INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Jiyan Wei,Xiaoquan Li,Fuping Bian,Jun Zeng,Jiwen Hu,Tongqiang Zong,Na Li,Shudong Lin
High purity silver nanowires (AgNWs) have received a lot of attention from researchers in the field of conductive materials. Conventional polyol synthesis method of AgNWs inevitably leads to the formation of byproduct such as silver nanoparticles. These silver nanoparticles weaken the performance of AgNWs-based flexible displays and must be cleaned up by the purification steps. In this article, we reported a facile and simple method for the synthesis of high purity AgNWs with aspect ratio over 1500 by a one-pot polyol method using silver chloride (AgCl) suspension as nucleating agents via a heterogeneous nucleation mechanism. The process of AgNWs formation was revealed by characterizing UV–vis absorption spectra at different reaction steps, then the process of AgNWs growth from nucleating agents was hypothesized. The reaction temperature and the amounts of AgCl suspension were discussed to investigate their effect on morphology of AgNWs. The high purity silver nanowires prepared via this way are ideal materials for flexible transparent conductive films and will be widely used in flexible displays, solar cells and sensors.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Ran Zong,Xinli Hu,Shuangyi Liu,Aosheng Zhong,Baoqing Shentu
Aiming to satisfy the requirements of pressure-sensitive adhesives (PSAs) for flexible displays, 2-[[[6-[3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)ureido]hexyl]carbamoyl] oxy]ethyl acrylate (Upy-HDI-HEA) was synthesized, and a series of dual cross-linking EHA-co-HEA copolymers with multiple hydrogen bonds were prepared. The effects of the Upy-HDI-HEA content on the EHA-co-HEA copolymers’ chemical structure, thermal properties, viscoelasticity, mechanical properties, and adhesion performance were comprehensively investigated via in situ Fourier transform infrared (FT-IR), differential scanning calorimetry (DSC), mechanical testing, and adhesion testing. The multiple hydrogen bonds acting as strong physical cross-linking enhance the deformation resistance of EHA-co-HEA copolymers. Moreover, compared to chemical cross-linking, the multiple hydrogen bonds allow for a certain degree of unhindered movement and energy dissipation, which benefits the flexibility and peel resistance of EHA-co-HEA copolymers. Consequently, relatively low storage moduli and glass transition temperatures were observed in all EHA-co-HEA copolymers. Young’s modulus, recovery rate, and cyclic stability of EHA-co-HEA copolymers increase with the rising Upy-HDI-HEA content. Also, the loop tack, 180° peel strength, and shear strength of EHA-co-HEA copolymers significantly improved, showing a better adhesion performance than commercial PSAs.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER SCIENCE SERIES B
·
2023
·Vol. 65
·期 2
·120-128
·
IF 1.2
Yang Wu,Ding Chengcheng,Yu Juan,Huang Pei
Abstract Transparent polyimide films with excellent comprehensive properties may be indispensable to next-generation optoelectronic and flexible display applications. To date, the most studied transparent polyimide films are mainly prepared with alicyclic dianhydride as monomer, but the related properties of such films are not satisfactory. In this work, two series of highly optically transparent copolyimide films were prepared by the polycondensation of dicyclohexyl-3,4,3',4'-tetracarboxylic dianhydride, 1,2,4,5-cyclohexane-tetracarboxylic dianhydride, 4,4'-(hexafluoroisopropylidene) diphthalic anhydride with 4,4'-oxydianiline via a facile one-step method. Through the optimization of structure and composition, the relationship between structure and properties of copolymerized semi-alicyclic polyimide was studied. The prepared copolyimide films show good thermal stability: glass transition temperatures in the range of 264–315°C and 5% weight loss temperature of 463–527°C, superior optical transparency up to 90%. Specifically, these copolyimide films have tensile strength greater than 90.3 MPa.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2024
·
IF 3.9
Jia Si,Xingtong Zhu,Yun Wei,Xiuyan Ren,Zhenyu Li,Jiajun Xu
