荧光导热有机硅弹性体的制备与性能研究

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摘要利用1-溴芘和端乙烯基硅油的赫克反应,合成了不同相对分子质量的荧光乙烯基硅油。利用核磁共振仪和傅里叶变换红外光谱表征荧光硅油的化学结构,荧光分光光度计和紫外-可见吸收分光光度计表征其光学性能。荧光乙烯基硅油与交联剂在高温下交联,制备了荧光有机硅弹性体(PyPDMS),探究了PyPDMS的硬度、交联密度、力学性能和热稳定性能。结果表明:荧光弹性体具有较低的硬度(25.8~39.4 H00)、较小的交联密度和较高的热稳定性。在力学性能探究中,与无荧光弹性体(PDMS)相比,荧光基团的引入使PyPDMS-2的断裂伸长率提高为PDMS-2的1.64倍,PyPDMS-3的拉伸强度与断裂伸长率同时提高,分别为PDMS-3的1.94和1.13倍。在弹性体渗油测试中,荧光弹性体析出物质被荧光标记,可以对其进行实时监测,并且与PDMS相比,荧光弹性体的析出物质明显减少,可用于实际应用中对导热有机硅材料渗油量的调控。

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	张嫚
	马星星
	冯亚凯

关键词：荧光有机硅弹性体力学性能渗油

Abstract： Fluorescent vinyl-silicone oils with different molecular weights were synthesized by the Heck reaction between 1-bromopyrene and vinyl-terminated silicone oils. The chemical structure of fluorescent silicone oil was characterized by NMR and Fourier transform infrared spectroscopy, and its optical properties were characterized by fluorescence spectrophotometer and UV-Vis absorption spectrophotometer. Fluorescent silicone elastomers (PyPDMS) were prepared using fluorescent silicone oil and crosslinking agent through crosslinking at high temperature. The hardness, crosslinking density, mechanical properties and thermal stability of PyPDMS were explored. The results show that the fluorescent elastomers have lower hardness (25.8 to 39.4 H00), smaller crosslinking density and high thermal stability. In the mechanical properties, compared with non-fluorescent elastomers(PDMS), the introduction of fluorescent groups increase the elongation at break of PyPDMS-2 to 1.64 times that of PDMS-2, and the tensile strength and elongation at break of PyPDMS-3 were both increased to 1.94 times and 1.13 times that of PDMS-3 respectively. In the oil bleeding test of elastomers, fluorescent silicon elastomers can fluorescently trace the exudation of substances and monitor its exudation in real time, and the amount of oil bleeding of PyPDMS is significantly reduced compared with PDMS, which can be used to control the oil bleeding of the silicone thermal conductive material in practical application.

Keywords： fluorescence silicone elastomer mechanical properties oil bleeding

Received 2021-04-07;

Fund:天津市科技计划资助项目(16ZXCLGX00010,16YFZCGX00280)。

Corresponding Authors: 冯亚凯,教授,E-mail:yakaifeng@tju.edu.cn。 Email: yakaifeng@tju.edu.cn

About author: 张嫚(1995-),女,硕士研究生,现从事导热有机硅材料方面的研究。

引用本文:

张嫚, 马星星, 冯亚凯.荧光导热有机硅弹性体的制备与性能研究[J]. 化学工业与工程, 2022,39(5): 30-38

ZHANG Man, MA Xingxing, FENG Yakai.Preparation and performance of fluorescent thermal conductive silicone elastomers[J]. Chemcial Industry and Engineering, 2022,39(5): 30-38

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