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Na Y, Kwac LK, Kim HG, Joo YL, Chang JH. Effects of organoclay on colorless and transparent polyimide nanocomposites: thermomechanical properties, morphology, and optical transparency. RSC Adv 2023; 13:16285-16292. [PMID: 37266490 PMCID: PMC10230512 DOI: 10.1039/d3ra01809a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 05/16/2023] [Indexed: 06/03/2023] Open
Abstract
Although aromatic polyimide (PI) exhibits excellent mechanical performance and thermal stability, its dark color limits applicability in optical displays. Therefore, it is desirable to manufacture colorless, transparent PI (CPI) nanocomposite films that retain excellent physical properties. In this study, a solution intercalation method was used to disperse organoclay (Cloisite 25A; CS25A) in poly(amic acid), which was prepared using 4,4'-oxydiphthalic dianhydride and 3,4'-oxydianiline as monomers. This dispersion was then subjected to thermal imidization to synthesize CPI hybrid films. The influence of the CS25A content (0-1.00 wt%) on the thermomechanical properties, optical transmittance, and morphology of the prepared films was investigated. The hybrid film with a CS25A content of 0.50 wt% exhibited the best thermomechanical properties. However, upon further increasing the organoclay content to 1.00 wt%, the physical properties deteriorated. At 0.50 wt% CS25A, some agglomeration occurred but most of the clay was well dispersed as nano-sized particles, as revealed by transmission electron microscopy. In contrast, when the CS25A content exceeded a critical content, most of the clay was agglomerated and the physical properties were reduced. All the obtained CPI hybrid films were colorless and transparent, regardless of the organoclay content.
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Affiliation(s)
- Yeji Na
- Graduate School of Carbon Convergence Engineering, Jeonju University Jeonju 55069 Korea
| | - Lee Ku Kwac
- Graduate School of Carbon Convergence Engineering, Jeonju University Jeonju 55069 Korea
- Institute of Carbon Technology, Jeonju University Jeonju 55069 Korea
| | - Hong Gun Kim
- Graduate School of Carbon Convergence Engineering, Jeonju University Jeonju 55069 Korea
- Institute of Carbon Technology, Jeonju University Jeonju 55069 Korea
| | - Yong Lak Joo
- Robert Fredrick Smith School of Chemical and Biomolecular Engineering, Cornell University Ithaca NY 14853 USA
| | - Jin-Hae Chang
- Institute of Carbon Technology, Jeonju University Jeonju 55069 Korea
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Ghorai A, Banerjee S. Phosphorus-Containing Aromatic Polymers: Synthesis, Structure, Properties and Membrane-Based Applications. Prog Polym Sci 2023. [DOI: 10.1016/j.progpolymsci.2023.101646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Zhang T, Yang Z, Piao F, Guo H. Transparent polyimide films with ultra-low coefficient of thermal expansion. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083221097384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
According to the application requirements of colorless transparent polyimide (CPI) film for low coefficient of thermal expansion (CTE) in the field of OLED display, the new aromatic dianhydride monomers with amide bond structure were synthesized, namely s-ABDA, i-ABDA, EADA. Furthermore, a series of CPI films were prepared by two-step method from the reaction of as-synthesized dianhydrides with 2.2′-bis (trifluoromethyl) −4.4′-diaminobiphenyl (TFMB) or trans-1.4′-cyclohexanediamine ( t-CHDA). Based on the analysis of performance results, the incorporation of amide group and biphenyl, benzene or ether bond into dianhydride monomer helped this new type of transparent polyimide film with excellent optical properties (T550 nm> 88%), great heat stability (CTE < 4.4 ppm/K; Tg > 314°C; Td5% > 478°C) and good mechanical strength (σ > 208 MPa). The film s-ABDA/TFMB showed ultra-low CTE value at 4.4 ppm/K, aligning with the maximum birefringence, indicating that the role of hydrogen bonding was of great benefit to the regulation of thermal expansion.
