Decay behavior and stability of free radicals of silk fibroin with alkali/urea pretreatment induced by electron beam irradiation

doi:10.1016/j.polymdegradstab.2020.109344

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Decay behavior and stability of free radicals of silk fibroin with alkali/urea pretreatment induced by electron beam irradiation
	Zhang, H ; Tian, F ; Lin, HT ; Shen, RF ; Liu, WH ; Huang, YY ; Tang, ZF
刊名	POLYMER DEGRADATION AND STABILITY
	2020
卷号	181 页码:-
关键词	FABRICS
ISSN号	0141-3910
DOI	10.1016/j.polymdegradstab.2020.109344
文献子类	期刊论文
英文摘要	Silk fibroin determines the perseverance of silk-based materials. The samples of silk fibroin were pretreated combined alkali/urea system with rapid freezing in liquid nitrogen. The structural changes of unpretreated and pretreated silk fibroins were investigated by XRD, SAXS and FTIR. The results indicate that part of the amorphous region was transformed into silk-II crystalline structure, and the radius of gyration decreased due to the folding of molecular chains by hydrogen bonds. The free radicals of unpretreated and pretreated silk fibroin induced by electron beam irradiation were studied by electron spin resonance (ESR). The results indicate that the radical concentration increased by 10 times at 25 kGy and attained 8.04*10(19) spins.g(-1) at 50 kGy after pretreatment, which is comparable to the saturated radical concentration of unpretreated silk fibroin above 200 kGy. And the half-life time of free radicals is 10 times longer than that of the unpretreated samples. The higher stability of the free radicals is considered to be related to the protein structure changes induced by pretreatment and this can provide convenience for silk irradiation grafting. The new pretreatment method may provide inspiration for designing protein structures to regulate free radical formation. (C) 2020 Elsevier Ltd. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32776]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Zhejiang Sci Tech Univ, Int Inst Silk, Coll Text Sci & Engn, Hangzhou 310018, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 3.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China 4.Guangxi Univ Sci & Technol, Coll Biol & Chem Engn, Liuzhou 545006, Peoples R China
推荐引用方式 GB/T 7714	Zhang, H,Tian, F,Lin, HT,et al. Decay behavior and stability of free radicals of silk fibroin with alkali/urea pretreatment induced by electron beam irradiation[J]. POLYMER DEGRADATION AND STABILITY,2020,181:-.
APA	Zhang, H.,Tian, F.,Lin, HT.,Shen, RF.,Liu, WH.,...&Tang, ZF.(2020).Decay behavior and stability of free radicals of silk fibroin with alkali/urea pretreatment induced by electron beam irradiation.POLYMER DEGRADATION AND STABILITY,181,-.
MLA	Zhang, H,et al."Decay behavior and stability of free radicals of silk fibroin with alkali/urea pretreatment induced by electron beam irradiation".POLYMER DEGRADATION AND STABILITY 181(2020):-.