BIOMACROMOLECULES
·
2024
·
IF 5.5
Kai Liu,Zhipeng Zhao,Siyu Zheng,Afei Liu,Yingyue Wang,Lihui Chen,Qingxian Miao
Traditional hydrogel-based wearable sensors with flexibility, biocompatibility, and mechanical compliance exhibit potential applications in flexible wearable electronics. However, the low sensitivity and poor environmental resistance of traditional hydrogels severely limit their practical application. Herein, high-ion-conducting poly(vinyl alcohol) (PVA) nanocomposite hydrogels were fabricated and applied for harsh environments. MXene ion-conducting microchannels and poly(sodium 4-styrenesulfonate) ion sources contributed to the directional transport of abundant free ions in the hydrogel, which significantly improved the sensitivity and mechanical–electric conversion of the nanocomposite hydrogel-based piezoelectric and triboelectric sensors. More importantly, the glycerol as an antifreezing agent enabled the hydrogel-based sensors to function in harsh environments. Therefore, the nanocomposite hydrogel exhibited high gauge factor (GF) at −20 °C (GF = 3.37) and 60 °C (GF = 3.62), enabling the hydrogel-based sensor to distinguish different writing letters and sounding words. Meanwhile, the hydrogel-based piezoelectric and triboelectric generators showed excellent mechanical–electric conversion performance regardless of low- (−20 °C) or high- (60 °C) temperature environments, which can be applied as a visual feedback system for information transmission without external power sources. This work provides self-powered nanocomposite hydrogel-based sensors that exhibit potential applications in flexible wearable electronics under harsh environmental conditions.
研究领域:
材料科学
·
柔性可穿戴电子
·
传感器技术
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产品关联
DOI
PubMed
高影响因子
DRUG DELIVERY
·
2020
·
IF 4.902
QingQing Leng,Yue Li,XianLun Pang,BiQiong Wang,ZhouXue Wu,Yun Lu,Kang Xiong,Ling Zhao,Ping Zhou,ShaoZhi Fu
Skin repair remains a common problem in plastic surgery. Wound dressing plays an important role in promoting local skin healing and has been widely studied. This study aimed to manufacture a composite film (CPCF) containing curcumin nanoparticles, collagen, and polyvinyl alcohol (PVA) to effectively promote the healing of skin wounds. Sustained drug release from the composite film provides long-term protection and treatment for skin wounds. Both antibacterial property and good histocompatibility of the CPCF were examined by analyzing antibacterial activity and cytotoxicity to validate its applicability for wound management. Moreover, in vivo studies proved that the CPCF had a rapid healing rate of 98.03%±0.79% and mature epithelialization on day 15 after surgery. Obvious hair follicles and earlier re-epithelialization was also noticed in the CPCF group using H&E staining. The result of Masson’s trichrome staining confirmed that CPCF could promote the formation of collagen fibers. In summary, CPCF may be promising as a wound dressing agent in wound management owing to its rapid wound-healing effects.
研究领域:
材料科学
·
生物医学工程
·
药剂学
·
伤口愈合
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Li He,Jinquan Wang,Sen Weng,Xiancai Jiang
Hydrogel electrolytes have shown great promise in the field of flexible energy storage. However, the conventional hydrogel electrolytes have poor mechanical properties and are not recyclable. In addition, conventional hydrogel electrolytes cannot adapt to low and high temperature operating environments. In this study, starch/PVA/dimethyl sulfoxide/CaCl 2 (SPDC) organohydrogel was prepared by the freezing-thawing method. Dimethyl sulfoxide (DMSO) and CaCl 2 was introduced to enhance the mechanical properties and widen the working temperature range of the starch/PVA hydrogel. The SPDC organohydrogel had high strength, toughness and good recyclability. The SPDC organohydrogel and the recycled SPDC organohydrogel was used as the electrolyte to assemble the flexible supercapacitor with activated carbon as the electrode. The supercapacitor prepared by SPDC organohydrogel electrolyte exhibited high areal capacitance of 156.50 mF/cm 2 at a current density of 1 mA/cm 2 and high capacitance retention rate of 82.23 % after 8000 cycles of charging and discharging. The supercapacitor prepared by the recycled organohydrogel electrolyte exhibited a high capacitance retention rate of 97.58 %. In addition, the supercapacitor could withstand different angular bending shapes and had wide temperature adaptability from −20 °C to 80 °C. The work provided a new version for the development of “green” hydrogel electrolyte for all-solid-state supercapacitor.
