南通大学学报（自然科学版）2024，Vol.23Issue(2)：12-20,9.DOI:10.12194/j.ntu.20240412001
微晶纤维素-热塑性聚氨酯核壳结构气凝胶纤维的制备及性能
Preparation and properties of microcrystalline cellulose-thermoplastic polyurethane core-shell structured aerogel fibres
摘要
Abstract
To enhance the mechanical strength and thermal insulation properties of aerogel fibers,microcrystalline cellulose(MCC)and thermoplastic polyurethane(TPU)are employed in coaxial wet spinning.Through solvent exchange and freeze-drying,aerogel fibers with a porous MCC aerogel core layer enveloped by a TPU shell layer are prepared.The morphology,chemical crystalline structure,thermal stability,mechanical properties,and thermal insulation performance of the MCC-TPU aerogel fibers(MTAFs)are systematically analyzed and evaluated.The results demonstrate that upon dissolution and regeneration into MCC aerogel fibers,the crystalline structure of MCC transitions from cellulose Ⅰ to cellulose Ⅱ.The MTAFs exhibit a hierarchical porous structure comprising both mesopores and micropores,with a density of 0.169 g/cm3,a specific surface area of 6.460 m2/g,and an average pore diameter of 17.005 nm.When the mass fraction of MCC is 1.5％and that of TPU is 25％,the MTAFs exhibit optimal tensile properties,with a tensile strength of 2.32 MPa and an elongation at break of 567.47％.These values represent an increase of 246％and 11 027％,respectively,compared to MTAFs with an MCC mass fraction of 3.0％and a TPU mass fraction of 0％.These fibers can be woven into textiles,showcasing excellent mechanical properties and flexibility.The incorporation of TPU enhances the overall thermal stability of the aerogel fibers.The MTAFs achieve a maximum temperature differential of up to 22.48 ℃ with the heating stage,exhibit an overall infrared emissivity below 0.5,and effectively reduce thermal radiation.These attributes make them highly promising for applications in high-performance thermal insulation textiles.关键词
微晶纤维素/气凝胶纤维/核壳结构/机械性能/保温隔热Key words
microcrystalline cellulose/aerogel fiber/core-shell structure/mechanical properties/thermal insulation分类
化学化工引用本文复制引用
王庭丽,宋理阳,臧雪妍,张子诺,祁冠杰,李成辰,陈坤林,王潮霞..微晶纤维素-热塑性聚氨酯核壳结构气凝胶纤维的制备及性能[J].南通大学学报（自然科学版）,2024,23(2):12-20,9.基金项目
国家级大学生创新创业训练计划项目(202310295167Y) （202310295167Y）
