CN116855073A - 一种六方氮化硼导热复合膜制备工艺和泡棉结构 - Google Patents

一种六方氮化硼导热复合膜制备工艺和泡棉结构 Download PDF

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CN116855073A
CN116855073A CN202310447475.4A CN202310447475A CN116855073A CN 116855073 A CN116855073 A CN 116855073A CN 202310447475 A CN202310447475 A CN 202310447475A CN 116855073 A CN116855073 A CN 116855073A
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boron nitride
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张东琴
陈先峰
衡先梅
王岩
陈兵
傅羿宁
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Longyang Electronics Kunshan Co ltd
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Abstract

本发明公开了一种六方氮化硼导热复合膜制备工艺,包括如下步骤:(1)制取功能化氮化硼分散液;(2)制取氮化硼量子点溶液;(3)制取聚合物基体溶液;(4)将流程(1)所得到的功能化氮化硼纳米片分散液、流程(2)所得到的氮化硼量子点溶液和流程(3)中所得到的聚合物基体溶液按照相应的质量比进行混合,在搅拌后超声即可获得氮化硼量子点/功能化氮化硼/聚合物基体混合液;(5)将流程(4)所得到的氮化硼量子点/功能化氮化硼/聚合物基体混合液放置于真空烘箱中,在抽真空脱气后取出混合液并把它倒进模具中,最后再放置于真空烘箱中进行真空干燥即可获得六方氮化硼复合膜,将本发明的六方氮化硼复合膜通过热熔胶贴附到泡棉上,具有优异的绝缘性和导热性。

