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以聚乙二醇与马来酸酐的双酯化产物(MAh-PEG-MAh)、丙烯酰胺(AM)为单体,N,N’-亚甲基双丙烯酰胺(BIS)或对二乙烯基苯(DVB)为交联剂,通过原位自由基共聚法合成了一种复合水凝胶。利用FT-IR、1H-NMR、SEM、TEM表征了凝胶结构和形态;利用XRD研究了凝胶的结晶性;研究了单体用量、分子链段长度、交联剂等因素对凝胶力学性能的影响。研究表明,柔性链段MAh-PEG-MAh以一定尺寸的聚集微区分散于PAM连续相,增强水凝胶的结晶性,且分散相与连续相之间有良好的作用力,当MAh-PEG1K-MAh与AM的物质的量比为1∶8,复合水凝胶的压缩强度达到18.2 MPa左右,力学性能最佳。
(MAh-PEG-MAh), acrylamide (AM) as monomer, N, N’-methylenebisacrylamide (BIS) or p-divinyl Benzene (DVB) as crosslinking agent, a kind of composite hydrogel was synthesized by in situ free radical copolymerization. The structure and morphology of the gel were characterized by FT-IR, 1H-NMR, SEM and TEM. The crystallinity of the gel was characterized by XRD. The effects of monomer content, molecular chain length, cross-linking agent and other factors on the gel mechanics The impact of performance. The results show that the MAh-PEG-MAh flexible segment is dispersed in the PAM continuous phase with a certain size of aggregated micro-domains to enhance the crystallinity of the hydrogel, and the MAh-PEG-MAh has a good force between the dispersed phase and the continuous phase. The mass ratio of MAH to AM is 1: 8, and the compressive strength of composite hydrogel reaches about 18.2 MPa, which shows the best mechanical properties.