₦airaland Forum

The effective application of efficient reverse demulsifier stellate polyquaternium
Using organic amines such as secondary amines and tertiary amines polymerize propylene oxide ring-opening to get linear polyquaternium, using PAMAM as a crosslinking agent then obtained
stellate polyquaternium reverse demulsifier. Its advantages are mild reaction conditions, readily available raw materials, unique structure of products, is cationic organic macromolecule, and has a
charge neutralization, replacement, adsorption, bridging performance, add 5 ~ 30ppm can effectively remove oil,suspended solids and other pollutants from the oily sewage , effectively reduce the oil content ,color, COD and other indicators in treatment sewage.The stellate polyquaternium efficient reverse demulsifier respectively, in Huabei Oilfield, Liaohe Oilfield, Daqing Oilfield carried out using the evaluation and achieved good effect. Weihai CY Dendrimer Technology Co.,Ltd fowards from "One method for preparing efficient stellate polyquaternium reverse demulsifier" Patent No.: 200810115284.3 Applicant: China National Offshore Oil Corporation co-applicants: Tianjin Chemical Research and Design Institute invention person: Sufen Wang, Guangyuan Yao,Bei Lin, Jiajun Li, Houkai Teng,Shuzhong Zheng.

Dendrimer modified MWCNTs has excellent performances
Owing to their unique optical, electrical, magneticand mechanical properties, carbon nanotubes (CNTs) have attracted worldwide attention in the fields of nanoscience, nanotechnology, and bioengineering. However, now multi-walled carbon nanotubes in polymer composites is limited by its polymerization tendency and poor dispersion. Using polyamido - amine dendrimer modified multi-walled carbon nanotubes (MWCNTs), prepared a dendrimer / carbon nanotubes (MWCNTs-g-PAMAM) nano composites. In polar solvent such as water, methanol and ethanol, the composite material has good dispersibility. Infrared spectra showed that the graft-modification is covalent bonding of MWCNTs and PAMAM, thermal gravimetric analysis data indicate that PAMAM successfully modified on MWCNTs sidewalls, and grafted onto MWCNTs. The amount of PAMAM varies with their generation (G1.0 ~ G4.0) , the specific order is G2.0> G1.0 ≈ G3.0> G4.0. Weihai CY Dendrimer Technology Co. Ltd. forwards from "Modification of Multi-walled Carbon Nanotubes with Poly(amidoamine) Dendrimers via "Grafting to" Method" Yuan Kun, Zhu Yuancheng Liu Yanzhi, Liu Xinwen, Tang Huian, Zuo Guofang, Zhang Junyan, Tianshui College of Life Science and Chemistry, Tianshui 741001 Lanzhou Institute of Chemical Physics, national Laboratory of solid Lubrication, Lanzhou inorganic Chemistry Vol 25 No. 6 June 2009