【摘要】 介绍了一种用于微生化分析仪的PDMS(polydimethylsiloxane,聚二甲基硅氧烷)微混合器的模压制备,由于其兼有混合器与比色皿的功能,因此,对其透光及混合性能进行了分析。经实验证明,制品中经常出现的变形、气泡、条纹等缺陷均会使混合器的透射比变差,且缺陷越多光学性能越差。而所制作的PDMS混合器透光面的光学性能优秀,在340 nm的透射比达到90%,能够满足微生化分析仪的紫外、可见光检测要求。对膜厚为50μm的φ6 mm PDMS混合器进行定量检测发现,当驱动电压为3 V,驱动频率为80 Hz时,在5 s内能达到很好的混合效果。更多还原

【Abstract】 The fabrication and performance analyses of PDMS(polydimethylsiloxane) micromixers in mini biochemical analyzer were introduced.The PDMS micromixer was fabricated by mold pressing.The performance of transmission and mix were investigated based on the application of micromixer.The results show that distortions,air bubbles,stripes and so on can destroy the transmission of the mixer.The more the defects are,the lower the transmission is.After being removed those defects,the PDMS mixer has fine optical performances,and especially the transmission could reach to 90% when the wave length is 340 nm.The PDMS mixer can satisfy the biochemical analyzer in ultraviolet,visible range.After mixing experiments,the active mixing could be achieved in 5 s for φ6 mm mixer whose membrane thickness is 50 μm,and driven voltage and frequency are 3 V and 80 Hz,respectively.更多还原