Flexible film in display requires multi-functional integration, such as stretchability, flexibility, abrasion resistance, transparency, and shape memory. In this paper, a reasonable design strategy of flexible polyacrylate (PA) film with high transparency, shape memory, excellent abrasion resistance and foldability is presented. The PA films are prepared by free radical polymerization of vinyl-terminated polyurethane (PU) prepolymer as a cross-linking agent and acrylate monomers in ultraviolet (UV) light. The various acrylate monomers in PA films with different functional groups (e.g. epoxy groups, benzene rings) provide soft-rigid chains and hydrogen bonds, which improve overall mechanical and optical properties. The experimental results also effectively demonstrate that after folding performance (500 cycles) or abrasion resistance (1000 cycles), the transparency of PA film remained above 91%. In addition, the PA films with different folded shapes also prove excellent shape memory, which can fix the folded shape at low temperature and then return to the original shape at room temperature. Notably, the PA film is successfully applied to the curved touch screen through drawing, pattern decoding and image magnification in the simulation practical demonstration, fully revealing its great significance as a flexible substrate in the development of future flexible displays.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HIGH PERFORMANCE POLYMERS
·
2024
·
IF 1.8
Chuyi Fang,Ke Xu,Tao Li,Guangtao Qian,Dandan Li,Chunhai Chen
To provide polyimide (PI) with high heat resistance and ultra-low coefficient of thermal expansion (CTE) for use in flexible display substrates, a novel diamine with bisbenzimidazole and bisamide groups, namely N,N'-(1H,1'H-[5,5'-bibenzo[d]imidazole]-2,2'-diyl)bis(4-aminobenzamide) (BZBA), was designed and successfully synthesized. Several poly(benzimidazole-amide-imide) (PBIAI) films were prepared by thermal imidization with 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), 4,4'-oxydiphthalic anhydride (ODPA), 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA), and 4,4'-(hexafluoroisopropylindene)-diphthalic anhydride (6FDA), respectively. Among them, BZBA-BPDA has a high glass transition temperatures (Tg = 345 °C) while achieving an extremely low coefficients of thermal expansion (CTE = 1.9 ppm K−1), meeting the processing requirements of polymer flexible substrates in OLED devices. The effects of different dianhydrides on the performance of PBIAIs were compared, providing a meaningful reference for further adjusting the PI molecular structure to meet specific requirements for industrial polymer films.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·Vol. 63
·期 8
·1891-1897
·
IF 3.6
WenJie Zhu,Muke Zhang,JianJun Zeng,Yufei Tang,Xin Li,Jinchao Li,Liang Chen,Qin Chen,Aibing Lu,Qianqian Liang,Yaping Zhang
The rapid development of flexible organic light-emitting diode displays has intensified the demand for polyimide (PI) films with enhanced thermal and mechanical properties. In this study, a dibenzimidazole diamine monomer is synthesized, and a series of PI films are fabricated with the molar ratio of diamine monomer adjusted to optimize film performance. The optimized PI-1 film exhibits a low coefficient of thermal expansion (5.0 ppm K −1 ), high glass transition temperature (452 °C) and 5% weight loss temperature (550 °C), improved tensile strength (168 MPa) and a modulus of elasticity (5.2 GPa) that meet the requirements for flexible display applications. The findings of this study provide valuable guidance for fabricating advanced PI films based on monomer composition and rational molecular structural design. Graphical
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xiaojing Lv,Juncheng Dong,Mingfa Shao,Jin Li,Jiankun Cui,Yufeng Shi,Yang He,Mi Ouyang,Cheng Zhang
Electrochromic (EC) technology, with its reversible color changes and special light modulation, has a wide range of applications in adaptive military camouflage. However, there are still some problems such as difficulties with multicolor display, flexible patterned displays, and difficult integration with electrochromic and energy storage that limit its development and applications in portable military camouflage devices. In this work, a multicolored conjugated polymer, p3DT-FSQ, was designed and prepared by electrochemical polymerization. The polymer film exhibits a reversible color change, high optical contrast, and a fast switching time. On this basis, the reflective and transmissive zinc-based electrochromic devices (RZECD and TZECD) were optimally assembled based on the p3DT-FSQ film as the EC layer and zinc sheet or zinc frame as the counter electrode. Both RZECD and TZECD show reversible orange-yellow, earthy yellow, and army green colors at various potentials with good energy storage properties and excellent flexibility, meeting the demand for color variation and functionality in modern electronic combat environments. It is even more intriguing that the patterned TZECDs can accurately simulate six combat environments, including Gobi, highland, wilderness, cropland, desert, and forest. This work presents a design strategy for an adaptive EC military camouflage device that also has an energy storage function, making it an excellent choice for portable adaptive military camouflage.
