丙烯酰胺/海藻酸钠双网络水凝胶的成型及其材料性能研究

采用光固化缓释体系技术制备丙烯酰胺/海藻酸钠双网络水凝胶,传统方法制备丙烯酰胺单网络水凝胶和海藻酸钠单网络水凝胶,然后使用万能材料试验机对丙烯酰胺/海藻酸钠双网络水凝胶和丙烯酰胺单网络水凝胶做力学性能的检验,接着对丙烯酰胺/海藻酸钠双网络水凝胶力学性能的稳定性进行检验,最后将丙烯酰胺/海藻酸钠双网络水凝胶和海藻酸钠单网络水凝胶放入不同pH的溶液中分别检测溶胀率.结果显示,丙烯酰胺/海藻酸钠双网络水凝胶的最大应变和弹性模量都与丙烯酰胺单网络水凝胶显著不同.丙烯酰胺/海藻酸钠双网络水凝胶经过30 min的往复拉伸后,力学性能依然稳定,没有明显的变化,且在不同pH溶液内的溶胀率也明显不同.丙烯酰胺/海藻酸钠双网络水凝胶拥有稳定的力学性能,具有更稳定的溶胀率且快速到达溶胀平衡.因此,该双网络水凝胶具有较好的应用前景.

Study on fabrication of acrylamide/sodium alginate double network hydrogel and its material properties

The acrylamide/sodium alginate double-network hydrogel were prepared by light curing slow-gelling re-action. The acrylamide single network hydrogel and sodium alginate single network hydrogel were prepared by tradi-tional method. Subsequently, the mechanical properties of acrylamide/sodium alginate double-network hydrogel and acrylamide single network hydrogel were tested by universal material testing machine. Then stability of the mechani-cal properties of acrylamide/sodium alginate double-network hydrogel was tested. Finally, the swelling ratio of ac-rylamide/sodium alginate double-network hydrogel and sodium alginate single network hydrogel were tested in dif-ferent pH solutions. The experimental results showed that the maximum strain and elastic modulus of acrylamide/sodium alginate double-network hydrogel was significantly different from acrylamide single network hydrogel. After 30 minutes of repeated stretching, the mechanical properties of acrylamide/sodium alginate double-network hydro-gel remained stable, and the swelling ratio of acrylamide/sodium alginate double-network hydrogel was different in the solution which pH value was changed. The mechanical properties of acrylamide/sodium alginate double-network hydrogel were stable, and this double-network hydrogel showed a higher stability of swelling ratio and it rapidly reached equilibrium swelling. Therefore, this double-network hydrogel has a good application prospect.