JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 59
·期 2
·715-727
·
IF 4.5
Li Bin,Zhou Mengjing,Wu Aolin,Liu Haiying,Du Li,Su Lihua
Preparation of composite hydrogels by in situ polymerization (SP) using choline chloride (ChCl), acrylamide (AM), and urea (U) as raw materials for deep eutectic solvent (DES), with the introduction of PVA and PVDF as fillers into DES. Characterization of the composite hydrogels was conducted using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). This study analyzed the pressure sensitivity, piezoelectricity, swelling behavior, and mechanical properties of the composite hydrogels. The results indicate that due to the dipole–dipole interactions between PVA and PVDF, the composite hydrogels exhibit excellent pressure sensitivity and piezoelectric performance. When the ratio of PVA to PVDF is 1:1, the composite hydrogels exhibit optimal performance, with a 3.37-fold increase in pressure sensitivity and a 6.49-fold increase in piezoelectricity compared to other ratios. This research provides a method for preparing composite hydrogels with excellent piezoelectric performance and pressure sensitivity.
研究领域:
材料科学
·
高分子科学
·
化学工程
·
纳米技术
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DOI
高影响因子
ACS Applied Polymer Materials
·
2026
·Vol. 8
·期 15
·12549-12562
·
IF 5.2
Wang He,Sun Yanlin,Wang Huili,Feng Qingsong,Zhu Wenle,Song Zhaoping,Liu Xiaona,Liu Wenxia
The use of natural biomass to construct sustainable,
flexible sensors
has gained significant attention. In this work, we report a cellulose-polyacrylamide
(PAM) dual-network architecture derived from corn stalk pith (CSP).
A cellulose scaffold is first obtained via in situ delignification
and dissociation of cellulose microfibrils from CSP, followed by the
in situ polymerization of acrylamide (AM) and MXene (MX) to form the
PAM network, producing the composite (CSP-AM-MX). The resulting dual-network
structure exhibits outstanding elasticity and a favorable sensing
performance. It can withstand up to 80% compressive strain with extremely
low hysteresis and maintains structural integrity without noticeable
deformation after 1000 loading–unloading cycles. The CSP-AM-MX
sensor shows excellent electrical conductivity and sensing sensitivity,
enabling reliable operation over a broad pressure range of 9–705
kPa with a fast response time. Potential applications include human
activity monitoring, force warning systems, and Morse-code conversion.
This work not only provides a green and sustainable route for valorizing
agricultural waste but also demonstrates the promising potential of
biobased polymer networks in flexible electronics, human–machine
interaction, and health monitoring.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 17
·8050-8061
·
IF 3.3
Yihao Bao,Ying Wang,Ningyi Yuan,Jianning Ding
Conductive hydrogels are widely used in biosensors, human–machine interfaces, and health recording electrodes. In this study, acrylamide and gelatin were introduced into the hydrogel. A conductive double-network hydrogel with high mechanical properties was prepared using the photoinduced one-pot method. The thermally reversible physical crosslinked gelatin constructed the first network, and the covalently crosslinked polyacrylamide formed the second one. The double networks increased the cross-linking strength between hydrogels; however, they dissipated energy and enhanced the mechanical properties. The addition of potassium chloride provided electrical conductivity for the hydrogels. The prepared double-network conductive hydrogel had high mechanical properties (tensile strength >800 KPa and tensile strain >1200%), good electrical conductivity (conductivity >0.9 S m−1), and excellent sensitivity (the gauge factor reached 1.88 when the strain was 400%). Moreover, a wide range of strain sensors was demonstrated based on gelatin/PAM DN hydrogels with high stability and durability, showing potential applications in wearable and fast response electronics.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Longxiadi Zhou,Liang Yi,Long Yan,Zhisheng Xu
The decorative and fireproof performance degradation of the grouting fireproof glass exposed to UV irradiation limits its application in the fire protection of buildings. To solve this issue, a transparent polyacrylamide/polyvinyl alcohol (PAM/PVA) interpenetrating network hydrogel was designed to prepare grouting fireproof glass with enhanced theheat insulation and anti-aging properties. The results show that the light transmittance of PAM/PVA interpenetrating network hydrogel decreases with the increased content of PVA, and a proper content of PVA in the PAM/PVA interpenetrating network is beneficial to maintain high optical transparency in the resulting hydrogel. Heat insulation test shows that the PAM/PVA interpenetrating network improves the water-locking ability of the resulting hydrogels, and the fireproof glass containing 3 wt% PVA shows the lowest backside temperature of 92.6 °C at 3600 s, which is 51.9% lower than that of fireproof glass with PAM only. Thermogravimetric (TG) and differential scanning calorimetry (DSC) analysis show that the PAM/PVA interpenetrating network hydrogel improves the thermal stability and charring ability of hydrogel, and the hydrogel containing 3 wt% PVA exhibits the best charring effect among the samples, showing the highest residual yield of 39.2 % at 800 °C. The analyses of decomposition products and char residues show that the PAM/PVA interpenetrating network hydrogel can extend the heat absorption process of water evaporation and improve the gas flame retardant efficiency. Accelerated aging test shows that the presence of PVA greatly slows down the blistering and yellowing phenomenon of fireproof glass, thus endowing the fireproof glass with the super durability of fire resistance. Especially, the backside temperature at 3600 s and light transmittance of the sample containing 2 wt% PVA after 168 h aging test only changed 19.2 °C and 1.9 %, respectively, compared to the those of unaged sample.
