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Wu Y, Zhao Y, Wang D. Preparation of Progressive Driving Bilayer Polymer-Dispersed Liquid Crystals Possessing a PDLC-PVA-PDLC Structure. Molecules 2024; 29:508. [PMID: 38276586 PMCID: PMC10819776 DOI: 10.3390/molecules29020508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 01/27/2024] Open
Abstract
In this paper, the bilayer polymer-dispersed liquid crystals possessing a PDLC-PVA-PDLC structure were prepared by integrating two monolayer PDLCs. The effect of the polymer mesh size on the electro-optical properties of a bilayer PDLC was investigated by comparing the micro-morphology and electro-optical curves under different polymerization conditions. In addition, the impact of doping MoO2 nanoparticles with surface modification on the comprehensive performance of the bilayer PDLC was further researched. The contrast ratio of the bilayer PDLC prepared under the optimal conditions was improved by more than 90% and still maintained excellent progressive driving performance. Therefore, the development of a bilayer PDLC with optimal electro-optical properties will significantly enhance the technological prospects for the application of PDLC-based devices in smart windows, displays, and flexible devices.
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Affiliation(s)
- Yongle Wu
- Xi’an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, School of Electronic Information, Xijing University, Xi’an 710123, China; (Y.W.); (Y.Z.)
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Yuzhen Zhao
- Xi’an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, School of Electronic Information, Xijing University, Xi’an 710123, China; (Y.W.); (Y.Z.)
| | - Dong Wang
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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Li Y, Pan P, Liu C, Zhou W, Li C, Gong C, Li H, Zhang L, Song H. Influence of chain interaction and ordered structures in polymer dispersed liquid crystalline membranes on thermal conductivity. JOURNAL OF POLYMER ENGINEERING 2020. [DOI: 10.1515/polyeng-2020-0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Polymer dispersed liquid crystalline (PDLC) membrane with intrinsic thermal conductivity was prepared by dispersing liquid crystalline polysiloxane containing crosslinked structure (liquid crystalline polysiloxane elastomer (LCPE)) into polyvinyl alcohol (PVA). Chemical structures were characterized by Fourier transform infrared (FT-IR) and 1H-NMR, and microscopic structures were analyzed by polarizing optical microscope (POM), scanning electron microscope (SEM) and X-ray diffraction (XRD). The thermal conductivity of PDLC membrane was characterized by hot disk thermal constants analyzer, and the tensile properties were measured by tensile testing machine. Thermal properties were characterized by differential scanning calorimeter (DSC) and thermal gravimetric analyzer (TGA). The results show that LCPE was dispersed in PVA uniformly, and the mesogenic monomer of LCPE formed microscopic ordered structures in PDLC membrane. Meanwhile, hydrogen-bond interaction was formed between LCPE and PVA chain. Both microscopic-ordered structure and the hydrogen-bond interaction improved the phonon transmission path, and the thermal conductivity of PDLC membrane was up to 0.74 W/m⋅K, which was 6 times higher than that of pure PVA film. PDLC membrane possessed proper tensile strength and elongation at break, respectively 5.18 MPa and 338%. As a result, PDLC membrane can be used as thermal conductive membrane in electronic packaging and other related fields.
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Affiliation(s)
- Ying Li
- College of Material Science and Engineering , Xi’an University of Science and Technology , Xi’an , 710054, Shaan Xi , China
| | - Pan Pan
- College of Material Science and Engineering , Xi’an University of Science and Technology , Xi’an , 710054, Shaan Xi , China
| | - Chao Liu
- College of Material Science and Engineering , Xi’an University of Science and Technology , Xi’an , 710054, Shaan Xi , China
| | - Wenying Zhou
- School of Chemistry and Chemical Engineering , Xi’an University of Science and Technology , Xi’an , 710054, China
| | - Chenggong Li
- College of Material Science and Engineering , Xi’an University of Science and Technology , Xi’an , 710054, Shaan Xi , China
| | - Changdan Gong
- College of Material Science and Engineering , Xi’an University of Science and Technology , Xi’an , 710054, Shaan Xi , China
| | - Huilu Li
- College of Material Science and Engineering , Xi’an University of Science and Technology , Xi’an , 710054, Shaan Xi , China
| | - Liang Zhang
- The First Affiliated Hospital , Xi’an Jiaotong University , Xi’an , 710061, Shaan Xi , China
| | - Hui Song
- College of Material Science and Engineering , Xi’an University of Science and Technology , Xi’an , 710054, Shaan Xi , China
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Bélaid ZH, Ben Mansour S, Boroguiaa D, Boubris A, Benhabib L, Benkhaled FZ, Mechernene L. Electro-Optical and Thermophysical Characterization of Poly (Tripropylene Glycol Di-Acrylate)/Liquid Crystal Composite Materials Prepared by Polymerization Induced Phase Separation. J MACROMOL SCI B 2020. [DOI: 10.1080/00222348.2020.1796013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Z. Hadjou Bélaid
- Laboratoire de Recherche sur les Macromolécules, Département de Physique, Faculté des Sciences, Université de Tlemcen, Tlemcen, Algérie
| | - S. Ben Mansour
- Laboratoire de Recherche sur les Macromolécules, Département de Physique, Faculté des Sciences, Université de Tlemcen, Tlemcen, Algérie
| | - D. Boroguiaa
- Laboratoire de Recherche sur les Macromolécules, Département de Physique, Faculté des Sciences, Université de Tlemcen, Tlemcen, Algérie
| | - A. Boubris
- Laboratoire de Recherche sur les Macromolécules, Département de Physique, Faculté des Sciences, Université de Tlemcen, Tlemcen, Algérie
| | - L. Benhabib
- Materials and Renewable Energy Research Unit, Abu Bakar Belkaid University of Tlemcen, Algeria
| | - F. Z. Benkhaled
- Laboratoire de Recherche sur les Macromolécules, Département de Physique, Faculté des Sciences, Université de Tlemcen, Tlemcen, Algérie
| | - L. Mechernene
- Laboratoire de Recherche sur les Macromolécules, Département de Physique, Faculté des Sciences, Université de Tlemcen, Tlemcen, Algérie
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Garbovskiy Y, Glushchenko A. Introduction to the Special Issue of the Journal of Molecular Liquids Dedicated to the Memory of Professor Yuriy Reznikov. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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