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Effects of Lipase and Xylanase Pretreatment on the Structure and Pulping Properties of Wheat Straw

Polymers, 2022-11, Vol.14 (23), p.5129 [Peer Reviewed Journal]

COPYRIGHT 2022 MDPI AG ;2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2022 by the authors. 2022 ;ISSN: 2073-4360 ;EISSN: 2073-4360 ;DOI: 10.3390/polym14235129 ;PMID: 36501524

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  • Title:
    Effects of Lipase and Xylanase Pretreatment on the Structure and Pulping Properties of Wheat Straw
  • Author: Jia, Qianqian ; Chen, Jiachuan ; Yang, Guihua ; Liu, Kefeng ; Wang, Yueying ; Zhang, Kai
  • Subjects: alkali-oxygen pulping ; bio-enzyme pretreatment ; Carbohydrates ; Energy consumption ; Enzymes ; Fatty acids ; Fourier transforms ; Lignin ; Lignocellulose ; Lipase ; Morphology ; Oxygen ; Phenolphthalein ; Pretreatment ; pulp properties ; Pulping ; Raw materials ; Reagents ; Scanning electron microscopy ; Spectrum analysis ; Straw ; structure ; Supply and demand ; Tensile strength ; Triglycerides ; Wheat ; wheat straw ; Xylanase
  • Is Part Of: Polymers, 2022-11, Vol.14 (23), p.5129
  • Description: Based on the reduction of environmental pollution, a biological enzyme assisted alkali-oxygen pulping method was explored to improve the delignification efficiency and fiber accessibility of wheat straw and improve the properties of wheat straw pulp. In this paper, lipase and xylanase were used to pretreat wheat straw and the effects of different enzyme types and enzyme dosage on the microstructure and pulp properties of wheat straw were investigated and experimented. The results showed that the lipase can remove fat and wax on the surface of wheat straw, while xylanase degraded the hemicellulose components, such as xylan, of wheat straw fiber, destroyed the structure of the lignin-carbohydrate complex, increasing lignin removal as a result and enhancing the impregnating, diffusion and penetration of alkali. Compared with wheat straw without enzyme pretreatment, the skeleton of wheat straw pretreated by enzyme became looser, the internal cavity appeared and the wall cavity became thin and transparent. The fines decreased obviously and the length of fibers increased. After combined pretreatment with lipase (15 U·g ) and xylanase (15 U·g ), the pulping performance of wheat straw was improved and the tensile index (97.37 N·m·g ), brightness (40.9% ISO) and yield (58.10%) of the pulp increased by 12.9%, 19.9% and 9.9%, respectively. It can be seen that enzyme pretreatment is a green and effective approach to improving the alkali-oxygen pulping performance of wheat straw.
  • Publisher: Switzerland: MDPI AG
  • Language: English
  • Identifier: ISSN: 2073-4360
    EISSN: 2073-4360
    DOI: 10.3390/polym14235129
    PMID: 36501524
  • Source: GFMER Free Medical Journals
    PubMed Central
    ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
    DOAJ Directory of Open Access Journals
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