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Preparation and Properties of PPTA Composite Cellulose Fiber Paper
Received:April 05, 2024  
DOI：10.11980/j.issn.0254-508X.2024.11.015
Key Words:PPTA  cellulose fiber paper  coating  composite
Fund Project:国家自然科学基金项目（52073154）。
Author NameAffiliationPostcode
DONG Yanhui College of Materials Science and Engineering， Shenyang University of Chemical Technology， Shenyang， Liaoning Province， 110142 110142
WANG Yuanxia College of Materials Science and Engineering， Shenyang University of Chemical Technology， Shenyang， Liaoning Province， 110142 110142
ZHAO Min Department of Chemical Engineering， Key Lab of Advanced Materials （MOE）， Tsinghua University， Beijing， 100084 100084
TONG Jianwen College of Materials Science and Engineering， Shenyang University of Chemical Technology， Shenyang， Liaoning Province， 110142 110142
TUO Xinlin* Department of Chemical Engineering， Key Lab of Advanced Materials （MOE）， Tsinghua University， Beijing， 100084 100084
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Abstract:This paper presented an investigation into the process technology of poly（p-phenylene terephth amide）（PPTA）composite with cellulose fiber paper. The medium molecular weight PPTA was dissolved in DMPU/LiCl and formulated into a stable solution， which was then scraped onto the surface of ordinary cellulose fiber paper by the scraping method at a constant speed. The resulting gel coating was treated with a solidifying bath and subsequently dried to obtain PPTA-coated cellulose fiber paper. The introduction of PPTA surface coating resulted in an improvement in the denseness and continuity of the cellulose fiber paper surface， thereby facilitating a strong interaction with the cellulose fiber paper. The tensile strength of the composite paper increased significantly when the PPTA content was approximately 5.7%. The tensile strength of the cellulose fiber paper was 25.6 MPa， while that of the composite paper was 79.7 MPa，with a 211% increase. Similarly， the wet tensile strength increased from 0.134 kN/m to 0.731 kN/m，with a 446% increase. Additionally， the tear degree increased from 316.3 mN to 662.3 mN，with a 109% increase. Furthermore， the flame retardancy of the composite paper had increased significantly. It could self-extinguish within 3 when exposed to fire. Additionally， the electric breakdown strength of the composite paper was 20.9 kV/mm， which was an 90% increase compared to the original cellulose fiber paper.
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