Description

一种六方氮化硼导热复合膜制备工艺和泡棉结构
技术领域
本发明涉及模切技术领域,尤其涉及一种六方氮化硼导热复合膜制备工艺和泡棉结构。
背景技术
随着电子信息产业成为GDP增长的主要带动产业,电子产品的市场越来越大,例如笔记本电脑、大型液晶显示器、大功率电源等,对于这些电子产品而言,良好的散热是保障其正常连续工作的一个重要因素,而散热大多会运用到泡棉产品。
目前,导热弹性体行业内采用石墨包裹PU泡棉达到具有回弹性的导热泡棉,由于石墨是非绝缘体,所以要在石墨的外层包裹一层PI膜使其达到表面绝缘功效,该种泡棉结构比较复杂,导热性及绝缘效果也相对一般,为了解决该不足,所以本发明公开了一种六方氮化硼导热复合膜制备工艺和泡棉结构。
发明内容
为克服现有技术的不足,本发明公开了一种六方氮化硼导热复合膜制备工艺和泡棉结构。
为实现上述目的,本发明通过以下技术方案实现:一种六方氮化硼导热复合膜制备工艺,包括如下步骤:
(1)制取功能化氮化硼分散液:将六方氮化硼(h-bn)与尿素按照1:20的质量比混合后进行研磨,将研磨过后的氮化硼粉末过滤后分散到二甲基甲酰胺(dfm)中,在超声分散后获得氮化硼纳米片分散液;最后将氮化硼纳米片分散液进行溶剂热反应,反应过后形成的下层分散液即为功能化氮化硼分散液;
(2)制取氮化硼量子点溶液:对流程(1)溶液热反应之后的上层溶液进行离心,过滤离心之后的上层溶液即可获得氮化硼量子点溶液;
(3)制取聚合物基体溶液:将聚合物基体聚酰亚胺投入到二甲基甲酰胺中,搅拌后即可获得聚合物基体溶液;
(4)将流程(1)所得到的功能化氮化硼纳米片分散液、流程(2)所得到的氮化硼量子点溶液和流程(3)中所得到的聚合物基体溶液按照相应的质量比进行混合,在搅拌后超声即可获得氮化硼量子点/功能化氮化硼/聚合物基体混合液;
(5)将流程(4)所得到的氮化硼量子点/功能化氮化硼/聚合物基体混合液放置于真空烘箱中,在抽真空脱气后取出混合液并把它倒进模具中,最后再放置于真空烘箱中进行真空干燥即可获得六方氮化硼复合膜。
本发明实现以下有益效果:
将本发明制备出的六方氮化硼复合膜通过热熔胶贴附到泡棉上,具有优异的绝缘性和导热性,导热系数可达到5-20W/(M.K)。
本发明的其它特征和优点将在随后的说明书中阐述,并且,部分地从说明书中变得显而易见,或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所指出的结构来实现和获得。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分,示出了符合本发明公开的实施例,并于说明书一起用于解释本公开的原理。
图1为本发明公开的泡棉结构整体示意图。
图中:10、PU泡棉;20、六方氮化硼复合膜。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。
实施例
一种六方氮化硼导热复合膜制备工艺,包括如下步骤:
(1)制取功能化氮化硼分散液:将六方氮化硼(h-bn)与尿素按照1:20的质量比混合后进行研磨,将研磨过后的氮化硼粉末过滤后分散到二甲基甲酰胺(dfm)中,在超声分散后获得氮化硼纳米片分散液;最后将氮化硼纳米片分散液进行溶剂热反应,反应过后形成的下层分散液即为功能化氮化硼分散液;
(2)制取氮化硼量子点溶液:对流程(1)溶液热反应之后的上层溶液进行离心,过滤离心之后的上层溶液即可获得氮化硼量子点溶液;
(3)制取聚合物基体溶液:将聚合物基体聚酰亚胺投入到二甲基甲酰胺中,搅拌后即可获得聚合物基体溶液;
(4)将流程(1)所得到的功能化氮化硼纳米片分散液、流程(2)所得到的氮化硼量子点溶液和流程(3)中所得到的聚合物基体溶液按照相应的质量比进行混合,在搅拌后超声即可获得氮化硼量子点/功能化氮化硼/聚合物基体混合液;
(5)将流程(4)所得到的氮化硼量子点/功能化氮化硼/聚合物基体混合液放置于真空烘箱中,在抽真空脱气后取出混合液并把它倒进模具中,最后再放置于真空烘箱中进行真空干燥即可获得六方氮化硼复合膜。
在实际制备过程中,流程(1)中所述的研磨包括砂磨和精磨,所述砂磨和研磨的时间为2h;流程(1)中的氮化硼纳米片分散液在100℃下化学反应24h之后获得的下层分散液为功能化氮化硼分散液;流程(1)中超声分散的时间为10h。
其次,流程(2)中的上层溶液在2000rpm转速比下离心40min得到所述氮化硼量子点溶液。
其次,流程(3)中的聚合物基体聚酰亚胺在投入到二甲基甲酰胺中,在80℃下搅匀2h得到所述聚合物基体溶液。
其次,流程(4)中所述的氮化硼量子点溶液的质量比为1~5wt%、聚合物基体溶液的质量比为50~95wt%、功能化氮化硼分散液的质量比为5~50wt%。
作为优选的,氮化硼量子点溶液的质量比为5%,聚合物基体溶液的质量比为90wt%,功能化氮化硼分散液的质量比为5%。
其次,流程(4)中的功能化氮化硼纳米片分散液、氮化硼量子点溶液和聚合物基体溶液在常温状态下搅匀0.5h,再进行超声0.5h后得到所述氮化硼量子点/功能化氮化硼/聚合物基体混合液。
其次,流程(5)中的氮化硼量子点/功能化氮化硼/聚合物基体混合液放置于真空烘箱中,常温状态下抽真空脱气,10min后取出混合液,在抽真空脱气后取出混合液并把它倒进模具中,最后再放置于真空烘箱中,在40℃真空干燥48h即可获得六方氮化硼复合膜。
参考图1所示,一种泡棉结构,包括PU泡棉10,所述PU泡棉表面通过热熔胶贴附有如上述制备完成的六方氮化硼复合膜20。
至于PU泡棉与六方氮化硼复合膜的贴附步骤,下面作如下补充:
第一步,将制备好的六方氮化硼导热复合膜一面贴合热熔胶,分条出所需规格;
第二步,将PU泡棉分条出包裹泡棉所需规格备用;
第三步,将第一步和第二步分条出的材料通过治具将其折合包裹出所需形状并通过加热模使六方氮化硼导热复合膜与PU泡棉粘合住,制成上述泡棉结构。
将本发明制备出的六方氮化硼复合膜通过热熔胶贴附到泡棉上,具有优异的绝缘性和导热性,导热系数可达到5-20W/(M.K)。
上述实施例只为说明本发明的技术构思及特点,其目的是让熟悉该技术领域的技术人员能够了解本发明的内容并据以实施,并不能以此来限制本发明的保护范围。凡根据本发明精神实质所作出的等同变换或修饰,都应涵盖在本发明的保护范围之内。

