nano-particles to prepare water treatment agents of PF series of magnetic nano material modified by dendrimer, they have very good degreasing effect. At dosage of 50mg/L, oil removal rate can be up to 89.7%, far higher than 100mg/L Roman Haas with degreasing rate 66.6% .About suspended solids removal, water quality is clear and with no obvious suspended solids after the treatment of dendrimers based water treatment agents, while other agents suspended solids removal rate is low. This shows that the dendrimer-coated iron oxide magnetic nanoparticles greatly improved degreasing effect, not only played high adsorption role of magnetic iron oxide nano but also played bridging effect of dendrimer surface group. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Dendrimer based magnetic nanoparticles in biomedical areas.
Using coprecipitation to prepare double oleic Fe3O4 nanoparticles, first modified MMA in surface of magnetic nanoparticles and then modified with GMA, modified dendrimers by generation. The large number of amino groups and fluorescein isothiocyanate (FITC) combine to form a fluorescent magnetic beads with fluorescent, magnetic, multi-drug delivery characteristic. Dendrimer carried drug reaches the specified position by applying a magnetic field, to achieve the purpose of targeted drug delivery, the drug can be tracked as of the fluorescence. Dendrimer surface grafted variety of functional groups can be applied to different areas. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Dendritic polymers products are widely used in the agriculture field.
Currently, commercially available insecticides, herbicides, fungicides or plant hormones, agricultural preparations have the following disadvantages: decreased activity of the active ingredient, low surface energy, small void space, light degradation, and high cost etc. Dendrimers due to structural characteristics have absolute advantages compared with traditional products in this area: (1) thermal stability (2) longer activity time of the active ingredient (3) low-release effect (4) increase solubility (5) improve adhesion and permeability (6) improve permeability (7) reduce the adhesion of soil to make the active ingredient get the plant roots or soil to play the effect ( avoid being affected by UV rays. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Effective application of dendrimers in the biomedical field.
Magnetic nanoparticles modified by dendrimer terminated with amino groups can increase the loading capacity and stability of the Streptavidin-biotin, thereby improving affinity to biotin in the biomedical applications. Compared with unmodified magnetic nanoparticles, its SA adsorption performance was improved, and the adsorption performance increases with the generation enhances. In addition, nanoparticles modified by dendrimer has a good affinity to biotin, affinity to biotin of G5 dendrimer modified particles than the unmodified magnetic particles are increased 6.15 times. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Excellent performance of dendrimer-based magnetic nanoparticles in the heavy metal recycling.
The dendrimer combined with magnetic nanoparticles has integrated both their advantages,can prepare efficient adsorbent for heavy metal ions, and achieve the analytical recovery of heavy metal ions without membrane material. Dendrimer can be recycled 10 times. Dendrimer modified magnetic nanoparticles has good dispersion with uniform particle size. Metal ion removal rate of the magnetic nanoparticles is about 30%, while the dendritic polymer-modified magnetic metal particles have better adsorption capacity up to 80%, which is 2.5 times more than unmodified one. pH affects adsorption of heavy metal ions, best performance is at pH 7, the adsorption rate was 10% at pH 4. Adjusting the pH can achieve recovery of heavy metals ion and magnetic particles. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Magnetic nano catalyst modified by dendrimer has excellent performance.
Magnetic nano catalyst modified by dendrimer has excellent performance: 1. better stability 2. better solubility, can be dissolved in many organic solvents 3. higher catalytic activity 4. higher catalytic selectivity. In a variety of organic solvents, it can catalyze a variety of substance in the hydroformylation reaction, such as catalytic styrene, 4 - fluoro-styrene, bromostyrene, etc., in appropriate conditions, conversion rate can reach 100%, the performance of selectivity reaches 98%, in addition, magnetic nanoparticle catalysts modified by dendrimer, can be recycled to reuse, after recycled five times it can still maintain excellent catalytic activity. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

Effective application of dendrimer-based magnetic nanoparticles in the biomedical fields. Magnetic nanoparticles modified by dendrimer have a large number of amino functional groups on surface, thus obtained modified magnetic microspheres with magnetic particles as core, it can coupling bovine serum albumin with a good fixing ability, the fixed number of proteins is 7.7 times than the simple use of an aminosilane-modified magnetic nanoparticles, can be used for separation of proteins or other applications. Weihai CY Dendrimer Technology Co., Ltd.-Professional Manufacturer for low cost dendritic polymers. -The newest 4th class polymers.

1. Modified hyperbranched polyester has promising application in paint film,coating field.
After using caprolactone and lauric acid to modify hyperbranched polyester, the film properties in gloss, impact resistance, adhesion and flexibility is very excellent. Caprolactone and lauric acid-modifiedhyperbranched polyester has the best performance, lowest viscosity of 7500 mPa • s, the coating is dry in 40 minutes, and the hardness is F. Seperately using caprolactone or lauric acid modifiedHBP-1 and HBP-2, the corresponding data are 7 × 105 mPa • s, 20 minutes, HB, and 17500mPa • of s, 90 minutes and 2B. In addition, coating with lauric acid and benzoic acid-modified hyperbranched polyester in adhesion, hardness and is greatly improved, and increasing the amount of benzoic acid can improve the pendulum hardness. Weihai CY Dendrimer Technology Co.,Ltd forwards from Yong Wang, Yanan Zhu, Qu Jniqing Polymer Materials Science and Engineering, 2013, 3 (29):14-21; And Chemical Industry and Engineering (1.South China University of Chemistry and Chemical Engineering, 2. Garbo Li Chemical Industry Group Co., Ltd.)

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.

4. 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.