Gels
·
2024
·Vol. 10
·期 12
·788
·
IF 5
Xiaolei Guo,Hao Zhang,Manman Wu,Zhan Tian,Yanru Chen,Rui Bao,Jinghao Hao,Xiao Cheng,Chuanjian Zhou
Hydrogels, known for their outstanding water absorption, flexibility, and biocompatibility, have been widely utilized in various fields. Nevertheless, their application is still limited by their relatively low mechanical performance. This study has successfully developed a dual-network hydrogel with exceptional mechanical properties by embedding amino-functionalized polysiloxane (APSi) networks into a polyvinyl alcohol (PVA) matrix. This hydrogel effectively dissipates energy through dense sacrificial bonds between the networks, allowing for precise control over its tensile strength (ranging from 0.07 to 1.46 MPa) and toughness (from 0.06 to 2.17 MJ/m3) by adjusting the degree of crosslinking in the polysiloxane network. Additionally, the hydrogel exhibits excellent conductivity (10.97 S/cm) and strain sensitivity (GF = 1.43), indicating its potential for use in wearable strain sensors. Moreover, at the end of its life (EOL), the sensor waste can be repurposed as an adsorbent material for metal ions in water treatment, achieving the recycling of hydrogel materials and maximizing resource utilization.
研究领域:
材料科学
·
生物医学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 12
·5825-5831
·
IF 3.3
Cheng Zhou,Shengping Dai,Xiaoshuang Zhou,Hao Zhu,Guanggui Cheng,Jianning Ding
Inspired by the stimuli-responsive ability of biological, a variety of hydrogel have been prepared by stimulus, showing great application value in actuators, soft robots, etc. However, it is still challenging to prepare a toughness hydrogel by the way of stimuli-responsive. Herein, we constructed a novel dual-network structure PNIPAM/PVA hydrogel using reversible molecular configuration conversion of PNIPAM chains. Under the stimulus of ethanol, the elastic modulus of PNIPAM/PVA hydrogel can be increased by 47 times (5 times the change of the modulus of sea cucumbers’ tissue) and the stress can be six times of the original. The dynamic borate ester bond formed by the cross-linking of PVA and borax in the hydrogel enables rapid self-healing (η > 99%) within three minutes without external stimulus in the natural environment. In addition, PNIPAM/PVA hydrogels also showed outstanding underwater reversible thermokinetic properties (>25°) based on the hydrophilic/hydrophobic conversion of PNIPAM under thermal stimulation. The successful preparation of ethanol stimulus-enhancing self-healing PNIPAM/PVA hydrogel actuators, provides a new idea for the development of the soft underwater robots.
研究领域:
材料科学
·
生物仿生学
·
软体机器人
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 13
·5039-5046
·
IF 3.069
Yao Chen,Shihao Xu,Shuai Han,Suyun Chu,Liang Yang,Changlong Jiang
Poly(m-phenylenediamine) (PmPD) is an efficient material for the adsorption of Cr(VI). However, it is facile to aggregate in water, which reduces its adsorption capacity, and it is not facile to be separated from water. Hence, magnetic or membrane structures by compositing PmPD with other functional materials are usually synthesized to solve the above problems. Here, we utilized polyvinyl alcohol (PVA) chains to obtain a dense network structure, which embedded and constrained PmPD into the network to form a membrane. PmPD constrained in the membrane existed stably and was facilely separated from water due to the large size of the membrane. Meanwhile, the PmPD/PVA membranes showed good mechanical properties and combined both the extraordinary adsorption capacity and reusability. In this study, the maximum Cr(VI) adsorption capacity of the composite membrane structures was 498.87 mg g−1 at room temperature. The adsorption and removal mechanism can be explained by the fact that the protonated imine units adsorb Cr(VI) via electrostatic attraction; following this, Cr(VI) changed to Cr(III) by reduction and chelated on the imine units. This study demonstrated that the PmPD/PVA membrane has a great potential for the separation of Cr(VI) from wastewater due to its low-cost and high adsorption capacity.
