文献类型：期刊文献

英文题名：Supramolecular self-assembly of a polyelectrolyte chain based on step-growth polymerization of hydrophobic and hydrophilic monomers

作者：Sun, Li[1,2];Ma, Shang[1];Wang, Chen[1];Chi, Yongmei[1,2];Dong, Jian[1,2]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China

年份：2017

卷号：7

期号：83

起止页码：52832

外文期刊名：RSC ADVANCES

收录：SCI-EXPANDED(收录号：WOS:000415349700053)、、EI(收录号：20174704443004)、Scopus(收录号：2-s2.0-85034575022)、WOS

基金：This work was supported by the National Natural Science Foundation of China (21674063, 21202102 and 20974063) and Natural Science Foundation of Zhejiang Province (No. LY12E03001). All calculations in this study were performed at Shenzhen Supercomputer Center.

语种：英文

外文关键词：Crosslinking - Cyclohexane - Gel permeation chromatography - Hydrogen bonds - Hydrophilicity - Hydrophobicity - Metal nanoparticles - Monomers - Nuclear magnetic resonance spectroscopy - Polyelectrolytes - Polymerization - Quantum chemistry

外文摘要：A novel amphiphilic polyelectrolyte (APE) prepared by step growth polymerization of hydrophobic and hydrophilic monomers is shown to have self-assembly structures. The polymerization reaction between citric acid and hexamethylene diisocyanate led to poly(hexamethylene citramide imide) (PHMCI), which was characterized by two-dimensional NMR, vibrational spectroscopies and gel permeation chromatography. Hydrolysis of PHMCI through a ring opening reaction resulted in a polyelectrolyte, poly(hexamethylene citramide) (PHMC) with three key elements of self-organization, i.e., ionizable side chains, hydrophobic groups and hydrogen bonding. PHMC is able to self-assemble to nanoparticles in water with variable hydrodynamic diameters and surface structures. The presence of noncovalent cross-linking of cooperative H-bonding units facilitates the formation of the polymer nanoparticles. The cooperative H-bonding is maintained from pH 5.5 to 10.0, which is verified by quantum chemical calculations. The nanoparticles are highly efficient metal chelators, offering potential as new remedies for metal sequestration in water or soil.