研究领域:
材料科学
·
火灾安全工程
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2023
·
IF 3.4
Qian-Ru Xiao,Si Sun
Animal oils would not only pollute the water but also block the sewer. Using hydrophilic membrane is an effective approach for oil/water separation. However, abrasion would cause the damage of the membrane and shorten their service life. In this work, we prepared a sandwich structured oil/water separation membrane (SSM) with two layers of cotton fabric and a core layer of PAM modified stainless-steel mesh via a cost-effective and facile process. The as-prepared membrane can selectively separate water from oil/water mixtures with high efficiency, high flux (beyond 6000 L m −2 h −1 ), and good reusability. Moreover, as compared with hydrogel coated mesh, the SSM exhibited good abrasion resistance, which would effectively improve the usability in real scenarios. More importantly, the SSM has successfully blocked the oil in a simulated sewer and a real sewer in the kitchen, which will help prevent sewer blockage.
研究领域:
环境工程
·
材料科学
·
水处理
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DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2020
·
IF 3.57
Sittipranee Ploychompoo,Qianwei Liang,Xin Zhou,Chen Wei,Hanjin Luo
Contamination of drinking water with heavy metals, particularly arsenic (As), is a persistent problem with serious public health implications worldwide. In this study, we present a zinc based metal-organic framework (Zn-MOF-74) and polyacrylamide polymer (PAM) coated on reduced graphene oxide (rGO) as an effective adsorbent for the removal of arsenite (As(III)) from water. Zn-MOF-74 nanoparticles were prepared by room-temperature precipitation and these were immobilized on rGO surface grafted PAM by a free-radical polymerization method, (Zn-MOF-74/rGO/PAM nanocomposites). The experimental data correlates well with the pseudo-second-order kinetic model and Langmuir isotherm, and the maximum adsorption capacity ( q max ) was 282.4 mg g −1 at pH 10, 298 K. The removal efficiency was rapid, removing more than 99.8% of As(III) from a 0.2 mg L −1 solution and achieving drinkable levels in 15 min. Thermodynamic data revealed that the process was spontaneous and endothermic. Furthermore, the adsorbent revealed high stability in pH range 4–10 and could be reused at least four times. Adsorption mechanism involved a synergistic combination of chemisorption and physisorption. FTIR and XPS analyzes revealed that the amide group (–NH 2 ) and hydroxyl group (–OH) on Zn-MOF-74/rGO/PAM dominate in their adsorption.
研究领域:
环境科学
·
材料科学
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水处理
·
纳米技术
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Zhi-Chao Xiao,Yan Li,Cheng-Lu Liang,Rui-Ying Bao,Ming-Bo Yang,Wei Yang
Up to now, how to endow the electrode, composed of the high theoretical capacity materials, with high capacity and high capacity retention for lithium ion batteries (LIBs) is still a great challenge. Herein, for the anodes of LIBs, multi-layered GO-Fe 3 O 4 @PDA-PAM (graphene oxide-Fe 3 O 4 @polydopamine-polyacrylamide) composites, in which Fe 3 O 4 nanoparticles (NPs) are confined by the polydopamine (PDA) shell and reduced graphene oxide (rGO) sheets, are fabricated through a green and scalable strategy. The multi-layered structure with confined Fe 3 O 4 NPs endows the anodes with efficient cushion effect and good electrical conductivity , leading to a good lithium ion storage capacity. More interestingly, GO-Fe 3 O 4 @PDA-PAM flakes are generated driven by the electricity and grabbed by PAM linker to form the flower-like morphology and well-maintained during the following electrochemical process. The flower-like anode holds up the aggregation of active materials and provides abundant lithium ion diffusion pathway. Therefore, based on the entire composite mass, the flower-structured GO-Fe 3 O 4 @PDA-PAM anode displays a high reversible capacity, a good cycle reversibility (1204 mAh g −1 after the 100th cycle at 0.3A g −1 ) and an admirable rate performance (702 mAh g −1 at 1A g −1 ).
