CAJ | 학술논문

在氯化锂/N,N-二甲基乙酰胺( LiCl/DMAc)体系中,利用2-溴代异丁酰溴与纤维素的直接酯化反应首先合成了具有不同引发点数量的ATRP大分子引发剂( cell-Br)；然后以CuBr/PMDETA为催化体系,cell-Br为引发剂,将2-甲基丙烯酸羟乙酯通过原子转移自由基聚合ATRP法接枝到纤维素的大分子骨架上合成纤维素-甲基丙烯酸羟乙酯接枝共聚物( cellulose-g-PHEMA)。通过FT-IR,1H NMR,GPC和 TGA对cell-Br和cellulose-g-PHEMA的结构和性能进行分析,并利用动态光散射( DLS ),原子力显微镜( AFM ),透射电镜( TEM )观察了 cellulose-g-PHEMA 的微观形貌,结果表明cellulose-g-PHEMA易于组装成直径约180 nm的球形胶束。
재록화리/N,N-이갑기을선알( LiCl/DMAc)체계중,이용2-추대이정선추여섬유소적직접지화반응수선합성료구유불동인발점수량적ATRP대분자인발제( cell-Br)；연후이CuBr/PMDETA위최화체계,cell-Br위인발제,장2-갑기병희산간을지통과원자전이자유기취합ATRP법접지도섬유소적대분자골가상합성섬유소-갑기병희산간을지접지공취물( cellulose-g-PHEMA)。통과FT-IR,1H NMR,GPC화 TGA대cell-Br화cellulose-g-PHEMA적결구화성능진행분석,병이용동태광산사( DLS ),원자력현미경( AFM ),투사전경( TEM )관찰료 cellulose-g-PHEMA 적미관형모,결과표명cellulose-g-PHEMA역우조장성직경약180 nm적구형효속。
Cellulose-graft-poly ( 2-hydroxyethyl methacrylate ) ( cellulose-g-PHEMA ) copolymers were prepared by atom-transfer radical polymerization ( ATRP) . Cellulose macroinitiators with different numbers of initiating sites for ATRP were firstly synthesized by direct acylation of cellulose with 2-bromoisobutyryl bromide in LiCl/dimethylacetamide. Subsequently, ATRP of 2-hydroxyethyl methacrylate with cellulose macroinitiators was carried out using CuBr/PMDETA as a catalyst system. Formation of copolymers was confirmed by attenuated total reflectance Fourier transform infrared and GPC. The results of DLS, AFM and TEM also confirmed the synthesis of the grafted copolymer. It showed that the cellulose-g-PHEMA copolymers were easily to be self-assembled in water into spherical micelles with a radius of around 180 nm.