Effects of Moisture Content and Heat Treatment on the Viscoelasticity and Gelation of Polyacrylonitrile/Dimethylsulfoxide Solutions

被引：0

作者：

Yang, Jae-Yeon ^{[1
]}

Kuk, Yun-Su ^{[1
]}

Kim, Byoung-Suhk ^{[2
]}

Seo, Min-Kang ^{[3
]}

机构：

[1] Korea Carbon Ind Promot Agcy KCARBON, Convergence Res Div, 110-11 Banryong Ro, Jeonju 54853, South Korea

[2] Jeonbuk Natl Univ, Dept Organ Mat & Text Engn, 567 Baekje Daero, Jeonju 54896, Jeonbuk, South Korea

[3] Korea Inst Convergence Text KICTEX, 594 Seodong ro, Iksan 54588, South Korea

来源：

GELS | 2024年 / 10卷 / 11期

关键词：

polyacrylonitrile; gelation; rheological properties; moisture content; carbon fibers; PHASE-SEPARATION; POLY(ACRYLONITRILE-CO-ITACONIC ACID); RHEOLOGICAL PROPERTIES; POLYACRYLONITRILE; BEHAVIOR; GEL; TEMPERATURE; PITCHES; DOPE;

D O I：

10.3390/gels10110728

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polyacrylonitrile (PAN) gels create significant obstacles in industrial fiber spinning by forming insoluble networks that compromise solution stability and uniformity. This study investigates the rheological properties of PAN/dimethyl sulfoxide (DMSO) solutions, examining how aging time, moisture content, and polymer concentration affect gelation behavior. Dynamic rheological analysis revealed that both physical and chemical crosslinks play crucial roles in gel formation, with gelation accelerating markedly when moisture content exceeds 3% and aging progresses. Under heat treatment at 80 degrees C, samples with increased moisture content demonstrated rapid transitions to solid-like states, indicating a critical moisture threshold for enhanced gelation kinetics. Additionally, reductions in polymer concentration disrupted physical crosslink density, thereby mitigating gel formation. These results underscore the importance of precisely controlling moisture and concentration parameters in PAN solutions to stabilize solution properties and minimize gel formation, thus enhancing process efficiency and quality in PAN-based carbon fiber production.

引用

页数：17

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