从分子设计的角度出发,选用具有优良pH敏感的丙烯酸(AAc)为基本原料,制备了pH敏感水凝胶,系统研究了水凝胶的基本物理性能(密度、平均分子量、交联密度、平衡态水含量、固定电荷密度等),测试了水凝胶在不同离子强度下的溶胀、退溶胀性能,并对其响应机理进行了探讨,同时对水凝胶的机械性能进行测试.结果表明:pH敏感水凝胶的机械性能随着pH值增大而变化,其变化幅度最大可达到80%;其机械性能强烈依赖于平衡态溶胀率;离子强度的大小也对水凝胶的机械性能有着决定性影响.
参考文献
| [1] | Zhang K;Wu XY .Temperature and pH-responsive polymeric composite membranes for controlled delivery of proteins and peptides.[J].Biomaterials,2004(22):5281-5291. |
| [2] | Kai Zhang;Huiyu Huang;Guocheng Yang;James Shaw;Christopher Yip;Xiao Yu Wu .Characterization of Nanostructure of Stimuli-Responsive Polymeric Composite Membranes[J].Biomacromolecules,2004(4):1248-1255. |
| [3] | Saraydin D;Karadag E;Isikver Y;Sahiner N;Guven O .The influence of preparation methods on the swelling and network properties of acrylamide hydrogels with crosslinkers[J].Journal of Macromolecular Science. Pure and Applied Chemistry,2004(4):419-431. |
| [4] | Sheng-Li Chen;Shuangfei Wang;Lucian A.Lucia .New insights into the fundamental nature of lignocellulosic fiber surface charge[J].Journal of Colloid and Interface Science,2004(2):392-397. |
| [5] | T. Y. Ng;Hua Li;Y. K. Yew;K. Y. Lam .Effects of Initial-Fixed Charge Density on pH-Sensitive Hydrogels Subjected to Coupled pH and Electric Field Stimuli: A Meshless Analysis[J].Journal of Biomechanical Engineering,2007(2):148-155. |
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