【摘要】：聚合物共混可實現(xiàn)材料改性,使共混物的性能達(dá)到協(xié)同作用。通過文獻(xiàn)查閱可知,殼聚糖(CS)與聚乙烯醇(PVA)相容性良好,可實現(xiàn)共混。殼聚糖和聚乙烯醇來源廣泛、對人體無害、可生物降解、生物相容性好以及成膜性好,因此可通過共混降低成本,優(yōu)化性能,擴(kuò)大其應(yīng)用范圍。本論文主要研究殼聚糖與聚乙烯醇共混膜的成型工藝,并在此基礎(chǔ)上采用濕法紡絲技術(shù)制備殼聚糖與聚乙烯醇共混纖維,最終得到力學(xué)性能較好的共混纖維；并通過SEM、FT-IR、 XRD、DSC對共混纖維的結(jié)構(gòu)性能進(jìn)行表征,并對殼聚糖與聚乙烯醇共混纖維的其它性能如力學(xué)性能、吸放濕性能等進(jìn)行研究；測試共混纖維的抗菌性能,判斷聚乙烯醇的引入是否會削弱殼聚糖纖維的抗菌性能。最后本論文取得了以下主要結(jié)果： (1)殼聚糖與聚乙烯醇共混膜的最佳工藝參數(shù)為：殼聚糖含量為50%,凝固浴濃度為5%,凝固溫度為40℃,凝固時間為60s。醇洗工序和初晾干工序可提高殼聚糖與聚乙烯醇共混膜的力學(xué)性能。 (2)殼聚糖與聚乙烯醇共混纖維的制備工藝研究：介紹濕法紡絲工藝參數(shù)對共混纖維的影響,優(yōu)選力學(xué)性能較佳的殼聚糖與聚乙烯醇共混纖維。 (3)殼聚糖與聚乙烯醇之間有較強(qiáng)的分子間作用,使共混纖維的結(jié)晶度得到了提高；殼聚糖與聚乙烯醇共混纖維的粗細(xì)比較均勻,橫截面形狀不規(guī)則,纖維表面有溝槽。聚乙烯醇加入后改善了殼聚糖纖維的力學(xué)性能；殼聚糖與聚乙烯醇共混纖維的回潮率為12.2%,略低于殼聚糖纖維的13.5%,但吸濕性能仍良好。 (4)殼聚糖與聚乙烯醇共混纖維對大腸桿菌和金黃色葡萄球菌的抑菌率均在99%以上,可見共混纖維中聚乙烯醇對殼聚糖纖維的抗菌性能影響很小
[Abstract]:Polymer blending can achieve material modification and make the properties of the blends synergistic. According to literature review, chitosan (CS) and polyvinyl alcohol (PVA) have good compatibility and can be blended. Chitosan and polyvinyl alcohol have a wide range of sources, which are harmless to human body, biodegradable, biocompatible and film-forming, so it can reduce the cost, optimize the performance and expand the application range by blending. In this paper, the forming process of chitosan / PVA blend film was studied. Based on this, chitosan / PVA blend fiber was prepared by wet spinning technology. Finally, the blend fiber with better mechanical properties was obtained. The structure and properties of the blend fibers were characterized by SEM,FT-IR, XRD,DSC, and other properties such as mechanical properties, moisture absorption and desorption properties of chitosan / PVA blend fibers were studied. The antibacterial properties of the blend fibers were tested to determine whether the introduction of polyvinyl alcohol would weaken the antibacterial properties of chitosan fibers. The main results are as follows: (1) the optimum technological parameters of chitosan / PVA blend film are as follows: chitosan content is 50, coagulation bath concentration is 5, solidification temperature is 40 鈩，

本文編號：2400440