聚己内酯在海水中降解性能的研究  

Degradability of Polycaprolactone in Seawater Environment

作　　者：陈晓蕾[1] 石建高[1] 史航[1] 刘永利[1] 张忭忭[1] 王鲁民[1] 

机构地区：[1]中国水产科学研究院东海水产研究所农业部海洋与河口渔业资源及生态重点开放实验室,上海200090

出　　处：《海洋渔业》2010年第1期82-88,共7页Marine Fisheries

基　　金：国家高新技术研究发展(863计划)专项(2006AA100301);中央级公益性科研院所基本科研业务费专项资金(中国水产科学研究院东海水产研究所)资助项目(2007M10);浙江省海洋开发管理项目(浙财农字〔2007〕406号);浙江省重大科技专项农业项目(2008C12066)

摘　　要：研究聚己内酯（PCL）样条在海水中历经10个月的可降解性能。对每个月取样样品的降解性能通过凝胶渗透色谱（GPC）、差示扫描量热仪（DSC）、傅里叶红外光谱（FTIR）和力学性能进行评价，并对试样的内部形貌采用扫描电镜（SEM）进行观察。SEM照片显示，随着降解时间的增加，材料内部并没有出现明显空洞和裂纹，但样品淬断面变得平整，显示材料的脆性增加。GPC结果显示，随着在海水中降解时间的增加，样品分子量及其分布均逐渐减小；样条的力学性能下降，由于水分子的增塑作用，在海水中降解4～7月期间，样条的拉伸强度和断裂伸长率下降的趋势变缓。DSC分析显示，由于分子链段的断裂和优先降解无定形区域这两方面的共同因素，随着降解时间的增加，样品的结晶度略为增加。FTIR分析测试进一步证明了GPC和DSC的测试分析结果。分析表明PCL样品在海水中具有一定的降解性，但是降解速度较为缓慢。Degradability of polycaprolactone（PCL） in seawater environment for 10 months was studied. The degradability of samples was studied monthly by GPC, DSC, FTIR and mechanical property analysis, and SEM was used to observe the inner conditions of samples. SEM photographs showed that no void or crackle appeared on the surface of PCL during degradation, but the surface became smoother, which indicated increased brittleness. The values of molecular weight and distribution of composites both decreased as degradation proceeded, meanwhile mechanical properties of PCL also decreased. However, because of the plasticizing effect of water, the decrease tendency of tensile property and elongation rate at break became gentle. DSC results showed： with the combined effect of molecular chain rupture and degradation mainly occurring in amorphous region, the crystallinity of PCL increased slightly as degradation time increased. FTIR results further confirmed the analysis results of GPC and DSC. The analysis showed PCL had certain degradability in seawater, but the biodegradation process was very slow.

关 键 词：聚己内酯 降解 结晶度 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]