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Dual-function PEG engineering enables room temperature-switchable hydrogel smart windows with ultrahigh solar modulation

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Ceramics International 2025年

作者： Qi Jiang Bin Li Senwei Wu Xiujian Zhao Shouqin Tian State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 China Department of Electronic Engineering The Chinese University of Hong Kong New Territories Hong Kong SAR 999077 China State Key Laboratory of Advanced Glass Materials Wuhan University of Technology Wuhan 430070 China

Thermochromic hydroxypropyl cellulose (HPC) hydrogel-based smart windows have attracted considerable attention owing to their significant potential to reduce the building energy consumption. Lowering their low critical transition temperature (LCST, >40 °C) to room temperature (∼25 °C) is the primary goal for practical application, but this is always accompanied by a compromise in solar modulation efficiency (Δ T sol ). To address this issue, we proposed a ‘two birds with one stone’ approach: introducing polyethylene glycol (PEG) into hydrogels. By adjusting the content and molecular weight of PEG, LCST could be flexibly controlled from 45.5 to 24 °C by tailoring the hydrogen bonding strength between HPC and water. Meanwhile, the introduction of PEG formed a denser double network structure. This induced more pronounced aggregation upon phase transition, thereby completely blocking near-infrared light and resulting in enhanced NIR modulation efficiency (Δ T NIR ) and Δ T sol . The HPC/PEG composite hydrogel smart window with PEG2000 content of 30 wt% showed optimal overall performance with luminous transmittance ( T lum ) of 92.9 %, Δ T NIR of 73.7 %, Δ T sol of 84.2 % and a low LCST of 26.7 °C. The proof-of-concept experiment demonstrated that the smart window reduced the indoor temperature by 12 °C compared to the blank glass, indicating good energy-saving potential.

关键词： HPC hydrogel Low critical transition temperature Optical property PEG Smart window

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Wireless Smart Gloves with Ultra-Stable and All-Recyclable Liquid Metal-Based Sensing Fibers for Hand Gesture Recognition

SSRN

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SSRN 2022年

作者： Gu, Wei Yan, Shengchang Xiong, Jian Li, Yaogang Zhang, Qinghong Li, Kerui Hou, Chengyi Wang, Hongzhi State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai201620 China Engineering Research Center of Advanced Glass Manufacturing Technology Ministry of Education College of Materials Science and Engineering Donghua University Shanghai201620 China

Fibrous electronics are essential components of wearable human-machine interfaces. However, the mass production and application of fibrous electronics will inevitably lead to electronic waste problems. Therefore, recyclability has become a basic required feature of fibrous electronics for future use. Here, we realize an intrinsically all-recyclable, ultra-stretchable and scalable resistive sensing ﬁber based on liquid metal and thermoplastic materials. Given the ultra-stable electrical properties of the sensing fiber (~10,000 cycles remain stable and regular) and the ability to continuously capture real-time static and dynamic somatosensory signals, we design a wireless smart glove-based interactive interfaces with cost-effectiveness, high integration, self-adaptability and crosstalk-free recognition ability of both static and dynamic hand gestures. Combined with machine learning technology, the successful construction of three static and dynamic hand gesture recognition systems (11 hand gestures with a recognition accuracy of ~93.6%) demonstrates the potential of the proposed wireless smart gloves to have widespread practical applications prospects. © 2022, The Authors. All rights reserved.

关键词： Machine learning

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Sandwich-Structural Ionogel Electrolyte with Core-Shell Ionic-Conducting Nanocomposites for Stable Li Metal Battery

SSRN

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SSRN 2022年

作者： He, Caohua Sun, Jianqi Hou, Chengyi Zhang, Qinghong Li, Yaogang Li, Kerui Wang, Hongzhi State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai201620 China Engineering Research Center of Advanced Glass Manufacturing Technology Ministry of Education College of Materials Science and Engineering Donghua University Shanghai201620 China

Ionogel electrolytes (IGEs) containing ionic liquids as the unique liquid component can guarantee high ionic conductivity, wide electrochemical window, and high thermal stability simultaneously for developing stable and safe Li metal batteries, yet suffer from relatively low Li+ transference. In this work, ceramic ionic conductor-metal organic framework (MOF) core-shell nanocomposites are introduced as active matrix to fabricate a reinforcement layer with a high mechanical modulus. The ceramic core provides Li + conduction pathway and the MOF shell possesses open pores and metal sites for ionic selectivity. Beyond this, the reinforcement layer is sandwiched by two buffer layers with a flexible polymer matrix to improve the interface compatibility and wettability with electrodes. Here, the nanocomposites powder can be synthesized through solid sintering followed by facile in-situ solution growth, promising the scalable production and practical application of the IGEs. As a result, the sandwich-structural IGE shows a high ionic conductivity of 3.87 × 10−4 S cm−1 at 25℃, wide electrochemical window (up to 5.2 V vs. Li/Li+ ), and high thermal stability. The full cell (LiCoO2 cathode) maintains 97.9% capacity after 500 cycles at 0.2 C. © 2022, The Authors. All rights reserved.

