Surface modification technology for polymer microfluidic channels combining GPTMS coating and plasma treatment
To enhance the surface modification effectiveness of polymer materials,a combined treatment approach using 3-glycidyloxypropyltrimethoxysilane(GPTMS)coating and plasma treatment was used for investigating the surface modification effects of five common polymers,including polymethyl methacrylate(PMMA),polystyrene,polyethylene terephthalate,polypropyl-ene,and polycarbonate.The mechanism and effectiveness of this modification were examined by analyzing surface wettability(contact angle),chemical composition,roughness,fluid flow performance in microfluidic channels,and their durability.The results indicate that the combined GPTMS coating and plasma treatment,referred to as GP-Plasma modification,significantly improves the surface hydrophilicity and durability of the five polymer materials compared to plasma treatment alone.The contact angles of the modified polymers surfaces are reduced to nearly 0°,and remained below 20° after 28 days storage at-15℃.X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy analyses confirm an approximate 140%increase in the O/C atomic ratio of PMMA and the formation of Si—O—Si bonds following the GP-Plasma modification.The atomic force microscopy results indicate that the surface roughness of PMMA is increased by 95%after GP-Plasma modification compared to plasma treatment,further enhancing surface wettability.In microfluidic channels tests,the fluid flow time of the modified PMMA sample is reduced by an average of 64%,achieving stable liquid flow,demonstrating the potential of this modification technology for practical applications.
combined silane coating and plasma treatment modificationwettabilitypolymermicrofluidic channelsdurability
万方数据
维普