Claims (10)

1.一种六方氮化硼导热复合膜制备工艺,其特征在于,包括如下步骤:
(1)制取功能化氮化硼分散液:将六方氮化硼(h-bn)与尿素按照1:20的质量比混合后进行研磨,将研磨过后的氮化硼粉末过滤后分散到二甲基甲酰胺(dfm)中,在超声分散后获得氮化硼纳米片分散液;最后将氮化硼纳米片分散液进行溶剂热反应,反应过后形成的下层分散液即为功能化氮化硼分散液;
(2)制取氮化硼量子点溶液:对流程(1)溶液热反应之后的上层溶液进行离心,过滤离心之后的上层溶液即可获得氮化硼量子点溶液;
(3)制取聚合物基体溶液:将聚合物基体聚酰亚胺投入到二甲基甲酰胺中,搅拌后即可获得聚合物基体溶液;
(4)将流程(1)所得到的功能化氮化硼纳米片分散液、流程(2)所得到的氮化硼量子点溶液和流程(3)中所得到的聚合物基体溶液按照相应的质量比进行混合,在搅拌后超声即可获得氮化硼量子点/功能化氮化硼/聚合物基体混合液;
(5)将流程(4)所得到的氮化硼量子点/功能化氮化硼/聚合物基体混合液放置于真空烘箱中,在抽真空脱气后取出混合液并把它倒进模具中,最后再放置于真空烘箱中进行真空干燥即可获得六方氮化硼复合膜。
2.根据权利要求1所述的一种六方氮化硼导热复合膜制备工艺,其特征在于,流程(1)中所述的研磨包括砂磨和精磨,所述砂磨和研磨的时间为2h。
3.根据权利要求1所述的一种六方氮化硼导热复合膜制备工艺,其特征在于,流程(1)中的氮化硼纳米片分散液在100℃下化学反应24h之后获得的下层分散液为功能化氮化硼分散液。
4.根据权利要求1所述的一种六方氮化硼导热复合膜制备工艺,其特征在于,流程(1)中超声分散的时间为10h。
5.根据权利要求1所述的一种六方氮化硼导热复合膜制备工艺,其特征在于,流程(2)中的上层溶液在2000rpm转速比下离心40min得到所述氮化硼量子点溶液。
6.根据权利要求1所述的一种六方氮化硼导热复合膜制备工艺,其特征在于,流程(3)中的聚合物基体聚酰亚胺在投入到二甲基甲酰胺中,在80℃下搅匀2h得到所述聚合物基体溶液。
7.根据权利要求1所述的一种六方氮化硼导热复合膜制备工艺,其特征在于,流程(4)中所述的氮化硼量子点溶液的质量比为1~5wt%、聚合物基体溶液的质量比为50~95wt%、功能化氮化硼分散液的质量比为5~50wt%。
8.根据权利要求1所述的一种六方氮化硼导热复合膜制备工艺,其特征在于,流程(4)中的功能化氮化硼纳米片分散液、氮化硼量子点溶液和聚合物基体溶液在常温状态下搅匀0.5h,再进行超声0.5h后得到所述氮化硼量子点/功能化氮化硼/聚合物基体混合液。
9.根据权利要求1所述的一种六方氮化硼导热复合膜制备工艺,其特征在于,流程(5)中的氮化硼量子点/功能化氮化硼/聚合物基体混合液放置于真空烘箱中,常温状态下抽真空脱气,10min后取出混合液,在抽真空脱气后取出混合液并把它倒进模具中,最后再放置于真空烘箱中,在40℃真空干燥48h即可获得六方氮化硼复合膜。
10.一种泡棉结构,其特征在于,包括PU泡棉,所述PU泡棉表面通过热熔胶贴附有如权利要求1-9任意一项所述的六方氮化硼复合膜。
CN202310447475.4A 2023-04-24 2023-04-24 一种六方氮化硼导热复合膜制备工艺和泡棉结构 Pending CN116855073A (zh)

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