Abstract
Fluoroalkyl end-capped vinyltrimethoxysilane-N,N-dimethylacrylamide cooligomer [RF-(CH2-CHSi(OMe)3)x-(CH2-CHC(=O)NMe2)y-RF; RF = CF(CF3)OC3F7: RF-(VM)x-(DMAA)y-RF] was synthesized by reaction of fluoroalkanoyl peroxide [RF-C(=O)O-O(O=)C-RF] with vinyltrimethoxysilane (VM) and N,N-dimethylacrylamide (DMAA). The modified glass surface treated with the cooligomeric nanoparticles [RF-(VM-SiO3/2)x-(DMAA)y-RF] prepared under the sol-gel reaction of the cooligomer under alkaline conditions was found to exhibit an oleophobic/superhydrophilic property, although the corresponding fluorinated homooligomeric nanoparticles [RF-(VM-SiO3/2)n-RF] afforded an oleophobic/hydrophobic property on the modified surface under similar conditions. RF-(VM-SiO3/2)n-RF/RF-(VM-SiO3/2)x-(DMAA)y-RF/PSt (micro-sized polystyrene particles) composites, which were prepared by the sol-gel reactions of the corresponding homooligomer and cooligomer in the presence of PSt particle under alkaline conditions, provided an oleophobic/superhydrophilic property on the modified surface. However, it was demonstrated that the surface wettability on the modified surface treated with the RF-(VM-SiO3/2)n-RF/RF-(VM-SiO3/2)x-(DMAA)y-RF/PSt composites changes dramatically from oleophobic/superhydrophilic to superoleophilic/superhydrophilic and superoleophilic/superhydrophobic characteristics, increasing with greater feed ratios (mg/mg) of the RF-(VM)n-RF homooligomer in homooligomer/cooligomer from 0 to 100 in the preparation of the composites. Such controlled surfac
Highlights
Considerable interest has been hitherto focused on micro-sized inorganic and organic particles, such as silica gel [1]-[6], the ion-exchange resin [7] [8] [9] [10], and titanium oxide [11] [12] [13], because these particles have a wide range of practical use such as adsorbents for metal ions and white pigments in the plastic industry [1]-[13]
We report that fluoroalkyl end-capped vinyltrimethoxysilane homooligomer/fluoroalkyl end-capped vinyltrimethoxysilane-N,Ndimethylacrylamide cooligomer/micro-sized polystyrene particle (PSt) composites, which are prepared by the sol-gel reactions of the corresponding homooligomer and cooligomer in the presence of PSt particle under alkaline conditions, can exhibit the wettability-controlled behavior from highly oleophobic/superhydrophilic to superoleophilic/superhydrophobic characteristics on their surfaces, increasing with greater feed ratios of the homooligomer in homooligommer/cooligomer in the preparation of the composites
The fluoroalkylated cooligomeric nanoparticles [RF-(VM-SiO3/2)x-(DMAA)y-RF] prepared by the sol-gel reaction of the cooligomer under alkaline conditions were applied to the surface modification to exhibit the oleophobic/superhydrophilic property on the modified surface; the fluoroalkyl end-capped vinyltrimethoxysilane homooligomeric nanoparticles [RF-(VM-SiO3/2)n-RF] prepared under similar sol-gel reactions with the corresponding homooligomer were found to supply the oleophobic/hydrophobic property on the modified surface
Summary
Considerable interest has been hitherto focused on micro-sized inorganic and organic particles, such as silica gel [1]-[6], the ion-exchange resin (cationic or anionic cross-linked polymer beads) [7] [8] [9] [10], and titanium oxide [11] [12] [13], because these particles have a wide range of practical use such as adsorbents for metal ions and white pigments in the plastic industry [1]-[13]. We previously reported that two fluoroalkyl end-capped vinyltrimethoxysilane—acryloylmorpholine cooligomer can reveal the oleophobic/superhydrophilic property on the glass surface through the flip-flop motion between the fluoroalkyl groups and hydrophilic morpholino units in cooligomer on the modified surface under the environmental change from air to water [18]. From this point of view, it is of particular interest to explore novel fluoroalkyl end-capped oligomers/micro-sized particle composites possessing unique wettability on their surface. We report that fluoroalkyl end-capped vinyltrimethoxysilane homooligomer/fluoroalkyl end-capped vinyltrimethoxysilane-N,Ndimethylacrylamide cooligomer/micro-sized polystyrene particle (PSt) composites, which are prepared by the sol-gel reactions of the corresponding homooligomer and cooligomer in the presence of PSt particle under alkaline conditions, can exhibit the wettability-controlled behavior from highly oleophobic/superhydrophilic to superoleophilic/superhydrophobic characteristics on their surfaces, increasing with greater feed ratios of the homooligomer in homooligommer/cooligomer in the preparation of the composites
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