研究领域:
环境科学
·
材料科学
✓ 已验证
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
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Biomedical Materials
·
2017
·Vol. 13
·期 1
·015012
·
IF 2.469
Hang Yao,Junpei Kang,Weichang Li,Jian Liu,Renjian Xie,Yingjun Wang,Sa Liu,Dong-An Wang,Li Ren
Cartilage repairing grafts have been widely studied, and osteochondral replacement hydrogels have proven to be an excellent method in research and clinical fields. However, it has been difficult to simultaneously solve three main issues in osteochondral replacement preparation: surface lubrication, overall mechanical support and good simulations of cell regeneration. A novel integrated bilayered hydrogel osteochondral replacement was constructed by blending polyvinyl alcohol (PVA) and β-tricalcium phosphate (β-TCP) in this study. Separated nano-ball milling with ultrasound dispersion prepared β-TCP demonstrated suitable properties of tiny particle size, high purity and ideal distribution, improving the mechanical properties of the novel integrated hydrogel, and providing a cartilage-like lubrication effect and high biocompatibility, including cytocompatibility and osteogenesis. The reinforcement of β-TCP and integrated molding technology enabled the hydrogel to demonstrate excellent component compatibility and good bonding between the two layers, which promoted the strengthening of the compression modulus and tensile modulus up to three times by mechanical testing. The surface lubrication properties of the novel osteochondral hydrogel were similar to the natural cartilage by friction coefficient characterization. The two layers of the novel integrated graft provided a considerable bio-function by co-culturing with chondrocytes and synovium mesenchymal stem cells: chondrocytes promoted adherence achieved by the upper density layer and better osteogenesis performance of the porous lower layer. The design of the bilayered β-TCP/PVA osteochondral hydrogel is promising for use in articular cartilage repair.
研究领域:
生物材料学
·
再生医学
·
组织工程
✓ 已验证
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2015
·Vol. 16
·期 8
·1772-1780
·
IF 0.881
Zhou Yingsong,Yu Junrong,Wang Xuexin,Wang Yan,Zhu Jing,Hu Zuming
Melamine-formaldehyde/polyvinyl alcohol (MF/PVA) composite membranes modified by nano silica (SiO 2 ) and silane coupling agent KH570 modified SiO 2 (KH570-SiO 2 ) were prepared. The surface properties and morphology of KH570-SiO 2 were characterized using fourier transform infrared spectrometer (FTIR), thermogravimetric analysis (TGA), contact angle measurement instrument and X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and particle size analyzer. The morphology and properties of nanoparticles modified MF/PVA membranes were also studied with scanning electron microscopy (SEM), TGA, dynamic mechanical analysis (DMA) and tensile tester. The results show that KH570 is grafted on the surface of nano SiO 2 . KH570-SiO 2 has better dispersion in MF/PVA resin than that of unmodified SiO 2 . The thermal stability, mechanical and crystallizing properties of MF/PVA membrane are increased after modified with nano SiO 2 . KH570-SiO 2 makes MF more compatible with PVA resin, and further increases the mechanical properties and thermal stability of MF/PVA membrane.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hongjian Zhang,Yi Fang,Wen Chen,Yong Zhang
Demanded by the increasing popularity of human–machine interface, wearable electronics, robots, etc., the current mainstream pressure sensing technologies could not fully fulfill the accurate and in-time sensing requirement. Ionic-based pressure sensors, which are inspired by the working mechanism of human haptic system, present several outstanding advantages and great potential. However, how to effectively control the ion transport and compensation under mechanical deformation in ionic-devices serves as a critical challenge in this new and under-developed field. In this study, we designed and constructed an ion-selective membrane based on 2D MXene to modulating the directional cations immigration in PVA hydrogels, which is the first demonstration in this field. To be specifically, the cations are trapped by the cation-selective MXene membrane due to the negative charge surface of MXene, which creating the ion concentration gradient within the PVA hydrogels and in turn the maximum power output up to 3.81 μW/cm 2 . On this basis, we prepare a concentration difference cell by placing the MXene film between two PVA hydrogels with different ionic concentration. Furthermore, the MXene film was placed between two PVA hydrogels with different moduli and the ion transport could be induced by the stress-induced inhomogeneous deformation, resulting in the formation of ionic concentration differential. Above two models were packed as the arrays to create an ionic touchpad, which is capable of detecting and differentiating various external stimuli accurately. This work explores two kinds of transport models by designing the layer arrangement of PVA hydrogels and MXene membrane, which provides a simple and versatile strategy for developing ionic-based self-powered pressure sensors.
