Liquid crystal alignment behaviours on poly(methyl methacrylate) having polyhedral oligomeric silsesquioxane groups

Kang, Hyo; Hong, Hyunkee; Kim, Dong Gyun; Sohn, Eun Ho; Shim, Ji-Yeon; Kang, Daeseung; Lee, Jong Chan

doi:10.1080/02678292.2014.960487

Cited by 19 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3,9 1. 5,15 1 7,13 ]octasiloxan-1-yl)propyl methacrylate), 39.79, 10.63, and 22.70 mN/m, respectively, 64,65 it is assumed that the hydrophobicity of the HCPM moiety is sufficient to interrupt the formation of a continuous oil-fouling film.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Mussel-Inspired Dopamine- and Plant-Based Cardanol-Containing Polymer Coatings for Multifunctional Filtration Membranes

Choi

Kang

Kim

et al. 2014

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

A series of copolymers [PCD#s, where # is the weight percentage of dopamine methacrylamide (DMA) in polymers] containing mussel-inspired hydrophilic dopamine and plant-based hydrophobic cardanol moieties was prepared via radical polymerization using DMA and 2-hydroxy-3-cardanylpropyl methacrylate (HCPM) as the monomers. PCD#s were used as coating materials to prevent flux decline of the membranes caused by the adhesion of biofoulants and oil-foulants. Polysulfone (PSf) ultrafiltration membranes coated with PCD#s showed higher biofouling resistance than the bare PSf membrane, and the bactericidal properties of the membranes increased upon increasing the content of HCPM units in the PCD#s. Serendipitously, the PSf membranes coated with the more or less amphiphilic PCD54 and PCD74, having the optimum amount of both hydrophilic DMA and hydrophobic HCPM moieties, showed noticeably higher oil-fouling resistance than the more hydrophilic PCD91-coated membrane, the more hydrophobic PCD0-coated membrane, and the bare PSf membrane. Therefore, multifunctional coating materials having biofouling- and oil-fouling-resistant and bactericidal properties could be prepared from the monomers containing mussel-inspired dopamine and plant-based cardanol groups.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Mussel-Inspired Dopamine- and Plant-Based Cardanol-Containing Polymer Coatings for Multifunctional Filtration Membranes

Choi

Kang

Kim

et al. 2014

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

“…Though these attempts could create a more soluble modified PI, main-chain-type PIs are still unable to satisfy the requirements of manufacturing high-performance LCDs. Recently, it was reported that LCDs with vertical alignment mode had a faster response time and a higher contrast ratio compared to that with parallel aligned mode, [9,10] and there are several materials which could use to induce liquid crystals (LCs) to align vertically, such as poly(methyl methacrylate) with polyhedral oligomeric silsesquioxane groups, [11] PI with long side chains. [12] PIs attracted a lot of scientific interest because of their good performance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of novel soluble rubbing-resistant polyimides used as liquid crystal vertical alignment layers

et al. 2015

View full text Add to dashboard Cite

A novel functional diamine N12, containing triphenylamine moiety, biphenyl, tert-butyl substituents and long alkyl chain, N,N-bis(4-aminophenyl)-p-(3,5-di-tert-butyl-4-dodecyloxy phenyl) aniline (N12), was synthesised and characterised. A series of polyimides (PIs) were prepared based on 2,2ʹ-bis(trifluoromethyl)benzidine, 4,4ʹ-oxydiphthalicanhydride and different contents of N12 via a conventional two-step procedure that included a ringopening polyaddition to gain polyamic acids, followed by chemical cyclodehydration. The chemical structures of the intermediates, diamines and PIs were characterised by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. All of the PIs were amorphous and exhibited good solubility in both polar aprotic solvents and some low boiling point solvents. PIs containing different content of N12 could induce highly uniform vertical alignment of liquid crystals (LCs). More importantly, PIs derived from N12 showed a good rubbing resistance. Besides, all PI films showed high transmittance in the wavelength range 400-700 nm and good thermal stabilities. Such PIs could be suitable candidates for alignment layers used in the manufacture of highperformance vertical alignment mode LC displays.

show abstract

“…[22,23] POSS segment has also been introduced to the liquid crystalline (LC) materials in order to improve the thermal stability and to promote the tendency to form the LC phase. [24][25][26] Generally, POSS liquid crystalline materials include three major groups, that is, both the mesogenic moieties and POSS as side chains, [27,28] POSS as a core and one or several mesogenic moieties as side chains [29][30][31][32] and starshaped POSS LC polymers. [33] The star-shaped POSS LC polymer is a kind of macromolecular LC with POSS as the branching point (core) and several polymeric LC as arms.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterisation of star-shaped liquid crystalline polymer with a POSS core

2015

View full text Add to dashboard Cite

The star-shaped POSS-graft-LCP with POSS as the core and liquid crystal polymer, poly{6-(4ʹ-octyloxyphenyl-4″-benzoyl)hexyl acrylate}, as arms was prepared by atom transfer radical polymerisation technique using octa(3-chloropropyl) polyhedral oligomeric silsesquioxane [POSS-(CH 2 CH 2 CH 2 Cl) 8 ] as initiator. For comparison, the linear liquid crystal polymer, poly{6-(4ʹ-octyloxyphenyl-4″-benzoyl)hexyl acrylate} (LLCP), was obtained by conventional radical polymerisation. Both liquid crystal polymers were characterised by FT-IR, 1 H NMR, 13 C NMR, gel permeation chromatography, thermogravimetric analysis, differential scanning calorimetry, polarised optical microscopy and X-ray diffraction analysis. The liquid crystal phase behaviour research demonstrated that both liquid crystal polymers were reversible thermotropic nematic liquid crystal materials. The number of polymerisation degree of every arm attached on POSS in POSS-graft-LCP impacted greatly on the liquid crystal properties and only a small one was necessary for it to exhibit a broad liquid crystal range. Results further demonstrated that the special star-shaped topology of POSS and the eight arms attached helped POSS-graft-LCP form and stabilise liquid crystal phase easily. This research may further expand the way to star-shaped LCPs by employing a variety of (meth)acrylate and other vinyl liquid crystalline monomers.

show abstract

Liquid crystal alignment behaviours on poly(methyl methacrylate) having polyhedral oligomeric silsesquioxane groups

Cited by 19 publications

References 27 publications

Mussel-Inspired Dopamine- and Plant-Based Cardanol-Containing Polymer Coatings for Multifunctional Filtration Membranes

Mussel-Inspired Dopamine- and Plant-Based Cardanol-Containing Polymer Coatings for Multifunctional Filtration Membranes

Synthesis of novel soluble rubbing-resistant polyimides used as liquid crystal vertical alignment layers

Synthesis and characterisation of star-shaped liquid crystalline polymer with a POSS core

Contact Info

Product

Resources

About