摘要
在离子液体1-丁基-3-甲基咪唑氯盐(Bmim Cl)中,通过羟基与单体ε-己内酯之间的开环接枝聚合反应(ROP),制备Cellulose-g-PCL两亲性衍生物,利用红外光谱、核磁共振、X射线衍射、热重分析等技术对其结构和性能进行表征。通过改变催化剂种类和单体用量调节聚合物分子内疏水/疏水基团比例。荧光探针、透射电镜和动态光散射分析结果表明,Cellulose-g-PCL聚合物在水相中可自组装形成均一球形胶束,粒径位于纳米尺度范围内(30-130 nm),聚合物临界胶束浓度(CMC)较低(9.42-83.43μg/m L)。胶束粒径和CMC值均随聚己内酯的接枝率增加而降低。
Self-associating cellulose-graft-poly( ε-caprolactone)( cellulose-g-PCL) copolymers were successfully synthesized via ring-opening polymerization( ROP) between ε-CL and hydroxyl groups in ionic liquid 1-N-butyl-3-methylimidazolium chloride( Bmim Cl). Their structural and physical properties were characterized by FT-IR,NMR,XRD and TGA. By controlling the catalyst categories and ε-CL feed ratios,molecular architecture of these copolymers can be altered. As evidenced by analysis of fluorescence probe,dynamic light scattering( DLS) and TEM,these copolymers could self-assemble into spherical-like micelles in water. The size of micelles is ranged from 30 nm to 130 nm,and critical micelle concentration( CMC) is very low( 9. 42 - 83. 43 μg / m L). The CMC values and micelle sizes can be controlled by varying the grafting ratio of PCL.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第8期16-21,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(31170554)
大连工业大学青年基金(28000123)
制浆造纸科学与技术教育部重点实验室开放基金(08031338)
辽宁省大学生创新创业训练计划项目(201410152028)
关键词
纤维素
两亲性
聚己内酯
自组装
胶束
cellulose
amphiphilic
poly(ε-caprolactone)
self-assembly
micelle