研究领域:
材料科学
·
传感器技术
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Yang Xiang,Zan Liu,Zhilin Cheng
Herein, we successfully constructed a Cu+-doped PVA-derived mesoporous carbon@diatomite (DE) composite by virtue of N2-suffered carbonization and self-reduction at a high temperature. The structure and composition of C/Cu@DE composite adsorbents were determined by a series of characterizations. The results affirmed that Cu+ species are highly scattered in PVA-derived mesoporous carbon, which covered the DE surface. The effect of carbonization temperature on the structure and composition of the C/Cu@DE composite adsorbents were intensively investigated, indicating that the C/Cu@DE composite at an 800 °C carbonization temperature (C/Cu@DE-800 °C) showed the formation of many Cu+ species and preferable hierarchical pore properties. The adsorption experiments of benzothiophene (BT) indicated that C/Cu@DE-800 °C possessed a better adsorption capacity. The adsorption behavior of BT onto C/Cu@DE-800 °C was investigated by a variety of adsorption times, initial concentrations, and recycle times, of which the largest adsorption capacity for BT attained 34.2 mg/g. Furthermore, the adsorption kinetics, intraparticle diffusion, adsorption isotherms, and adsorption thermodynamics of BT onto C/Cu@DE-800 °C was deeply studied, which contributed to the proposed adsorption mechanism.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2025
·
IF 9.6
Weihang Wu,Hongjian Huang,Zhicheng Huang,Qinghui Wang,Zongxuan Huang,Hongwen Zhang,Dongsheng Chen,Wen Wang,Hu Zhao,Haiqing Liu,Baodong Zheng,Yu Wang
Uncontrollable hemorrhage from deep, narrow wounds poses a critical threat to life, as locating the bleeding arteries in such areas is challenging. Rapid bleeding control remains a significant challenge in pre-hospital care. Herein, an injectable hemostatic device filled with disc-like PVA sponges is developed for this objective. The pristine PVA sponge is strung as a necklace-structured sponge loaded in a foldable injector. With a novel retraction mechanism, this self-designed injector precisely deploys hemostatic sponges to deep bleeding sites, surpassing the XStat TM injector in design innovation. The PVA sponges' high porosity and unique porous structure allowed it for rapid shape recovery (<30 s) and good compressive strength. In the punctured wound, the swollen PVA sponges exert high compression to close the bleeding artery, resulting in fast-bleeding control. In the pig groin femoral artery injury model, the PVA sponge treatment resulted in a 100% survival rate during a 2-h hemostasis period, compared to a 33.3% survival rate in the cotton gauze control group. In addition, it can be easily taken out by a simple pulling. The easily applicable and removable necklace-structured PVA sponge is a highly promising hemostat for punctured wounds.
