静电纺丝-热压技术提高聚芳醚腈酮/功能化氮化硼复合材料的热导率,Journal of Applied Polymer Science

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静电纺丝-热压技术提高聚芳醚腈酮/功能化氮化硼复合材料的热导率
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2022-03-28 , DOI: 10.1002/app.52399
Yuanze Wang ₁ , Minjie Qu ₁ , Xinhong Wang ₁ , Guangyuan Zhou ₂

Affiliation

在这项研究中，通过溶液共混和静电纺丝技术制备了聚芳醚腈酮/功能化氮化硼（PEK-CN/f-BN）复合纤维。并通过热压法制备了导热PEK-CN/f-BN纳米复合材料。使用十八烷基三甲基溴化铵 (OTAB) 对氮化硼 (BN) 填料的表面进行功能化，将其用作导热填料来制造相应的 PEK-CN/BN 复合材料。PEK-CN/f-BN复合材料（25 wt% f-BN）的导热系数（λ）为0.702 W/mK，PEK-CN/BN复合材料（25 wt%未官能化BN）为0.649 W/ mK，其λ比λ高 200% 以上纯 PEK-CN (0.251 W/mK)。同时，与纯PEK-CN相比，PEK-CN/f-BN复合材料的玻璃化转变温度（Tg ）从_228.10 ℃提高到232.98℃，PEK-CN/f- BN 复合材料也得到了改进。还注意到，在理想的静电纺丝条件下，当 BN 和 f-BN 的含量为 25 wt% 时，储能模量 ( E ′)、损耗模量 ( E ″) 和介电损耗角正切 (tan δ ) PEK-CN/BN复合材料和PEK-CN/f-BN复合材料的值均高于纯PEK-CN。

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Enhanced thermal conductivity of poly(aryl ether nitrile ketone)/functionalized boron nitride composites by electrospinning–hot press technique

In this study, poly(aryl ether nitrile ketone)/functionalized boron nitride (PEK-CN/f-BN) composites fibers were prepared by solution blending followed by electrospinning technique. And the thermally conductive PEK-CN/f-BN nanocomposites were fabricated via hot press method. Octadecyltrimethylammonium Bromide (OTAB) was performed to functionalize the surface of boron nitride (BN) fillers, which were utilized as thermally conductive fillers to fabricate the corresponding PEK-CN/BN composites. The thermal conductivity coefficient (λ) of the PEK-CN/f-BN composites (25 wt% f-BN) was 0.702 W/mK, and the PEK-CN/BN composites (25 wt% unfunctionalized BN) was 0.649 W/mK, whose λ is more than 200% higher than the λ of pure PEK-CN (0.251 W/mK). Meantime, compared to the pure PEK-CN, the glass-transition temperature (T_g) of the PEK-CN/f-BN composites was increased from 228.10 to 232.98°C, and the thermal stability of the PEK-CN/f-BN composites has been improved as well. It was also noticed that, under the ideal electrospinning conditions, when the content of BN and f-BN attached to 25 wt%, the storage modulus (E′), loss modulus (E″), and dielectric loss tangent (tan δ) values of the PEK-CN/BN composites and PEK-CN/f-BN composites were higher than that of pure PEK-CN.

更新日期：2022-03-28

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