کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4999214 | 1460494 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simulating the protective role of bark proanthocyanidins in surface coatings: Unexpected beneficial photo-stabilisation of exposed timber surfaces
ترجمه فارسی عنوان
شبیه سازی نقش حفاظتی پروانتوسیانیدین های پوست در پوشش های سطحی: تثبیت عکس های سودمند از سطوح سطحی در معرض
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کلمات کلیدی
پروانتوسیانیدین، تانن فشرده، آنتی اکسیدان، افزودنی های پوشش
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Being multifunctional in planta, proanthocyanidins extractable from tree bark have been evaluated in vitro to provide a protective role to acrylic-based coating resins. These polyflavonoid compounds were assessed as radical and photo-oxidation inhibitors in both native form, and after chemical modification to provide lipophilic character and tailored antioxidant and UV absorption properties. On addition to acrylic and styrene-acrylic co-polymer coatings at typical additive levels (<0.5%) the proanthocyanidins do not inhibit coalescence and cure of the surface coating nor leach from the cured coating. Accelerated weathering and outdoor exposure of acrylic-coated timber revealed modified proanthocyanidins possessing high antioxidant activity were associated with greater coating longevity. Moreover, proanthocyanidins with a high degree of substitution also outperformed synthetic protective agents indicating the inherent UV absorption potential of these materials also contributed this efficacy within the acrylic and styrene-acrylic coating systems. Furthermore, this study has provided an unanticipated finding that the inherent UV absorption and degradation of proanthocyanidins may contribute to the photo-stabilisation and colour stability of the coated timber on weathering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 110, September 2017, Pages 55-61
Journal: Progress in Organic Coatings - Volume 110, September 2017, Pages 55-61
نویسندگان
Warren J. Grigsby,