摘要
通过酶促反应和可逆加成-断裂链转移聚合(RAFT)聚合得到温度敏感性的双糖无规聚合物聚(二聚乙二醇单甲醚甲基丙烯酸酯-6-O-乙烯基己二酸-D-吡喃型葡萄糖/半乳糖酯)[Poly(DEGMA-co-OVNGmix)];利用还原剂将聚合物末端的硫酯键还原,得到末端为-SH的聚合物分子以S-Au键修饰到金纳米星表面。采用傅里叶红外光谱仪、透射电镜和核磁氢谱等手段对聚合物和复合金纳米星的理化性质和光热转化能力进行研究。结果表明:AuNSs@Poly(DEGMA-co-OVNGmix)成功制备,该复合粒子的平均粒径为50~100nm,并且具有良好的稳定性。光热性能测试结果表明,复合粒子的光热转换效率达到50.54%,说明经修饰的金纳米星具有优异的光热转换能力。
The temperature-sensitive random glycopolymer,Poly(DEGMA-co-OVNGmix)was synthesized by enzymatic reaction and fracture chain transfer(RAFT)polymerization.After the thioester bond at the end of the glycopolymer was reduced by reductant,the glycopolymer molecule with the end of the S-H bond was obtained and modified to the surface of the gold nanostar(AuNS)by the S-Au bond.The structure and photothermal properties of the grafted AuNSs were characterized by Fourier transform infrared spectroscopy(FT-IR),nuclear magnetic resonance(~1H-NMR)and transmission electron microscopy(TEM).The results showed that AuNSs@Poly(DEGMA-coOVNGmix)was successfully prepared and its stability was greatly improved by the modification of glycopolymer.The average sizes of the grafted nanoparticles were 50~100 nm.The results of photothermal performance test proved that the photothermal conversion efficiency of these nanostars achieved 50.54%.In addition,the modified gold nanoparticles had excellent photothermal conversion capability.
作者
张仪娜
蔡豪
郑永利
权静
Zhang Yina;Cai Hao;Zheng Yongli;Quan Jing(Key Laboratory of Science and Technology of Eco-Textiles,Ministry of Education,College of Chemistry,Chemical Engineering and Biotechnology,Donghua University,Shanghai 201620;State Key Laboratory of Molecular Engineering of Polymers(Fudan University),Shanghai 200433)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第3期259-264,共6页
New Chemical Materials
基金
国家自然科学基金(21303014)
聚合物分子工程国家重点实验室(复旦大学)开放课题(K2017-18)。
