紫外光照法制备有机表面单分子羧基层  

Introducing Mono-Layer Carboxylic Acid Functionality onto the Surface of Polyolefin Substrates via UV-Assisted Reactions

作　　者：徐菁[1,2] 马育红[2] 杨万泰[1,2] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《高分子材料科学与工程》2010年第9期60-63,共4页Polymer Materials Science & Engineering

基　　金：长江学者和创新团队发展计划(IRT0706);北京化工大学化工资源有效利用国家重点实验室基金资助

摘　　要：研究了通过紫外光辐照,在双向拉伸聚丙烯和低密度聚乙烯膜表面制备单分子层羧基的方法。激发态的丙酮分子先从有机聚合物的表面夺取C-H键的氢,生成大分子链自由基;然后过氧化丁二酸(BOS)裂解产生的带羧基的自由基与大分子链自由基偶合形成羧基。通过水接触角(CA)、紫外吸收光谱(UV)、X射线光电子能谱(XPS)和酸碱滴定等试验,证明在聚合物基材表面有羧基。对反应的工艺参数,如光照强度,光照时间、反应液的配方及BOS浓度等进行了考察。最佳的条件为:光强为8500μW/cm2,丙酮/水=3/7,BOS溶液为1%(质量/体积),光照15min。A method of introducing mono-layer carboxylic groups onto BOPP and LDPE surfaces by ultraviolet irradiation assisted process was developed. Under UV irradiation,excited acetone abstracted the hydrogen from the C-H bonds to form chain free radicals,then these radicals coupled with the carboxylic group free radicals from the precursor of succinic acid acyl peroxides to form a monolayer carboxylic functionality onto the surface of the substrates. Contract angle （CA）,ultraviolet spectra（UV）,X-ray photoelectron spectroscopy（XPS） and titration demonstrate that carboxyl groups are successfully introduced onto the surfaces. Several conditions were studied,such as light intensity,irradiation time,prescription of the solution,and concentration of BOS. The optimized condition is irradiating films at 8500 μW/cm2,with 1% BOS solution which AC/H2O=3/7 as solute for 15 min.

关 键 词：紫外辐照 表面羧基化 单分子层 过氧化丁二酸 

分 类 号：TQ316.65[化学工程—高聚物工业]