Abstract

Cellulose cryogels crosslinked with epichlorohydrin (ECH) were successfully developed from kenaf core biomass via green urea/alkaline solvent system. The effect of ECH concentration (from 3 to 9 wt%) on the pore structure, density, morphology, thermal stability, mechanical properties, water absorption performance and acoustic insulation of cellulose cryogels were studied. It was found that the introduction of ECH affected the porosity and pore volume as well as density and water absorption of cryogels. The increase percentage of ECH has delayed the thermal decomposition of the cellulose cryogels thereby improving their thermal stability. Moreover, the compress stress and the sound absorption coefficient of the cellulose cryogels were enhanced significantly by about 50% and 27%, respectively. This work provides a facile approach to produce cost-effective biomass-derived cellulose cryogels with improved mechanical and thermal stability properties as well as acoustic insulation for preliminary studies of industrial applications.

中文翻译：

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交联对生物质纤维素冰晶的热机械，隔音和吸水性能的影响

摘要

通过绿色尿素/碱性溶剂系统成功地从洋麻核心生物质中成功开发了与表氯醇（ECH）交联的纤维素冷凝胶。研究了ECH浓度（3〜9 wt％）对纤维素凝胶的孔结构，密度，形貌，热稳定性，机械性能，吸水性能和隔音性能的影响。已经发现，ECH的引入影响了冰凝胶的孔隙率和孔体积以及密度和吸水率。ECH百分比的增加延迟了纤维素冰晶的热分解，从而提高了其热稳定性。此外，纤维素冰凝胶的压缩应力和吸声系数分别显着提高了约50％和27％。