作者:Chan Pil Park、Ram Awatar Maurya、Jang Han Lee、Dong-Pyo Kim
DOI:10.1039/c1lc20071b
日期:——
A transparent dual-channel microreactor with highly enhanced contact area-to-volume ratio was fabricated for efficient photosensitized oxygenations. The dual-channel microreactor shielded with polyvinylsilazane (PVSZ) consisting of an upper channel for liquid flow and a lower channel for O2 flow, allows sufficient phase contact along the parallel channels through a gas permeable PDMS membrane for maintaining the O2 saturated solution. Under full exposure of reactants to light, the reactions in high concentration are completed in minutes rather than hours that it takes to complete in a batch reactor. Moreover, the scale-up process using the microreactor revealed higher productivity than the batch reactor, which would be valuable for the practical applications in a broad range of gas–liquid chemical reactions.
制作了一种具有高接触面积与体积比的透明双通道微反应器,用于高效光敏氧化反应。这种由上部液体流动通道和下部氧气流动通道组成、并以聚乙烯基硅氮烷(PVSZ)屏蔽的双通道微反应器,通过气体可渗透的PDMS膜实现了平行通道间的充分相接触,从而保持了含有饱和氧气的溶液。在反应物充分暴露于光线的条件下,高浓度的反应在几分钟内即可完成,而在批式反应器中则需要数小时。此外,利用微反应器进行的放大工艺显示出了比批式反应器更高的生产效率,这对于广泛的气液化学反应的实际应用将具有重要价值。