1
|
Zhou S, Zhang L, Zou L, Ayubi BI, Wang Y. Mechanisms of Atomic Oxygen Erosion in Fluorinated Polyimides Investigated by Molecular Dynamics Simulations. Molecules 2024; 29:4485. [PMID: 39339480 PMCID: PMC11433985 DOI: 10.3390/molecules29184485] [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: 09/03/2024] [Revised: 09/15/2024] [Accepted: 09/18/2024] [Indexed: 09/30/2024] Open
Abstract
Traditional polyimides have highly conjugated structures, causing significant coloration under visible light. Fluorinated colorless polyimides, known for their light weight and excellent optical properties, are considered ideal for future aerospace optical lenses. However, their lifespan in low Earth orbit is severely limited by high-density atomic oxygen (AO) erosion, and the degradation behavior of fluorinated polyimides under AO exposure is not well understood. This study uses reactive molecular dynamics simulations to model two fluorinated polyimides, PMDA-TFMB and 6FDA-TFMB, with different fluorine contents, to explore their degradation mechanisms under varying AO concentrations. The results indicate that 6FDA-TFMB has slightly better resistance to erosion than PMDA-TFMB, mainly due to the enhanced chemical stability from its -CF3 groups. As AO concentration increases, widespread degradation of the polyimides occurs, with AO-induced cleavage and temperature-driven pyrolysis happening simultaneously, producing CO and OH as the main degradation products. This study uncovers the molecular-level degradation mechanisms of fluorinated polyimides, offering new insights for the design of AO erosion protection systems.
Collapse
Affiliation(s)
| | - Li Zhang
- School of Electrical Engineering, Shandong University, Jinan 250061, China
| | | | | | | |
Collapse
|
2
|
Zhang T, Wang S, Chai Y, Yu J, Zhu W, Li L, Li B. Prediction and Interpretability Study of the Glass Transition Temperature of Polyimide Based on Machine Learning with Quantitative Structure-Property Relationship ( Tg-QSPR). J Phys Chem B 2024; 128:8807-8817. [PMID: 38979707 DOI: 10.1021/acs.jpcb.4c00756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
The glass transition temperature (Tg) is a crucial characteristic of polyimides (PIs). Developing a Tg predictive model using machine learning methodologies can facilitate the design of PI structures and expedite the development process. In this investigation, a data set comprising 1257 PIs was assembled, with Tg values determined using differential scanning calorimetry. 210 molecular descriptors were computed using RDKit, and subsequently, six distinct feature selection methodologies were employed to refine the descriptor set. Quantitative structure-property relationship models targeting Tg (Tg-QSPR) were then constructed using five ensemble learning algorithms and one deep learning algorithm. These models exhibited high predictive accuracy and robustness, with the CATBoost model demonstrating the highest accuracy, achieving a coefficient of determination of 0.823 for the test set, a mean absolute error of 20.1 °C, and a root-mean-square error of 29.0 °C. The study identified the NumRotatableBonds descriptor as particularly influential on Tg, showing a negative correlation with the property. Additionally, the model's accuracy was validated using ten new PI films not included in the original data set, resulting in absolute errors ranging from 2.5 to 26.9 °C and absolute percentage error rates of 1.0-12.8%. These findings underscore the importance of utilizing extensive and diverse data sets for predictive modeling to enhance accuracy and stability. Furthermore, exploring the interpretability of the model and experimentally validating newly synthesized PIs have augmented the practical utility of the model. Under the guidance of the Tg-QSPR models, it will be possible to accelerate the performance prediction and structural design of PIs in the future.
Collapse
Affiliation(s)
- Tianyong Zhang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin 300354, China
| | - Suisui Wang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Yamei Chai
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Jianing Yu
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Wenxuan Zhu
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Liang Li
- College of Intelligence and Computing, Tianjin University, Tianjin 300350, China
| | - Bin Li
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
- Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin 300354, China
| |
Collapse
|
3
|
Gao Y, Peng W, Wei JA, Guo D, Zhang Y, Yu Q, Wang C, Wang L. Synthesis of High-Performance Colorless Polyimides with Asymmetric Diamine: Application in Flexible Electronic Devices. ACS APPLIED MATERIALS & INTERFACES 2024; 16:48005-48015. [PMID: 39191511 DOI: 10.1021/acsami.4c09667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
Colorless polyimides (CPIs) are widely used as high-performance materials in flexible electronic devices. From a molecular design standpoint, the industry continues to encounter challenges in developing CPIs with desired attributes, including exceptional optical transparency, excellent thermal stability, and enhanced mechanical strength. This study presents and validates a method for controlling 2-substituents, with a specific emphasis on examining how these substituents affect the thermal, mechanical, optical, and dielectric characteristics of CPIs. The presence of two CF3 groups on the same side of the diamine structure ensured the transmittance of the film. The charge transfer effect and the molecular distance are dynamically regulated by changing the 2-substituent (-OCH3/-CH3/H/F). The polyimide exhibited a well-maintained equilibrium between transparency and thermal stability, with a T500nm value ranging from 86.2 to 89.6% in the visible region, and a glass transition temperature (Tg) ranging from 358.6 to 376.0 °C. Additionally, the 6FDA-2-MTFMB compound, when combined with methyl, excels as a protective layer and base material, exhibiting excellent performance in various aspects. It has been verified as an appropriate option for flexible photodetectors and wearable piezoresistive sensors. In summary, this systematic investigation will provide a comprehensive and demonstrative methodology for developing CPIs that are capable of adapting to flexible electronic devices.
Collapse
Affiliation(s)
- Yanyu Gao
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Weifeng Peng
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Ji-An Wei
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Dechao Guo
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Yunjie Zhang
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Qianqian Yu
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
| | - Cheng Wang
- Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 515200, China
| | - LinGe Wang
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology, Guangzhou 510640, China
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| |
Collapse
|
4
|
Grabowska A, Fuentes Pineda R, Spinelli P, Soto Pérez G, Vinocour Pacheco FA, Babu V. Development of Lightweight and Flexible Perovskite Solar Cells on Ultrathin Colorless Polyimide Foils. ACS APPLIED MATERIALS & INTERFACES 2024; 16:48676-48684. [PMID: 39190646 DOI: 10.1021/acsami.4c11355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
The development of Perovskite Solar Cells (PSCs) on flexible substrates marks a significant advancement in thin-film photovoltaic technology. However, current state-of-the-art research predominantly utilizes Poly(ethylene terephthalate) (PET) substrate, which limits the deployment to less challenging environments. To address this limitation, we explore the fabrication of inverted PSCs on colorless polyimide (CPI) substrates that can withstand harsh environmental conditions. We employed a sequential sputtering technique to deposit indium tin oxide (bottom electrode) and nickel oxide (hole transport layer) as a base stack for the perovskite. This base layer was further enhanced by incorporating MeO-2PACz into the hole transport bilayer, significantly improving the NiOx interface, and thereby enhancing the efficiency of the devices. The PSCs fabricated on CPI demonstrated a power conversion efficiency (PCE) of 15.52% and a remarkable power-to-weight ratio (PWR) of 4.39 W/g, which is five times higher than that of devices on PET (0.87 W/g). Moreover, the active stack developed in this study can be used on any transparent substrate, showing its broader application potential.
Collapse
Affiliation(s)
| | | | - Pierpaolo Spinelli
- Saule Technologies, Wroclaw 54-427, Poland
- Saule Research Institute, Wroclaw 54-427, Poland
| | | | | | - Vivek Babu
- Saule Technologies, Wroclaw 54-427, Poland
| |
Collapse
|
5
|
Li L, Jiang W, Yang X, Meng Y, Hu P, Huang C, Liu F. From Molecular Design to Practical Applications: Strategies for Enhancing the Optical and Thermal Performance of Polyimide Films. Polymers (Basel) 2024; 16:2315. [PMID: 39204535 PMCID: PMC11359642 DOI: 10.3390/polym16162315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2024] [Revised: 08/03/2024] [Accepted: 08/13/2024] [Indexed: 09/04/2024] Open
Abstract
Polyimide (PI) films are well recognized for their outstanding chemical resistance, radiation resistance, thermal properties, and mechanical strength, rendering them highly valuable in advanced fields such as aerospace, sophisticated electronic components, and semiconductors. However, improving their optical transparency while maintaining excellent thermal properties remains a significant challenge. This review systematically checks over recent advancements in enhancing the optical and thermal performance of PI films, focusing on various strategies through molecular design. These strategies include optimizing the main chain, side chain, non-coplanar structures, and endcap groups. Rigid and flexible structural characteristics in the proper combination can contribute to the balance thermal stability and optical transparency. Introducing fluorinated substituents and bulky side groups significantly reduces the formation of charge transfer complexes, enhancing both transparency and thermal properties. Non-coplanar structures, such as spiro and cardo configurations, further improve the optical properties while maintaining thermal stability. Future research trends include nanoparticle doping, intrinsic microporous PI polymers, photosensitive polyimides, machine learning-assisted molecular design, and metal coating techniques, which are expected to further enhance the comprehensive optical and thermal performance of PI films and expand their applications in flexible displays, solar cells, and high-performance electronic devices. Overall, systematic molecular design and optimization have significantly improved the optical and thermal performance of PI films, showing broad application prospects. This review aims to provide researchers with valuable references, stimulate more innovative research and applications, and promote the deep integration of PI films into modern technology and industry.
