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Controllable, Bidirectional Water/Organic Vapors Responsive Actuators Fabricated by One‐Step Thiol‐Ene Click Polymerization
Author(s) -
Song Yanjiao,
He Jianghua,
Zhang Yuetao
Publication year - 2020
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.202000456
Subject(s) - materials science , pentaerythritol , monomer , ene reaction , polymerization , chemical engineering , click chemistry , polymer chemistry , acetone , substrate (aquarium) , organic chemistry , composite material , chemistry , polymer , oceanography , engineering , fire retardant , geology
It is challenging to synthesize stimuli‐responsive materials with the well‐balanced performance of fast stimulus–response speed, good mechanical strength, multi‐functionality, and deformation diversity as well. This work reports a facile, one‐step thiol‐ene click polymerization strategy for preparation of water/acetone vapor‐responsive hierarchical films, by using diallyl terephthalate (P) as hydrophobic ene‐monomer, 1,4‐diallyl‐1,4‐diazabicyclo [2.2.2]octane‐1,4‐diium bromide (B) as hydrophilic ene‐monomer, and pentaerythritol tetra(3‐mercaptopropionate) (PETMP) as thiol monomer. Besides, by taking advantage of the specific hydrophilic/hydrophobic induction effect of substrate and adjusting the molar ratio of P to B, P 60 B 40 ‐HPI film is fabricated on hydrophilic substrate “with plasma treatment” whereas P 80 B 20 ‐HPO film is obtained on hydrophobic substrate “without plasma treatment”. Their “upper‐dense and lower‐porous” structural feature ensured the excellent combination of fast stimuli‐response speed endowed by the porous structure and good mechanical strength enhanced by the upper dense surface. Both films are bidirectional water/acetone vapor‐responsive materials, but their bending directions responding to the stimuli factors are completely opposite. This strategy showed great potential in the development of smart stimuli‐responsive materials.