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合成了一种磁性Fe3O4纳米颗粒稳定的水包油(O/W)Pickering乳液并以其作为交联剂,在适宜条件下引发单体丙烯酰胺聚合来制备了一种新型的磁性高强复合水凝胶.采用X射线衍射(XRD)及场发射扫描电子显微镜(SEM)分别对磁性Fe3O4纳米颗粒和复合水凝胶的结构进行了表征,结果表明Pickering乳胶粒子较均匀地分布在复合凝胶网络中.溶胀性能测试及溶胀动力学分析表明复合水凝胶具有良好的溶胀性能,能够吸收自身干重100倍左右的水,其溶胀过程不遵循Fickian扩散模型;拉伸测试表明该水凝胶具有优异的力学性能,其拉伸强度能够达到150 kPa左右,断裂伸长率能够达到300%左右,并且当其承受的应力释放后能快速地恢复到初始形态.磁性能测试的结果显示该水凝胶具有良好的磁性.
A magnetic Fe3O4 nanoparticle stabilized oil-in-water (O / W) Pickering emulsion was synthesized and used as a cross-linking agent to initiate the polymerization of acrylamide monomer under appropriate conditions to prepare a novel magnetic high-strength composite hydrogel The structures of magnetic Fe3O4 nanoparticles and composite hydrogels were characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (SEM), respectively. The results showed that the Pickering latex particles were more evenly distributed in the composite gel network The swelling property test and swelling kinetic analysis show that the composite hydrogel has good swelling property and can absorb about 100 times of dry weight of water, and its swelling process does not follow the Fickian diffusion model. Tensile tests show that the hydrogel has excellent Of the mechanical properties of the tensile strength can reach 150 kPa or so, the elongation at break can reach about 300%, and when the stress is released to quickly return to its original form after the magnetic properties of the test results show that the hydrogel Has a good magnetic.