含聚甲基丙烯酸二甲氨基乙酯刷的羽毛接枝共聚物的制备及性能

Preparation of Feather Grafted Copolymer Containing Poly (Dimethylaminoethyl Methacrylate) and Its Properties

采用电子转移活化再生催化剂原子转移自由基聚合(ARGET ATRP)的方法,以羽毛表面的溴为引发位点,引发甲基丙烯酸二甲氨基乙酯(DMAEMA)在羽毛表面自增长,制备含聚甲基丙烯酸二甲氨基乙酯刷的羽毛接枝共聚物(Feather-g-PDMAEMA)。再以溴乙烷为改性试剂,对其进行季铵化处理,制备具有抗菌性能的羽毛接枝共聚物。改性后羽毛的元素含量、官能团、热稳定性、结晶结构、表面形貌分别通过能谱仪(EDS)、傅里叶变换红外光谱仪(FT-IR)、热重分析仪(TGA)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)进行表征。FT-IR和SEM分析结果表明,甲基丙烯酸二甲氨基乙酯成功地接枝到羽毛的表面,所得羽毛接枝共聚物的接枝率最高可达84. 7%; XRD的分析结果显示,接枝聚合后的羽毛的结晶度降低; TGA分析结果显示,接枝聚合后的羽毛热稳定性降低;抗菌测试结果表明,季铵化处理后的Feather-g-PDMAEMA具有良好的抗菌效果。

The feather grafted copolymer containing poly(dimethylaminoethyl methacrylate)(Feather-g-PDMAEMA)was synthesized via electron transfer atom transfer radical polymerization(ARGET ATRP),taking the carbonyl bromide groups on the feather surface as initiator and 2-(dimethylamino)ethyl methacrylate(DMAEMA)as grafting monomer.Subsequently,the DMAEMA grafted feather was quaternized by modification reagent bromoethane,and the feather grafted polymer with antibacterial properties was acquired.Furthermore,EDS,FT-IR,TGA,XRD and SEM were employed to characterize the element content,chemical structure,thermal stability,crystalline structure and surface morphology of the modified feather.The results of FT-IR and SEM analysis verified that 2-(dimethylamino)ethyl methacrylate was successfully grafted onto the surface of feather and the grafting rate of Feather-g-PDMAEMA could be as high as 84.7%.The results of XRD indicated that the crystallinity of feathers declined after grafting polymerization.It could be found from the results of TGA analysis,there was a certain decrease in the thermal stability of Feather-g-PDMAEMA.As revealed by antibacterial test,quaternized Feather-g-PDMAEMA possessed favorable antibacterial effect.