研究领域:
生物医学工程
·
创伤急救
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhimin Li,Guanhui Chen,Shuqi Gou,Xiaofang Deng,Zhongai Hu,Xiaoquan Lu
The quasi-solid-state flexible supercapacitor has been successfully built by freezing-thawing method and in-situ polymerization. The high redox activity nickel-iron layered double hydroxide (NiFe-LDH) provides certain pseudocapacitance, interacts with high conductivity reduced graphene oxide (RGO), and avoids the activity structural collapse and agglomeration. Polyvinyl alcohol (PVA) serves as a flexible framework with uniform cross-linking between the components, facilitated by the presence of abundant hydrogen bonds. Polypyrrole (PPy) is further polymerized in-situ into PVA/RGO/NiFe-LDH to improve its electrochemical performance and flexibility. The PVA/RGO/NiFe-LDH 0.40 /PPy hydrogel electrodes exhibit a high area specific capacitance of 729 mF/cm 2 at 1 mA/cm 2 . The elongation at break of the electrodes is up to 749 %, which reflects excellent tensile properties. The quasi-solid-state flexible supercapacitor has been built using PVA/H 2 SO 4 as the gel electrolyte and PVA/RGO/NiFe-LDH 0.40 /PPy as the electrodes. The device exhibits a high energy density of 15.9 µWh/cm 2 at a power density of 0.19 mW/cm 2 and the capacitance retention of 96.7 % after 10,000 charge-discharge cycles.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Weimin Yan,Chengmin Hou
Flexible electronics demand conductive films with high stability and conductivity. However, silver nanowires (AgNWs) face challenges like agglomeration and inconsistent morphology. In this study, AgNWs were synthesized via a two-step process: (1) preliminary growth using a glass fiber template and polyol method (diameter: 0.2–0.4 μm, length: 1–6 μm), and (2) secondary growth by mixing AgNWs with PVA solution followed by heat treatment. The secondary growth enhanced nanowire dimensions (diameter: 5–7 μm, length: 100–200 μm) and conductivity. The optimized film exhibited stable resistance (4 MΩ) after 5000 bends (90° and 180°) and achieved optimal performance at 100 °C/30 min. This method provides a scalable solution for flexible electronics.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 6
·1-12
·
IF 23.2
Zhao Yanlong,Zhang Xichong,Hao Yilin,Zhao Yinghe,Ding Peng,Zhai Wei,Dai Kun,Zheng Guoqiang,Liu Chuntai,Shen Changyu
Hydrogels are regarded as an ideal medium for human-machine interaction (HMI) due to their adjustable modulus and flexibility, enabling seamless interaction with smart devices. However, in the field of medical rehabilitation, most of the hydrogel-based sensors are simply used to detect the motion signals of fragments and are rarely applied to help patients with rehabilitation training and improve the efficiency of doctors’ diagnosis. This is due to the unstable sensing properties and poor mechanical properties of most hydrogels. The poor durability greatly limits the application of hydrogel-based sensors. Here, a conductive hydrogel sensor with visual temperature sensitivity and good mechanical properties (300% strain, breaking stress 0.19 MPa) is fabricated by introducing polyvinyl alcohol (PVA)-borax system combined with a freeze-thaw physical regulation strategy. The PVA/PNIPAM/PEDOT: PSS (PPP) hydrogels possess a rapid response/recovery time (200 ms/200 ms), a low detection limit of 1% strain, and good stability and durability. Furthermore, by integrating the hydrogels with a LabVIEW circuit program and wireless transmission technology, we have created an advanced intelligent HMI system that facilitates monitoring, rehabilitation training, and remote diagnosis. Graphical
The conductive hydrogel sensor with visual temperature-sensitive change and excellent mechanical properties has been successfully prepared by introducing PVA-borax system and freeze-thaw physical regulation strategy. The breaking strain of PVA/PNIPAM/PEDOT: PSS hydrogels achieves 300%, and the breaking stress achieves 0.19 MPa. As a strain sensor, due to the presence of the conductive polymer PEDOT: PSS, PPP hydrogel has a fast response/recovery time (200 ms / 200 ms), a low detection limit of 1% strain, and good stability and durability, enabling accurate monitoring of various human movements. By further combining PPP hydrogel sensor with the LabVIEW circuit program and wireless transmission technology, an advanced intelligent HMI system integrating monitoring, rehabilitation training and remote diagnosis has been constructed.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）