Abstract
PVA-HA-Silk composite hydrogel was synthesized with polyvinyl alcohol (PVA), nano-hydroxyapatite (HA) and natural silk by using the method of repeated freezing and thawing. A series of tests were performed to study water content, stress relaxation behavior, elastic modulus, and creep characteristics of PVA-HA-Silk composite hydrogel. Orthogonal experimental design method was used to analyze the influence degree of PVA, HA and silk (three kinds of raw materials) on mechanical properties and water content of the PVA-HA-Silk composite hydrogel to select the best material ratio according to their overall performance. The results demonstrate that the mass percentage of P VA has the greatest impact on the water content, followed by HA and silk. Compression stress-strain variation of PVA-HA-Silk composite hydrogel presents a nonlinear relationship, which proves that it is a typical viscoelastic material. Comparing the mechanical properties of 16 formulas, the formula of PVA-HA-silk composite hydrogel with mass percentage of PVA 15%, HA 2.0% and silk 1.0% is the best.
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Zhang, D., Chen, K., Wu, L. et al. Synthesis and Characterization of PVA-HA-Silk Composite Hydrogel by Orthogonal Experiment. J Bionic Eng 9, 234–242 (2012). https://doi.org/10.1016/S1672-6529(11)60116-9
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DOI: https://doi.org/10.1016/S1672-6529(11)60116-9