研究领域:
材料科学
·
能源存储
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Zewen Lu,Jingbo Mu,Chaowen Guan,Shufeng Zhao,Tianshuo Sui,Shimin Liao,Zengcai Guo
There has been extensive research on conductive hydrogels, however, the current lack of practical applications is a significant issue. The crucial challenge lies in effectively integrating conductive hydrogels into practical use. Here, a uniform multifunctional hydrogel was facilely fabricated by integrating nitrogen-doped carbon capsules (N-Cc) and g-C 3 N 4 to PEO/PVA hydrogels (VECGNC). The introduction of a double network structure through carbon material endows the VECGNC hydrogel with exceptional mechanical strength (stress: 47.2 kPa; strain: 318 %) and high electrical conductivity (0.025 S cm −1 ). And it showed a good linear relationship between the temperature and pressure difference. Taking advantage of these properties, a logic gate circuit capable of sensing external pressure changes and effecting corresponding adjustments was constructed. Moreover, the strain sensitivity hydrogel designed in this work is capable of intelligent new traffic lights. Our work offers novel insights and methodologies for the utilization of multifunctional hydrogels in multi-scenario temperature and strains ensing applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2025
·
IF 2.9
Siyu Hou,Xiya Peng,Qin Yu,Shufang Gao,Lu Li,Jian Luo
Eutectogels have emerged as versatile materials for wearable electronics, optical sensors, and biomedical applications. This study introduced the first investigation of microenvironmental basicity in poly(vinyl alcohol)/choline chloride (PVA/ChCl) eutectogels using lumichrome as a fluorescent probe. The incorporation of ChCl was demonstrated to enhance the microbasicity of PVA films, as evidenced by the significant promotion of lumichrome deprotonation. In contrast, no deprotonation occurred in deep eutectic solvents ethaline [n(ChCl):n(ethylene glycol) = 1:2], glyceline [n(ChCl):n(glycerol) = 1:2], and ChCl–water mixtures [n(ChCl):n(H2O) = 1:3 and 1:4]. Therefore, the proton acceptor in PVA/ChCl eutectogels was bound water, the same as in PVA films. Differential scanning calorimetry (DSC) experiments determined a decrease of water content in PVA films after ChCl incorporation, supporting the increased proportion of bound water in PVA/ChCl eutectogels. Our findings not only certified the enhanced microbasicity of bound water but also established a simple yet effective strategy to tune PVA films’ acid–base properties through ChCl loading.
研究领域:
材料科学
·
高分子化学
·
软物质物理
·
传感器
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Fashion and Textiles
·
2021
·Vol. 8
·期 1
·1-12
·
IF 2.2
Chen Yuanli,Fan Hui,Zha Xinlin,Wang Wenwen,Wu Yi,Xiong Yi,Yan Kun,Wang Yuedan,Wang Dong
High efficiency and anti-pollution oil/water separation membrane has been widely explored and researched. There are a large number of hydroxyl groups on the surface of silica, which has good wettability and can be used for oil-water separation membranes. Hydrophilic silica nanostructures with different morphologies were synthesized by changing templates and contents of trimethylbenzene (TMB). Here, silica nanospheres with radical pores, hollow silica nanospheres and worm-like silica nanotubes were separately sprayed on the PVA -co- PE nanofiber membrane (PM). The abundance of hydroxyl groups and porous structures on PM surfaces enabled the absorption of silica nanospheres through hydrogen bonds. Compared with different silica nanostructures, it was found that the silica/PM exhibited excellent super-hydrophilicity in air and underwater “oil-hating” properties. The PM was mass-produced in our lab through melt-extrusion-phase-separation technique. Therefore, the obtained membranes not only have excellent underwater superoleophobicity but also have a low-cost production. The prepared silica/PM composites were used to separate n-hexane/water, silicone oil/water and peanut oil water mixtures via filtration. As a result, they all exhibited efficient separation of oil/water mixture through gravity-driven filtration.
