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
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摘要
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.
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.
引文
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3 De Silva R,Wang X,Byrne N. Carbohydrate Polymers,2016,153,115.
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5 Rai S K,Mukherjee A K. Biocatalysis and Agricultural Biotechnology,2015,4(4),632.
6 Yang C L,Guan L T,Zhao Y M,et al. Ion Exchange and Adsorption,2007,23(3),259(in Chinese).杨崇岭,关丽涛,赵耀明,等.离子交换与吸附,2007,23(3),259.
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8 Jin E,Reddy N,Zhu Z,et al. Journal of Agricultural and Food Chemistry,2011,59(5),1729.
9 Keating IV J J,Lee A,Belfort G. Macromolecules,2017,50(20),7930.
10 Lee B S,Kim H,Choi I S,et al. Journal of Polymer Science Part A:Polymer Chemistry,2017,55(2),329.
11 Ou K,Wu X,Wang B,et al. Cellulose,2017,24(11),5211.
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