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用于导热和电绝缘聚合物复合材料的可设计核壳石墨颗粒。

Designable core-shell graphite particles for thermally conductive and electrically insulating polymer composites.

作者信息

Hirahara Takashi

机构信息

DuPont Kabushiki Kaisha, Transportation & Advanced Polymers 19-2 Kiyohara Kogyodanchi Utsunomiya-shi Tochigi 321-3231 Japan

出版信息

RSC Adv. 2018 May 8;8(30):16781-16787. doi: 10.1039/c8ra01946k. eCollection 2018 May 3.

DOI:10.1039/c8ra01946k
PMID:35540546
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9080288/
Abstract

Electrically insulating graphite particles were prepared by coating graphite with electrically insulating materials a two-step mechanical mixing process. Graphite particles were treated with a binder in the 1 mixing process and coated with an electrically insulating particle in the 2 mixing process under high shear forces within a short processing time (below 1 min). Micron-sized graphite particles were successfully coated with various inorganic particles of appropriate particle diameter. Talc and boron nitride exhibited good affinities with graphite and formed effective coating layers to render reliable electrical insulation. Graphite coated with talc and boron nitride exhibited a high volume resistivity, greater than 10 Ω cm. The insulating property was retained even after compounding and moulding the coated graphite particles with a polymer. The two-step coating process under high shear forces is a promising method for production of coated graphite particles.

摘要

通过用电气绝缘材料涂覆石墨，采用两步机械混合工艺制备了电绝缘石墨颗粒。在第一步混合过程中，石墨颗粒用粘结剂处理，在第二步混合过程中，在短处理时间（低于1分钟）内的高剪切力作用下，用电气绝缘颗粒进行涂覆。微米级石墨颗粒成功地被各种具有适当粒径的无机颗粒涂覆。滑石和氮化硼与石墨表现出良好的亲和力，并形成有效的涂层以提供可靠的电绝缘。涂有滑石和氮化硼的石墨表现出高体积电阻率，大于10Ω·cm。即使将涂覆的石墨颗粒与聚合物混合并模塑后，绝缘性能仍得以保留。高剪切力下的两步涂覆工艺是生产涂覆石墨颗粒的一种有前景的方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/7d13bc65de85/c8ra01946k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/7506e4542462/c8ra01946k-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/fdb24646393d/c8ra01946k-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/bdc28f563e8a/c8ra01946k-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/e23d4473c472/c8ra01946k-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/56b046581c28/c8ra01946k-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/1353dbceef35/c8ra01946k-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/478d8c584109/c8ra01946k-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/7d13bc65de85/c8ra01946k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/7506e4542462/c8ra01946k-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/fdb24646393d/c8ra01946k-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/bdc28f563e8a/c8ra01946k-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/e23d4473c472/c8ra01946k-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/56b046581c28/c8ra01946k-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/1353dbceef35/c8ra01946k-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/478d8c584109/c8ra01946k-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/814b/9080288/7d13bc65de85/c8ra01946k-f7.jpg

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