研究领域:
材料科学
·
能源技术
·
军事应用
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2023
·
IF 5.7
Zhewei Chen,Junjie Wu,Zheheng Song,Yatao Zou,Jingyun Hu,Ya Li,Yuhang Song,Yawen Li,Guilin Bai,Xiang Li,Yanan Zhu,Xinping Zhang,Xue-Dong Wang,Tao Song,Baoquan Sun
Perovskite materials are promising candidates for the implementation of electrically pumped lasers considering the enhanced performance of perovskite-based light-emitting diodes. Nonetheless, current methods of fabricating perovskite optical microcavities require complex patterning technologies to build suitable resonant cavities for perovskite laser emission, burdening the device structure design. To address this issue, we applied inkjet printing, a maskless patterning technique, to directly create spontaneous formations of polycrystalline perovskite microcavity arrays to explore their laser-emitting action. The substrate surface tension was tuned to modulate the perovskite crystallization process in combination with optimization of printing ink recipes. As a result, polycrystalline perovskite microcavity arrays were achieved, contributing to the laser emission at 528 nm with a lasing threshold of 1.37 mJ/cm2, while simultaneously achieving high-definition patterning of flexible display. These results clearly illustrate the efficiency of inkjet printing technology in the preparation of polycrystalline perovskite optical microcavities and promote the development of flexible laser arrayed displays, providing a facile process toward the realization of perovskite-cavity laser devices.
研究领域:
材料科学
·
光学
·
光子学
·
纳米技术
·
印刷技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 7
·期 4
·1065-1071
·
IF 5.976
Zhen Qin,Qiutong Wang,Chengzhong Wang,Dongfeng Xu,Guiping Ma,Kai Pan
White-light-emitting materials are an important component for realizing full-color OLED devices. However, it is still a challenge to achieve white-light emission from one single fluorescent dye, as the essential requirement of the emission spectrum is that it should be sufficiently broad to cover the entire visible-light region. Controlling the energy transfer between two or three fluorescent dyes is a feasible approach for achieving white-light emission, and this has attracted widespread attention from many researchers. In this study, a white-light-emitting Janus nanofiber film was fabricated using a side-by-side electrospinning method. RGB fluorescent molecules were used to form a donor–acceptor system, where the red and blue fluorescent molecules were located on the PAN-side of the nanofiber, and the green fluorescent molecules were located on the PVP-side of the nanofiber. The Janus structure enabled an efficient spatial separation of the RGB fluorescent molecules within the nanofiber while rationally regulating the two-step energy transfer effect between the RGB fluorescent molecules, resulting in the emission of uniform white light from every individual microscopic-sized nanofiber. Such nanofiber films have great potential for use in next-generation flexible display applications due to their excellent performance and micro scale.