关键词： Ionic conductivity

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Construction and fabrication of Zn(In 0.1 Ga 0.9 ) 2 O 4 /NH 2 -MIL-125(Ti-Zr) composite materials with S-scheme heterojunction for highly efficient photocatalytic degradation of organic pollutants

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Materials Science in Semiconductor Processing 2025年 198卷

作者： Zhixiong Huang Lingxiu Shu Changchun Chen Yupeng Shi Chenxi Cui Zishen Guan Yifeng Wang Lin Pan College of Materials Science and Engineering Nanjing Tech University No. 30 Puzhu Road (S) Nanjing 211816 PR China State Key Laboratory of Advanced Technology for Float Glass CNBM Research Institute for Advanced Glass Materials Group Co. Ltd. Bengbu Anhui 233000 PR China Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech University No. 5 New Model Road 210009 Nanjing PR China

The effective degradation of organic dyes and tetracycline in wastewater is crucial for environmental protection. Currently, photocatalytic degradation using S-scheme heterojunction catalysts represents an efficient solution. In this study, we employed doping engineering by partially substituting Ga 3+ with In 3+ in ZnGa 2 O 4 and Ti 4+ with Zr 4+ in NH 2 -MIL-125(Ti) to modulate their band edge positions and bandgaps. This approach successfully constructed an S-scheme Zn(In 0.1 Ga 0.9 ) 2 O 4 /NH 2 -MIL-125(Ti-Zr) composite photocatalyst with enhanced built-in electric field. The composite photocatalysts were synthesized via a hydrothermal together with a solvothermal method. Field emission SEM images of the samples showed that the disc-shaped NH 2 -MIL-125(Ti-Zr) was effectively attached to the irregular small particles of Zn(In 0.1 Ga 0.9 ) 2 O 4 . The existence of an S-scheme heterojunction at the interface of Zn(In 0.1 Ga 0.9 ) 2 O 4 and NH 2 -MIL-125 (Ti-Zr) was confirmed through various characterization techniques, including photoelectrochemical tests, XPS analysis, and free radical trapping experiments. As demonstrated by photocatalytic experiments, the NZ-20 % composite has the highest photocatalytic activity and good stability. The degradation efficiencies for Rh. B and tetracycline over the NZ-20 % composite sample under solar light irradiation for 90 min are 96.3 % and 88.5 %, respectively. Additionally, the response surface methodology (RSM) was employed to analyze the key factors affecting the photocatalytic degradation of organic pollutants, namely pH value, temperature, and contaminant level. All in all, this work presents a potential strategy to fabricate superior composite photocatalysts with S-scheme heterojunctions for combating environmental pollution challenges.

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Effect of CaO/MgO mixture on the structure and dielectric properties of alumino-borosilicate glass

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Journal of Non-Crystalline Solids 2025年 666卷

作者： Yingxin Wang Jun Xie Zhanming Liang Lixiong Han Zhenhua Fan Jinggang Zeng Jihong Zhang Dehua Xiong State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 PR China State Key Laboratory of Advanced Glass Materials Wuhan University of Technology Wuhan 430070 PR China Hepu Research Center for Silicate Materials Industry Technology Hepu 536199 PR China Chongqing International Composite Material Co. Ltd. Chongqing 400082 PR China

The rapid advancement and application of 5G/6G systems, has increased the demand for low dielectric glass fibers in high-frequency applications. However, challenges remain in optimizing their structure to improve the glass's thermal compatibility and performance at GHz frequencies. This study focused on SiO 2 -Al 2 O 3 -B 2 O 3 -RO-TiO 2 alkali-free aluminosilicate glass and investigated the effect of mixed alkaline earth metals (CaO and MgO) on the glass structure. Furthermore, the relationship between the glass structure and its properties was analyzed. Several techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and magic-angle spinning nuclear magnetic resonance (MAS-NMR) were employed to conduct both qualitative and quantitative analyses the structure of glass. The study also evaluates the glass transition temperature, thermal expansion coefficient, high-frequency dielectric properties (ranging from 0.6 to 10 GHz), density, and chemical stability of this aluminosilicate glass. Experimental results indicate that when the CaO/MgO ratio is 1:4, the glass exhibits an optimal performance, achieving the lowest coefficient of thermal expansion (α =2.97 × 10 −6 / °C) and the lowest dielectric constant (4.36 at 10 GHz). Both the FTIR and MAS-NMR results reveal that the introduction of mixed alkaline earth metals optimizes the tetrahedral network structure of this glass, leading to an enhanced performance. This study highlights the role of the alkaline earth metal mixing effect in adjusting the glass composition, providing valuable insights into the critical structure-property relationship of low-dielectric, low-expansion glass fibers and contributes to both high-frequency applications and practical production.

