The Key Laboratory of Leather Chemistry and Engineering of the Ministry of Education, Sichuan University, Chengdu 610065, China.
The Key Laboratory of Leather Chemistry and Engineering of the Ministry of Education, Sichuan University, Chengdu 610065, China.
Carbohydr Polym. 2021 Mar 1;255:117340. doi: 10.1016/j.carbpol.2020.117340. Epub 2020 Nov 2.
The effective utilization of bamboo industrial waste to produce value-added products is an important subject. In this paper, a multifunctional biobased cryogel derived from bamboo industrial waste was successfully developed. Bamboo fibres were first extracted from bamboo industrial waste and then dispersed in the gelatin solution to produce bamboo fibres/gelatin cryogels (BFs/G cryogels) by a freeze-drying process. The hydrophobicities of BFs/G cryogels were further improved by modification with methyltrichlorosilane. The prepared BFs/G cryogels possessed low density (23.9-29.5 mg/cm), high porosity (90.41-95.85%), low thermal conductivity (0.031‒0.047 W/m·K) and excellent sound-insulating performance. The presence of rigid bamboo fibres improved the mechanical performance of the BFs/G cryogel. Furthermore, the BFs/G cryogels exhibited high oil absorption capacities of 23-66 times that of their dry weights. The successful development of this cryogel provides a path for the efficient utilization of bamboo industrial waste as a renewable biomass resource.
有效利用竹产业废弃物来生产附加值产品是一个重要的课题。本文成功开发了一种源自竹产业废弃物的多功能生物基 cryogel。首先从竹产业废弃物中提取竹纤维，然后通过冷冻干燥工艺将其分散在明胶溶液中，制备出竹纤维/明胶 cryogel（BFs/G cryogels）。通过三甲基氯硅烷改性进一步提高了 BFs/G cryogels 的疏水性。所制备的 BFs/G cryogels 具有低密度（23.9-29.5 mg/cm）、高孔隙率（90.41-95.85%）、低热导率（0.031-0.047 W/m·K）和优异的隔音性能。刚性竹纤维的存在提高了 BFs/G cryogel 的机械性能。此外，BFs/G cryogels 表现出 23-66 倍于其干重的高吸油能力。这种 cryogel 的成功开发为有效利用竹产业废弃物作为可再生生物质资源提供了一条途径。
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