| 氮化硼表面修饰及其对氮化硼/硅橡胶复合材料热性能的影响 |
| Surface modification of BN and its influence on thermal properties of BN/silicone rubber composite |
| 投稿时间：2015-11-26 修订日期：2015-11-26 |
| DOI： |
| 中文关键词: 硅胶,氮化硼,偶联剂,导热系数,热稳定性 |
| 英文关键词: boron nitride coupling agents thermal conductivity thermal stability |
| 基金项目: |
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| 中文摘要: |
| 对氮化硼表面依次进行活化、偶联剂接枝的表面处理,并采用双行星真空搅拌机制备了BN/SiR复合材料。研究了活化与偶联剂处理工艺对BN表面官能团、接枝量的影响,BN改性对界面相容性、导热系数以及热稳定性的影响,本文通过X射线光电子能谱分析了活化前后氮化硼表面官能团的含量对比,红外光谱分析偶联剂的改性效果,热重分析仪表征氮化硼接枝量与复合材料热稳定性,原子力显微镜粘附力分析表征改性前后氮化硼与硅胶界面亲和性,导热仪分析了不同复合材料导热性能。结果表明,活化使得氮化硼表面羟基增多,活化后的氮化硼表面偶联剂接枝量有一定提升,偶联剂CA1改性氮化硼的效果比偶联剂KH570好,改性提高BN与硅胶界面亲和性,随BN用量增加、活化工艺、表面接枝量都会对导热系数有一定的影响。 |
| 英文摘要: |
| Hexagonal boron nitride (h-BN) nanosheet is a novel high thermal conductivity and high aspect ratio filler that has the potential to substantially enhance the thermal conductivity of polymer composites.In order to increase the dispersion of BN in the matrix,the surface treatment of BN were coated by a silane coupling agent.Firstly increase the amount of surface functional groups of BN through activating the surface of boron nitride,then treat the surface of BN with a coupling agent .BN / SiR composites is prepared using a double planetary vacuum mixer.In this article,the activating and grafting of BN were studied,the influences of process to surface modification of BN was also investigated.Results showed that modification process and the surface of the graft have a great impact on BN. the surface of BN also affect thermal properties of composites, |
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