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首页> 外文期刊>Journal of Applied Polymer Science >Durability of poly(dimethylsiloxane) when exposed to chlorine gas
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Durability of poly(dimethylsiloxane) when exposed to chlorine gas

机译：聚二甲基硅氧烷在氯气中的耐久性

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Highly crosslinked poly(dimethylsiloxane) (PDMS) is discussed as an alternative membrane material for the gas separation of highly concentrated chlorine gas (90-95 vol %) and oxygen, due to an initial high permeation for Cl-2 and a high selectivity of Cl-2/O-2. It was found that the separation properties of the PDMS membrane change over time upon exposure to aggressive chlorine gas; the flux will go down, and the material may even degrade if not appropriately prepared and protected. The PDMS was exposed to chlorine gas over 4 weeks in a glass chamber at both 30 and 60degreesC and analysed by (FTIR). The membranes were exposed to chlorine gas in a permeation cell with measurements of the permeability of N-2, O-2, and Cl-2 at regular intervals. The temperature range for the permeation measurements was 30-100degreesC, and the pressure difference over the membrane was ca. 2 bar. The time of exposure in the permeation cell was several weeks. The absorption of N-2, O-2, and Cl-2 in the PDMS at temperatures in the same range was also measured. This article discusses the durability of the highly crosslinked PDMS membrane following chlorine exposure. (C) 2002 Wiley Periodicals, Inc. [References: 11]
机译：讨论了高交联的聚二甲基硅氧烷（PDMS）作为高浓度氯气（90-95 vol％）和氧气的气体分离的替代膜材料，这是由于最初对Cl-2的高渗透性和高选择性的。 Cl-2 / O-2。发现当暴露于腐蚀性氯气时，PDMS膜的分离特性随时间而变化;这是因为，随着时间的流逝，PDMS膜的分离特性随着时间的变化而变化。助焊剂会下降，如果没有适当的准备和保护，材料甚至可能降解。将PDMS在30和60摄氏度的玻璃室中暴露于氯气中超过4周，并通过（FTIR）进行分析。将膜暴露在渗透池中的氯气中，定期测量N-2，O-2和Cl-2的渗透率。渗透测量的温度范围为30-100℃，膜上的压差为约2。 2巴。在渗透池中的暴露时间为数周。还测量了在相同范围内的温度下PDMS中N-2，O-2和Cl-2的吸收。本文讨论了氯接触后高度交联的PDMS膜的耐久性。 （C）2002 Wiley Periodicals，Inc. [参考：11]

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