<Original Papers>Preparation of UCST types of thermoresponsive sulfobetaine polymer modified poly (ethylene terephthalate) films by Ar plasma-post polymerization method

Abstract

publisher[Abstract] For high-throughput cell-diagnosis and non-invasive target cell recovery by heating laser-irradiation to microarray (μAy) spots using immobilized with single cell or several number of cells, the surface-modified poly(ethylene terephtalate) films [PET] substrate with poly{2-[(methacryloyloxy)ethyl] dimethyl-(3-sulfoproryl) ammonium hydroxide} [poly (SBMA)] of upper critical solution temperature (UCST) polymer was prepared by Ar plasma-post polymerization method. From the scanning probe microscopy (SPM) measurements, poly (SBMA) brushes were observed on the PET substrate(g-PET). From the contact angle(θ) measurements to water at 26℃, the θ values of g-PET(amount of grafted polymer=0.018 mg cm^-2) decreased from θ=75°(the untreated PET) to θ=49°. On the other hand, the θ values at 40℃, the θvalues of g-PET decreased from θ=49° to θ=46°. The number average molecular weight (Mn) of g-PET was Mn=0.13_x10^4