| 초록 |
Antifouling surfaces are critical for the good performance of functional materials in various applications including marine industry, medical implants, biosensors, food packing, protective clothes, and water filtration. The surfaces derived from surface active block copolymers (SABC) having a combination of hydrophobic and hydrophilic side chains have been developed. The surfaces demonstrate superior performance against protein adsorption as well as resistance to biofouling, providing an alternative to coatings containing fluorinated side chains as the hydrophobe, thus reducing potential environmental impact. The surfaces were examined using dynamic water contact angle, captive air-bubble contact angle, atomic force microscopy, X-ray photoelectron spectroscopy and near edge X-ray absorption fine structure analysis. The PS8K-b-P(E/B)25K-b-PI10K triblock copolymer precursor (K3) initially dominated the dry surface. In contrast to previous studies with mixed fluorinated/PEG surfaces, these new materials displayed significant surface changes after exposure to water that enabled fouling resistant behavior. PEG groups buried several nanometers below the surface in the dry state were able to occupy the coating surface after placement in water. The resulting surface exhibits a very low contact angle and good antifouling properties that are very different from K3. The surfaces are strongly resistant to protein adsorption using bovine serum albumin (BSA) as a standard protein challenge. Biofouling assays with sporelings of the green alga Ulva and cells of the diatom Navicula showed adhesion was significantly reduced relative to a PDMS standard as well as to the triblock copolymer precursor of the SABCs. |
