单纯使用聚乙烯醇韧性较高，力学性能不足。
Simple use of polyvinyl alcohol with high toughness, mechanical properties.
聚乙烯醇的生物相容性良好，得到了医疗材料的高度重视。
The biocompatibility of polyvinyl alcohol is good, and the medical material is highly valued.
所以在常温下，聚乙烯醇水溶液的胶凝会持续数十天或者更长的时间。
At room temperature, PVA would take over ten days or even longer time to gelate.
所以在常温下，聚乙烯醇水溶液的胶凝会持续数十天或者更长的时间。
At room temperature, PVA would take over ten days or even longer time to gelate.
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