Self-Assembly of the Block Copolymer Containing Discotic Mesogens Driven by Liquid Crystalline Ordering Effect DOI Open Access

Xiaojian Hou,

Lingjuan Hu,

Huanzhi Yang

et al.

Polymers, Journal Year: 2024, Volume and Issue: 16(23), P. 3339 - 3339

Published: Nov. 28, 2024

Block copolymers (BCPs) have attracted considerable attention due to their ability form a variety of complex assemblies with diverse morphologies and functions in solution. By incorporating liquid crystalline (LC) moieties, the LC side chains significantly affect sizes BCP assemblies. In this study, we synthesized copolymer an block containing triphenylene (HAT) discotic mesogen short methylene chains. enhancing π–π interaction between mesogens, doping orderedness was enhanced able dictate self-assembly behaviors Additionally, lengths resultant fibrillar micelles were easily tuned by adjusting dopant content. More interestingly, two growth modes, nucleation coupling, observed during formation fibrils. Consequently, long-term aging sufficient concentration, large portion these fibrils underwent end-to-end coupling long fibrils, allowing organogel via inter-fibrillar entanglement.

Language: Английский

Allyl sulfide-based visible light-induced dynamically reshaped liquid crystalline elastomer/SWCNT nanocomposites capable of multimode NIR photomechanical actuations DOI

Zhongying Wu,

Pin Cheng,

Weiguang Zhao

et al.

New Journal of Chemistry, Journal Year: 2020, Volume and Issue: 44(26), P. 10902 - 10910

Published: Jan. 1, 2020

The fully light-driven LCE/SWCNT composite films with exchangeable covalent crosslinks possess reconfigurability and recyclability, enabling shrinking, bending curling motions.

Language: Английский

Citations

25
High intrinsic thermally conductivity side-chain liquid crystalline polysiloxane films grafted with pendent difunctional mesogenic groups DOI

Xiaole Zheng,

Yingjie Zhan,

Yingchun Liu

et al.

Polymer Chemistry, Journal Year: 2022, Volume and Issue: 13(26), P. 3915 - 3929

Published: Jan. 1, 2022

Herein, the microscopic ordered aggregation morphologies of SCLCP films are investigated, and molecular structures with regular arrangement can increase heat transfer via suppressing scattering phonons, thus greatly improving λ SCLCPs.

Language: Английский

Citations

14
Cross-linked liquid crystalline polybenzoxazines bearing cholesterol-based mesogen side groups DOI
Ying Liu, Jiming Chen,

Yong‐Xin Qi

et al.

Polymer, Journal Year: 2018, Volume and Issue: 145, P. 252 - 260

Published: May 3, 2018

Language: Английский

Citations

23
Side-chain polysiloxane liquid crystalline elastomers from non-mesogenic components DOI
Kikkeri Narasimha Shetty Mohana, S. Umadevi

New Journal of Chemistry, Journal Year: 2019, Volume and Issue: 43(40), P. 15968 - 15978

Published: Jan. 1, 2019

Synthesis and characterisation of two new azo-based polysiloxane liquid crystalline elastomers containing non-mesogenic monomers different cross-linkers are described.

Language: Английский

Citations

13
Environmentally Stable Chiral-Nematic Liquid-Crystal Elastomers with Mechano-Optical Properties DOI Creative Commons

Kyosun Ku,

Kyohei Hisano,

Seiya Kimura

et al.

Applied Sciences, Journal Year: 2021, Volume and Issue: 11(11), P. 5037 - 5037

Published: May 29, 2021

Chiral-nematic liquid crystal (N* LC) elastomers exhibit mechano-optical responsive behavior. However, practical sensor applications have been limited by the intrinsic sensitivity of N* LC to environmental conditions, such as temperature. Although densely cross-linked network polymers high thermal stability, they are not proper for mechanical due glass transition temperatures and low flexibility. To overcome these issues, we focused on enhancing stability introducing noncovalent cross-linking sites via intermolecular interactions between molecules bonded polymer network. with a cyanobiphenyl derivative side-chain mesogen exhibited behavior, hypsochromic shift reflection peak wavelength under an applied tensile strain quick shape color recovery owing elasticity. Notably, showed resistance harsh environments, including various solvents. Interactions, π–π stacking dipole–dipole interactions, units can act weak cross-links, thus improving phase without affecting response. Thus, great potential realization sensors.

