制造木质纤维素薄膜作为潜在的生物基塑料†

Antonella Rozaria Nefeli Pontillo, Sirui Chen, Diego Freire Ordóñez, Niall Mac Dowell, Koon-Yang Lee and Tom Welton
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引用次数: 0

摘要

用环境可持续和经济可行的工艺取代石油基塑料包装是朝着取代石油作为石化原料的目标迈出的重要一步。本文报道了利用可回收离子液体制备仅由纤维素和木质素组成的薄膜。用DMSO作为助溶剂,降低了木质素溶液的粘度,促进了木质素的溶解。膜的抗拉强度在65.44 ~ 93.15 MPa之间,与商用膜相当,但木质素的存在增加了涂料溶液的粘度,增加了紫外线对膜的阻塞,降低了膜的润湿性,水接触角增加至48.6%。薄膜在各种溶剂中都是稳定的,当浸入水溶液时,薄膜会膨胀,质量会翻倍。该研究还证实,离子液体可以在不影响其化学成分和热稳定性的情况下回收和重复使用至少五个循环。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fabricating lignocellulosic films as potential biobased plastics†

Replacing petroleum based plastic packaging with an environmentally sustainable and economically viable process is an important step towards the goal of displacing oil as a petrochemical feedstock. Here we report the preparation of thin films consisting only of cellulose and lignin, using a recyclable ionic liquid. A co-solvent, DMSO, was used to decrease the viscosity of the dope solutions and facilitate the dissolution of the lignin. The films exhibit high mechanical properties with the tensile strength ranging between 65.44 and 93.15 MPa, comparable to those of commercial counterparts, while the presence of lignin increases the viscosity of the dope solutions, adds UV blockage to the films and decreases the wettability of the films with the water contact angle increasing up to 48.6%. The films are stable in various solvents and when immersed in aqueous solutions can swell and double in mass. The research also confirms that the ionic liquid can be retrieved and reused for at least five cycles without hindering its chemical composition and thermal stability.

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