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Biological fermentation pretreatment accelerated the depolymerization of straw fiber and its mechanical properties as raw material for mulch film

文献类型： 外文期刊

作者： Sun, Enhui 1 ; Zhang, Yue 1 ; Yong, Cheng 1 ; Qu, Ping 1 ; Huang, Hongying 1 ; Xu, Yueding 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, 50 Zhongling St, Nanjing 210014, Jiangsu, Peoples R China

2.Jiangsu Collaborat Innovat Ctr Solid Organ Waste, Nanjing 210014, Jiangsu, Peoples R China

3.Minist Agr, Key Lab Crop & Livestock Integrated Farming, Nanjing 210014, Jiangsu, Peoples R China

4.Nanjing Univ Sci & Technol, Inst Chem Engn, Nanjing 210094, Peoples R China

关键词： Straw; Microbial fermentation; Biological deconstruction; Fiber depolymerization; Straw-fiber mulch films

期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：9.297； 五年影响因子：9.444 ）

ISSN： 0959-6526

年卷期： 2021 年 284 卷

页码：

收录情况： SCI

摘要： In order to reduce the negative ecological effects and environmental pollution caused by large-scale herbicide application in rice cultivation, a straw fiber mulch film (FMF) was developed. This study applied high-temperature enzymatic solution technology as a pretreatment process for rice straw (RS) fibers, causing beneficial physicochemical structural changes. Chemical composition, crystallinity index (CrI), degree of polymerization (DP), thermal stability, and other parameters of deconstructed RS fibers were analyzed. The change in Cr1 showed that appropriate pretreatment times can improve crystallinity, while excessively long pretreatment times caused crystallinity to sharply decrease from 44.65 wt% to 41.34 wt%. The C=O bonds between lignin and hemicellulose were almost completely destroyed, confirming the deconstruction of linkages within RS fibers, making the material significantly softer and looser. Compared with untreated straw fibers, the mechanical pulping beating time decreased significantly, reducing energy consumption by 43.75%. The FMFs prepared with appropriate fermenting times exhibited improved mechanical properties. The tensile strength of FMF prepared using biological pretreatment fermentation (BPF) as a raw material increased from 11.26 N m g(-1) to 15.68 N m g(-1), exhibiting an increase of 39.25% compared to traditional fermentation (TF). This work provides a novel method, which has the potential to effectively control herbicides and support the development of sustainable agricultural systems. (C) 2020 Elsevier Ltd. All rights reserved.

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