高结晶度氮化硼纳米片的制备及其与聚乙烯醇复合薄膜的性能

doi:10.15541/jim20180258

无机材料学报 ›› 2019, Vol. 34 ›› Issue (4): 401-406.DOI: 10.15541/jim20180258

高结晶度氮化硼纳米片的制备及其与聚乙烯醇复合薄膜的性能

耿仁杰^1,²,俄松峰²,李朝威²,李涛涛²,吴隽¹(),姚亚刚²()

^1. 武汉科技大学材料与冶金学院, 省部共建耐火材料与冶金国家重点实验室, 武汉 430081
^2. 中国科学院苏州纳米技术与纳米仿生研究所, 先进材料研究部, 苏州 215123

收稿日期:2018-06-08 修回日期:2018-08-27 出版日期:2019-04-20 网络出版日期:2019-04-15
作者简介:耿仁杰(1993-), 男, 硕士研究生. E-mail:rjgeng2016@sinano.ac.cn
基金资助:
国家自然科学基金重点项目(51522211);江苏省自然科学基金(20160399);中国科学院苏州纳米技术与仿生研究所纳米器件与应用重点实验室项目(15QT02)

High Crystallinity Boron Nitride Nanosheets: Preparation and the Property of BNNSs/Polyvinyl Alcohol Composite Film

Ren-Jie GENG^1,²,Song-Feng E²,Chao-Wei LI²,Tao-Tao LI²,Jun WU¹(),Ya-Gang YAO²()

^1. The State Key Laboratory of Refractories and Metallurgy, School of Material and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
^2. Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, China

Received:2018-06-08 Revised:2018-08-27 Published:2019-04-20 Online:2019-04-15
Supported by:
National Natural Science Foundation of China(51522211);Natural Science Foundation of Jiangsu Province(20160399);Project of Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences(15QT02)

摘要/Abstract

摘要：

以具有特殊花瓣状形貌的硼酸镁纳米片为模板、前驱体和硼源, 以氨气为氮源合成了氮化硼纳米片(BNNSs), 通过 SEM、TEM、XRD、Raman和FT-IR等对其形貌和结构等进行了分析。结果表明: 合成的BNNSs为厚度仅约5 nm、横向尺寸150~300 nm、结晶度极高的单晶片层状h-BN, 多个BNNSs聚集形成了形貌与硼酸镁纳米片类似的形状。以所合成的BNNSs为填料, 制备了不同BNNSs添加量的BNNSs/聚乙烯醇(PVA)复合材料薄膜, 结果表明添加30% BNNSs的复合薄膜的弹性模量较纯PVA薄膜提高了约39.8%, 面内热扩散系数和热导率则分别最大提高了约7和8倍, 说明以此BNNSs做为填料能明显改善BNNSs/PVA复合薄膜的热学性能。

关键词: 氮化硼纳米片, 模板, 高结晶度, 复合材料, 导热

Abstract:

A kind of hexagonal boron nitride nanosheets (BNNSs) with high crystallinity was synthesized using magnesium borate nanosheets with petal morphology as the template and boron source while ammonia as the nitride source. The morphology and structure of the BNNSs were analyzed by SEM, TEM, XRD, Raman, and FT-IR. The results show that the BNNSs are a kind of single crystalline h-BN with a thickness of about 5 nm and a diameter of 150-300 nm, respectively. The BNNSs aggregate together and inherit the petal shape of magnesium borate. Then, BNNSs/polyvinyl alcohol (PVA) composite films containing different content of BNNSs were prepared. The results show that elastic modulus of the film containing 30% BNNSs is 39.8% higher than that of pure PVA films, while the in-plane thermal diffusivity and thermal conductivity increase about 7 and 8 times, respectively, demonstrating the significant improvement to the thermal performance of PVA by adding this kind of BNNSs.

Key words: boron nitride nanosheets, template, high crystallinity, composite, thermal conductivity

中图分类号:

O611

耿仁杰, 俄松峰, 李朝威, 李涛涛, 吴隽, 姚亚刚. 高结晶度氮化硼纳米片的制备及其与聚乙烯醇复合薄膜的性能[J]. 无机材料学报, 2019, 34(4): 401-406.

Ren-Jie GENG, Song-Feng E, Chao-Wei LI, Tao-Tao LI, Jun WU, Ya-Gang YAO. High Crystallinity Boron Nitride Nanosheets: Preparation and the Property of BNNSs/Polyvinyl Alcohol Composite Film[J]. Journal of Inorganic Materials, 2019, 34(4): 401-406.

图/表 7

图1 硼酸镁纳米片的(a)高倍和(b)低倍SEM照片及(c) XRD图谱

Fig. 1 (a) High- and (b) low-magnification SEM images, and (c) XRD pattern of the magnesium borate nanosheets

图2 (a~b)高倍和(c~d)低倍的氮化硼纳米片的SEM照片

Fig. 2 (a-b) High- and (c-d) low-magnification SEM images of the BNNSs

图3 氮化硼纳米片的(a~c)TEM照片, (d~e)HR-TEM照片及(f)电子衍射花样

Fig. 3 (a-c) TEM images, (d-e) HR-TEM images, and (f) selected area electron diffraction pattern of the BNNSs

图4 氮化硼纳米片的(a)XRD图谱, (b)红外吸收光谱, (c)拉曼光谱和(d)紫外-可见吸收光谱

Fig. 4 (a) XRD pattern, (b) FT-IR spectrum, (c) Raman spectrum, and (d) UV-Vis spectrum of the BNNSs

图5 反应粗产物的XRD图谱

Fig. 5 XRD pattern of the crude products

图6 不同氮化硼含量(0、10wt%、20wt%和30wt%)的BNNSs/ PVA复合薄膜的弹性模量, 插图为BNNSs添加量为30wt%的BNNSs/PVA薄膜实物图

Fig. 6 Influence of the content of BNNSs on the elastic modulus of the BNNSs/PVA composite films with inset showing a picture of the composite film with 30wt% BNNSs

图7 不同氮化硼含量(0, 10wt%, 20wt%和30wt%)的BNNSs/ PVA复合薄膜的(a)面内和(b)面外热扩散系数(白色柱状图)和热导率(阴影柱状图)

Fig. 7 In-plane (a) and out-plane (b) thermal diffusivity (white histogram) and thermal conductivity (shadow bar graph) of BNNSs/PVA composite films with different filler contents (0, 10wt%, 20wt% and 30wt%)

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高结晶度氮化硼纳米片的制备及其与聚乙烯醇复合薄膜的性能

High Crystallinity Boron Nitride Nanosheets: Preparation and the Property of BNNSs/Polyvinyl Alcohol Composite Film

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