A smart “pH-hydrostatic pressure responsor” is fabricated by plasma-induced graft polymerization. Acrylic acid was grafted onto a polycarbonate porous membrane. By taking advantage of the conformational changes of polyacrylic acid chains in acidic and alkaline solutions, the grafted membrane exhibits hydrostatic pressure variation and reversible conversion to pH.
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Wu et al. (2013) studied this question.
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