研究领域:
材料科学
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环境工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Jiajun Chen,Tiantian Yu,Gang Zheng,Wenhui Ma,Chaohui Wang,Xiaoxiao Huang,Shan Fan,Yong Zhang
Heteroatom doping and good porous structure play a decisive role in the energy storage characteristic of graphene-based supercapacitors. In this study, nanocellulose/N, S co-doped graphene composite hydrogel (NC-NSGHs) electrode materials were successfully prepared by a one-step hydrothermal method. During the reaction, ammonium sulfate was used as heteroatom source and reducing agent, nanocellulose (NC) was used as spacer and electrolyte storage container, and high a concentration of graphene oxide (GO, 4 mg mL −1 ) was used to increase the bulk density of the material. The target product NC-NSGHs have ideal pore structure, good hydrophilicity, and rich heteroatom functional groups. The aqueous symmetrical supercapacitors (SCs) assembled by NC-NSGH-50 exhibits high gravimetric specific capacitance (0.3 A g −1 , 280.6 F g −1 ), volumetric specific capacitance (0.3 A g −1 , 406.9 F cm −3 ), excellent rate performance (20 A g −1 , 81.06%) and superior cyclic performance. In addition, we added GO and NC into the PVA-KOH electrolyte system and developed a new gel electrolyte PVA-GN-KOH (PGNK). The flexible solid-state supercapacitors (FSSCs) fabricated by PGNK and NC-NSGHs display a high specific capacitance of 189.9 F g −1 (0.5 A g −1 ). Even at 20 A g −1 , the rate performance of the device can reach 60.24%. The emergence of NC-NSGHs and PGNK provides new ideas for high-performance portable supercapacitors.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Md. Zahid Hasan,Chuanghua Xu,K.Z.M. Abdul Motaleb,Md Foysal Ahmed,Jie Zhuang,Sirui Tan,Jolanta Janutėnienė,M. Mahbubul Bashar,Hu Tu,Lei Luo,Ruquan Zhang
Conductive hydrogel has drawn great concern in wearable sensors, human-machine interfaces, artificial intelligence (AI), health monitoring, et al. But it still remains challenge to develop hydrogel through facile and sustainable methods. In this work, a conductive, flexible, bendable and self-healing hydrogel (PBCM) composed of polyvinyl alcohol (PVA), borax, cellulose microfibers (CMFs) and MXene nanosheets was fabricated by a simple and efficient strategy. The carboxylated CMFs were extracted from waste ramie fibers via a one-pot ammonium persulfate oxidation method. The crystallinity and tensile strength were increased 70 % and 4 times due to the addition of CMFs and MXene compared to the pristine PVA-borax hydrogel. The incorporation of MXene nanosheets acts as multifunctional cross-linkers and energy transfer platform, promoting the electrical conductivity, stretchability and bendability of hydrogel remarkably. The PBCM-2 hydrogel exhibited the maximum electrical conductivity of 0.81 S/cm. Additionally, the dynamic borate ester linkage imparts self-healing ability to the hydrogel. The resulting PBCM-2 hydrogel demonstrated excellent resistance to fire and pH response properties. Moreover, it showed sensitivity in monitoring various human physiological movements, including finger, wrist, elbow, knee bending and drinking water, indicating its potential for wearable sensing applications like health care and sports training.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Smart Materials and Structures
·
2024
·Vol. 33
·期 3
·035003
·
IF 3.7
Ping Zhang,Yuting Ma,Baocheng Liu,Honghao Zhang
Polyvinyl alcohol (PVA) has good biocompatibility, a simple fabrication process, and environmental protection, which is very suitable for the production of triboelectric nanogenerator (TENG) applied to smart home control. However, the output performance of the TENG composed of PVA and PDMS films is not high. Previous research has explored the enhancement of PVA-based TENG performance by doping with conductive materials to modify the dielectric properties of PVA composite films. Nevertheless, this approach is associated with issues of high production costs and energy consumption. This work prepared a mullite/PVA composite material TENG (MP-TENG), the introduction of mullite induced interfacial polarization in the composite film. This effect resulted in the appearance of polarization centers, thereby enhancing the charge-sensing capability of the composite film. Consequently, the triboelectric output performance of the MP-TENG was improved. MP-TENGs with different amounts of mullite fiber doping were prepared, and the maximum output performance was obtained when the doping level reached 3 wt%. At this concentration, the composite film exhibited an open-circuit voltage of 70.89 V and a short-circuit current of 2.45 μA. An enhancement of 1.78 and 1.71 times was achieved with respect to the pure PVA-TENG, respectively. In addition, MP-TENG exhibited excellent sensing characteristics, a smart home control system was designed in conjunction with a hardware circuit, which captured hand motions and encoded them to generate binary codes to control the on/off state of the indoor home.
