本研究是利用生物可分解性聚羥基丁酯戊酯(PHBV)及生物可吸收性高分子 材料聚乳酸- 甘醇酸Poly(Lactide-co-Glycolide) (PLGA) , 進行不同比例 (PHBV:PLGA 100/0,99/1,90:/0,80/20,70/30,50/50,0:100)的掺合形成薄 膜,期望增加材料的加工性,韌性及細胞相容性。掺合薄膜以DSC、TGA進行熱 分析,並以拉伸試驗進行機械性質研究;同時也針對薄膜的降解速率,與細胞相 容性分別加以評估。 實驗結果顯示,經DSC 分析,PLGA 含量在20%以下之掺合膜,都屬於完全 相容型的掺合膜;而PHBV/PLGA 70/30,50/50 的掺合膜,是屬於部份相容的掺合 膜。當添加PLGA 含量愈多,其Tc 值會比完全PHBV 的Tc 值增加2.5 ~ 14.1 ℃。 當添加PLGA 的比例增加時,最後熱裂解的溫度可增加20.6℃~55.8℃,使材料 的熱穩定性增加。經拉伸試驗分析,PLGA 含量增加,可增加PHBV 的韌性及延 展性,其中添加PLGA 20%,是最佳的改善比例。 由於含10% PLGA 的掺合膜,並不能使細胞有效的增生,藉由電漿表面改 質接枝,接上Acrylic acid,再分別接上軟骨素;實驗結果顯示,以PHBV-PAA /UV40min 法接枝的膜及PHBV-CHS/UV40min 法接枝的膜,其表面積羧基最多, 並且具有較佳的水接觸角(減少9 ~ 10 度),水的結合力(增加10 ~12.2 mN.m-1), 而以PHBV-CHS/UV40min 法接枝的膜有較多的軟骨素接枝在膜上,並可有效的 使細胞增生。而以血清預先處理改質膜,能確實增加細胞的貼附率以及細胞增殖的能力;希望未來能進行動物相容性的實驗,以及使用成分更低的掺合成分,使 掺合體能更適合產業發展,且更具進一步的適合其他生物醫學上應用,並且更具 有商品化的能力。
The purpose of this study is PHBV and PLGA are used to prepare blend polymer films.The compositions of the blend polymer films include PHBV:PLGA 100/0, 99/1,90/10,80/20,70/30,50/50,0/100.To increase the processability and reduce the toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate),The thermal and mechanical properties of the films were analyzed with DSC,TGA,and tensile test device; The degradability and biocompatibility of the films were also studied. The results showed that PHBV/PLGA 99/1、90/10、80/20 were miscible ; and PHBV / PLGA 70/30、50/50 were partially miscible .Pyrolysis temperature of the films increased with the increased of PLGA content.The toughness of PHBV blend polymer was highest when blending with 20% PLGA.The highest cell proliferation also observed in PHBV/PLGA 80/20 film.The cell compatibility can be further improved by plasma treatment and subsequent immobilization of Chondroitin-6-Sulfate.Among the immobilization methods,PHBV-CHS/UV40min showed good wettability(reduce by 9 degrees) and highest yield of Chondroitin-6-Sulfate on the surface,Pretreatment of modified film with serum resulted in the highest cell proliferation.In the future, animal compatibility test , will be needed to confirm the potential of using PHBV/PLGA blending films in medical applications.A further reduction of blending cost may lead to mass production of the films.