纺织学报 ›› 2017, Vol. 38 ›› Issue (05): 25-30.doi: 10.13475/j..fzxb.20160702206

• 纤维材料 • 上一篇    下一篇

丝素/丙烯酰胺/丙烯酸吸水复合材料的紫外光辐照法制备

  

  • 收稿日期:2016-07-07 修回日期:2016-12-23 出版日期:2017-05-15 发布日期:2017-05-16

Preparation of water-absorbing composite of silk fibroin/acrylamide/acrylic acid by UV irradiation

  • Received:2016-07-07 Revised:2016-12-23 Online:2017-05-15 Published:2017-05-16

摘要:

为制备生物相容性和生物降解性较好的丝素/ 丙烯酰胺/丙烯酸类吸水复合材料,在传统丙烯酰胺(AM)/丙烯酸(AA)吸水复合材料中引入丝素蛋白,借助于紫外光活化作用,通过光引发剂结合丝素蛋白中酪氨酸上酚羟基、丝氨酸中醇羟基的H元素,使丝素上产生活性自由基,与丙烯酰胺和丙烯酸单体进行接枝共聚。以冻干法制备了丝素/丙烯酰胺/丙烯酸复合材料。通过测定丝素材料的相对分子质量变化、结构特征、热性能和表面形态结构,分析不同条件下制得的丝素复合膜材料的结构与性质差异,评价复合材料吸水保水性和重复吸水性能。结果表明:在紫外光辐照下,丝素可与丙烯酰胺、丙烯酸接枝共聚,使丝素蛋白分子质量增加;其结构中乙烯基特征峰消
失,热稳定性提高,具有优良吸水保水性和重复吸水性。

关键词: 紫外光辐照, 丝素蛋白, 丙烯酰胺, 丙烯酸, 吸水复合材料

Abstract:

In order to prepare water-absorbing composite of fibroin/acrylamide/acrylic acid with better biocompatibility and biodegradability, silk fibroin was introduced into the conventional water-absorbing composite of acrylamide/acrylic acid. To obtain active free radicals on silk fibroins, UV irradiation was used to activate fibroin molecules via binding hydrogen of phenolic group of tyrosine residues and alcoholic hydroxyl in serine residues. Thus, the graft copolymerization of AM and AA with silk fibroins was carried out. The composite membrane of fibroin/AM/AA were prepared by freexe-drying method. The changes in the molecular weights of fibroin materials, structure characteristics, thermal characteristics and surface morphologies of the composite fibroin emebranes under fifferent treating conditions were investigated, respectively. The water absorption and comservation properties and conservation peoperties and repeated water-absorbing performance were also evaluated. The results indicate that AM and AA are successfully grafted and copolymerized onto fibroin surfaces, leading to an increase to an increase of molecular weight of fibroin proteins. The structure characteristic of vinyl disappeared in the composite material and improved thermal stability is achieved. Meanwhile, acceptable water swelling and conservation properties along with repeated water absorption capabitity for the composite membrane are also obtained.

Key words: UV irradiation, silk fibroin, acrylamide, acrylic acid, water-absorbing composite

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