PLA/TiO_2有机无机杂化材料的制备及抗凝血性能研究
摘要
论文较深入地研究了PLA/TiO_2有机无机杂化材料的制备及杂化材料的抗凝血性能。
以乳酸为原料、辛酸亚锡为催化剂制备聚乳酸(PLA);以PLA、钛酸四正丁酯(TBT)为原料,采用溶胶凝胶法制备PLA/TiO_2有机无机杂化材料,并通过FT-IR、XPS等测试手段对相关产物进行结构表征。结果显示,PLA与钛溶胶发生了杂化反应,PLA与TiO_2组分间是以Ti-O-C键合。与纯的PLA相比,TiO_2的引入改善了聚乳酸的抗凝血性能,并且随着TiO_2含量的变化而变化,在TiO_2加入量为4wt%时效果最佳。
在PLA/TiO_2有机无机杂化材料的制备过程中,引入稀土元素Sm,制备出Sm掺杂的PLA/TiO_2有机无机杂化材料。Sm掺杂的PLA/TiO_2有机无机杂化材料的抗凝血性能随着Sm含量的增大而提高,达最大值又出现下降趋势,Sm加入量为0.6wt%时效果最佳。
The synthesis and anticoagulation property of poly (lacticacid) /TiO_2 hybrid material was studied in this paper.
The polylactic acid (PLA)was prepared from lactic acid with stannous octoate as the catalyst; Using tetrabutyl titanate (TBT) and PLA as the raw materials, the PLA/TiO_2 was synthesized by sol-gel method. The relative result products were characterized by FT-IR, XPS. The results show that hybrid reaction was occurred between PLA and TiO_2 sol resulting in forming Ti-O-C bonds. Compared with pure PLA, the anticoagulation property has been improved because of the introduction of TiO_2 and the best content of TiO_2 is 4 wt %.
PLA/TiO_2 hybrid material doped with Sm was prepared by the introduction of Sm during the preparation process. The anticoagulation property of hybrid material increases with increase the content of Sm and reached the maximum value for 0.6 wt % TiO_2, and then decreases.
以乳酸为原料、辛酸亚锡为催化剂制备聚乳酸(PLA);以PLA、钛酸四正丁酯(TBT)为原料,采用溶胶凝胶法制备PLA/TiO_2有机无机杂化材料,并通过FT-IR、XPS等测试手段对相关产物进行结构表征。结果显示,PLA与钛溶胶发生了杂化反应,PLA与TiO_2组分间是以Ti-O-C键合。与纯的PLA相比,TiO_2的引入改善了聚乳酸的抗凝血性能,并且随着TiO_2含量的变化而变化,在TiO_2加入量为4wt%时效果最佳。
在PLA/TiO_2有机无机杂化材料的制备过程中,引入稀土元素Sm,制备出Sm掺杂的PLA/TiO_2有机无机杂化材料。Sm掺杂的PLA/TiO_2有机无机杂化材料的抗凝血性能随着Sm含量的增大而提高,达最大值又出现下降趋势,Sm加入量为0.6wt%时效果最佳。
The synthesis and anticoagulation property of poly (lacticacid) /TiO_2 hybrid material was studied in this paper.
The polylactic acid (PLA)was prepared from lactic acid with stannous octoate as the catalyst; Using tetrabutyl titanate (TBT) and PLA as the raw materials, the PLA/TiO_2 was synthesized by sol-gel method. The relative result products were characterized by FT-IR, XPS. The results show that hybrid reaction was occurred between PLA and TiO_2 sol resulting in forming Ti-O-C bonds. Compared with pure PLA, the anticoagulation property has been improved because of the introduction of TiO_2 and the best content of TiO_2 is 4 wt %.
PLA/TiO_2 hybrid material doped with Sm was prepared by the introduction of Sm during the preparation process. The anticoagulation property of hybrid material increases with increase the content of Sm and reached the maximum value for 0.6 wt % TiO_2, and then decreases.
引文
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[30]Moon SI, Lee CW, Taniguchi I, et al. Melt/solid polycondensation of L-lactic acid: an alternative route to poly(L-lactic acid) with high molecular weight [J]. Polymer Communication, 2001, 42(11): 5059-5062
[31]赵凌冲,刘文明,肖青等.稀土固体超强酸SO42-/TiO_2-Ce4+直接法催化合成聚乳酸及其机理的研究[J].化工新型材料, 2006, 34(7): 28-30
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