Ca<sup>2+</sup>交联羧基化麦草秸秆化机浆的制备及性能研究

杨伟凯; 陈昱文; 张宗威; 杨嘉玮; 李建国; 陈礼辉

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Study on Preparation and Properties of Ca²⁺-Crosslinked Carboxylated Wheat Straw Chemi-mechanical Pulp

Received:August 07, 2022

DOI：10.11981/j.issn.1000-6842.2023.02.69

Key Words:wheat straw chemi-mechanical pulp;carboxylated fibers;Ca²⁺ crosslinking;strength properties

Fund Project:国家重点研发计划（2019YFC1905903）；国家自然科学基金（31700520， 31971612）。

Author Name	Affiliation	Postcode
YANG Weikai^*	College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials， Fuzhou， Fujian Province， 350108	350108
CHEN Yuwen	College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials， Fuzhou， Fujian Province， 350108	350108
ZHANG Zongwei	College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials， Fuzhou， Fujian Province， 350108	350108
YANG Jiawei	College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials， Fuzhou， Fujian Province， 350108	350108
LI Jianguo	College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials， Fuzhou， Fujian Province， 350108	350108
CHEN Lihui	College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials， Fuzhou， Fujian Province， 350108	350108

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Abstract:

In this study， TEMPO oxidation was used to transform the hydroxyl group at C6 position of wheat straw pulp （SP） cellulose into carboxyl group to prepare carboxylated wheat straw pulp （CSP）. Ca²⁺ crosslinked carboxylated wheat straw pulp （CSP@Ca²⁺） was prepared by crosslinking CSP with Ca²⁺， and its strength properties were explored. The carboxyl/carbonyl groups of CSP fibers were determined by using FT-IR and XPS： the carboxyl group content of CSP carboxylated for 1 h （CSP1） was 0.27 mmol/g and its Zeta potential varied from -21.71 to -29.2 mV， which provided reactive sites for Ca²⁺ crosslinking. Compared with SP， tensile， burst， and tear indexes of CSP1@Ca²⁺0.5 improved by 154.4%， 170.8%， and 12.9%， respectively. Tensile， burst， and tear indexes of the mixed CSP@Ca²⁺0.5/SP （50∶50） paper were 27.1 N·m/g， 2.28 kPa·m²/g， and 3.68 mN·m²/g， increased by 83.4%， 115.1% and 8.3%， respectively， compared with SP.

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