ACS Applied Electronic Materials
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2025
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IF 4.7
Runqiu Wu,Bendong Liu,Hongye Qin,Dongkun Yu,Jiahui Yang,Haibin Liu,Guohua Gao
The development of flexible wearable devices requires energy supply devices with high flexibility and stretchability. Thermoelectric ionic hydrogels possess characteristics of high flexibility and stretchability and can be used as heat conversion devices to transform low-grade heat energy into electrical energy. Recently, studies of ionic-thermoelectric hydrogels exhibit high thermopower (or Seebeck coefficient), but their raw materials are typically laced with strong alkalis or heavy metals, which makes them highly toxic and limits their potential applications. In order to enhance the thermopower in this study, we employed PEDOT:PSS as an n-type dopant in PAAm hydrogels to induce counterion condensation. This process immobilizes cations, thereby amplifying the ion-thermal migration rate disparity in the Soret effect and enhancing the thermopower. Furthermore, the thermoelectric performance was optimized by adjusting the dosage of the initiator ammonium persulfate (APS). The experimental results showed that the PEDOT:PSS/PAAm-based ionic hydrogel exhibited a high thermopower of −4.45 mV/K when the concentration of APS was 1 wt %. This study provides an approach for the preparation of low-toxicity, high-thermopower n-type thermoelectric ionic hydrogels.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Xunshuang Zhang,Junxiang Wu,Yu He,Chenhao Zhao,Minfang An,Liangbin Li
Lithium (Li) reserves in liquid resources are significantly higher than solid lithium ores and can fully meet the growing demand for Li. Lithium-ion sieves (LIS) adsorption of Li from liquid resources is one of the most promising methods. However, conventional polymeric adsorption materials encapsulate most LIS in dense structures, leading to low adsorption capacity and slow adsorption rate. Therefore, HTO-PVA/PAAm hydrogel was synthesized from titanium-type lithium-ion sieves (HTO), acrylamide, and polyvinyl alcohol by free radical polymerization. The HTO-PVA/PAAm hydrogel is characterized by a soft three-dimensional (3D) network, continuously adjustable pore structure, high specific surface area, and excellent hydrophilicity. Accordingly, the HTO-PVA/PAAm owns an excellent Li + adsorption capacity (22.16 and 31.31 mg·g −1 in pH 7.2 and 12 of LiCl solutions, respectively) among reported advanced adsorbents. 90 % of Li + is desorbed within 60 min, indicating the efficient and rapid Li + desorption response of the hydrogel. Meanwhile, this hydrogel still maintains a Li + adsorption capacity of 90 % after eight adsorption-desorption cycles, during which Ti loss is <0.42 % in each cycle. In this work, HTO-PVA/PAAm hydrogel synthesized by an environmentally friendly and low-cost approach shows great application potential as a new strategy for Li + adsorption from liquid resources.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yan Cheng,Feng Feng,Tianxue Zhu,Yanhui Zheng,Yukui Gou,Dapeng Yang,Jianying Huang,Yuekun Lai,Zhongyi Jiang
In recent years, the demand for transparent substrates (e.g. windows, mirrors and photovoltaic glass) with anti-fogging performances has increased, while conventional anti-fogging coatings, like single-component organic coatings (PVA, PAA, PAAm), show poor stability and cannot maintain their performance stably under harsh environments. In this work, KH570@TiO 2 plays the role of a bottom layer (KT coating) to increase roughness and binding, where the hydrolysis of KH570 anchors the substrate and provides active sites for the binding of the top coating, and the addition of the TiO 2 enhances UV shielding properties. A composite PVA-AAm-POSS-NH 2 gel (PAP coating) served as the top layer, which contains a large number of hydrophilic groups and thus endow the composite coating with satisfactory anti-fogging performance. The strong bonding force provided by the KT coating and the tight physical entanglement of the PAP coating endow the double-layer coating (PAPKT coating) stable anti-fogging performance (60 times of tape peeling test, 100 times of sandpaper friction test, and sand-punching test), and 48 s icing delay performance. The multi-performances make this work great potential in automotive glass as well as building facades to cope with complex situations.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 24
·10878-10895
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IF 3.553
Qiao Liyuan,Liu Cheng,Liu Chengde,Cheng Xitong,Li Yizheng,Wang Chenghao,Jian Xigao
Hydrogels find a variety of uses across various fields, but their development might be limited by their high-cost, toxic chemical crosslinking and complicated reactions. To address these issues, we developed a tough, high-strength hydrogel of polydiacetone acrylamide-co-poly(acrylamide), prepared using acrylamide, diacetone acrylamide (DAAM) and ammonium persulfate in a one-step reaction. The multiple physical crosslinking networks endow hydrogel with excellent overall properties given appropriate DAAM levels. The tensile modulus, fractured strain, fractured stress and toughness of the developed D 1 A 9 hydrogel are, respectively, as high as 0.15 MPa, 21 mm/mm, 0.71 MPa and 7 MJ/m 2 . Its compressive modulus under a strain of 80% is 0.088 MPa, while its shear modulus at a shear frequency of 100 Hz is 0.071 MPa. At the same time, D 1 A 9 hydrogel exhibits a high self-recovery efficiency of 50% during two continuous cyclic tensile tests, with the efficiency increasing to 65% for hydrogel incubated at 50 °C for 2 h. Finally, cytocompatibility and excellent drug-releasing behavior of the hydrogel make it a candidate for biomedical use.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 9
·4907-4915
·
IF 3.119
Yi Hou,Nan Jiang,Dan Sun,Yiping Wang,Xianchun Chen,Songsong Zhu,Li Zhang
Hydrogels demonstrate superior properties that favor wound healing and have been widely used in clinical settings for wound dressing applications. However, commercial hydrogel dressings often lack flexibility/adhesiveness, and do not conform well to the irregular skin surfaces of complex wounds and/or wounds near joints. As a result, the wound is likely to be exposed to potential bacterial invasion. Herein, we designed and developed a mechanically flexible and self-adhesive polyurethane-poly(acrylamide) (PU-PAAm) hydrogel for wound healing applications. The hydrogel can be cured from a novel waterborne emulsion within 90 s under UV irradiation. The PU component within the PU-PAAm hydrogel plays a “bridging” role that accelerates the formation of an interpenetrating polymer network (IPN), which consists of a physically crosslinked PU network trapped within a chemically crosslinked PAAm network. The unique IPN structure endowes the hydrogel with superior stretchability and ductility. The hydrogen bonding formation and electrostatic interaction between the hydrogel and skin ensure strong adhesion without causing irritation to skin upon dressing removal. Animal studies further confirmed the PU-PAAm hydrogel's remarkable skin regeneration capability. This work shows our new hydrogel holds a promising prospect for treatment of complicated or challenging wounds such as burns and chronic wounds.
