Honeycomb porous regenerated cellulose aerogel films with enhanced thermal dissipation for agricultural mulch application

IF 3.5 2区 农林科学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
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Abstract

Agricultural films, essential to contemporary agricultural production, are mostly made from non-biodegradable petroleum-based materials. The use of such films, especially in high-temperature environments, contributes to elevated internal temperatures in direct sunlight, adversely affecting crop appearance and quality. In this work, rice straw was used as the raw material to prepare biodegradable chemically crosslinked regenerated cellulose aerogel films (RCAF-CC) by combining physical dissolution regeneration, chemical cross-linking, and freeze-drying. The resulting RCAF-CC is notable for its high middle-infrared emissivity and high solar reflectivity, which significantly aid in thermal dissipation for agricultural mulch by enhancing infrared radiation and solar reflection. Compared to traditional polyethylene films, RCAF-CC, with its superior radiative cooling properties and lower water vapor transport rate, has a significant advantage in the growth trend and survival rate of cherry radishes. It is worth noting that the RCAF-CC achieved the degradation rate of 74.4 % in the 100-day soil burial experiment, and the soybean seeds grown in the degraded soil grew well, showing excellent eco-friendliness. These results show that RCAF-CC can be an alternative source of traditional agricultural films, solving the problems of non-biodegradable and high internal temperatures of the films under direct sunlight.

用于农用地膜的蜂窝状多孔再生纤维素气凝胶薄膜具有更强的散热性能
农用薄膜是当代农业生产的必需品,大多由不可生物降解的石油基材料制成。使用这种薄膜,尤其是在高温环境中使用,会导致在阳光直射下内部温度升高,从而对作物的外观和质量产生不利影响。本研究以水稻秸秆为原料,通过物理溶解再生、化学交联和冷冻干燥等工艺制备了可生物降解的化学交联再生纤维素气凝胶薄膜(RCAF-CC)。生成的 RCAF-CC 具有显著的高中红外辐射率和高太阳反射率,通过增强红外辐射和太阳反射率,大大有助于农用地膜的散热。与传统的聚乙烯薄膜相比,RCAF-CC 具有优越的辐射冷却性能和较低的水蒸气迁移率,在樱桃萝卜的生长趋势和成活率方面具有显著优势。值得注意的是,在 100 天的土壤掩埋实验中,RCAF-CC 的降解率达到了 74.4%,在降解土壤中生长的大豆种子长势良好,表现出优异的生态友好性。这些结果表明,RCAF-CC 可以作为传统农膜的替代来源,解决农膜在阳光直射下不可降解和内部温度过高等问题。
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来源期刊
Food and Bioproducts Processing
Food and Bioproducts Processing 工程技术-工程:化工
CiteScore
9.70
自引率
4.30%
发文量
115
审稿时长
24 days
期刊介绍: Official Journal of the European Federation of Chemical Engineering: Part C FBP aims to be the principal international journal for publication of high quality, original papers in the branches of engineering and science dedicated to the safe processing of biological products. It is the only journal to exploit the synergy between biotechnology, bioprocessing and food engineering. Papers showing how research results can be used in engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in equipment or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of food and bioproducts processing. The journal has a strong emphasis on the interface between engineering and food or bioproducts. Papers that are not likely to be published are those: • Primarily concerned with food formulation • That use experimental design techniques to obtain response surfaces but gain little insight from them • That are empirical and ignore established mechanistic models, e.g., empirical drying curves • That are primarily concerned about sensory evaluation and colour • Concern the extraction, encapsulation and/or antioxidant activity of a specific biological material without providing insight that could be applied to a similar but different material, • Containing only chemical analyses of biological materials.
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