摘要
为制备低成本、高导热系数的凉感纤维用切片,以硅烷偶联剂乙烯基三甲氧基硅烷(A171)对云母(Mica)、氮化铝(AlN)粉体进行表面处理,再通过熔融共混对高密度聚乙烯(HDPE)进行改性,制备得到改性聚乙烯切片。采用纳米粒度仪对表面处理前后的Mica、AlN粉体的粒径分布进行分析,通过热重分析仪、示差扫描量热仪、热台偏光显微镜和导热系数仪对改性HDPE切片的热稳定性、结晶度、结晶形态和导热性能进行表征。结果表明:经A171表面处理后,Mica粉体的平均粒径由460 nm变为380 nm, AlN粉体的平均粒径由280 nm变为230 nm,粉体的平均粒径减小,粒径分布变窄;当添加2.0%复配粉体后,HDPE的热稳定性增加,结晶度由64.5%提升至76.5%,球晶尺寸减小,导热系数由0.290 W/(m·K)提升至0.424 W/(m·K)。该结果可为凉感纤维用切片的产业化提供参考。
In order to fabricate slices for cooling fibers with low cost and high thermal conductivity, modified polyethylene slices were prepared through surface treatment by Mica and AlN powder with silane coupling agent vinyl trimethoxysilane(A171), followed by modification of high density polyethylene(HDPE) by melt blending. The particle size distributions of the modified Mica and AlN powder were analyzed by a nano particle size analyzer. The thermal stability, crystallinity, crystal morphology and thermal conductivity of the modified HDPE slices were characterized by thermogravimetric analyzer, differential scanning calorimeter, hot stage polarizing microscope, and thermal conductivity tester. The results showed that the average particle sizes of the powder decreased(from 460 nm to 380 nm for Mica powder, and from 280 nm to 230 nm for AlN powder) and the particle size distributions became narrower after surface treatment with A171. With the addition of 2.0% compound powder, the thermal stability of HDPE grew and the crystallinity rose from 64.5% to 76.5%, the spherulite size decreased, and the thermal conductivity grew from 0.290 W/(m·K) to 0.424 W/(m·K). The results obtained in this study provide a reference for the industrialization of slices for cooling fiber.
作者
黄宜坤
翁鸣
陈红伟
郭静雯
李蓉
王秀华
HUANG Yikun;WENG Ming;CHEN Hongwei;GUO Jingwen;LI Rong;WANG Xiuhua(National Engineering Lab for Textile Fiber Materials and Processing Technology,Zhejiang Sci-Tech University,Hangzhou 310018,China;Zhejiang Guxiandao Incorporated Company,Shaoxing 312030,China)
出处
《浙江理工大学学报（自然科学版）》
2023年第1期1-8,共8页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
浙江省公益技术应用研究计划项目(LGG21E030012)。
关键词
高密度聚乙烯
云母
氮化铝
共混改性
结晶度
导热性能
high density polyethylene
Mica
aluminum nitride
blend modification
crystallinity
thermal conductivity
