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Study on the Enhanced Properties of Solvent Impregnated Meta-aramid Paper
Received:October 12, 2021  
DOI：10.11980/j.issn.0254-508X.2022.04.007
Key Words:solvent impregnation  swelling and dissolving  structural regeneration  slightly soluble meta-aramid paper  mechanical properties
Fund Project:国家重点研发计划（2017YFB0308300）；中国博士后基金面上项目（2020M673477）；陕西省自然基金（2020JQ-707）；国家自然基金青年项目（51903142）。
Author NameAffiliationPostcode
LI Fangfang College of Bioresources Chemical and Materials Engineering， China National Light Industry Key Lab of Paper-based Functional Materials， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
ZHANG Meiyun College of Bioresources Chemical and Materials Engineering， China National Light Industry Key Lab of Paper-based Functional Materials， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
TAN Jiaojun* College of Bioresources Chemical and Materials Engineering， China National Light Industry Key Lab of Paper-based Functional Materials， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
LUO Yanwei College of Bioresources Chemical and Materials Engineering， China National Light Industry Key Lab of Paper-based Functional Materials， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
RUAN Shaowei College of Bioresources Chemical and Materials Engineering， China National Light Industry Key Lab of Paper-based Functional Materials， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:In this study， it was proposed to use the solvent to swell and partially dissolve the aramid fiber to endow the aramid molecular chain with the ability to move and inter-diffusion， and further improve the compactness and interfacial bonding strength of the meta-aramid paper. The meta-aramid fiber base paper was impregnated to make aramid fibers swelled and dissolved， using dichloromethane （DCM）， dimethyl sulfoxide （DMSO）， N，N-dimethylformamide（DMF）， N，N-dimethylacetamide（DMAc） and DMAc solution containing 3% polyetherimide （PEI）， respectively. Then， the slightly soluble meta-aramid paper was obtained after regenerating by washing with water and removing solvent. The results showed that the solvent impregnation treatment could obtain denser paper structure and higher mechanical properties without causing any changes in chemical structure. Compared with the base paper， the modulus of the impregnated paper was increased by 2 to 3 times， and the tensile strength was increased by 7 to 9 times.
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