Surface patterned graft copolymerization of hydrophilic monomers onto hydrophobic polymer film upon UV irradiation

We synthesized a series of renewable and plant-based isoeugenol-substituted polystyrenes (PIEU#, # = 100, 80, 60, 40, and 20, where # is the molar percent content of isoeugenol moiety), using polymer modification reactions to study their liquid crystal (LC) alignment behavior. In general, the LC cells fabricated using polymer film with a higher molar content of isoeugenol side groups showed vertical LC alignment behavior. This alignment behavior was well related to the surface energy value of the polymer layer. For example, vertical alignments were observed when the polar surface energy value of the polymer was smaller than approximately 3.59 mJ/m2, generated by the nonpolar isoeugenol moiety with long and bulky carbon groups. Good alignment stability at 100 °C and under ultraviolet (UV) irradiation of 15 J/cm2 was observed for the LC cells fabricated using PIEU100 as a LC alignment layer. Therefore, renewable isoeugenol-based materials can be used to produce an eco-friendly vertical LC alignment system.

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Synthesis of spiropyran with methacrylate at the benzopyran moiety and control of the water repellency and cell adhesion of its polymer film

Journal of Materials Chemistry B ◽

10.1039/c9tb02733e ◽

2020 ◽

Vol 8 (7) ◽

pp. 1489-1495

Author(s):

Nobuo Murase ◽

Tsuyoshi Ando ◽

Hiroharu Ajiro

Keyword(s):

Thin Film ◽

Cell Culture ◽

Cell Adhesion ◽

Polymer Film ◽

Uv Irradiation ◽

Water Repellency ◽

Nih3t3 Cells ◽

And Control

NIH3T3 cells were spread only on 6% of the surface of the PSpMA thin film after UV irradiation compared with no UV irradiation. As a result, we successfully synthesized a photo-controllable cell culture scaffold.

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Study on Preparation and Surface Properties of Fluorinated Acrylate Hydrophobic Polymer Film

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1088.101 ◽

2015 ◽

Vol 1088 ◽

pp. 101-106

Author(s):

Jing Chen ◽

Qian Cheng ◽

Shun Quan Chen

Keyword(s):

Contact Angle ◽

Water Content ◽

Polymer Film ◽

Water Contact ◽

Fluorinated Acrylate ◽

Fluorinated Polyacrylate ◽

Hydrophobic Polymer ◽

Air Interface ◽

Surface Morphologies ◽

Lower Water Content

A new fluorinated acrylate terpolymer hydrophobic polymer was prepared by emulsifier-free inverse microemulsion polymerization using methyl methacrylate (MMA) and hexafluorobutyl acrylate (HFBA) as monomers, and methyl polyethylene glycol methacrylate (MPEGMA) as polymerizable emulsifier. Membrane properties were characterized by means of FT-IR, SEM and Contact Angle Meter. The effect of fluorinated monomer content, water content in the inverse precursor microemulsion on the surface morphologies and hydrophobicity of the polymer film was mainly discussed. Morphological studies of the fluorinated polyacrylate polymers by SEM showed that discrete granular microstructures were obtained from precursor microemulsion with higher water content. On the other hand, smooth and continuous surface morphologies were found with lower water content. Contact angle revealed that the fluorine preferentially enriched at the film-air interface and more hydrophobic that the film-glass interface. The amount of HFBA had significantly effects on the film properties. The water contact angle of the film-air interface increased as the amount of HFBA increased from 0 ml to 4 ml and then remained almost unchangeable. The film formed from the fluorinated polyacrylate polymer with higher water content in the precursor microemulsion exhibited better hydrophobicity in comparison with the film formed from the fluorinated polyacrylate polymer with the lower water content, and it confirmed that rough surface have high water contact angles.

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