Language: Английский

Citations

11
LC‐Polymers and Smectic Phases with Special Substructures/Nanophase Segregation DOI Creative Commons
Rudolf Zentel

Macromolecular Chemistry and Physics, Journal Year: 2021, Volume and Issue: 222(20)

Published: Aug. 13, 2021

Abstract Liquid crystalline (LC) polymers find still a lot of interest, whereby the focus is—at present—on LC‐elastomers with different phases and their application for mechanical actuation. While LC‐phases in LC‐polymers can—generally—be well described analogy to low molar mass counterparts, some special properties became evident systems smectic phases. They are related modulation nanophase segregation within layers include often formation sublayers consisting poorly compatible parts polymer like bulky (=non mesogenic) units, ionic groups, or miscible main chain (e.g., polysiloxanes). Such behavior can be found semiflexible LC‐main LC‐side polymers. Here authors i) describe which such modification structure is observed, ii) discuss origin deviation, iii) possible design functional materials. The substructures allow, example, mixing other polymers, have good affinity second sublayer. It also allows it separate, extent, network from packing mesogens LC‐polysiloxanes.

Language: Английский

Citations

7
Effect of Crosslinkers on Optical and Mechanical Behavior of Chiral Nematic Liquid Crystal Elastomers DOI Creative Commons

Kyosun Ku,

Kyohei Hisano,

Kyoko Yuasa

et al.

Molecules, Journal Year: 2021, Volume and Issue: 26(20), P. 6193 - 6193

Published: Oct. 14, 2021

Chiral nematic (N*) liquid crystal elastomers (LCEs) are suitable for fabricating stimuli-responsive materials. As crosslinkers considerably affect the N*LCE network, we investigated effects of crosslinking units on physical properties N*LCEs. The N*LCEs were synthesized with different types crosslinkers, and relationship between N*LC polymeric system unit was investigated. emit color by selective reflection, in which changes response to mechanical deformation. LC-type crosslinker decreases helical twisting power increasing total molar ratio mesogenic compound. exhibits mechano-responsive coupling orientation polymer where exhibit degrees pitch variation depending crosslinker. Moreover, increases Young's modulus N*LCEs, long methylene chains increase breaking strain. An analysis experimental results verified effect providing a design rationale materials mechano-optical sensor applications.

Language: Английский

Citations

7
Siloxane-based side-chain liquid crystal elastomers containing allyl 4-((4-decyloxy)benzoyl)oxy)benzoate as a monomer DOI
Kikkeri Narasimha Shetty Mohana, S. Umadevi

Polymer Bulletin, Journal Year: 2022, Volume and Issue: 80(8), P. 9323 - 9341

Published: Oct. 12, 2022

Language: Английский

Citations

5
Synthesis and characterisation of novel chiral smectic liquid crystalline elastomers containing menthol dimer-type side chain DOI
Ying Jiang, Yiming Gao, Zirui Lin

et al.

Liquid Crystals, Journal Year: 2018, Volume and Issue: 45(12), P. 1783 - 1794

Published: June 20, 2018

A series of siloxane-based chiral smectic liquid crystalline elastomers (ChSLCEs) formed by a dimer-type monomer (M1), (M2) and cross-linker (CL) were reported. M1 M2 both new crystals with dimer structures, their chemical structures purities characterised Fourier transform infrared spectra 1H NMR. The thermal stability mesomorphism monomers, ChSLCEs examined different analytical techniques. results showed monomers exhibited excellent properties. combination phases from the two side chains endowed obtained good effect dosages cross-linkers on mesomorphic properties was also examined. temperature ranges mesophase-isotropic narrowed increasing addition according to differential scanning calorimetry. All gravity analysis results. effective cross-link densities calculated swelling experiments give fact that molecular weights between cross-linking points decrease increase cross-linkers. Novel achiral (M2), an crosslinking agent have been synthesized form chain LCE1-LCE7 graft copolymerization poly(methylhydrogeno)siloxane backbone

Language: Английский

Citations

6
Engineering Achiral Liquid Crystalline Polymers for Chiral Self-Recovery DOI Open Access

Tengfei Miao,

Xiaoxiao Cheng,

Yilin Qian

et al.

International Journal of Molecular Sciences, Journal Year: 2021, Volume and Issue: 22(21), P. 11980 - 11980

Published: Nov. 5, 2021

Flexible construction of permanently stored supramolecular chirality with stimulus-responsiveness remains a big challenge. Herein, we describe an efficient method to realize the transfer and storage in intrinsically achiral films side-chain polymeric liquid crystal system by combining chiral doping cross-linking strategy. Even helical structure was destroyed UV light irradiation, memorized information covalent network enabled complete self-recovery original superstructure. These results allowed building novel chiroptical switch without any additional source multiple types polymers, which may be one competitive candidates for use stimulus-responsive chiro-optical devices.

Language: Английский

Citations

5