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首页> 外文期刊>Polymer international >Preparation of highly H~+ permeable sulfonated poly(ether ether ketone) cation exchange membranes and their applications in electro-generation of thioglycolic acid
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Preparation of highly H~+ permeable sulfonated poly(ether ether ketone) cation exchange membranes and their applications in electro-generation of thioglycolic acid

机译：高H〜+渗透性磺化聚醚醚酮阳离子交换膜的制备及其在巯基乙酸发电中的应用

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BACKGROUND: Sulfonated poly(ether ether ketone) (SPEEK) was successfully synthesized from sulfonated 4,4'-difluorobenzophenone, 4,4'-difluorobenzophenone and bisphenol A. SPEEK cation exchange membranes were prepared by the casting method. The composition and morphology of SPEEK were characterized using Fourier transform infrared and H NMR spectroscopies, respectively. The ion exchange capacity (IEC), water uptake and degree of swelling of the membranes were also investigated. SPEEK120 was used as a separator in an electrolysis cell to produce thioglycolic acid (TGA). RESULTS: SPEEK polymerization was carried out at 145 and 175 °C for 10 h. The IEC of the SPEEK membranes was measured as 0.24-2.02 meq g~(-1) and the water uptake as 2.26-26.45%. The degree of swelling of the membranes was 1.71 -15.28%. TGA was effectively prepared by electro-reduction of dithioglycolic acid. The current efficiency peaked at 58.31% at room temperature with a current density of 15 mA cm~(-2). CONCLUSION: SPEEK120 membrane shows good dimensional stability and H~+ permeability. Compared to the traditional metal-reduction method, the current electro-reduction technique avoids the use of zinc powder and so reduces environmental pollution.
机译：背景：由磺化的4,4'-二氟二苯甲酮，4,4'-二氟二苯甲酮和双酚A成功合成了磺化的聚醚醚酮（SPEEK）。采用流延法制备了SPEEK阳离子交换膜。分别使用傅立叶变换红外和1 H NMR光谱对SPEEK的组成和形态进行表征。还研究了膜的离子交换容量（IEC），吸水率和溶胀度。 SPEEK120用作电解池中的隔板，以生产巯基乙酸（TGA）。结果：SPEEK聚合反应在145和175°C下进行10 h。 SPEEK膜的IEC的测量值为0.24-2.02 meq g〜（-1），吸水率为2.26-26.45％。膜的溶胀度为1.71 -15.28％。通过电还原二硫代乙醇酸可以有效地制备TGA。电流效率在室温下达到58.31％的峰值，电流密度为15 mA cm〜（-2）。结论：SPEEK120膜具有良好的尺寸稳定性和H〜+渗透性。与传统的金属还原方法相比，当前的电还原技术避免了使用锌粉，从而减少了环境污染。

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