کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5512155 | 1540222 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of heat pretreatment of starch on graft copolymerization reaction and performance of resulting starch-based wood adhesive
ترجمه فارسی عنوان
اثرات پیشگیری از پیشگیری از گرمایش نشاسته بر واکنش کوپلیمرازی پیوند و عملکرد چوب چسب چوب بر پایه نشاسته
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کلمات کلیدی
پیش درمان گرما کوپلیمریر شدن پیوند، عملکرد چسب چوب چوب بر پایه نشاسته،
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
چکیده انگلیسی
In this study, effects of starch heat pretreatment at 70, 80 and 90 °C on graft copolymerization reaction with vinyl acetate (VAc) and the performance of the resulting starch-based wood adhesive (SWA) were investigated. It was shown that SWA pretreated at 90 °C achieved the best performance. At this temperature, the bonding capacity improved by 17.84% compared to the adhesive synthesized without heat pretreatment and the viscosity increased by 18.16% after 7 free-thaw cycles, much better than other samples. Scanning electron microscopy (SEM) and polarizing microscopy demonstrated that structures of starch granules were fully damaged after heat pretreatment at 90 °C. The reaction took place not only on the surface of starch granules, but also internally, leading to improvement in the grafting amounts and grafting efficiency by 42.86% and 39.03%, respectively. This was further confirmed by Fourier transform infrared spectroscopy (FT-IR), Confocal Raman microscopy (CRM) and X-ray photoelectron spectroscopy (XPS), which also showed better reaction homogeneity both between different starch granules and from granule surface to its internal structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 96, March 2017, Pages 11-18
Journal: International Journal of Biological Macromolecules - Volume 96, March 2017, Pages 11-18
نویسندگان
Xianyu Zheng, Li Cheng, Zhengbiao Gu, Yan Hong, Zhaofeng Li, Caiming Li,