کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5022126 1469477 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
PLA toughened by bamboo cellulose nanowhiskers: Role of silane compatibilization on the PLA bionanocomposite properties
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
PLA toughened by bamboo cellulose nanowhiskers: Role of silane compatibilization on the PLA bionanocomposite properties
چکیده انگلیسی
To toughen brittle poly(lactic acid) (PLA) composites, surface-modified bamboo cellulose nanowhiskers (BCNW) were introduced into a PLA matrix. The BCNW was treated with (3-mercaptopropyl)trimethoxysilane (A-189) at five concentrations between 1 wt% to 16 wt% to improve compatibility. Silylated BCNW-toughened PLA composite films were further fabricated by solution casting. The coupled reaction between A-189 and cellulose via Si-O-C bonding and hydrogen bonding was confirmed. BCNW was silylated uniformly and maintained its original morphology. With increasing concentration, BCNW became smooth; however, with excessive coupling agent, the BCNW surface became rough. Elongation at break was inversely proportional to tensile strength and tensile modulus. Elongation at break increased to 250.8% after the 4 wt% A-189 treatment compared to 12.35% with untreated composites. The C/O ratio of BCNW decreased after coupling agent treatment. There were physical interlocks and hydrogen bonding between two phases. A wire-drawing phenomenon was observed on the tensile fractural surface. The thermal degradation stability decreased with the increasing treatment concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 148, 18 August 2017, Pages 59-69
نویسندگان
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