Collapse
Affiliation(s)
- Liangrong Li
- Fuzhou Medical School, Nanchang University, Fuzhou 344000, China; (L.L.); (W.J.); (X.Y.)
| | - Wendan Jiang
- Fuzhou Medical School, Nanchang University, Fuzhou 344000, China; (L.L.); (W.J.); (X.Y.)
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Xiaozhe Yang
- Fuzhou Medical School, Nanchang University, Fuzhou 344000, China; (L.L.); (W.J.); (X.Y.)
| | - Yundong Meng
- Jiangxi Shengyi Technology Co., Ltd., Jiujiang 332005, China; (Y.M.); (P.H.); (C.H.)
| | - Peng Hu
- Jiangxi Shengyi Technology Co., Ltd., Jiujiang 332005, China; (Y.M.); (P.H.); (C.H.)
| | - Cheng Huang
- Jiangxi Shengyi Technology Co., Ltd., Jiujiang 332005, China; (Y.M.); (P.H.); (C.H.)
| | - Feng Liu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
- Jiangxi Shengyi Technology Co., Ltd., Jiujiang 332005, China; (Y.M.); (P.H.); (C.H.)
| |
Collapse
|
6
|
Kim SK, Cho EM, Seok HJ, Kim YY, Choi DH, Lee SJ, Jeon NJ, Kim HK. Highly flexible and transparent colorless polyimide substrate sandwiched between plasma polymerized fluorocarbon and InGaTiO for high performance flexible perovskite solar cells. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2024; 25:2373041. [PMID: 39169917 PMCID: PMC11338216 DOI: 10.1080/14686996.2024.2373041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 06/13/2024] [Accepted: 06/23/2024] [Indexed: 08/23/2024]
Abstract
We integrated transparent antireflective coatings and transparent electrodes onto flexible colorless polyimide (CPI) substrates to fabricate high-performance flexible perovskite solar cells. Multifunctional PPFC/CPI/IGTO substrates were fabricated by sputtering the optimal plasma-polymerized fluorocarbon (PPFC) antireflective coating and InGaTiO (IGTO) electrode films on both sides of the CPI substrate. By applying PPFC with a low refractive index (1.38) as an antireflective coating, the transparency of the PPFC/CPI/IGTO substrate increased by an additional 1.2%. In addition, owing to the amorphous characteristics of the PPFC and IGTO layers, the PPFC/CPI/IGTO substrate showed constant sheet resistance and transmittance change even after 10,000 cycles during the bending tests. The flexible perovskite solar cells, fabricated on the PPFC/CPI/IGTO substrate, exhibited an increase in current density of 1.48 mA/cm2 after the deposition of the PPFC antireflective coating. These results confirmed that the PPFC/CPI/IGTO substrate was durable against high-temperature treatment, flexible, and exhibited excellent electrical characteristics. This enhanced the efficiency and durability of the flexible perovskite solar cells. Moreover, the hydrophobic PPFC layer allowed the self-cleaning of inflexible perovskite solar cells. Given these attributes, the PPFC/CPI/IGTO structure has been recognized as a good choice for multifunctional substrates of flexible perovskite solar cells, presenting the potential for enhancing performance.
Collapse
Affiliation(s)
- Su-Kyung Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon-si, Gyeonggi-do, Republic of Korea
| | - Eun-Mi Cho
- Chemical Materials Solution Center, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Hae-Jun Seok
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon-si, Gyeonggi-do, Republic of Korea
| | - Young-Yun Kim
- Chemical Materials Solution Center, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Dong-Hyeok Choi
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon-si, Gyeonggi-do, Republic of Korea
| | - Sang-Jin Lee
- Chemical Materials Solution Center, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Nam Joong Jeon
- Chemical Materials Solution Center, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Han-Ki Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon-si, Gyeonggi-do, Republic of Korea
| |
Collapse
|
7
|
Liu XC, Tian LY, Bao ZL, Zhang YS, Qian PF, Geng WH, Zhang D, Zhu Q, Geng HZ. Caffeic-Acid-Functionalized MWCNTs and PEDOT:PSS Formed Composite Flexible Films with "Reinforced Concrete" Structure for Electrical Heating and EMI Shielding. ACS APPLIED MATERIALS & INTERFACES 2024; 16:22391-22402. [PMID: 38647046 DOI: 10.1021/acsami.4c01373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Nowadays, flexible multifunctional composites are attracting much attention and are practically being used in various emerging electronic devices. However, most composites suffer from the disadvantages of high loadings of conductive fillers, complicated preparation processes, and low energy conversion efficiency. In this article, Caffeic acid-modified multiwalled carbon nanotubes (C-MWCNTs)/poly(3,4-ethylene dioxythiophene):polystyrene sulfonic acid (PEDOT:PSS)/polyimide (PI) composite films (CPFs) were prepared using a simple layer-by-layer deposition method. The "reinforced concrete" structure of the C-MWCNTs/PEDOT:PSS layer ensures high electrical conductivity of the film, while the PI layer provides excellent mechanical properties (72.69 MPa). The composite film exhibits excellent electrothermal response and thermal stability up to approximately 125 °C at 5 V. In addition, the good conductivity of the film provides its electromagnetic shielding effectiveness (32.69 dB). With these advantages, we expect that flexible CPFs will be widely utilized in wearable devices, electromagnetic interference (EMI) shielding applications, and thermal management of personal or electronic devices.
Collapse
Affiliation(s)
- Xuan-Chen Liu
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Lu-Yao Tian
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Ze-Long Bao
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Yi-Song Zhang
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Peng-Fei Qian
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Wen-Hao Geng
- Tianji Zhencai Technology (Hebei) Co., Ltd., Cangzhou 061000, China
| | - Di Zhang
- Cangzhou Institute of Tiangong University, Cangzhou 061000, China
| | - Qingxia Zhu
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
- Tianji Zhencai Technology (Hebei) Co., Ltd., Cangzhou 061000, China
| | - Hong-Zhang Geng
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
- Tianji Zhencai Technology (Hebei) Co., Ltd., Cangzhou 061000, China
- Cangzhou Institute of Tiangong University, Cangzhou 061000, China
| |
Collapse
|
8
|
Na Y, Kang S, Kwac LK, Kim HG, Chang JH. Monomer Dependence of Colorless and Transparent Polyimide Films: Thermomechanical Properties, Optical Transparency, and Solubility. ACS OMEGA 2024; 9:12195-12203. [PMID: 38497003 PMCID: PMC10938391 DOI: 10.1021/acsomega.4c00175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/07/2024] [Accepted: 02/14/2024] [Indexed: 03/19/2024]
Abstract
Six poly(amic acid)s (PAAs) were synthesized by reacting bis(3-aminophenyl) sulfone with various dianhydride monomers such as pyromellitic dianhydride, 4,4'-biphthalic anhydride, dicyclohexyl-3,4,3',4'-tetracarboxylic dianhydride, 4,4'-oxidiphthalic anhydride, 3,3',4,4'-benzophenonetetracarboxylic dianhydride, and 4,4'-(hexafluoroisopropylidene) diphthalic anhydride. These PAAs were then converted to polyimide (PI) films by thermal imidization at various temperatures. To obtain colorless and transparent PI (CPI), the dianhydride monomer used in this study had an overall bent structure, a structure containing a strong electron-withdrawing -CF3 substituent or an alicyclic ring. In addition, some monomers contained ether or ketone functional groups in their bent structures. The thermomechanical properties, optical transparency, and solubility of CPI films with six different dianhydride monomer structures were investigated, and the correlation between the monomer structure and CPI film properties was clarified. Overall, CPI with an aromatic main chain structure or a linear structure had excellent thermal and mechanical properties. In contrast, CPI with a bent structure containing functional groups or substituents in the main chain exhibited excellent optical transparency and solubility.
