کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5201379 | 1502892 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improving the photostability of silk using a covalently-bound UV absorber
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The covalent coupling reaction between the tyrosine residues on silk fibroin and a hydroxyphenyl benzotriazole UV absorber containing a diazonium group caused a decrease in UV-visible transmittance through silk fabric together with yellowing due to the presence of the conjugated azo-benzotriazole chromophore. After exposure to UV irradiation, untreated silk was yellowed due to photooxidation of the aromatic amino acid residues in the fibroin protein, whereas the modified silk concurrently experienced some photoyellowing of the protein, together with photobleaching of the covalently bonded conjugated chromophore. Although application of the UV absorber caused a decrease in tensile strength, modification of silk with a higher amount led to a very low color change and less decrease in tensile strength than untreated silk fabric following UV irradiation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 121, November 2015, Pages 187-192
Journal: Polymer Degradation and Stability - Volume 121, November 2015, Pages 187-192
نویسندگان
Weiguo Chen, Zongqian Wang, Zhihua Cui, Donghui Pan, Keith Millington,