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Affiliation(s)
- Tingting Zhang
- College of Science, Yanbian University, Yanji 133000, China
| | - Zhenghui Yang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Fengyu Piao
- College of Science, Yanbian University, Yanji 133000, China
| | - Haiquan Guo
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
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Bai W, Lu Y, Hu Z, Xiao G, Zhao H, Zhu J, Liu Z. Photoluminescence, thermal and surface properties of triarylimidazole-containing polyimide nanocomposite films. RSC Adv 2021; 11:36066-36077. [PMID: 35492777 PMCID: PMC9043153 DOI: 10.1039/d1ra07147e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 11/01/2021] [Indexed: 11/21/2022] Open
Abstract
In this work, a triarylimidazole-containing diamine 2-(4-methylphenyl)-4,5-bis(4-(4-amino-2-trifluoromethylphenoxy)phenyl)imidazole (MPBAI) was firstly synthesized and polymerized with 1,2,3,4-cyclobutanetetracarboxylic dianhydride (CBDA) to prepare transparent polyimide (PI) films by means of thermal imidization. Then, inorganic nanoparticles including silica (SiO2), alumina (Al2O3) and silicon nitride (Si3N4) were separately introduced into the PI(MPBAI-CBDA) with different mass fractions of 0.02%, 0.10%, 0.50% and 2.50% to obtain three series of PI nanocomposite films. All these films were close to colorless and transparent, although the light transmittance showed a downward trend due to the introduction of nanoparticles. Moreover, as the content of inorganic nanoparticles increased, the fluorescence intensities of these films were increased. Comparatively, the improvement effect of nano-SiO2 was the most obvious. When the content of SiO2 was 2.50%, the maximum intensity of the fluorescence absorption peak was increased by 9.6 times, and the absolute fluorescence quantum yield reached 17.2%, about 5.2 times that of the original PI film. Moreover, the maximum absorption peak produced a red shift of 85 nm due to the addition of 2.50% Si3N4, which was probably caused by the weakening of fluorescence quenching effect and high permittivity. The nanocomposites exhibited high glass transition temperatures of around 300 °C and excellent thermal stabilities. The surface hydrophobicity was changed by adjusting the mass and type of nanoparticles. Thus, this work provided a simple way to improve the photoluminescence effect by introducing the nanoparticles. The functional films will be expected to be applied in some optical applications.
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Affiliation(s)
- Wu Bai
- School of Chemical Engineering, University of Science and Technology Liaoning Anshan Liaoning P. R. China
| | - Yunhua Lu
- School of Chemical Engineering, University of Science and Technology Liaoning Anshan Liaoning P. R. China
| | - Zhizhi Hu
- School of Chemical Engineering, University of Science and Technology Liaoning Anshan Liaoning P. R. China
- Oxiranchem Holding Group Co. Ltd Liaoyang Liaoning P. R. China
| | - Guoyong Xiao
- School of Chemical Engineering, University of Science and Technology Liaoning Anshan Liaoning P. R. China
| | - Hongbin Zhao
- School of Chemical Engineering, University of Science and Technology Liaoning Anshan Liaoning P. R. China
- Oxiranchem Holding Group Co. Ltd Liaoyang Liaoning P. R. China
| | - Jianmin Zhu
- Oxiranchem Holding Group Co. Ltd Liaoyang Liaoning P. R. China
| | - Zhaobin Liu
- Oxiranchem Holding Group Co. Ltd Liaoyang Liaoning P. R. China
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Huang J, Zhang G, Dong B, Liu J. Synthesis and Properties of Polyimide Silica Nanocomposite Film with High Transparent and Radiation Resistance. NANOMATERIALS 2021; 11:nano11030562. [PMID: 33668194 PMCID: PMC7995970 DOI: 10.3390/nano11030562] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/14/2021] [Accepted: 02/21/2021] [Indexed: 11/16/2022]
Abstract
In order to prepare flexible glass cover sheet materials suitable for space solar cells, fluorinated diamine 2,2’-bistrifluoromethyl benzidine (TFDB) and fluorinated dianhydride 4,4’ (hexafluoroisopropyl) diphthalic dianhydride (6FDA) as the monomer, polyimide (PI)/SiO2 composite film was synthesized by in situ polymerization, and the influence of coupling agent and SiO2 nanoparticle content on the film structure and properties was studied. The results show that PI synthesized from fluorine-containing monomers has better light transmittance, and the highest transmittance can reach 91.4%. The average visible light transmittance of the composite film decreases with the increase of SiO2 content, and the transmittance of the film decreases less in the high-wavelength region and greatly decreases in the low-wavelength region. The tensile strength and elastic modulus of PI/SiO2 composite film increase with the increase of SiO2 content, first increase and then decrease, reaching the maximum when the content is 10%; while the elongation at break of the composite film gradually increases with the increase of SiO2 content reduce. The thermal stability of PI/SiO2 composite film increases with the increase of SiO2 content. The doping of nano-SiO2 significantly suppresses the influence of irradiation on the mechanical properties of the film.
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Affiliation(s)
- Jindong Huang
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (G.Z.); (B.D.)
- School of Physical Science and Technology, Tiangong University, Tianjin 300387, China
| | - Guanglu Zhang
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (G.Z.); (B.D.)
- School of Physical Science and Technology, Tiangong University, Tianjin 300387, China
| | - Beiping Dong
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (G.Z.); (B.D.)
| | - Juncheng Liu
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (G.Z.); (B.D.)
