TY - JOUR
T1 - Series of liquid separation system made of homogeneous copolymer films with controlled surface wettability
AU - Kwak, Moo Jin
AU - Oh, Myung Seok
AU - Yoo, Youngmin
AU - You, Jae Bem
AU - Kim, Jiyeon
AU - Yu, Seung Jung
AU - Im, Sung Gap
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/5/12
Y1 - 2015/5/12
N2 - Exquisite surface wettability control of separation system surface is required to achieve separation of liquids with low surface tension difference. Here, we demonstrate a series of surface-energy-controlled homogeneous copolymer films to control the surface wettability of polyester fabric, utilizing a vapor-phase process, termed as initiated chemical vapor deposition (iCVD). The homogeneous copolymer films consist of a hydrophobic polymer, poly(2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane), pV4D4, and a hydrophilic polymer, poly(4-vinylpyridine), p4VP. Because the mixing of two or more components is always favorable in vapor phase, the iCVD process allows the formation of homogeneous copolymers from two immiscible, hydrophilic/hydrophobic monomer pairs, which is highly challenging to achieve in liquid phase. Simply by tuning the flow rate ratio of monomer pairs, a series of homogeneous copolymers with systematically controlled surface energy were formed successfully. The fabricated separation system could separate water (surface energy = 72.8 mJ/m2), glycerol (64 mJ/m2), ethylene glycol (48 mJ/m2), and olive oil (35.1 mJ/m2) sequentially with excellent selectivity, just by choosing a copolymer-coated polyester fabric with proper surface energy. Considering the small differences in the surface tension of the liquids used in this work, the surface-energy-controlled separation system can be a powerful tool to separate various kinds of liquid mixtures.
AB - Exquisite surface wettability control of separation system surface is required to achieve separation of liquids with low surface tension difference. Here, we demonstrate a series of surface-energy-controlled homogeneous copolymer films to control the surface wettability of polyester fabric, utilizing a vapor-phase process, termed as initiated chemical vapor deposition (iCVD). The homogeneous copolymer films consist of a hydrophobic polymer, poly(2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane), pV4D4, and a hydrophilic polymer, poly(4-vinylpyridine), p4VP. Because the mixing of two or more components is always favorable in vapor phase, the iCVD process allows the formation of homogeneous copolymers from two immiscible, hydrophilic/hydrophobic monomer pairs, which is highly challenging to achieve in liquid phase. Simply by tuning the flow rate ratio of monomer pairs, a series of homogeneous copolymers with systematically controlled surface energy were formed successfully. The fabricated separation system could separate water (surface energy = 72.8 mJ/m2), glycerol (64 mJ/m2), ethylene glycol (48 mJ/m2), and olive oil (35.1 mJ/m2) sequentially with excellent selectivity, just by choosing a copolymer-coated polyester fabric with proper surface energy. Considering the small differences in the surface tension of the liquids used in this work, the surface-energy-controlled separation system can be a powerful tool to separate various kinds of liquid mixtures.
UR - http://www.scopus.com/inward/record.url?scp=84929208160&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.5b00842
DO - 10.1021/acs.chemmater.5b00842
M3 - Article
AN - SCOPUS:84929208160
SN - 0897-4756
VL - 27
SP - 3441
EP - 3449
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 9
ER -