Synthesis and Characterization of Xylan Grafted with Polyethylene Glycol in Ionic Liquid and Their Use as Moisture-Absorption/Retention Biomaterials

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• 作者：Xueqin Zhang ; Huihui Wang ; Xiaoxiang Wen ; Aiping Zhang ; Xiaoying Wang ; Linxin Zhong ; Chuanfu Liu and Runcang Sun
• 关键词：grafting ; ionic liquid ; moisture-absorption/retention ; polyethylene glycol ; xylan
• 刊名：Macromolecular Materials and Engineering
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：301
• 期：3
• 页码：287-295
• 全文大小：2031K
• ISSN：1439-2054

文摘

The objective of this study is to broaden the application of xylan as moisture-absorption/retention biomaterials by grafting polyethylene glycol (PEG) on xylan backbone. Ionic liquid 1-allyl-3-methylimidazolium chloride ([Amim]Cl) and 4,4-diphenylmethane diisocyanate are used as reaction media and coupling reagent, respectively. FT-IR, ¹H-NMR, and gel permeation chromatography analyses indicate the successful occurrence of the grafting reaction. Thermogravimetric analysis/derivative thermogravimetry indicates that the thermal stability of xylan increases after the grafting of the PEG side chains. With an increase of the degree of substitution of xylan-g-PEG, the molecular weight (M_w) of PEG side chains (1000 and 5000 g mol⁻¹), and the relative humidity of environment, the moisture-absorption/retention ratio of xylan-g-PEG increases. To evaluate the biodegradability/biocompatibility of this promising material, the ratio of biochemical oxygen demand to chemical oxygen demand of xylan-g-PEG and the cytotoxicity are tested on the samples. The results indicate that PEG-modified xylan has great potential as moisture-absorption/retention biomaterials.