Abstract
ABSTRACT We have investigated a simple two-step method for the hydrophilic modification of polycarbonate using polyethyleneimine (PEI) and poly(acrylic acid-co-maleic acid) (PAcM). While PEI or PAcM can improve the hydrophilicity, much better hydrophilicity is obtained by treating polycarbonate with PEI and then PAcM. While a higher treating temperature generally leads to a lower contact angle, the reaction time does not play an important role (e.g., between 15 and 90 min). Meanwhile, increasing the concentration of PEI or PAcM can generate better hydrophilicity. Superhydrophilicity is obtained with a contact angle of 3° while maintaining the transparency of polycarbonate.
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