不同分子量下双网络水凝胶的力学性能研究

Study on the Mechanical Properties of Dual-Network Hydrogels under Different Molecular Weights

摘要: 本文利用能量最小化原则，使用不同分子量的PEO SN和PAA SN两种单网络水凝胶聚合成最优的PEO-PAA DN水凝胶结构模型，对双网络水凝胶的力学性能进行研究。通过维里公式对力学性能进行评估，在600 PS内对双网络水凝胶施加300%的应变，得到组成双网络水凝胶的PEOSN和PAASN的聚合度和分子量均对双网络水凝胶的力学性能有显著影响。且PEO与PAA单链的聚合度分别为30和80左右、PEO SN和PAASN两层单网络分子比为5:9时，组成的双网络水凝胶力学性能最强。在此基础上，极大地推广了双网络水凝胶的应用。

Abstract: In this paper, using the principle of energy minimization, two single-network hydrogels with different molecular weights, PEO SN and PAA SN, are used to polymerize the optimal PEO-PAA DN hydrogel structure model to study the mechanical properties of the double-network hydrogel. The mechanical properties are evaluated by the Veri formula, 300% strain is applied to the dual-network hydrogel within 600 PS, and the degree of polymerization and molecular weight of the PEO SN and PAA SN that constitute the dual-network hydrogel are all comparable to those of the dual-network hydrogel. The mechanical properties have a significant impact. And when the degree of polymerization of the single chains of PEO and PAA is about 30 and 80, respectively, and the molecular ratio of the two-layer single network of PEO SN and PAA SN is 5:9, the mechanical properties of the double-network hydrogel formed are the strongest. On this basis, the application of dual-network hydrogels has been greatly promoted.