- Correspondence: ; Tel.: +86-(0)-22-83-955-811
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Zhao W, Xu Y, Song C, Chen J, Liu X. Polyimide/mica hybrid films with low coefficient of thermal expansion and low dielectric constant. E-POLYMERS 2019. [DOI: 10.1515/epoly-2019-0019] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractPolyimide (PI)/mica hybrid films were successfully prepared by in situ condensation polymerization method, in which the mica particles were modified by coupling agent γ-aminopropyltriethoxy silane (APTS) to strengthen the interaction between the mica particles and PI matrix. The morphology, structure, thermal and mechanical properties as well as dielectric properties of PI films were systematically studied via Scanning electron microscope (SEM), Fourier transform infrared spectrometer (FT-IR spectrometer), Thermal gravimetric analysis (TGA), tensile experiments, Thermal mechanical analyzer (TMA), impedance analyzer, etc. The results indicated that the mica particles were dispersed homogeneously in PI matrix, leading to an improvement of the mechanical property, thermal stability and hydrophobicity. It was novel to notice that hybrid films exhibited low coefficient of thermal expansion (CTE) and low dielectric constant simultaneously. The CTE and dielectric constant of hybrid film dropped to 25.36 ppm/k and 2.42 respectively, in the presence of 10 wt% mica into polyimide matrix.
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Affiliation(s)
- Wei Zhao
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing210094, China
| | - Yong Xu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing210094, China
| | - Chaoran Song
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing210094, China
| | - Jian Chen
- Research Centre, Nanjing Zhong hong Running Advanced Material Technology Co., Ltd, Nanjing210094, China
| | - Xiaohong Liu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing210094, China
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Shin HI, Kwark YJ, Chang JH. Colorless and Transparent Copolyimides and Their Nanocomposites: Thermo-Optical Properties, Morphologies, and Gas Permeabilities. Polymers (Basel) 2019; 11:polym11040585. [PMID: 30960570 PMCID: PMC6523893 DOI: 10.3390/polym11040585] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 03/25/2019] [Accepted: 03/26/2019] [Indexed: 11/26/2022] Open
Abstract
A series of linear aromatic copolyimides (Co-PIs) were synthesized by reacting 4,4′-biphthalic anhydride (BPA) with various molar contents of 2,2′-bis(trifluoromethyl)benzidine (TFB) and p-xylylenediamine (p-XDA) in N,N′-dimethylacetamide (DMAc). Co-PI films were fabricated by solution casting and thermal imidization with poly(amic acid) (PAA) on glass plates. The thermo-optical properties and gas permeabilities of Co-PI films composed of various molar ratios of p-XDA (0.2–1.0 relative to BPA) were investigated. Thermal properties were observed to deteriorate with increasing p-XDA concentration. However, oxygen-transmission rates (O2TRs) and optical transparencies improved with increasing p-XDA concentration. Co-PI hybrids with a 1:0.2:0.8 molar ratio of BPA:TFB:p-XDA and organically modified hectorite (STN) were prepared by the in situ intercalation method. The morphologies and the thermo-optical and gas permeation properties of the hybrids were examined as functions of STN loading (5–50 wt %). XRD and TEM revealed substantial increases in clay particle agglomeration in the Co-PI hybrid films as the clay loading was increased from 5 to 50 wt %. The coefficient of thermal expansion (CTE) and the O2TR of a Co-PI hybrid film were observed to improve with increasing STN concentration; however, its optical transparency decreased gradually with increasing STN concentration.
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Affiliation(s)
- Hyeon Il Shin
- Department of Polymer Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea.
| | - Young-Je Kwark
- Department of Organic Materials and Fiber Engineering, Soongsil University, Seoul 06978, Korea.
| | - Jin-Hae Chang
- Department of Polymer Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea.
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Ionic liquid embedded polyimides with ultra-foldability, ultra-flexibility, ultra-processability and superior optical transparency. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.08.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Synthesis and characterization of phosphorus- and sulfur-containing aromatic polyimides for high refractive index. POLYMER 2018. [DOI: 10.1016/j.polymer.2017.12.052] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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High thermal conductivity and low absorptivity/ emissivity properties of transparent fluorinated polyimide films. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-1974-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zhang E, Dai X, Dong Z, Qiu X, Ji X. Critical concentration and scaling exponents of one soluble polyimide—from dilute to semidilute entangled solutions. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.01.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Quaternary copolyimides with various monomer contents: Thermal property and optical transparency. Macromol Res 2014. [DOI: 10.1007/s13233-014-2165-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Choi CH, Sohn BH, Chang JH. Colorless and transparent polyimide nanocomposites: Comparison of the properties of homo- and co-polymers. J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2013.01.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Min U, Yoon CS, Chang JH. Characterizations of transparent polyimide nanocomposite films with various equibiaxial stretching ratios: Optical transparency, morphology, and oxygen permeability. J Appl Polym Sci 2012. [DOI: 10.1002/app.35368] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Choi IH, Chang JH. Colorless polyimide nanocomposite films containing hexafluoroisopropylidene group. POLYM ADVAN TECHNOL 2011. [DOI: 10.1002/pat.1565] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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