研究领域:
生物材料学
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医学工程
·
组织修复与再生
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Qunna Xu,Xiaoyu Xu,Jianzhong Ma,Yan Zong,Kai Yan,Pengni Li
Flexible hydrogels have emerged as highly-desirable materials for wearable strain sensors. However, pristine biomass hydrogel systems are limited by their lack of stretchability, self-adhesion, and sensitivity. Here, a novel CA/MWCNT/PAAm double-network conductive hydrogel was developed through integrating casein (CA) micelles and multi-walled carbon nanotubes (MWCNT) into the polyacrylamide (PAAm) network. The resulting hydrogel displayed desired properties such as adhesiveness, toughness, self-healing, and near-infrared photothermal response. In this hybrid system, MWCNT were uniformly dispersed in the presence of casein micelles through hydrogen bonding and electrostatic interactions, favoring its role of nano reinforcement. Moreover, based on the “casein micelle-nanoparticle double cross-linking" mechanism and its double network structure, the prepared hydrogel showed high extensibility (2288 % ± 63 %), fast responsiveness (273 ± 5.13 ms), high sensitivity (GF = 12.46 ± 0.35), and a wide strain range (1–1000 %). Through consistent and repeated electrical inputs, this hydrogel was able to detect including large and small human movements, such as hand, leg, and swallowing motions. The results from this study provide a new way to fabricate bio-based hydrogel sensors with excellent mechanical and electrical properties.
研究领域:
材料科学
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生物医学工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Heng Zhu,Xiaocheng Hu,Binhong Liu,Zhe Chen,Shaoxing Qu
Electronically conductive hydrogels integrated with dielectric elastomers show great promise in a wide range of applications, such as biomedical devices, soft robotics, and stretchable electronics. However, one big conundrum that impedes the functionality and performance of hydrogel–elastomer-based devices lies in the strict demands of device integration and the requirements for devices with satisfactory mechanical and electrical properties. Herein, the digital light processing three-dimensional (3D) printing method is used to fabricate 3D functional devices that bridge submillimeter-scale device resolution to centimeter-scale object size and simultaneously realize complex hybrid structures with strong adhesion interfaces and desired functionalities. The interconnected poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) network endows the PAAm hydrogel with high conductivity and superior electrical stability and poly(2-hydroxyethyl acrylate) functions as an insulating medium. The strong interfacial bonding between the hydrogel and elastomer is achieved by incomplete photopolymerization that ensures the stability of the hybrid structure. Lastly, applications of stretchable electronics illustrated as 3D-printed electroluminescent devices and 3D-printed capacitive sensors are conceptually demonstrated. This strategy will open up avenues to fabricate conductive hydrogel–elastomer hybrids in next-generation multifunctional stretchable electronics.
研究领域:
材料科学
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电子工程
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生物医学工程
·
软体机器人
✓ 已验证
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Qixiang Zhan,Shuhua Deng,Jiayi He,Jinhua Xu,Anfu Chen,Jiajun Luo,Wenjie Zhang,Caihong Lei
The elasticity mismatch between Ti and tissue limits the performance of Ti medical devices. How to create a coating with mimicking natural soft tissue stiffness and possessing strong mechanical bond is a challenge in implant manufacturing. Here, we developed a combined coating, that is, an anodized Ti surface (ATS) with nanostructures coated with a layer of PAAm hydrogel with tunable elasticity. Due to the nano-mechanical interlocking and hydrogen bonding synergy, the PAAm hydrogel layer was tightly anchored in nanostructures on the ATS. By regulating the oxidation voltage, nanostructures including nanopores, nanotubes, and punch-through nanotubes were fabricated on the ATS, and these three kinds of anodized nanostructures increase the porosity of the ATS sequentially. The lap shear test has shown that the shear strength increases linearly with increasing the porosity, and the shear strength of the punch-through nanotube structures with the PAAm hydrogel coating reaches 59.28 kPa. The adhesion mechanism between the anodized Ti nanostructures and the PAAm hydrogel coating is mainly due to the nano-mechanical interlocking and hydrogen bonding synergy, which was proven by morphology analysis, XRD, and ATR-FTIR characterization of the samples subjected to lap shear load. The hydrogel-nanostructures coating has demonstrated the potential to be applied in Ti medical devices.
研究领域:
生物材料
·
材料科学
·
组织工程
·
机械工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）