Collapse
Affiliation(s)
- Yeji Na
- Graduate
School of Carbon Convergence Engineering, Jeonju University, Jeonju 55069, Korea
| | - Sungsoo Kang
- 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
- Institute
of Carbon Technology, Jeonju University, Jeonju 55069, Korea
| | - Jin-Hae Chang
- Institute
of Carbon Technology, Jeonju University, Jeonju 55069, Korea
| |
Collapse
|
9
|
Yeob J, Hong SW, Koh WG, Park I. Enhanced Mechanical and Thermal Properties of Polyimide Films Using Hydrophobic Fumed Silica Fillers. Polymers (Basel) 2024; 16:297. [PMID: 38276705 PMCID: PMC10820428 DOI: 10.3390/polym16020297] [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: 12/18/2023] [Revised: 01/16/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024] Open
Abstract
Polyimide (PI) composite films with enhanced mechanical properties were prepared by incorporating modified fumed silica (FS) particles while preserving their optical and thermal characteristics. The PI matrix was synthesized using a fluorinated diamine, a fluorinated dianhydride, and a rigid biphenyl dianhydride via chemical imidization. Commercially available FS particles, including unmodified FS particles (0-FS) and particles modified with dimethyl (2-FS), trimethyl (3-FS), octyl (8-FS), octamethylcyclotetrasiloxane (D4-FS), and polydimethylsiloxane (PDMS-FS) were used. Scanning electron microscope images and nitrogen adsorption-desorption isotherms revealed well-defined porous structures in the FS particles. The water contact angles on the composite films increased compared to those of the pristine PI films, indicating improved water resistance. The PI/0-FS films exhibited a typical trade-off relationship between tensile modulus and elongation at break, as observed in conventional composites. Owing to the poor compatibility and agglomeration of the PDMS-FS particles, the PI/PDMS-FS composite films exhibited poor mechanical performance and diminished optical characteristics. Although the longer-chained FS particles (8- and D4-FS) improved the tensile modulus of the PI film by up to 12%, a reduction of more than 20% in toughness was observed. The PI composite films containing the methylated FS particles (2- and 3-FS) outperformed 8- and D4-FS in terms of mechanical properties, with PI/3-FS films showing an over 10% increased tensile modulus (from 4.07 to 4.42 GPa) and 15% improved toughness (from 6.97 to 8.04 MJ/m3) at 7 wt. % silica loading. Except for the PI/PDMS-FS composites, all composite film samples exhibited more than 86% transmittance at 550 nm. Regarding thermal properties, the glass transition temperature (Tg) and thermal stability remained stable for most composite films. In addition, PI/3-FS films demonstrated enhanced dimensional stability with lower coefficients of thermal expansion (from 47.3 to 34.5 ppm/°C). Overall, this study highlights the potential of incorporating specific modified FS particles to tailor the mechanical, optical, and thermal properties of PI composite films.
Collapse
Affiliation(s)
- Jongin Yeob
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea;
- Research Institute of Clean Manufacturing System, Korea Institute of Industrial Technology (KITECH), 89 Yangdaegiro-gil, Ipjang-myeon, Seobuk-gu, Cheonan-si 31056, Republic of Korea;
| | - Sung Woo Hong
- Research Institute of Clean Manufacturing System, Korea Institute of Industrial Technology (KITECH), 89 Yangdaegiro-gil, Ipjang-myeon, Seobuk-gu, Cheonan-si 31056, Republic of Korea;
| | - Won-Gun Koh
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea;
| | - In Park
- Research Institute of Clean Manufacturing System, Korea Institute of Industrial Technology (KITECH), 89 Yangdaegiro-gil, Ipjang-myeon, Seobuk-gu, Cheonan-si 31056, Republic of Korea;
- KITECH School, University of Science and Technology (UST), 176 Gajeong-dong, Yuseong-gu, Daejeon 34113, Republic of Korea
| |
Collapse
|
10
|
Hager CJ, McMillen CD, Sachdeva R, Martin AW, Thrasher JS. New Fluorine-Containing Diamine Monomers for Potentially Improved Polyimides. Molecules 2023; 28:6855. [PMID: 37836698 PMCID: PMC10574420 DOI: 10.3390/molecules28196855] [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: 09/06/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
Two new fluorine-containing diamine monomers were designed with the goal of reducing charge transfer complex (CTC) interactions between neighboring chains in polyimides (i.e., high transparency/low color) while hopefully maintaining the well-known thermal stability and flexibility generally associated with polyimides. The proposed diamines have been prepared through (1) the functionalization of 1,3-bis[(pentafluorobenzyl)oxy]benzene with 4-aminophenol and (2) the addition of 2-chloro-5-nitrobenzotrifluoride to 4,4'-bicyclohexanol followed by reduction of the resulting dinitro compound. The new compounds have been characterized by multinuclear NMR and IR spectroscopy and high-resolution liquid chromatography-mass spectrometry as well as single-crystal X-ray diffraction on the new diamine prepared from 4,4'-bicyclohexanol. Not only was the structure of the proposed new diamine confirmed, but another interesting example of hydrogen bonding between an N-H proton and the π-system of an aromatic ring was observed and documented. Initial polymerizations have been carried out via the two-step imidization process.
Collapse
Affiliation(s)
- Cassandra J. Hager
- Advanced Materials Research Laboratory, Department of Chemistry, Clemson University, 91 Technology Drive, Anderson, SC 29625, USA;
- Hunter Laboratory, Department of Chemistry, Clemson University, 211 S. Palmetto Blvd., Clemson, SC 29634, USA; (C.D.M.); (R.S.)
| | - Colin D. McMillen
- Hunter Laboratory, Department of Chemistry, Clemson University, 211 S. Palmetto Blvd., Clemson, SC 29634, USA; (C.D.M.); (R.S.)
| | - Rakesh Sachdeva
- Hunter Laboratory, Department of Chemistry, Clemson University, 211 S. Palmetto Blvd., Clemson, SC 29634, USA; (C.D.M.); (R.S.)
| | - Arthur W. Martin
- R & D Technical Center, Daikin America, Inc., 2749 Hwy 20 West, Suite A, Decatur, AL 35601, USA;
| | - Joseph S. Thrasher
- Advanced Materials Research Laboratory, Department of Chemistry, Clemson University, 91 Technology Drive, Anderson, SC 29625, USA;
- Hunter Laboratory, Department of Chemistry, Clemson University, 211 S. Palmetto Blvd., Clemson, SC 29634, USA; (C.D.M.); (R.S.)
| |
Collapse
|
11
|
Hasegawa M, Miyama T, Ishii J, Watanabe D, Uchida A. Colorless Polyimides Derived from 5,5'-bis(2,3-norbornanedicarboxylic anhydride): Strategies to Reduce the Linear Coefficients of Thermal Expansion and Improve the Film Toughness. Polymers (Basel) 2023; 15:3838. [PMID: 37765692 PMCID: PMC10535765 DOI: 10.3390/polym15183838] [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: 08/26/2023] [Revised: 09/12/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
In this paper, novel colorless polyimides (PIs) derived from 5,5'-bis(2,3-norbornanedicarboxylic anhydride) (BNBDA) were presented. The results of single-crystal X-ray structural analysis using a BNBDA-based model compound suggested that it had a unique steric structure with high structural linearity. Therefore, BNBDA is expected to afford new colorless PI films with an extremely high glass transition temperature (Tg) and a low linear coefficient of thermal expansion (CTE) when combined with aromatic diamines with rigid and linear structures (typically, 2,2'-bis(trifluoromethyl)benzidine (TFMB)). However, the polyaddition of BNBDA and TFMB did not form a PI precursor with a sufficiently high molecular weight; consequently, the formation of a flexible, free-standing PI film via the two-step process was inhibited because of its brittleness. One-pot polycondensation was also unsuccessful in this system because of precipitation during the reaction, probably owing to the poor solubility of the initially yielded BNBDA/TFMB imide oligomers. The combinations of (1) the structural modification of the BNBDA/TFMB system, (2) the application of a modified one-pot process, in which the conditions of the temperature-rising profile, solvents, azeotropic agent, catalysts, and reactor were refined, and (3) the optimization of the film preparation conditions overcame the trade-off between low CTE and high film toughness and afforded unprecedented PI films with well-balanced properties, simultaneously achieving excellent optical transparency, extremely high Tg, sufficiently high thermal stability, low CTE, high toughness, relatively low water uptake, and excellent solution processability.
Collapse
Affiliation(s)
- Masatoshi Hasegawa
- Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Chiba, Japan
| | - Takuya Miyama
- Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Chiba, Japan
| | - Junichi Ishii
- Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Chiba, Japan
| | - Daisuke Watanabe
- High Performance Materials Research & Development Department, High Performance Materials Company, ENEOS Corp., Yokohama 231-0815, Kanagawa, Japan
| | - Akira Uchida
- Department of Biomolecular Science, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Chiba, Japan
| |
Collapse
|
12
|
Ren X, Wang Z, He Z, Yang C, Qi Y, Han S, Chen S, Yu H, Liu J. Synthesis and Characterization of Organo-Soluble Polyimides Based on Polycondensation Chemistry of Fluorene-Containing Dianhydride and Amide-Bridged Diamines with Good Optical Transparency and Glass Transition Temperatures over 400 °C. Polymers (Basel) 2023; 15:3549. [PMID: 37688175 PMCID: PMC10490053 DOI: 10.3390/polym15173549] [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: 07/30/2023] [Revised: 08/16/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
Polymeric optical films with light colors, good optical transparency and high thermal resistance have gained increasing attention in advanced optoelectronic areas in recent years. However, it is somewhat inter-conflicting for achieving the good optical properties to the conventional thermal resistant polymers, such as the standard aromatic polyimide (PI) films, which are well known for the excellent combined properties and also the deep colors. In this work, a series of wholly aromatic PI films were prepared via the polycondensation chemistry of one fluorene-containing dianhydride, 9,9-bis(3,4-dicarboxyphenyl)fluorene dianhydride (FDAn) and several aromatic diamines with amide linkages in the main chain, including 9,9-bis [4-(4-aminobenzamide)phenyl]fluorene (FDAADA), 2,2'-bis(trifluoromethyl)-4,4'-bis[4-(4-aminobenzamide)] biphenyl (ABTFMB), and 2,2'-bis(trifluoromethyl)-4,4'-bis[4-(4-amino-3-methyl)benzamide] biphenyl (MABTFMB). The derived FLPI-1 (FDAn-FDAADA), FLPI-2 (FDAn-ABTFMB) and FLPI-3 (FDAn-MABTFMB) resins showed good solubility in the polar aprotic solvents, such as N-methyl-2-pyrrolidone (NMP), N,N-dimethylacetamide (DMAc) and dimethyl sulfoxide (DMSO). The solution-processing FDAn-PI films exhibited good optical transmittance over 80.0% at a wavelength of 500 nm (T500), yellow indices (b*) in the range of 1.01-5.20, and haze values lower than 1.0%. In addition, the FDAn-PI films showed low optical retardance with optical retardation (Rth) values in the range of 31.7-390.6 nm. At the same time, the FDAn-PI films exhibited extremely high glass transition temperatures (Tg) over 420 °C according to dynamic mechanical analysis (DMA) tests. The FDAn-PI films showed good dimensional stability at elevated temperatures with linear coefficients of thermal expansion (CTE) in the range of (31.8-45.8) × 10-6/K.
