摘要
首先利用再生纤维素膜表面的羟基与2-溴异丁基溴进行反应,引入原子转移自由基聚合(ATRP)所需的大分子引发剂,然后在膜表面可控接枝具有pH敏感性的聚丙烯酸。通过X光电子能谱仪(XPS)、红外光谱测试(FT-IR),扫描电子显微镜(SEM)表征了膜的表面结构与形貌,证明已成功接枝上丙烯酸。采用膜通量测试研究了接枝膜对pH值的敏感性。实验结果证明,膜表面的接枝聚合具有一定可控性,同时pH敏感性的功能化可通过原子转移自由基聚合(A-TRP)来设计。
Regenerated cellulose fibers,in the form of a conventional filter paper,have been modified by reacting the hydroxyl groups on the fiber surface with 2-bromoisobutyryl bromide,followed by grafting with poly（acrylic acid）（PAA）using atom transfer radical polymerization（ATRP）conditions,which has pH modulated permeability properties.The papers were analyzed by X-ray photoelectron spectroscopy（XPS）,Fourier transform infrared attenuated total reflection spectrometer（FT-IR）,and scanning electron microscopy（SEM）.The results show that acrylic acid had been grafted on the surface of the regenerated cellulose membranes successfully.Then the pH modulated permeability properties of the membranes were researched by water flux measurement.This goes to show that the pH modulated permeability properties of a cellulose surface can be tailored by the use of ＂living＂/controlled radical polymerization method ATRP.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第3期156-159,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(20804002)
北京化工大学青年教师自然科学研究基金(QN0802)
关键词
再生纤维素膜
原子转移自由基聚合
PH敏感性
聚丙烯酸
regenerated cellulose membrane
ATRP
pH modulated permeability properties
poly（acrylic acid）
