摘要
以三乙二醇双丙烯酸酯(TEGDA)为共聚单体,通过可逆加成-断裂链转移(RAFT)聚合反应,将N,N'-亚甲基双丙烯酰胺(MBA)凝胶纤维直接转化为聚合物微米管.用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、红外光谱(FTIR)和元素分析等表征了聚合物微米管的结构和组成.研究结果表明,TEGDA的加入可显著提高聚合物微米管的产率,并使其具有自支撑性.环境扫描电子显微镜(ESEM)原位表征结果表明,聚合物微米管具有一定的溶剂溶胀性能.采用流变仪测定了加入TEGDA前后的聚合物凝胶的机械性能,相对于MBA凝胶,聚合物凝胶的机械性能显著提高.
Polymer microtubes were fabricated by copolymerizing N,N′-methylene bisacrylamide（MBA） organogel fibers and triethylene glycol diacrylate（TEGDA） via reversible addition-fragmentation chain transfer（RAFT） polymerization.The tubular structure and compositions of the polymer microtubes were demonstrated by scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,Fourier transform infrared（FTIR） spectrometer and elemental analysis.In presence of TEGDA,the yield of the polymer microtubes was enhanced significantly and the resulting tubes had self-supporting ability.The in-situ observation of the polymer microtubes by environmental scanning electron microscopy（ESEM） indicated the swelling property of the tubes in solvent.The mechanical properties of the gels were measured by a rheometer.The results show that the storage modulus（G′） and loss modulus（G″） of the polymer gel are much higher than those of the MBA organogel.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第6期1542-1546,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21174079,20874055)
国家“八六三”计划项目(批准号:2009AA062903)资助
关键词
三乙二醇双丙烯酸酯
可逆加成-断裂链转移聚合
凝胶
纤维
聚合物微米管
Triethylene glycol diacrylate
Reversible addition-fragmentation chain transfer polymerization
Gel
Fiber
Polymer microtube