Collapse
Affiliation(s)
- Xi Ren
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Zhenzhong Wang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Zhibin He
- School of Material Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China; (Z.H.); (H.Y.)
| | - Changxu Yang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Yuexin Qi
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Shujun Han
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Shujing Chen
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Haifeng Yu
- School of Material Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China; (Z.H.); (H.Y.)
| | - Jingang Liu
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| |
Collapse
|
13
|
Lee ES, Jin J, Chun KW, Lee SS, Oh MC. High-performance optical phased array for LiDARs demonstrated by monolithic integration of polymer and SiN waveguides. OPTICS EXPRESS 2023; 31:28112-28121. [PMID: 37710873 DOI: 10.1364/oe.499868] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 08/03/2023] [Indexed: 09/16/2023]
Abstract
Optical phased array (OPA) beam scanners for light detection and ranging (LiDAR) are proposed by integrating polymer waveguides with superior thermo-optic effect and silicon nitride (SiN) waveguides exhibiting strong modal confinement along with high optical power capacity. A low connection loss of only 0.15 dB between the polymer and SiN waveguides was achieved in this work, enabling a low-loss OPA device. The polymer-SiN monolithic OPA demonstrates not only high optical throughput but also efficient beamforming and stable beam scanning. This novel integrative approach highlights the potential of leveraging heterogeneous photonic materials to develop advanced photonic integrated circuits with superior performance.
Collapse
|
14
|
Ren X, He Z, Wang Z, Pan Z, Qi Y, Han S, Yu H, Liu J. Design, Synthesis and Properties of Semi-Alicyclic Colorless and Transparent Polyimide Films with High Glass Transition Temperatures and Low Retardation for Potential Applications in Flexible Electronics. Polymers (Basel) 2023; 15:3408. [PMID: 37631465 PMCID: PMC10459071 DOI: 10.3390/polym15163408] [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: 06/27/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/27/2023] Open
Abstract
Polyimide (PI) optical films with high glass transition temperatures (high-Tg), high optical transparency, and low optical retardations (low-Rth) are highly desired in advanced optoelectronic applications. However, the standard PI films usually suffer from deep colors, high optical anisotropies and limited Tg values. In the current work, a series of semi-alicyclic colorless and transparent PI (CPI) films were developed from hydrogenated pyromellitic dianhydride stereoisomers, 1S,2R,4S,5R-hydrogenated pyromellitic dianhydride and 1R,2S,4S,5R-hydrogenated pyromellitic dianhydride, and fluorene-containing diamines, including 9,9-bis(4-aminophenyl)fluorene and 9,9-bis(3-fluoro-4-aminophenyl)fluorene, respectively. The derived CPI films showed Tg values higher than 420 °C according to differential scanning calorimetry measurements. In addition, the fluorene-based CPI film showed optical transmittances higher than 80% at the wavelength of 400 nm, with yellow indices in the range of 0.60~1.01 and haze values below 3.0%. The CPI films showed average refractive indices from 1.5407 to 1.6309, extremely low birefringence at the level of minus fourth power of ten, and further exhibited quite low optical retardations below 10 nm.
Collapse
Affiliation(s)
- Xi Ren
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Zhibin He
- School of Material Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China; (Z.H.); (H.Y.)
| | - Zhenzhong Wang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Zhen Pan
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Yuexin Qi
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Shujun Han
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Haifeng Yu
- School of Material Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China; (Z.H.); (H.Y.)
| | - Jingang Liu
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| |
Collapse
|
15
|
Kim AY, Lee SJ, Choi MY, Na C, Kwac LK, Kim HG, Chang JH. Colorless and transparent poly(amide imide) nanocomposites containing organically modified hectorite. RSC Adv 2023; 13:24423-24431. [PMID: 37583674 PMCID: PMC10424564 DOI: 10.1039/d3ra04587k] [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: 07/10/2023] [Accepted: 08/02/2023] [Indexed: 08/17/2023] Open
Abstract
Polyamic acid (PAA) was synthesized using the diamine monomer N,N'-[2,2'-bis(trifluoromethyl)-4,4'-biphenylene]bis(4-aminobenzamide) and dianhydride monomer 4,4'-oxydiphthalic anhydride. Colorless and transparent poly(amide imide) (CPAI) hybrid films were prepared via multi-step thermal imidization of PAA in which various contents of nano-filler were dispersed. The CPAI hybrid films were prepared by dispersing organoclay STN, which was obtained by organically modifying hectorite, in CPAI by solution intercalation with various contents ranging from 1 to 7 wt%. The thermomechanical properties, morphologies, and optical transparencies of the obtained CPAI hybrid films were investigated based on the dispersed STN content, and the results were compared. Some of the clay in the CPAI hybrid film were agglomerated, which was observed using a transmission electron microscope; however, most clays were well-dispersed, with a nano-size of less than 10 nm. The best thermomechanical properties of the CPAI hybrid film were exhibited with an STN content of 3 wt%, but these properties decreased above the critical content. The coefficients of thermal expansion of all the hybrid films were below 20 ppm per °C regardless of the amount of STN, and the yellow index was 1-2 even when the STN content increased to 7 wt%.
Collapse
Affiliation(s)
- A Young Kim
- Graduate School of Carbon Convergence Engineering, Jeonju University Jeonju 55069 Korea
| | - Seon Ju Lee
- Graduate School of Carbon Convergence Engineering, Jeonju University Jeonju 55069 Korea
| | - Moon Young Choi
- Graduate School of Carbon Convergence Engineering, Jeonju University Jeonju 55069 Korea
| | - Changyub 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
| | - Jin-Hae Chang
- Institute of Carbon Technology, Jeonju University Jeonju 55069 Korea
| |
Collapse
|
16
|
Sun J, Zhuo S, Zhang R. Highly Transparent, Temperature-Resistant, and Flexible Polyimide Aerogels for Solar Energy Collection. ACS APPLIED MATERIALS & INTERFACES 2023; 15:37957-37965. [PMID: 37525431 DOI: 10.1021/acsami.3c07720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Advanced aerogel materials with low thermal conductivity and high transparency have shown great application prospects in the solar thermal energy conversion field. However, most aerogels do not meet these requirements due to their low optical transparency and poor mechanical properties. To tackle this problem, we have created versatile polyimide (PI) aerogel materials by adjusting the monomers to alter their molecular structure. These materials exhibit exceptional thermal insulation properties and high transparency, making them ideal for use in the construction of efficient solar collector devices. Incorporating 1,3,5-benzenetricarbonyl trichloride into PI aerogel results in high strength (>3 MPa) and excellent transmittance (>90%) over a broad range of wavelengths (500-2650 nm). The as-prepared PI aerogel solar collector (PIASC) also exhibits a low thermal conductivity (0.032 W/mK), a low density (0.1 g/cm3), and high porosity (90%). By changing the shape of the collector from a flat plate to a cylindrical ring, the heat collection efficiency and capacity are significantly improved, resulting in efficient heat collection. The circular ring collector has a maximum heat collection temperature of 236.8 °C. The PIASC, which is both flexible and highly transparent, is an ideal candidate for advanced optical elements and solar collectors.
Collapse
Affiliation(s)
- Jiancheng Sun
- Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, China
| | - Shijin Zhuo
- China Academy of Launch Technology, Beijing 100076, China
| | - Rubing Zhang
- Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, China
- Tangshan Research Institute of Beijing Jiaotong University, Tangshan 063000, China
| |
Collapse
|
17
|
Nagella SR, Ha CS. Structural Designs of Transparent Polyimide Films with Low Dielectric Properties and Low Water Absorption: A Review. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2090. [PMID: 37513100 PMCID: PMC10386762 DOI: 10.3390/nano13142090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/08/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023]
Abstract
The rapid development of communication networks (5G and 6G) that rely on high-speed devices requiring fast and high-quality intra- and inter-terminal signal transmission media has led to a steady increase in the need for high-performance, low-dielectric-constant (Dk) (<2.5) materials. Consequently, low-dielectric polymeric materials, particularly polyimides (PIs), are very attractive materials that are capable of meeting the requirements of high-performance terminal devices that transmit broadband high-frequency signals. However, such a PI needs to be properly designed with appropriate properties, including a low Dk, low dielectric loss (Df), and low water absorptivity. PI materials are broadly used in various fields owing to their superior property/processibility combinations. This review summarizes the structural designs of PIs with low Dk and Df values, low water-absorbing capacity, and high optical transparency intended for communication applications. Furthermore, we characterize structure-property relationships for various PI types and finally propose structural modifications required to obtain useful values of the abovementioned parameters.
