α-环糊精主客体识别超分子水凝胶的制备及其宏观流变性能构建过程研究
Fabrication of α-CD Host-guest Recognition Supramolecular Hydrogel and Investigation on Its Macro-rheological Performance Establishment Process
贺杰 1叶子 1王宏申 2陈庆梅 3赵伟 4刘航瑞1
作者信息
- 1. 西南石油大学化学化工学院四川省油气田应用化学重点实验室,成都 610500
- 2. 中海油能源发展股份有限公司工程技术分公司,天津 300452
- 3. 中国石油西南油气田分公司天然气研究院,成都 610213
- 4. 中国石油川庆钻探工程有限公司地质勘探开发研究院,成都 610051
- 折叠
摘要
采用7 wt％的α-环糊精(α-CD)溶液和5 wt％的甲氧基聚乙二醇甲基丙烯酸酯均聚物(PMPEGA-2000)溶液制备了 α-CD/PMPEGA-2000超分子水凝胶,并对其形貌、结构、形成条件和宏观流变学性能构建过程进行了表征和研究.结果表明,体积比不低于1.5∶1是两种溶液混合后形成凝胶的必要条件;当体积比为2∶1时,形成的凝胶黏度最大.热重分析、X射线粉末衍射分析和扫描电镜结果表明,该凝胶是基于α-CD与PMPEGA-2000之间的主客体识别所形成,具有三维网络结构.光学微流变分析结果显示,该凝胶宏观流变性能的构建过程实则是凝胶内部主客体识别交联点不断增多,网络结构强度不断增强的过程.该过程始于α-CD溶液与PMPEGA-2000溶液混合后的8'36",在64'00"后基本完成,耗时约55'24".
Abstract
α-CD/PMPEGA-2000 supramolecular hydrogel was fabricated by mixing 7 wt％α-cyclodextrin(α-CD)aqueous solution with 5 wt％methoxy polyethylene glycol(2000)methacrylate homopolymer(PMPEGA-2000)aqueous solution.The necessary condition for the formation of the hydrogel was that the volume ratio of the two aqueous solution should not be less than 1.5∶1.When the volume ratio was 2∶1,a hydrogel with the highest viscosity can be obtained.The scanning electron microscopy results confirmed that there exist three-dimensional network structures in the hydrogel.The results of thermogravimetric analysis and X-ray powder diffraction analysis indicated that the formation of the hydroygel was based on the host-guest recognition between α-CD and PMPEGA-2000.The results of optical microrheological analysis showed that the macroscopic rheological performance establishment process of the hydrogel was actually a process of an increasing in the number of host-guest recognition crosslinking points,thereby constantly enhancing the strength of the network structure.The process started at 8'36"after the mixing of α-CD aqueous solution and PMPEGA-2000 aqueous solution,and was basically completed at 64'00".The entire process took about 55'24".
关键词
超分子水凝胶/三维网络结构/主客体识别/微流变/宏观流变性能Key words
Supramolecular hydrogel/Three-dimensional network structure/Host-guest recognition/Micro-rheology/Macro-rheological performance引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据