竹纤维与丙烯酸的共辐照接枝改性  

Grafting Co-Polymerization of Acrylic Acid with Bamboo Fiber by γ-Radiation

作　　者：涂治勇[1] 罗颖[1] 叶心亮[1] 谢宝君[1] 董先明[1] 

机构地区：[1]华南农业大学理学院应用化学系/生物材料研究所,广东广州510642

出　　处：《高分子材料科学与工程》2011年第9期168-170,174,共4页Polymer Materials Science & Engineering

基　　金：广东省科技计划项目(2008B020300006);华南农业大学"211工程"三期重点资助项目(2009B010100001);华南农业大学新学科扶持基金(2007X008)

摘　　要：研究了60Co-γ射线辐照对竹纤维和丙烯酸进行接枝共聚反应条件,探讨了单体含量、辐照剂量、pH值等因素对接枝率的影响。研究结果发现,最佳共辐照接枝条件为:单体质量分数40%,辐照剂量5kGy,温度60℃,反应时间6 h,体系pH值为1,此时接枝率可达51.2%。红外光谱和扫描电镜表明丙烯酸与竹纤维发生了化学接枝而非物理吸附。热重分析表明共辐照接枝能改善竹纤维的热稳定性,XRD研究发现共辐照接枝后,竹纤维结晶度降低。Conditions for grafting co-polymerization of acrylic acid with bamboo fiber by γ-radiation were studied.Grafting percentage was affected by radiation dose,monomer concentration,pH of the reaction system.The results indicate that the optimum reaction conditions are as follows： 5kGy dose of radiation,monomer mass fraction 40%,pH value 1,radiation temperature 60 ℃,radiation time 6 h,51.2% of grafting percentage can be obtained.Infrared spectrum（IR） and scanning electron microscope（SEM） prove that the acrylic acid and the bamboo fiber are linking by chemical grafting,not sorption.The thermogravimetric（TG） analysis indicates that the grafting can improve the thermal stability of bamboo fiber,and the crystallinity of bamboo fiber after the grafting reduces by the X-ray diffraction（XRD） research.

关 键 词：竹纤维 丙烯酸 辐照接枝 

分 类 号：TQ342.91[化学工程—化纤工业]