Collapse
Affiliation(s)
- Sivagangi Reddy Nagella
- Department of Polymer Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| |
Collapse
|
18
|
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.
Collapse
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
| |
Collapse
|
19
|
Butnaru I, Damaceanu MD. The Synergistic Effect of Triazine and Phosphaphenanthrene Units on the Physico-Chemical Behavior of Polyimides. Molecules 2023; 28:molecules28104072. [PMID: 37241813 DOI: 10.3390/molecules28104072] [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: 04/11/2023] [Revised: 05/05/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
With the aim to develop polymers with appealing, multifunctional characteristics, a series of polyimides were designed by anchoring 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) units on the main polymer chains containing 1,3,5-triazine and several flexible moieties, such as ether, hexafluoroisopropylidene, or isopropylidene. A detailed study was conducted to establish structure-property correlations, with a focus on the synergistic effectiveness of triazine and DOPO moieties on the overall features of polyimides. The results evidenced good solubility of the polymers in organic solvents, their amorphous nature with short-range regular-packed polymer chains, and high thermal stability with no glass transition temperature below 300 °C. Spectrophotometric measurements revealed the existence of a strong charge transfer complex in these polymers that led to a "black" appearance, which generated broad absorption bands spanning on the overall visible range. Nevertheless, these polymers displayed green light emission associated with 1,3,5-triazine emitter. The electrochemical characteristics of the polyimides in solid state demonstrated their strong n-type doping character induced by three different structural elements with electron-acceptance capability. The useful properties of these polyimides, including optical, thermal, electrochemical, aesthetics, and opaqueness, endow them with several possible applications in the microelectronic field, such as protecting layers for the inner circuits against UV light deterioration.
Collapse
Affiliation(s)
- Irina Butnaru
- Electroactive Polymers and Plasmochemistry Laboratory, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - Mariana-Dana Damaceanu
- Electroactive Polymers and Plasmochemistry Laboratory, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| |
Collapse
|
20
|
Bao F, Lei H, Zou B, Peng W, Qiu L, Ye F, Song Y, Qi F, Qiu X, Huang M. Colorless polyimides derived from rigid trifluoromethyl-substituted triphenylenediamines. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
|
21
|
Zhou D, Peng Q, Kong L, Liu S, Yuan Y, Ma Y, Mo Y, Qin D, Zhao J. Synthesis of Highly Thermostable and Transparent Colorless Polyimides Based on a Semi‐aromatic Tetracarboxylic Anhydride. ChemistrySelect 2023. [DOI: 10.1002/slct.202204830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Affiliation(s)
- Di Zhou
- School of Materials Science and Engineering South China University of Technology Guangzhou Guangdong 510640 China
| | - Qing Peng
- School of Materials Science and Engineering South China University of Technology Guangzhou Guangdong 510640 China
| | - Ling‐lu Kong
- School of Materials Science and Engineering South China University of Technology Guangzhou Guangdong 510640 China
| | - Shu‐mei Liu
- School of Materials Science and Engineering South China University of Technology Guangzhou Guangdong 510640 China
| | - Yan‐chao Yuan
- School of Materials Science and Engineering South China University of Technology Guangzhou Guangdong 510640 China
| | - Yu‐guang Ma
- State Key Laboratory of Luminescent Materials & Devices South China University of Technology Guangzhou Guangdong 510640, Peoples R China
| | - Yue‐qi Mo
- School of Materials Science and Engineering South China University of Technology Guangzhou Guangdong 510640 China
- State Key Laboratory of Luminescent Materials & Devices South China University of Technology Guangzhou Guangdong 510640, Peoples R China
| | - Dong‐huan Qin
- State Key Laboratory of Luminescent Materials & Devices South China University of Technology Guangzhou Guangdong 510640, Peoples R China
| | - Jian‐qing Zhao
- School of Materials Science and Engineering South China University of Technology Guangzhou Guangdong 510640 China
| |
Collapse
|
22
|
Xia X, He X, Zhang S, Zheng F, Lu Q. Short-Side-Chain Regulation of Colorless and Transparent Polyamide-Imides for Flexible Transparent Displays. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.112030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
|
23
|
Highly tough, colorless, transparent polyamide-imide films from one reaction vessel without purification. Macromol Res 2023. [DOI: 10.1007/s13233-023-00130-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
|
24
|
Ma J, Liu X, Wang R, Lu C, Wen X, Tu G. Research Progress and Application of Polyimide-Based Nanocomposites. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13040656. [PMID: 36839026 PMCID: PMC9961415 DOI: 10.3390/nano13040656] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 06/01/2023]
Abstract
Polyimide (PI) is one of the most dominant engineering plastics with excellent thermal, mechanical, chemical stability and dielectric performance. Further improving the versatility of PIs is of great significance, broadening their application prospects. Thus, integrating functional nanofillers can finely tune the individual characteristic to a certain extent as required by the function. Integrating the two complementary benefits, PI-based composites strongly expand applications, such as aerospace, microelectronic devices, separation membranes, catalysis, and sensors. Here, from the perspective of system science, the recent studies of PI-based composites for molecular design, manufacturing process, combination methods, and the relevant applications are reviewed, more relevantly on the mechanism underlying the phenomena. Additionally, a systematic summary of the current challenges and further directions for PI nanocomposites is presented. Hence, the review will pave the way for future studies.
Collapse
|
25
|
Feng J, Wang Y, Qin X, Lv Y, Huang Y, Yang Q, Li G, Kong M. Revealing Molecular Mechanisms of Colorless Transparent Polyimide Films under Photo-Oxidation. Polym Degrad Stab 2023. [DOI: 10.1016/j.polymdegradstab.2023.110294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
|
26
|
The Relationship between Structure and Performance of Different Polyimides Based on Molecular Simulations. Polymers (Basel) 2023; 15:polym15030646. [PMID: 36771947 PMCID: PMC9921807 DOI: 10.3390/polym15030646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/21/2023] [Accepted: 01/23/2023] [Indexed: 01/28/2023] Open
Abstract
A polyimide (PI) molecular model was successfully constructed to compare the performance of PIs with different structures. In detail, the structure of the cross-linked PI resin, the prepolymer melt viscosity, and the glass-transition temperature (Tg) were investigated using molecular simulations. The results indicate that benzene ring and polyene-type cross-linked structures dominate the properties of the PIs. Moreover, the prepolymer melt viscosity simulations show that the 6FDA-APB and the ODPA-APB systems have a low viscosity. The results for the Tg and the distribution dihedral angle reveal that the key factor affecting bond flexibility may be the formation of a new dihedral angle after cross-linking, which affects the Tg. The above results provide an important reference for the design of PIs and have important value from the perspective of improving the efficiency of new product development.
Collapse
|
27
|
Organosoluble and colorless fluorinated poly(ether imide)s containing a bulky fluorene bis(ether anhydride) and various trifluoromethyl-substituted aromatic bis(ether amine)s: synthesis and characterization. IRANIAN POLYMER JOURNAL 2023. [DOI: 10.1007/s13726-023-01140-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
28
|
Chakraborty S, Park HY, Ahn SI. Copper laser patterning on a flexible substrate using a cost-effective 3D printer. Sci Rep 2022; 12:21149. [PMID: 36477714 PMCID: PMC9729301 DOI: 10.1038/s41598-022-25778-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022] Open
Abstract
We studied the cost effective direct laser patterning of copper (Cu) on thin polyimide substrates (PI thickness: 12.5-50 µm) using a 405 nm laser module attached to an inexpensive 3D printer. The focal length of the laser was intentionally controlled to reduce defects on patterned Cu and surface damage of PI under predetermined process conditions. The appropriate focal length was examined at various focal distances. Focal distances of - 2.4 mm and 3 mm were found for the shorter focal length (SFL) and longer focal length (LFL), respectively, compared to the actual focal length. This resulted in clean Cu line patterns without line defects. Interestingly, the SFL case had a different Cu growth pattern to that of LFL, indicating that the small difference in the laser incident angle could affect Cu precursor sintering. Cu square patterns had a lower resistivity of 70 μΩ·cm for an LFL after three or four laser scans, while the SFL showed a resistivity below 48 μΩ·cm for a one-time laser scan. The residues of the Cu precursor on PI were easily removed with flowing water and normal surfactants. However, the resistivity of the patterns decreased after cleaning. Among the scan gaps, the Cu square pattern formed at a 70 μm scan gap had the lowest sheet resistance and the least change in resistance from around 4 to 4.4 Ω/ϒ after cleaning. This result implies that the adhesion of the patterned Cu could be improved if the coated Cu precursor was well sintered under the proper process conditions. For the application of this method to bioelectronics, including biosensors, LEDs were connected to the Cu patterns on PI attached to the arm skin and worked well, even when the substrate PI was bent during power connecting.
