Enhanced thermal conductivity in immiscible polyimide blend composites with needle-shaped ZnO particles

Abstract

Novel composite films exhibiting high thermal conductivity along the out-of-plane direction were prepared from two types of immiscible polyimides (PIs) and needle-shaped ZnO particles.

Enhancement of Thermal Diffusivity in Phase-Separated Bismaleimide/Poly(ether imide) Composite Films Containing Needle-Shaped ZnO Particles

“…For comparison, the D⏊ values of the previously reported PI blend composite films (TF/SD) and homopolyimide (TF) films containing n-ZnO particles are also presented [3]. Firstly, the D⏊ values of BMI composite films (orange diamonds) are slightly higher than those of BPDA-TFDB (TF) composite films (green triangles).…”

“…Bismaleimide (BMI) was purchased from Tokyo Chemical Industry Co. Ltd. (Tokyo, Japan), N,N-dimethylacetamide (DMAc, anhydrous) was purchased from Sigma-Aldrich (St. Louis, MO, USA), and both were used as received. Needle-shaped zinc oxide (n-ZnO) particles were synthesized according to the literature [8], and the experimental details and the properties of the particles have been reported elsewhere [3]. FE-SEM micrographs of aggregated and individual n-ZnO particles are shown in Figure S1 (Supporting Information).…”

“…For comparison, the D 3 of 11 ylacetamide (DMAc, anhydrous) was purchased from Sigmaboth were used as received. Needle-shaped zinc oxide (n-ZnO) ing to the literature [8], and the experimental details and the n reported elsewhere [3]. FE-SEM micrographs of aggregated and hown in Figure S1 (Supporting Information).…”

“…Needle-shaped zinc oxide (n-ZnO) particles were synthesized according to the literature [8], and the experimental details and the properties of the particles have been reported elsewhere [3]. FE-SEM micrographs of aggregated and individual n-ZnO particles are shown in Figure S1 (Supporting Information).…”

“…The solid contents of BPADA-MPD and BPADA-MPD/BPADA-SDA were preset to 15 and t %, respectively. The PAA solutions containing 0-26 vol % of n-ZnO particles were prepared rding to literature [3,5]. The PAA solutions were casted onto glass substrates and thermally cured 0 °C for 1 h. An organic-solvent-soluble PI solution containing n-ZnO was prepared by stirring the mixed tion of n-ZnO particles dispersed in NMP and PI (BPADA-MPD) film dissolved in DMAc or P for 18 h. To prepare the mixture solution of BPADA-MPD and BMI, BMI was added to the DA-MPD solution and stirred for 4 h, in which the weight ratios of BPADA-MPD and BMI were o 25:75.…”