摘要
采用改进的Hummers法制备氧化石墨烯(GO),用聚乙烯亚胺(PEI)还原GO得到了PEI-GO复合材料,再通过共混法制备出PEI-GO改性的水性聚氨酯(PGWPU)复合材料。红外光谱、X射线光电子能谱和X射线多晶体衍射测试表征了PEI的成功引入。由于PEI-GO的加入,使得PGWPU复合胶膜的力学性能得到了很大提高,加入1.0%的PEI-GO后,PGWPU的拉伸强度和断裂伸长率较纯水性聚氨酯分别提高了131.88%和62.55%。以大肠杆菌(E.coil)为测试菌种,通过贴膜法表征了胶膜的抗菌性。结果表明,当PEI-GO质量分数为0.2%时,胶膜对大肠杆菌的抗菌率为99.9%。
Graphite oxide(GO)was prepared by improved Hummers method,PEI-GO composites were prepared by reducing GO with polyethyleneimine(PEI),and PEI-GO modified waterborne polyurethane(PGWPU)composites were prepared by blending method.The successful introduction of PEI was characterized by FT-IR,XPS and XRD.Due to the addition of PEI-GO,the mechanical properties of PGWPU composite films are greatly improved.After adding 1.0%PEI-GO,the tensile strength and elongation at break of PGWPU are increased by 131.88%and 62.55%respectively compared with pure waterborne polyurethane.E.coli was used as test strain,and the antimicrobial activity of the films was characterized by the method of coating.The results show that when the PEI-GO mass fraction is 0.2%,the antibacterial rate of the film to E.coli is 99.9%.
作者
于倩倩
杨建军
吴庆云
吴明元
张建安
刘久逸
Qianqian Yu;Jianjun Yang;Qingyun Wu;Mingyuan Wu;Jian’an Zhang;Jiuyi Liu(School of Chemistry and Chemical Engineering of Anhui University&Key Laboratory ofEnvironment-Friendly Polymer Materials of Anhui Province,Hefei 230601,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2021年第2期124-129,共6页
Polymer Materials Science & Engineering
基金
2018年度安徽省科技重大专项(18030901077)。
关键词
氧化石墨烯
聚乙烯亚胺
水性聚氨酯
抗菌
graphene oxide
polyethylenimine
waterborne polyurethane
antibacterial