Collapse
Affiliation(s)
- Sajal Chakraborty
- Department of Chemistry Education, Graduate Department of Chemical Materials, Institute for Plastic Information and Energy Materials, Pusan National University, Busandaehakro 63-2, Busan, 46241, Republic of Korea
| | - Ho-Yeol Park
- Department of Chemistry Education, Graduate Department of Chemical Materials, Institute for Plastic Information and Energy Materials, Pusan National University, Busandaehakro 63-2, Busan, 46241, Republic of Korea
| | - Sung Il Ahn
- Department of Chemistry Education, Graduate Department of Chemical Materials, Institute for Plastic Information and Energy Materials, Pusan National University, Busandaehakro 63-2, Busan, 46241, Republic of Korea.
| |
Collapse
|
29
|
Choi MY, Lee SJ, Lim AR, Chang JH. Comparison of the properties of polyimide nanocomposite films containing functionalized-graphene and organoclay as nanofillers. Sci Rep 2022; 12:20892. [PMID: 36463262 PMCID: PMC9719546 DOI: 10.1038/s41598-022-25178-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 11/25/2022] [Indexed: 12/04/2022] Open
Abstract
Poly(amic acid) (PAA) is prepared by the reaction of dianhydride 4,4'-biphthalic anhydride and diamine bis[4-(3-aminophenoxy)phenyl]sulfone in N,N'-dimethylacetamide. Two types of fillers were dispersed in the as-synthesized PAA via a solution intercalation method; polyimide (PI) hybrid films were synthesized under various heat treatment conditions. Octylamine (C8) was introduced into graphene sheets (C8-GS) and bentonite (C8-BTN), which were then used as nanofillers in the PI hybrid films. The synthesized nanofillers were used in varying amounts of 0.25-1.00 wt% with respect to the matrix PI. The thermal and morphological properties and optical transparency of the hybrid films were investigated and compared for both C8-GS and C8-BTN at varying nanofiller content. The C8-BTN nanocomposite showed superior thermal properties, and optical transparency, and the filler was well dispersed in the PI matrix compared to the C8-GS nanocomposite. The thermal stability of the hybrid films improved upon the addition of small amounts of the nanofiller. However, beyond a certain critical filler concentration, the thermal stability declined. These results were verified through the dispersion of fillers via transmission electron microscopy.
Collapse
Affiliation(s)
- Moon Young Choi
- grid.411845.d0000 0000 8598 5806Graduate School of Carbon Convergence Engineering, Jeonju University, Jeonju, 55069 Korea
| | - Seon Ju Lee
- grid.411845.d0000 0000 8598 5806Graduate School of Carbon Convergence Engineering, Jeonju University, Jeonju, 55069 Korea
| | - Ae Ran Lim
- grid.411845.d0000 0000 8598 5806Graduate School of Carbon Convergence Engineering, Jeonju University, Jeonju, 55069 Korea ,grid.411845.d0000 0000 8598 5806Department of Science Education, Jeonju University, Jeonju, 55069 Korea
| | - Jin-Hae Chang
- grid.411845.d0000 0000 8598 5806Institute of Carbon Technology, Jeonju University, Jeonju, 55069 Korea
| |
Collapse
|
30
|
Yin Q, Qin Y, Lv J, Wang X, Luo L, Liu X. Reducing Intermolecular Friction Work: Preparation of Polyimide Films with Ultralow Dielectric Loss from MHz to THz Frequency. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Qian Yin
- State Key Laboratory of Polymer Material and Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu610065, P. R. China
| | - Yitian Qin
- State Key Laboratory of Polymer Material and Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu610065, P. R. China
| | - Junwei Lv
- State Key Laboratory of Polymer Material and Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu610065, P. R. China
| | - Xu Wang
- State Key Laboratory of Polymer Material and Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu610065, P. R. China
| | - Longbo Luo
- State Key Laboratory of Polymer Material and Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu610065, P. R. China
| | - Xiangyang Liu
- State Key Laboratory of Polymer Material and Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu610065, P. R. China
| |
Collapse
|
31
|
Kim H, Li J, Hsieh YSY, Cho M, Ahn SH, Li C. Photo-Programmed Deformations in Rigid Liquid Crystalline Polymers Triggered by Body Temperature. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2203772. [PMID: 36169084 DOI: 10.1002/smll.202203772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/13/2022] [Indexed: 06/16/2023]
Abstract
Deformations triggered by body heat are desirable in the context of shape-morphing applications because, under the majority of circumstances, the human body maintains a higher temperature than that of its surroundings. However, at present, this bioenergy-triggered action is primarily limited to soft polymeric networks. Thus, herein, the programming of body temperature-triggered deformations into rigid azobenzene-containing liquid crystalline polymers (azo-LCPs) with a glass-transition temperature of 100 °C is demonstrated. To achieve this, a mechano-assisted photo-programming strategy is used to create a metastable state with room-temperature stable residual stress, which is induced by the isomerization of azobenzene. The programmed rigid azo-LCP can undergo large-amplitude body temperature-triggered shape changes within minutes and can be regenerated without any performance degradation. By changing the programming photomasks and irradiation conditions employed, various 2D to 3D shape-morphing architectures, including folded clips, inch-worm structures, spiral structures, and snap-through motions are achieved. When programmed with polarized light, the proposed strategy results in domain-selective activation, generating designed characteristics in multi-domain azo-LCPs. The reported strategy is therefore expected to broaden the applications of azo-LCPs in the fields of biomedical and flexible microelectronic devices.
Collapse
Affiliation(s)
- Hyunsu Kim
- Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| | - Jing Li
- Development Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
- Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, AlbaNova University Centre, Stockholm, SE106 91, Sweden
| | - Yves S Y Hsieh
- Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, AlbaNova University Centre, Stockholm, SE106 91, Sweden
- School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei, 11031, Taiwan
| | - Maenghyo Cho
- Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| | - Sung-Hoon Ahn
- Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| | - Chenzhe Li
- School of Aerospace Engineering and Applied Mechanics, Tongji University, 100 Zhangwu Road, Shanghai, 200092, China
- Institute of Advanced Machines and Design, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
| |
Collapse
|
32
|
He L, Lin G, Liu X, Tong L. Polyarylene ether nitrile composites film with self-reinforcing effect by cross-linking and crystallization synergy. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
33
|
Liao R, Guo Y, Yang L, Zhou H, Jin W. Solvent-induced microstructure of polyimide membrane to enhance CO2/CH4 separation. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
34
|
Thio SK, Park SY. A review of optoelectrowetting (OEW): from fundamentals to lab-on-a-smartphone (LOS) applications to environmental sensors. LAB ON A CHIP 2022; 22:3987-4006. [PMID: 35916120 DOI: 10.1039/d2lc00372d] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Electrowetting-on-dielectric (EWOD) has been extensively explored as an active-type technology for small-scale liquid handling due to its several unique advantages, including no requirement of mechanical components, low power consumption, and rapid response time. However, conventional EWOD devices are often accompanied with complex fabrication processes for patterning and wiring of 2D arrayed electrodes. Furthermore, their sandwich device configuration makes integration with other microfluidic components difficult. More recently, optoelectrowetting (OEW), a light-driven mechanism for effective droplet manipulation, has been proposed as an alternative approach to overcome these issues. By utilizing optical addressing on a photoconductive surface, OEW can dynamically control an electrowetting phenomenon without the need for complex control circuitry on a chip, while providing higher functionality and flexibility. Using commercially available spatial light modulators such as LCD displays and smartphones, millions of optical pixels are readily generated to modulate virtual electrodes for large-scale droplet manipulations in parallel on low-cost OEW devices. The benefits of the OEW mechanism have seen it being variously explored in its potential biological and biochemical applications. This review article presents the fundamentals of OEW, discusses its research progress and limitations, highlights various technological advances and innovations, and finally introduces the emergence of the OEW technology as portable smartphone-integrated environmental sensors.
Collapse
Affiliation(s)
- Si Kuan Thio
- Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, 117575, Singapore
| | - Sung-Yong Park
- Department of Mechanical Engineering, San Diego State University, 5500 Campanile Drive, San Diego, CA, 92182, USA.
| |
Collapse
|
35
|
Progress on Polymers Containing Imide Rings for Advanced Technologies: A Contribution from ICMPP of the Romanian Academy. CHEMISTRY 2022. [DOI: 10.3390/chemistry4040088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Evolving technology has posed a constantly increasing need for materials that can work well under harsh conditions such as elevated temperatures. Aromatic polyimides have a great potential for this purpose, having excellent thermal, mechanical, dielectric, and optical properties, along with good chemical resistance and high dimensional stability. In spite of their general difficulty in processing and high cost, polyimides are intensively studied for applications in many areas due to their high-end value. This article reviews the progress made on polyimide materials in the “Petru Poni” Institute of Macromolecular Chemistry (ICMPP) of the Romanian Academy during the last decade, with focus on their performance as films, matrices for nanocomposites, coatings for microelectronics and opto-electronic devices, or dielectrics for thin film capacitors.