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All-Solid-state Proton-Based Tandem Structure Achieving Ultrafast Switching Electrochromic Windows

Research Square

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Research Square 2021年

作者： Shao, Zewei Huang, Aibin Ming, Chen Bell, John Yu, Pu Sun, Yi-Yang Jin, Liangmao Ma, Liyun Luo, Hongjie Jin, Ping Cao, Xun State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai201899 China University of Chinese Academy of Sciences Beijing100049 China Chemistry Physics and Mechanical Engineering Science and Engineering Faculty Queensland University of Technology BrisbaneQLD4001 Australia State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing100084 China State Key Laboratory of Advanced Technology for Float Glass Anhui Bengbu233000 China School of Materials Science and Engineering Shanghai University Shanghai200444 China Materials Research Institute for Sustainable Development National Institute of Advanced Industrial Science and Technology Nagoya463-8560 Japan

All-solid-state electrochromic devices (ECDs) for smart-window applications currently suffer from limited ion diffusion speed, which lead to slow coloration and bleaching processes. Here, we design an all-solid-state tandem structure with protons as diffusing species achieving an ultrafast switching ECD. We use WO3 as the electrochromic material, while poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) as the solid-state proton source to enable fast switching. This structure by itself exhibits low optical modulation (i.e., difference of on/off transmittance). We further introduce a solid polymeric electrolyte layer on top of PEDOT:PSS to form a tandem structure, which provides Na+ ions to PEDOT:PSS and pump protons there to the WO3 layer through ion exchange. Our new all-solid-state ECD features high optical modulation (>92% at 650 nm), fast response (coloration to 90% in 0.7 s and bleaching to 65% in 0.9 s and 90% in 7.1 s) and excellent stability (2) as well as flexible devices are fabricated to demonstrate the great potential for scaling up. © 2021, CC BY.

关键词： Tungsten compounds

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Research on low-temperature glass sealing of 50%Si/Al shell 21

Research on low-temperature glass sealing of 50%Si/Al shell

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21st International Conference on Electronic Packaging technology, ICEPT 2020

作者： Hao, Xinfeng Niu, Jitai Xu, Bo Wang, Zhenjiang Nanjing Research Institute of Electronics Technology Quality Department Nanjing210039 China Harbin Institute of Technology State Key Laboratory of Advanced Welding and Joining Herbin150001 China Key Laboratory of Special Glass Preparation and Processing of Building Materials Industry China Building Material Academy Beijing100024 China Henan Polytechnic University School of Materials Science and Engineering Jiaozuo454003 China

ISBN: (纸本)9781728168265

In view of the problems in the brazing process of the Radio frequency (RF) microwave channel in Si/Al packaging shell, the technical requirement of low-temperature glass sealing of Si/Al packaging shell was analyzed. The feasibility of the glass material with low sealing temperature, low expansion coefficient and low dielectric property was proved by theory and experiment. The single glass material could not meet the requirement of low temperature sealing and radio frequency transmission. Therefore, the composite glass insulator of DM305 high-temperature glass column with low-temperature glass ring wrapped was designed. The low sealing temperature, low expansion coefficient and low dielectric constant can be obtained by this composite structure. The sealing structure is compatible with the plating and packaging process of 50%Si/Al Shell, which is suitable for engineering application. © 2020 IEEE.

关键词： Temperature

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Activation-independent biphasic liquid metal conductor enables multilayer stretchable electronics

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Materials Today 2025年

作者： Wei Gu Qingyu Guo Yuhao Zhang Yaogang Li Qinghong Zhang Kerui Li Chengyi Hou Hongzhi Wang State Key Laboratory of Advanced Fiber Materials College of Materials Science and Engineering Donghua University Shanghai 201620 PR China Engineering Research Center of Advanced Glass Manufacturing Technology Ministry of Education College of Materials Science and Engineering Donghua University Shanghai 201620 PR China

Liquid metal-based polymer composites are extensively employed in diverse stretchable electronics. Achieving initial conductivity and strain insensitivity typically necessitates activation or sintering. Therefore, the development of a facile, activation-independent stretchable conductor is critical for advancing liquid metal-based polymer composites. However, the mechanisms underlying activation-independent initial conductivity and strain insensitivity in these liquid metal-based conductors remain unclear and require further investigation. Furthermore, antibacterial properties and biocompatibility are essential for strain-insensitive conductors to reduce microbial infection risks and ensure safe interaction with biological tissues. Here, we present the synthesis of a two-component hydrogel-like liquid metal composite slurry without additional conductive components. The resulting solid–liquid biphasic conductor (SLBC), patterned from the slurry, exhibits a network topology with activation-independent initial conductivity (20974 S/cm), strain insensitivity (R/R 0 ≈ 21.12 at 2200 % strain), excellent cyclic stability (over 40,000 cycles), multilayer vertical interconnect accesses (VIA) connectivity, and antibacterial properties and biocompatibility. Additionally, we developed a multilayer stretchable wireless ECG patch that facilitates real-time monitoring of personal states via a deep learning model, demonstrating the reliability, versatility, and practicality of the SLBC.

