Intelligent Dual-Responsive Cellulose Surfaces via Surface-Initiated ATRP

摘要

Novel thermo-responsive cellulose(filter paper)surfaces of N-isopropylacrylamide(NIPAAm)and pH-responsive cellulose surfaces of 4-vinylpyridine(4VP)have been achieved via surface-initiated ATRP.Dual-responsive(pH and temperature)cellulose surfaces were also obtained through the synthesis of block-copolymer brushes of PNTPAAm and P4VP.With changes in pH and temperature,these"intelligent"surfaces showed a reversible response to both individual triggers,as indicated by the changes in wettability from highly hydrophilic to highly hydrophobic observed by water contact angle measurements.Adjusting the composition of the grafted block-copolymer brushes allowed for further tuning of the wettability of these"intelligent"cellulose surfaces.