Collapse
|
36
|
Sato K, Tominaga Y, Imai Y. Optically transparent and thermally conductive composite films of α-alumina and highly refractive polyimide. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04528-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
37
|
Lian R, Lei X, Xiong G, Xiao Y, Zhang Q. Hyperbranched polysiloxane (
HBPSi
)‐based colorless copolyimide films with atomic oxygen (
AO
) erosion resistance. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20220471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ruhe Lian
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
| | - Xingfeng Lei
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
| | - Guo Xiong
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
| | - Yuyang Xiao
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
| | - Qiuyu Zhang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education Northwestern Polytechnical University Xi'an Shaanxi People's Republic of China
| |
Collapse
|
38
|
Zhi XX, Wang HS, Jia J, Gao YS, Wang XL, Zhang Y, Liu JG. Preparation and properties of laterally tert-butyl-substituted cyclohexyl-containing polyimide alignment layers with high pretilt angles for potential applications in twisted-nematic TFT-LCDs. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03262-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
39
|
Zhu G, Lao H, Feng F, Wang M, Fang X, Chen G. Synthesis and characterization of poly(amide-imide)s with high Tg and low CTE derived from isomeric amide-containing diamines. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
40
|
Liu X, Zhang X, Jiang J, Jia H, Jian X, Wang J. Synthesis and Characterization of a Self-Polycondensation Diazaphthalanone Monomer and Its Polymers from Polycondensation Reactions. Polymers (Basel) 2022; 14:polym14183904. [PMID: 36146049 PMCID: PMC9502096 DOI: 10.3390/polym14183904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/03/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Polyether ketone (PEK) plastics are linear thermoplastic polymers connected by at least one ether bond and at least one ketone bond on the aryl group. The reason for their excellent heat resistance, rigidity, and mechanical strength is that their main molecular chain contains plenty of aromatic rings and polar carbonyl groups, and their molecular chain presents a large rigidity and strong intermolecular force. In addition, the main chain contains a considerable number of ether bonds, resulting in a certain toughness. However, polyether ketone materials have the disadvantage of poor solubility because of their excellent rigidity. To improve the solubility of polyether ketone, the preparation method of a novel nitrogenous heterocyclic polyaromatic ether monomer, 2-(4-chlorophenyl)-2,3-dihydrophthalazine-1,4-dione (CDD), was proposed, and its activity of polymerization was studied. The average molecular weight of the poly(aryl ether ketone) containing a nitrogenous heterocyclic polyaromatic ether group obtained by self-polycondensation of CDD was 4.181 × 103 kg/mol, and the yield was 90.5%. In order to further explore the activity of monomers, novel copolymerized poly(aryl ether ketone) (PBCD) containing a nitrogenous heterocyclic polyaromatic ether structure was prepared by ternary copolymerization with 4,4-difluorobenzophenone (DFBP) and bisphenol fluorene (BHPF) with high activity. The average molecular weight of PBCD was 72.793 × 103 kg/mol, the molecular weight distribution was 2.344, and the yield was 88.1%. Fourier transform infrared spectroscopy (FT-IR) and 1H NMR were used to confirm the structure of the obtained polymer. Through thermogravimetric analysis (TGA), the determined weight loss temperature of 5% under nitrogen was higher than 500 °C, indicating excellent thermal stability. Compared with the solubility of the binary copolymer containing fluorenyl poly(aryl ether ketone) (PBD), the polymer showed reasonable solubility in selective solvents such as chloroform and N,N-dimethylacetamide.
Collapse
Affiliation(s)
- Xin Liu
- College of Materials Science and Engineering, Qiqihar University, Wenhua Street 42, Qiqihar 161006, China
| | - Xiaozhou Zhang
- College of Materials Science and Engineering, Qiqihar University, Wenhua Street 42, Qiqihar 161006, China
- Heilongjiang Province Key Laboratory of Polymeric Composition Material, Qiqihar 161006, China
- Correspondence:
| | - Jiawei Jiang
- College of Materials Science and Engineering, Qiqihar University, Wenhua Street 42, Qiqihar 161006, China
| | - Hongge Jia
- College of Materials Science and Engineering, Qiqihar University, Wenhua Street 42, Qiqihar 161006, China
- Heilongjiang Province Key Laboratory of Polymeric Composition Material, Qiqihar 161006, China
| | - Xigao Jian
- Department of Polymer Science & Engineering, Dalian University of Technology, Dalian 116024, China
| | - Jinyan Wang
- Department of Polymer Science & Engineering, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
41
|
Ren X, Zhang Y, Liu Y, Yang C, Dai S, Wang X, Liu J. Preparation and Properties of Intrinsically Black Polyimide Films with CIE Lab Color Parameters Close to Zero and High Thermal Stability for Potential Applications in Flexible Printed Circuit Boards. Polymers (Basel) 2022; 14:polym14183881. [PMID: 36146026 PMCID: PMC9502500 DOI: 10.3390/polym14183881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/10/2022] [Accepted: 09/14/2022] [Indexed: 11/20/2022] Open
Abstract
Black polymer films with high thermal stability are highly desired in flexible electrical and electronic fields. Conventional black polymer films based on high-temperature resistant polymers and black inorganic dyes are usually suffered from the poor electrical and tensile properties. In the current work, a series of intrinsically black polyimide (BPI) films with International Commission on Illumination (CIE) Lab optical parameters close to zero and high thermal stability have been designed and prepared. For this purpose, an electron-rich aromatic diamine, 4,4′-iminodianiline (NDA), was copolymerized with 1,4-phenylenediamine (PDA) and 3,3′,4,4′-biphenyltetracarboxylic dianhydride (sBPDA) to afford a series of poly(amic acid) (PAA) solutions, which were then thermally dehydrated to provide the final BPI films at elevated temperatures up to 400 °C in air. The molar fraction of NDA in the total diamine monomers was 0 for BPI-0 (sBPDA-PDA), 10% for BPI-1, 20% for BPI-2, 30% for BPI-3, 40% for BPI-4, 50% for BPI-5, and 100% for BPI-6. For comparison, two referenced polyimide (PI) films, including PI-ref1 and PI-ref2, were prepared according to a similar procedure. The former was derived from pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA) and the latter was from PMDA and NDA. The BPI films exhibited an increasing degree of blackness with the increasing contents of NDA units in the polymer films. For example, the BPI-6 (sBPDA-NDA) film exhibited the optical transmittance of 1.4% at a wavelength of 650 nm (T650), which was obviously lower than those of PI-ref1 (T650 = 74.6%) and PI-ref2 (T650 = 3.6%). In addition, the BPI-6 film showed the CIE Lab parameters of 0.39 for L*, 2.65 for a*, 0.66 for b*, and haze of 1.83, which was very close to the criterion of “pure blackness” for polymer films (L* = a* = b* = 0). At last, incorporation of the NDA units in the rigid-rod BPI-0 (BPDA-PDA) film slightly deteriorated the high-temperature dimensional stability of the derived BPI films. BPI-6 film showed a linear coefficient of thermal expansion (CTE) value of 34.8 × 10−6/K in the temperature range of 50 to 250 °C, which was higher than those of the BPI-0 (CTE = 12.3 × 10−6/K), PI-ref1 (CTE = 29.5 × 10−6/K), and PI-ref2 (CTE = 18.8 × 10−6/K) films. Nevertheless, the BPI films maintained good thermal stability with the 5% weight loss temperatures (T5%) higher than 590 °C, and the glass transition temperatures (Tg) higher than 340 °C.
Collapse
Affiliation(s)
| | - Yan Zhang
- Correspondence: (Y.Z.); (J.L.); Tel.: +86-10-8232-2972 (J.L.)
| | | | | | | | | | - Jingang Liu
- Correspondence: (Y.Z.); (J.L.); Tel.: +86-10-8232-2972 (J.L.)
| |
Collapse
|
42
|
Ren X, Wang H, Du X, Qi H, Pan Z, Wang X, Dai S, Yang C, Liu J. Synthesis and Properties of Optically Transparent Fluoro-Containing Polyimide Films with Reduced Linear Coefficients of Thermal Expansion from Organo-Soluble Resins Derived from Aromatic Diamine with Benzanilide Units. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6346. [PMID: 36143653 PMCID: PMC9501536 DOI: 10.3390/ma15186346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 06/16/2023]
Abstract
Wholly aromatic polyimide (PI) films with good solution processability, light colors, good optical transparency, high storage modulus, and improved heat resistance were prepared and characterized. For this purpose, a multi-component copolymerization methodology was performed from a fluoro-containing dianhydride, 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), a rigid dianhydride, 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), and a fluoro-containing diamine, 2,2'-bis(trifluoromethyl)-4,4'-bis [4-(4-amino-3-methyl)benzamide]biphenyl (MABTFMB). One homopolymer, FPI-1 (6FDA-MABTFMB), and five copolymers, FPI-2~FPI-6, containing the BPDA units from 10 mol% to 50 mol% in the dianhydride moieties, were prepared, respectively. The derived PI resins showed good solubility in the polar aprotic solvents, such as N-methyl-2-pyrrolidone (NMP) and N,N-dimethylacetamide (DMAc). The flexible PI films obtained by the solution casting procedure showed good optical properties with the transmittances higher than 74.0% at the wavelength of 450 nm. The PI films exhibited excellent thermal properties, including 5% weight loss temperatures (T5%) over 510 °C, together with glass transition temperatures (Tg) over 350.0 °C according to the peak temperatures of the loss modulus in dynamical mechanical analysis (DMA) measurements. The FPI-6 film also showed the lowest linear coefficient of thermal expansion (CTE) value of 23.4 × 10-6/K from 50 to 250 °C according to the thermomechanical analysis (TMA) measurements, which was obviously lower than that of FPI-1 (CTE = 30.6 × 10-6/K).
