【作者】 肖勇；

【导师】 陈国强；

【作者基本信息】 苏州大学 ， 纺织化学与染整工程， 2009， 硕士

【摘要】 摘要:原子转移自由基聚合(ATRP)是一种新的且有效的聚合方式,此聚合方法是一种分子量可控、分散性低的新型聚合方法。本文在水介质中采用原子转移自由基聚合法接枝改性真丝并进行了如下研究:1.将2-溴异丁酰溴与真丝反应制备大分子引发剂,以甲基丙烯酸二甲氨乙酯(DMAEMA)为单体,CuBr/五甲基二乙烯三胺(PMDETA)为催化体系,水为介质,采用原子转移自由基聚合法制备接枝改性真丝。研究了原子转移自由基接枝共聚过程中单体浓度、催化剂和配体用量、反应温度、时间以及pH值等对接枝反应的影响。并对普通化学接枝和原子转移自由基聚合接枝工艺及所得真丝的优缺点进行了比较。得出原子转移自由基聚合法反应条件温和,分子量可控等优点。2.研究了原子转移自由基聚合接枝改性前后真丝的各项性能,如强力、白度,回潮率,K/S等。通过傅立叶转换红外光谱,X-射线衍射和扫描电镜等对接枝真丝进行了结构分析。得出通过原子转移自由基聚合成功地将单体DMAEMA接枝到真丝上,对真丝的服用性能影响很小。3.研究了原子转移自由基聚合接枝改性真丝的抗菌整理,季铵化后的真丝织物获得了耐久的抗菌效果。更多还原

【Abstract】 Atom transfer radical polymerization (ATRP) is a new and efficient polymerization route, which could be used to prepare polymer with well controlled molecular weight and low polydispersity.Studies on modified silk by ATRP grafting method in aqueous were done as follows:1. Silk fibroin was reacted with 2-bromoisobutyryl bromide (BriB-Br) to obtain silk macroinitiator. The modified silk was prepared using dimethylaminoethyl methacrylate (DMAEMA) as monomer, CuBr/N, N, N’, N", N" -pentamethyldiethylenetriamine (PMDETA) as catalyst system via atom transfer radical polymerization method in water aqueous. The effect of monomer concentration, dosage of catalyst and ligand, reacting temperature, time and pH value on the grafting was discussed. The advantage and disadvantages of grafted silk by traditional chemical grafting and ATRP grafting method were compared. The results showed that ATRP method has advantages of mild reaction condition and controlled molecular weight.2. The mechanical properties, whiteness, moisture regain and K/S value of the untreated and grafted silk were measured. The structure of grafted silk was analyzed by FI-IR, XRD and SEM. The results indicated that DMAEMA monomer was triumphantly grafted onto silk by ATRP method, and it has little effect on silk wearability.3. The anti-bacterial finish of ATRP grafted silk was studied, the quaternized silk has durable anti-bacterial effect.更多还原