关键词： Activation-independent Antibacterial properties and biocompatibility Deep learning model EGaIn (Eutectic Gallium-Indium) Multilayer stretchable wireless ECG patch Solid-liquid biphasic conductor Strain insensitivity

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Unraveling the relationship between the multilayer network structure and mechanical properties of alkali-free aluminosilicate glass

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Journal of Materiomics 2025年

作者： Yong Yang Xin Cao Tingting Yao Jiang Han Hua Zhai Shan Wang Haolin Yang Bingjie Wang Gang Zhou Wentao Hu Lifen Shi Shuyong Chen Xusheng Qin Shou Peng State Key Laboratory of Advanced Glass Materials CNBM Research Institute for Advanced Glass Materials Group Co. Ltd Bengbu 233000 Anhui China College of Materials Science and Engineering Dalian Jiaotong University Dalian 116028 Liaoning China School of Mechanical Engineering Hefei University of Technology Hefei 230009 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Innovation Center for Advanced Glass Materials (Anhui) Co. Ltd Bengbu Anhui 233000 China

Alkali-free aluminosilicate glass has several advantages, including a low thermal expansion coefficient and density, high elastic modulus, and excellent chemical and thermal stability, making it an ideal substrate material for TFT-LCD and OLED applications. Understanding the relationship between the composition-microstructure-properties of this glass is crucial for designing materials with optimal properties and suitable process parameters. In this work, we investigated how the composition affects the microstructure and properties of alkali-free aluminosilicate substrate glass. We elucidated the relationship between composition-microstructure-properties through experiments and molecular dynamics simulations. As B 2 O 3 replaced Al 2 O 3 in the glass, the content of [AlO 4 ] in the network structure decreased, while the amounts of [BO 3 ] and [BO 4 ] increased. The triangular structure of [BO 3 ] expanded the network, reduced its connectivity, and loosened the overall structure. Consequently, the glass melt's viscosity, viscous activation energy, and melting temperature decreased. This study provided essential data and a theoretical foundation for industrial production based on the composition-microstructure-properties relationship.

关键词： Alkali-free aluminosilicate glass Composition-microstructure-properties Molecular simulation Short-range microstructure Mid-range microstructure

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Ambient-Air-Processed Solvent Engineering for Efficient and Stable CsPbI3 Inorganic Perovskite Solar Cells

SSRN

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SSRN 2025年

作者： Gu, Yinsheng Sun, Jia Yang, Yang Liu, Chang Jiang, Jiwen Zhang, Kuanxiang Lu, Yingwei Luo, Paifeng School of Materials Science and Engineering Hefei University of Technology Anhui Hefei230009 China Engineering Research Center of High Performance Copper Alloy Materials and Processing Ministry of Education Hefei University of Technology Hefei230009 China State Key Laboratory of Advanced Glass Materials CNBM Research Institute for Advanced Glass Materials Group Co. Ltd Anhui Bengbu233090 China Triumph Photovoltaic Materials Co. Ltd. Anhui Bengbu233090 China

Inorganic CsPbI3 perovskite solar cells (PSCs), with outstanding thermal stability and appropriate optical band gap, are regarded as promising candidates for efficient single solar cells and the top sub-cell in tandem solar cells. Nevertheless, the substantial internal defect recombination and stringent preparation process conditions impede its further advancement. To obtain stable β-CsPbI3 film under open-air conditions, 1,4-phenyldimethylamine iodine (PhDMAI2) is selected as additive for the first time to prevent water erosion and regulate the intermediate phase transition during annealing. The systematic experimental results reveal that PhDMAI2 can accelerate the rate of intermediate phase conversion to β-CsPbI3 and build better energy level structure between perovskites (PVK) and hole transport layer (HTL), which effectively diminishes the quantity of pinholes and enhances the transportation and extraction of charge carriers at the interface. To further expand the application field in tandem or flexible devices, RbCl-doped SnO2 is adopted to replace the commonly used high temperature TiO2 as the electron transport layer (ETL), which not only enhances the electron transport capacity but also reduces the manufacturing temperature to below 200 ℃. Finally, the CsPbI3 PSCs with a PCE of 18.54% was achieved via a doping solvent engineering, which is one of the highest PCE values of SnO2 based CsPbI3 PSCs fabricated in ambient air. © 2025, The Authors. All rights reserved.

关键词： Cell engineering

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