Combined Chemical Modification of Bamboo Material Prepared Using Vinyl Acetate and Methyl Methacrylate: Dimensional Stability, Chemical Structure, and Dynamic Mechanical Properties
作者： Saisai Huang , Qiufang Jiang , Bin Yu , Yujing Nie , Zhongqing Ma
关键词:
摘要: Acetylation and in situ polymerization are two typical chemical modifications that used to improve the dimensional stability of bamboo. In this work, combination modification vinyl acetate (VA) acetylation methyl methacrylate (MMA) bamboo was employed. Performances treated were evaluated terms stability, wettability, thermal structure, dynamic mechanical properties. Results show performances (dimensional wettability) prepared via combined pretreatment VA MMA (VA/MMA-B) better than those raw bamboo, single-treated (VA-B), (MMA-B). According scanning electron microscopy (SEM) Fourier transform infrared spectroscopy (FTIR) analyses, mainly grafted onto surface cell wall or lumen. The antiswelling efficiency contact angle VA/MMA-B increased maximum values 40.71% 107.1°, respectively. From thermogravimetric analysis (TG/DTG curves), highest onset decomposition temperature (277 °C) observed VA/MMA-B. DMA analysis, storage modulus (E’) sharply from 15,057 Pa (untreated bamboo) 17,909 (single-treated bamboo), glass transition improved 180 °C (raw 205 bamboo).
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