研究领域:
材料科学
·
能源技术
·
智能系统
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yumin Wang,Ting Xu,Lide Xu,Gan Miao,Fangchao Li,Xiao Miao,Jingwei Lu,Zhiqiang Hou,Guina Ren,Xiaotao Zhu
Adhesive hydrogels are considered to be promising interfacial adhesive materials for various applications; however, their adhesive strength is significantly reduced when immersed in liquid environments (water and oil) due to obstruction of the liquid layer or swelling in liquid, and they could not always be reused when the failure of the adhesive performance occurred. Herein, a graphite oxide/poly(vinyl alcohol) (GO/PVA) hydrogel with strong adhesion in air and under liquid environments was developed by rationally regulating the interactions of water and dimethyl sulfoxide (DMSO) in the binary liquid system. The strong interaction between water and DMSO allowed the water layer of the GO/PVA hydrogel on the hydrogel surface to act as a shield to repel oil in air, under water, and even when immersed in oil, and it also endowed the obtained hydrogel with antiswelling property when immersed in water and oil. Importantly, the GO/PVA hydrogel could serve as an advanced adhesive to firmly bond different substrates in air, under water, and under oil, and interestingly, its dry and wet adhesive performance was repeatable and recyclable. This work is expected to be an important addition to the field of adhesive soft materials.
研究领域:
材料科学
·
化学工程
·
粘合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Qi Xin,Huiwen Li,Wan Sun,Xuezhi Li,Xianqin Lu,Jian Zhao
Lignin, as an amorphous three-dimensional aromatic polymer, was able to self-assemble into lignin nanoparticles (LNPs) to realize valorization of lignin. Here, lignin-xylan extractives were extracted from grape seed (GS) and poplar by acidic THF at room temperature, and effectively produced lignin-xylan nanospheres via spin evaporation. The morphology and chemical properties of nanospheres were determined by its natural origins, consequently influencing its application. For the lignin-xylan extractive from grape seed, the lignin was composed of guaiacyl (G) and p -hydroxylphenyl (H) units and the hollowed nanospheres (GS-LNPs) with 362.72 nm diameter was produced. The extractive from poplar was composed of G-syringyl (S) typed lignin (80.30 %) and xylan (12.33 %), that can assemble into LNPs with smaller size (229.87 nm), better PDI (0.1), and light color. The hybrid particles showed the qualities of lignin and xylan, that properties led to the LNPs@PVA composite films with UV-blocking capability, strong mechanical strength and hydrophobicity, and transparency ability of visible light. P-LNPs showed better performance as the film additives, due to its lower particles size and high content of unconjugated -OH from xylan. Xylan was significant in the composite films, and lowering the xylan content resulted in the decrease of the composite film's mechanical properties and hydrophobicity.
研究领域:
材料科学
·
生物质化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2022
·Vol. 307
·期 7
·2100948
·
IF 4.402
Jinbiao Min,Zhaoxi Zhou,Jia Zheng,Caibin Yan,Hongyuan Sha,Maochun Hong,Heqing Fu
In this paper, PVA/PAA-PAM-IS/GC composite hydrogels are prepared using polyvinyl alcohol (PVA), poly acrylic acid (PAA), poly acrylamide (PAM), and iron sulfate hydrate (IS) glycerol (GC). The crosslinking network is formed by the coordination of carboxyl groups with ions, which forms PVA with semi-interpenetrating network. The mechanical properties and self-healing properties of PVA/PAA-PAM-IS/GC composite hydrogels are excellent. The stress, strain and self-healing efficiency of PVA/PAA-PAM-IS/GC composite hydrogels can reach 840 kPa, 784%, and above 95%, respectively. The antifreeze and water retention properties of PVA/PAA-PAM-IS/GC composite hydrogels are improved by glycerol. PVA/PAA-PAM-IS/GC composite hydrogels remains flexible at low temperatures and moist for a long time at room temperature. The conductivity of the hydrogel increases with the increase of temperature because the interactions between glycerol, water molecules and ammonium ions are affected by the temperature, the multifunctional conductive hydrogel can be used in strain sensing and temperature sensing. In summary, PVA/PAA-PAM-IS/GC composite hydrogels can provide a guide in the field of electronic intelligence.
研究领域:
材料科学
·
生物医学工程
✓ 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）