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首页> 外文期刊>RSC Advances >A porous elastomeric polyurethane monolith synthesized by concentrated emulsion templating and its pressure-sensitive conductive property
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A porous elastomeric polyurethane monolith synthesized by concentrated emulsion templating and its pressure-sensitive conductive property

机译：浓缩乳液模板合成的多孔弹性聚氨酯整体料及其压敏导电性能

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摘要

Porous elastic and pressure-sensitive conductive polyurethane (PU) monoliths were synthesized by concentrated emulsion templating. A toluene solution containing tolylene diisocyanat (TDI), castor oil, and a surfactant was used as the continuous phase of the concentrated emulsion, and deionized water was used as the dispersed phase. In order to make the monolith conductive, acid-treated multi-walled carbon nanotubes (MWCNTs) were introduced into it, which were distributed in both phases spontaneously. After the continuous phase of the concentrated emulsion was cured, toluene and water were removed, and a highly porous elastic monolith was obtained. The MWCNTs in the continuous phase were embedded in the bulk PU matrix forming a conductive network and those previously in the dispersed phase were precipitated on the surface of the pore walls. It was the contact extent of the MWCNTs on the pore walls that rendered the monolith with pressure-sensitive conductivity. A compression strain of about 40% could cause a reduction in resistance by two orders of magnitude.
机译：通过浓缩乳液模板法合成了多孔弹性和压敏导电聚氨酯（PU）整体。将包含甲苯二异氰酸酯（TDI），蓖麻油和表面活性剂的甲苯溶液用作浓缩乳液的连续相，并将去离子水用作分散相。为了使整料具有导电性，将酸处理的多壁碳纳米管（MWCNT）引入其中，该碳纳米管自发地分布在两个相中。在浓缩乳液的连续相被固化之后，除去甲苯和水，并且获得了高度多孔的弹性整料。连续相中的MWCNT嵌入块体PU基质中形成导电网络，而先前分散相中的那些则沉淀在孔壁表面上。 MWCNT在孔壁上的接触程度使整料具有压敏导电性。大约40％的压缩应变可能导致电阻降低两个数量级。

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