Gu Z Q, Xiao J M, Zhang X H
Department of Corrosion Engineering, College of Materials Science and Engineering, University of Science and Technology Beijing, P.R. China.
Biomed Mater Eng. 1998;8(2):75-81.
Aqueous poly(vinyl alcohol) solutions were frozen at -20 degrees C for 6-12 h, and subsequently thawed for 1-2 h. The above mentioned process repeated for 1-3 times. After the specimen was dehydrated in vacuum, a kind of artificial articular cartilage--PVA-hydrogel--was developed. The micromorphology of PVA-hydrogel has been observed by means of optical microscopy and SEM. DSC and mechanical tests have been employed to investigate the influence of freezing, thawing, dehydrating and irradiating upon the crystallinity and the mechanical properties of PVA-hydrogel.
将聚乙烯醇水溶液在-20℃下冷冻6至12小时，随后解冻1至2小时。上述过程重复1至3次。在样品真空脱水后，制备出一种人工关节软骨——聚乙烯醇水凝胶。通过光学显微镜和扫描电子显微镜观察了聚乙烯醇水凝胶的微观形态。采用差示扫描量热法和力学测试研究了冷冻、解冻、脱水和辐照对聚乙烯醇水凝胶结晶度和力学性能的影响。
