对甲苯磺酸预处理对纳米纤维素膜性能的影响

朱家添; 张志伟; 冯成启; 罗雅丹; 李娇; 刘宝杰; 覃程荣; 姚双全

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Effect of p-Toluenesulfonic Acid Pretreatment on Properties of Nanocellulose Film

Received:August 29, 2022

DOI：10.11981/j.issn.1000-6842.2022.04.75

Key Words:p-toluenesulfonic acid;lignin;cellulose nanofibril

Fund Project:国家自然科学基金（22168007）；广西自然科学基金（2022GXNSFAA035466）。

Author Name	Affiliation	Postcode
ZHU Jiatian^*	School of Light Industrial and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004	530004
ZHANG Zhiwei	School of Light Industrial and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004	530004
FENG Chengqi	School of Light Industrial and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004	530004
LUO Yadan	School of Light Industrial and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004	530004
LI Jiao	School of Light Industrial and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004	530004
LIU Baojie	School of Light Industrial and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004	530004
QIN Chengrong	School of Light Industrial and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004	530004
YAO Shuangquan	School of Light Industrial and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004	530004

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Abstract:

Hemicellulose and lignin in bagasse were selectively separated by two-step p-toluenesulfonic acid （p-TsOH） pretreatment. The residual solids from p-TsOH pretreatment and bleached bagasse pulp were homogenized at high pressure to prepare cellulose nanofibril with and without lignin （LCNF and BCNF）. LCNF and BCNF were further treated with vacuum filtration and hot pressing （T） to prepare different CNF films （LCNF film， BCNF film， T-LCNF film， and T-BCNF film）. The results show that the residual lignin after p-TsOH pretreatment is conducive to the preparation and dispersion of CNF and can improve water filtration performance of CNF， rendering a great improvement in film formation of CNF. In addition， the residual lignin significantly improves the hydrophobicity of CNF films but has a certain hindrance to its mechanical properties. However， lignin can be hot-melted and redistributed through hot pressing， and the structure of CNF films thusly changes， so that the tensile strength of the CNF film significantly increases to 166.7 MPa and the film possesses excellent hydrophobicity.

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