Collapse
Affiliation(s)
- Xi Ren
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Hanli Wang
- Shandong Huaxia Shenzhou New Material Co., Ltd., Zibo 256401, China
| | - Xuanzhe Du
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Haoran Qi
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Zhen Pan
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Xiaolei Wang
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Shengwei Dai
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Changxu Yang
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Jingang Liu
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| |
Collapse
|
43
|
Shu C, Wu X, Zhong M, Wang S, Yan D, Huang W. Synthesis and properties of polyimides from a diamine containing side diphenylphosphine oxide and trifluoromethyl groups. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-02998-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
44
|
Zhang Y, Zhou Y, Wang Z, Yan J. Colorless poly(amide‐imide) copolymers for flexible display applications. J Appl Polym Sci 2022. [DOI: 10.1002/app.53082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yuanhao Zhang
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Science Ningbo China
- Ningbo Solartron Technology Co., Ltd Ningbo China
| | - Yubo Zhou
- Ningbo Solartron Technology Co., Ltd Ningbo China
| | - Zhen Wang
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Science Ningbo China
| | - Jingling Yan
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Science Ningbo China
| |
Collapse
|
45
|
Pan Z, Wang HL, Qi HR, Gao YS, Wang XL, Zhi XX, Zhang Y, Ren X, Liu JG. Molecular Design, Preparation, and Characterization of Fluoro-Containing Polyimide Ultrafine Fibrous Membranes with High Whiteness, High Thermal Stability, and Good Hydrophobicity. Molecules 2022; 27:molecules27175447. [PMID: 36080211 PMCID: PMC9457758 DOI: 10.3390/molecules27175447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/21/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022] Open
Abstract
Polymeric ultrafine fibrous membranes (UFMs) with high thermal stability and high whiteness are highly desired in modern optoelectronic applications. A series of fluoro-containing polyimide (FPI) UFMs with high whiteness, good thermal stability, and good hydrophobicity were prepared via a one-step electrospinning procedure from the organo-soluble FPI resins derived from a fluoro-containing dianhydride, 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA), and various diamines containing either pendant trifluoromethyl (–CF3) groups or alicyclic units in the side chains. The obtained FPI UFMs, including FPI-1 from 6FDA and 3,5-diaminobenzotrifluoride (TFMDA), FPI-2 from 6FDA and 2′-trifluoromethyl-3,4′-oxydianiline (3FODA), FPI-3 from 6FDA and 1,4-bis[(4-amino-2-trifluoromethyl)phenoxy]benzene (6FAPB), FPI-4 from 4,4′-bis[(4-amino-2-trifluoromethyl)phenoxy]biphenyl (6FBAB), and FPI-5 from 6FDA and 4’-tert-butyl-cyclohexyl-3,5-diaminobenzoate (DABC) showed whiteness indices (WI) higher than 87.00 and optical reflectance values higher than 80% at the wavelength of 457 nm (R457), respectively. The FPI-5 UFM, especially, showed the highest WI of 92.88. Meanwhile, the prepared PI UFMs exhibited good hydrophobic features with water contact angles (WCA) higher than 105°. At last, the PI UFMs exhibited good thermal stability with glass transition temperatures (Tg) higher than 255 °C, and the 5% weight-loss temperatures (T5%) higher than 510 °C in nitrogen.
Collapse
Affiliation(s)
- Zhen Pan
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Han-li Wang
- Shandong Huaxia Shenzhou New Material Co., Ltd., Zibo 256401, China
| | - Hao-ran Qi
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Yan-shuang Gao
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Xiao-lei Wang
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Xin-xin Zhi
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Yan Zhang
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Xi Ren
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Jin-gang Liu
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
- Correspondence: ; Tel.: +86-10-8232-2972
| |
Collapse
|
46
|
Xu Y, Zhang M, Pang Y, Zheng T, Zhang L, Wang Z, Yan J. Colorless Polyimides from 2,2',3,3'-Biphenyltetracarboxylic Dianhydride and Fluorinated Diamines. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
47
|
Sawada R, Ando S. Colorless, Low Dielectric, and Optically Active Semialicyclic Polyimides Incorporating a Biobased Isosorbide Moiety in the Main Chain. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ririka Sawada
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
48
|
Han F, Wang T, Liu G, Liu H, Xie X, Wei Z, Li J, Jiang C, He Y, Xu F. Materials with Tunable Optical Properties for Wearable Epidermal Sensing in Health Monitoring. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2109055. [PMID: 35258117 DOI: 10.1002/adma.202109055] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/26/2022] [Indexed: 06/14/2023]
Abstract
Advances in wearable epidermal sensors have revolutionized the way that physiological signals are captured and measured for health monitoring. One major challenge is to convert physiological signals to easily readable signals in a convenient way. One possibility for wearable epidermal sensors is based on visible readouts. There are a range of materials whose optical properties can be tuned by parameters such as temperature, pH, light, and electric fields. Herein, this review covers and highlights a set of materials with tunable optical properties and their integration into wearable epidermal sensors for health monitoring. Specifically, the recent progress, fabrication, and applications of these materials for wearable epidermal sensors are summarized and discussed. Finally, the challenges and perspectives for the next generation wearable devices are proposed.
Collapse
Affiliation(s)
- Fei Han
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Tiansong Wang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Guozhen Liu
- School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, 518172, P. R. China
| | - Hao Liu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Xueyong Xie
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Zhao Wei
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Jing Li
- Department of Burns and Plastic Surgery, Second Affiliated Hospital of Air Force Military Medical University, Xi'an, 710038, P. R. China
| | - Cheng Jiang
- School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, 518172, P. R. China
- Department of Chemistry, University of Oxford, Oxford, OX1 3QZ, UK
| | - Yuan He
- The Second Affiliated Hospital, Xi'an Medical University, Xi'an, 710038, P. R. China
| | - Feng Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| |
Collapse
|
49
|
Li D, Wang C, Yan X, Ma S, Lu R, Qian G, Zhou H. Heat-resistant colorless polyimides from benzimidazole diamines: Synthesis and properties. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
50
|
Bertelli M, Díaz Fattorini A, De Simone S, Calvi S, Plebani R, Mussi V, Arciprete F, Calarco R, Longo M. Structural and Electrical Properties of Annealed Ge 2Sb 2Te 5 Films Grown on Flexible Polyimide. NANOMATERIALS 2022; 12:nano12122001. [PMID: 35745340 PMCID: PMC9228038 DOI: 10.3390/nano12122001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 01/02/2023]
Abstract
The morphological, structural, and electrical properties of as-grown and annealed Ge2Sb2Te5 (GST) layers, deposited by RF-sputtering on flexible polyimide, were studied by means of optical microscopy, atomic force microscopy, X-ray diffraction, Raman spectroscopy, and electrical characterization. The X-ray diffraction annealing experiments showed the structural transformation of GST layers from the as-grown amorphous state into their crystalline cubic and trigonal phases. The onset of crystallization of the GST films was inferred at about 140 °C. The vibrational properties of the crystalline GST layers were investigated via Raman spectroscopy with mode assignment in agreement with previous works on GST films grown on rigid substrates. The electrical characterization revealed a good homogeneity of the amorphous and crystalline trigonal GST with an electrical resistance contrast of 8 × 106.
Collapse
Affiliation(s)
- Marco Bertelli
- Institute for Microelectronics and Microsystems (IMM), Consiglio Nazionale delle Ricerche (CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (M.B.); (A.D.F.); (S.D.S.); (V.M.); (M.L.)
| | - Adriano Díaz Fattorini
- Institute for Microelectronics and Microsystems (IMM), Consiglio Nazionale delle Ricerche (CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (M.B.); (A.D.F.); (S.D.S.); (V.M.); (M.L.)
| | - Sara De Simone
- Institute for Microelectronics and Microsystems (IMM), Consiglio Nazionale delle Ricerche (CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (M.B.); (A.D.F.); (S.D.S.); (V.M.); (M.L.)
| | - Sabrina Calvi
- Institute for Microelectronics and Microsystems (IMM), Consiglio Nazionale delle Ricerche (CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (M.B.); (A.D.F.); (S.D.S.); (V.M.); (M.L.)
- Department of Physics, University of “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (S.C.); (R.P.); (F.A.)
| | - Riccardo Plebani
- Department of Physics, University of “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (S.C.); (R.P.); (F.A.)
| | - Valentina Mussi
- Institute for Microelectronics and Microsystems (IMM), Consiglio Nazionale delle Ricerche (CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (M.B.); (A.D.F.); (S.D.S.); (V.M.); (M.L.)
| | - Fabrizio Arciprete
- Department of Physics, University of “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy; (S.C.); (R.P.); (F.A.)
| | - Raffaella Calarco
- Institute for Microelectronics and Microsystems (IMM), Consiglio Nazionale delle Ricerche (CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (M.B.); (A.D.F.); (S.D.S.); (V.M.); (M.L.)
- Correspondence:
| | - Massimo Longo
- Institute for Microelectronics and Microsystems (IMM), Consiglio Nazionale delle Ricerche (CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (M.B.); (A.D.F.); (S.D.S.); (V.M.); (M.L.)
| |
Collapse
|