Control of degradation rate of biodegradable polymers (The application of corona discharge treatments)

生物降解聚合物降解速率的控制（电晕放电处理的应用）

基本信息

批准号：
12680578
负责人：
OSAWA Satoshi
金额：
$ 1.98万
依托单位：
Kanazawa Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2003
项目状态：
已结题

项目摘要

Effects of corona discharge treatment on the degradation rate of poly (L-lactic acid) (PLA) and Poly(ε-caprolactone) (PCL) and Poly(butylenesuccinate・adipate) (PBSA) have been investigated The treatment introduced oxygen containing functional groups onto the polymer surfaces The contact angles of these polymers decreased by 30〜60゜ indicating an increase in hydrophilicity on the polymer surfaces The composting degradation tests were carred out for both treated and untreated PLA, PCL and PBSA The treatment depressed the degradation of PLA, while it promoted the degradation of PCL and PBSAThe affinity between microorganisms (general bacteria, actinomycetes, fungi) and the polymer surfaces have also been estimated by a film-contacting method The results showed that the treatment decreased the affinity for PLA due to the production of lactic acid having antibacterial activity by the corona discharge treatment On the contrary, the corona treatment increased the affinity for PCL ~and PBSA Especially, Aspergillus sp rapidly adsorbed to the treated surfaces and has a significant degradation activity for PCL and PBSA The adsorption of lipase (from Aspergillus sp) onto the polymer surface was also increasedTo depress the degradation for several weeks, natural antibacterial substance, which was extracted from Japanese horseradish, was oated on the PCL and PBSA films The sinigrin (extracted from Japanese horse-radish) coated PCL and PBSA films were successfully depressed the degradation for 3 weeks, and then degraded immediately The PLA/starch blends coated with pure PLA and PCL were also made by a conventional coating method to control the degradation rate The degradations of the coated blends were depressed for 2〜4 weeks, after that they degraded immediately

电晕放电治疗对聚（L-乳酸）（PLA）和聚（ε-己酮酮）（PCL）和聚（丁基乙酸丁酯・脂肪）（PBSA）的降解率的影响已被研究引入了含氧于含氧的官能团上的官能团降低了这些官能团的杂音组，以降低了这些Polymer Ontriention Poligins odyrient of The Poligins odyrient of Trymins in 30-6-6-6聚合物表面对处理和未处理的PLA，PCL和PBSA进行了堆肥降解测试，治疗抑制了PLA的降解，同时它促进了PCL和PBSA的降解，而PCL和PBSA的降解则是微生物（Polycetria contical of Collemerctes confuncects，fungi surfyci cround actactection，fungi）之间的亲和力的降解。由于对比度的电晕放电治疗具有抗菌活性的产生而导致对PLA的亲和力降低了对PLA的亲和力，Corona处理使PCL〜和PBSA的亲和力尤其尤其是曲霉迅速吸附在治疗的表面上，并且在PCL和PBSA中具有显着的Decrimation（来自Lipsor）（来自Lipser）的显着去分裂活性。从日本辣根中提取的天然抗菌物质增加了几周的降解，在PCL和PBSA胶片上被启用了Sinigrin（从日本马匹）涂层的PCL和PBSA胶片上取出的PCL和PBSA薄膜，并通过降解了3周，然后降级了3周，然后降级了Pla/pla pul purs purs co co co co co co co co col co col co控制降解速率的方法涂层混合物的降解持续了2-4周，之后它们立即降解