4.6 Article

Thermal, Mechanical, and Acoustic Properties of Polydimethylsiloxane Filled with Hollow Glass Microspheres

期刊

MATERIALS
卷 15, 期 5, 页码 -

出版社

MDPI
DOI: 10.3390/ma15051652

关键词

PDMS; hollow glass microspheres; thermal conductivity; sound insulation

资金

  1. Estonian Centre of Excellence in Zero Energy and Resource Efficient Smart Buildings and Districts, ZEBE - European Regional Development Fund [2014-2020.4.01.15-0016]
  2. ERA Chair MATTER from the European Union's Horizon 2020 research and innovation programme [856705]
  3. Estonian Research Council [PRG1198]

向作者/读者索取更多资源

PDMS, the widely used silicon-based polymer, can be significantly improved for thermal insulation properties by adding hollow glass microspheres (HGMs), but the sound insulation capacity may slightly decrease.
Polydimethylsiloxane (PDMS) is the most widely used silicon-based polymer due to its versatility and its various attractive properties. The fabrication of PDMS involves liquid phase cross-linking to obtain hydrophobic and mechanically flexible material in the final solid form. This allows to add various fillers to affect the properties of the resulting material. PDMS has a relatively low Thermal Conductivity (TC), in the order of 0.2 W/mK, which makes it attractive for thermal insulation applications such as sealing in construction. Although a further decrease in the TC of PDMS can be highly beneficial for such applications, most research on the thermal properties of PDMS composites have focused on fillers that increase the TC rather than decrease it. In the present work, we propose a simple and reliable method for making a PDMS-based composite material with significantly improved thermal insulation properties, by adding hollow glass microspheres (HGMs) to the mixture of the liquid base and the cross-linker (10:1 ratio), followed by degassing and heat-assisted crosslinking. We obtained a 31% reduction of thermal conductivity and a 60% increase in the elastic modulus of samples with HGM content of 17% by weight. At the same time, the sound insulation capacity of the PDMS-HGM composite is slightly decreased in comparison to pure PDMS, as a result of its lower density. Finally, the wettability of the samples had no dependence on HGM content.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据