Grafting modification of ramie fibers with poly(2,2,2-trifluoroethyl methacrylate) via reversible addition-fragmentation chain transfer (RAFT) polymerization in supercritical carbon dioxide

被引：36

作者：

Liu, Xiaoyan ^{[1
,2
]}

Chen, Jing ^{[1
]}

Sun, Ping ^{[1
]}

Liu, Zhong-Wen ^{[1
,2
]}

Liu, Zhao-Tie ^{[1
,2
]}

机构：

[1] Shaanxi Normal Univ, Minist Educ, Key Lab Appl Surface & Colloid Chem, Xian 710062, Peoples R China

[2] Shaanxi Normal Univ, Sch Chem & Mat Sci, Xian 710062, Peoples R China

来源：

REACTIVE & FUNCTIONAL POLYMERS | 2010年 / 70卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Ramie fiber; Supercritical carbon dioxide; Grafting modification; 2,2,2-Trifluoroethyl methacrylate; RAFT; TRANSFER RADICAL POLYMERIZATION; 2,2,2-TRIFLUOROETHYL METHACRYLATE; NATURAL FIBERS; CELLULOSE; POLYMERS; CO2; COPOLYMERIZATION; SYSTEMS; PLANT;

D O I：

10.1016/j.reactfunctpolym.2010.10.007

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Reversible addition-fragmentation chain transfer (RAFT) polymerization was used to control the grafting of 2,2,2-trifluoroethyl methacrylate (TFEMA) with ramie fibers in supercritical carbon dioxide (scCO(2)). The hydroxyl groups of the ramie fibers were converted to 2-dithiobenzoyl isobutyrate as the RAFT chain transfer agent (cellulose-CTA). Then, the subsequent grafting with TFEMA was mediated by RAFT polymerization in the presence of 2-(ethoxycarbonyl)prop-2-yl dithiobenzoate (ECPDB) as the free RAFT chain transfer agent (free CIA). The modified ramie fibers were highly hydrophobic with water contact angles of up to 149 degrees. Size exclusion chromatography showed narrow polydispersity (PDI = 1.28) of the grafted poly(TFEMA) chains. This grafting polymerization process is a novel and environmentally friendly approach for the preparation of functional grafted copolymers utilizing ramie fiber biomass. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：972 / 979

页数：8

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