研究领域:
材料科学
·
光电技术
·
纳米技术
✓ 已验证
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Xuejian Xia,Songyang Zhang,Xiaojie He,Feng Zheng,Qinghua Lu
The burgeoning of flexible displays has spawned an urgent need for next-generation cover window materials, which need to combine high modulus, toughness, and ultra-high transmittance . Here, inspired by Velcro® closure, a colorless transparent supramolecular polyimide composite (CPI–C) has been prepared by self-assembly of a crown ether , 18CE6, with a diamine monomer , followed by in situ polymerization with a dianhydride monomer. In the supramolecular composite, the 18CE6 macrocycles were threaded by the CPI chain and fixed on the amide structural unit by hydrogen bonds . Numerous necklace-like molecular chains were mutually entangled to form a Velcro®-like aggregate. Due to strong interactions between the chains imparted by the interlocking rings, they were prevented from sliding under an external force. Our experimental results demonstrated that the unique supramolecular composite improved both the mechanical strength and toughness of the PI film without sacrificing its optical properties . The obtained CPIs showed good optical transmittance (86% at 450 nm), an extremely high Young's modulus (8.3 GPa), and a high elongation at break (23.8%). The described approach may provide guidance for fabricating high strength and high toughness colorless transparent polymer films for flexible cover windows.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 7
·4234-4239
·
IF 4.036
Dandan Li,Chengyang Wang,Xiaoying Yan,Shengqi Ma,Ran Lu,Chunhai Chen,Guangtao Qian,Hongwei Zhou
To obtain high thermostable materials for flexible display substrates, a series of copoly(benzimidazole imide)s was prepared using 5-amine-2-(4-aminobenzene)-1-phenyl-benzimidazole (N-PhPABZ) and 6(5)-amino-2-(4-aminobenzene)-benzimidazole (PABZ). Incorporating N-phenyl groups effectively healed the brittleness of the poly(benzimidazole imide)s (PBIIs) derived from pyromellitic dianhydride (PMDA), and the resultant homo- and copoly(benzimidazole imide)s displayed an outstandingly high glass transition temperature (Tg > 450 °C) and a low coefficient of thermal expansion (CTE < 10 ppm K−1). Furthermore, the influence of removing intermolecular hydrogen bonds on the properties of these poly(benzimidazole imide)s was systematically analyzed. These data provide a feasible method to prepare superheat-resistant poly(benzimidazole imide)s without H-bonding.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
OPTICS EXPRESS
·
2025
·Vol. 33
·期 9
·18686-18697
·
IF 3.3
Shiqing Zhao,Shiqing Zhao,Shiqing Zhao,Xinhao Shi,Luhui Feng,Jiarui Chen,Xinli Cheng,Xinli Cheng,Cheng Zhang,Cheng Zhang,Yanhua Liu,Yanhua Liu
Electrochromic devices (ECDs) that realize active transmittance or reflectance modulation under reversible electrical stimuli have triggered intense research interest and consequently plenty of practical applications. However, the majority of inorganic electrochromic materials have limited color switching versatility. To solve the drawbacks, we introduce a WO3-based ECD integrated with a thin-film resonance cavity composed of reflection (metallic tungsten, W), dielectric (WO3), and air layers, which endows the device with outstanding color modulability across the full visible spectrum region. By adjusting the thickness of WO3 (113 - 236 nm) film and its refractive index (n) and extinction coefficient (k) through applying electrical bias ranging from -1.5 to 0.5 V, the ECDs exhibit abundant vivid colors, including yellow, green, blue, and magenta, etc. The strategy of thin-film resonance cavity brings improved electrochromic properties in terms of fast response (3.3 s for coloration and 2.9 s for bleaching), high coloration efficiency (75.3 cm2 C−1), long chemical stability (1000 cycles retaining 81% of optical modulation), and remarkable spectrum peak migration (∼181 nm). More importantly, a polyethylene terephthalate (PET) substrate was introduced in the devices to demonstrate the suitability for flexible ECDs, which can accelerate the development of flexible colorful displays in the future.
研究领域:
材料科学
·
光学
·
纳米技术
·
电化学
·
显示技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）