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Mingyang Li,Yanen Wang,Qinghua Wei,Juan Zhang,Yalong An,Xiaohu Chen,Zongru Li,Dezao Jiao
With the growing demand for green and biocompatible flexible sensors, hydrogels have drawn attention as a new material for flexible wearable devices. However, it remains a challenge to develop hydrogel flexible sensors with excellent mechanical properties, high toughness, high sensitivity and fast response through a simple approach. In this work, hydrophobic associations and cellulose nanofibers were introduced into a polyacrylamide/polyvinyl alcohol (PAM/PVA) dual-network hydrogel. The incorporation of a hydrophobic system strengthens the first polymer network, while cellulose nanofibers (CNF) enhance the second PVA freeze-thaw network. Notably, CNF tightly bridges the dual networks, forming extensive hydrogen bonds with the reinforced double-network structure. Under the synergistic effects of multiple networks and hydrogen bonding interactions, the composite hydrogel exhibits superior mechanical performance (1.82 MPa), outstanding toughness (5.41 MJ/m 3 ), excellent fatigue resistance, and good recovery properties. Additionally, the composite hydrogel demonstrates superior electrical conductivity, high sensitivity (GF = 7.89), and stable electrical signal output. It performs exceptionally well in practical applications, such as monitoring motion at human joints and integrating with peripheral circuits to control robotic hands. In summary, this work presents a simple and cost-effective method for fabricating high-performance composite hydrogels, which show great potential in tissue engineering, flexible electronics, and human-computer interaction.
研究领域:
材料科学
·
高分子科学
·
纳米技术
·
生物医学工程
·
柔性电子学
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DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Ru Zhang,Chengfeng Wu,Wenyan Yang,Chunhuai Yao,Yidan Jing,Ningya Yu,Shengpei Su,Sakil Mahmud,Xiaomin Zhang,Jin Zhu
Cellulose-based hydrogel electrolytes have important application prospects in flexible solid-state supercapacitors due to the renewability and high toughness of their raw materials. Currently, cellulose-based hydrogel electrolytes are generally prepared by a bottom-up strategy, which also has poor mechanical properties and low capacitance of the hydrogel electrolytes. These issues need to be further solved. Herein, employed an innovative top-down fabrication approach, utilizing meticulously organized delignified wood as a structural framework, and concurrently integrated polyacrylamide (PAM) and sodium alginate (SA) within this framework, creating a continuous conductive network. Furthermore, multi-walled carbon nanotubes (CNTs) have been introduced as conductive additives. This addition has imparted substantial mechanical robustness and exceptional electrical performance to the wood-based hydrogel. When the concentration of CNTs in the hydrogel precursor solution is 10 mg/ml, the resulting hydrogel electrolyte, denoted as CWH-10, demonstrates a remarkable enhancement in both mechanical strength and electrical conductivity compared to hydrogels modified using conventional techniques. This straightforward fabrication method presents an innovative and promising approach for producing high-strength, bio-based hydrogel electrolytes, with potential applications spanning various fields.
研究领域:
材料科学
·
能源技术
·
化学工程
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jian Zhou,Fengling Zhuo,Xinxin Long,Ying Liu,Haibao Lu,Jikui Luo,Lei Chen,Shurong Dong,YongQing Fu,Huigao Duan
Flexible sensors which are highly stretchable, sensitive, and self-adhesive are critically required for wearable electronics, personalized healthcare monitoring and electronic skins. Conductive hydrogel-based sensors hold great promises for this purpose. However, it remains a critical challenge to integrate all the critical functions ( e.g. , remarkable stretchability, high sensitivity, and self-adhesiveness) into one hydrogel. Here, we propose a bio-inspired hybrid hydrogel framework with a hierarchical configuration that incorporates sodium casein, polydopamine, calcium chloride, and graphene oxide into a polyacrylamide hydrogel. Multiple interpenetrating network architectures and their strong interactions provide superior stretchability of 10,300%, high strain sensitivity with a gauge factor of 13.45 over a broad strain range, robust adhesiveness, fast responsiveness, and excellent reproducibility. This hydrogel-based wearable sensor demonstrates outstanding sensing performance in detecting, quantifying, and remotely monitoring human motions through integration into a cloud platform. A durable glove is further developed using the hybrid hydrogel for wirelessly controlling synchronized motions of a manipulator and accurately recognizing hand gestures. This hybrid hydrogel has shown wide-range applications in fields including wearable electronics, human–machine interfaces, and electronic skins.
研究领域:
材料科学
·
可穿戴技术
·
生物医学工程
·
电子学
·
传感器
·
人机接口
·
机器人技术
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DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Qinzheng Hu,Shuzhen Cui,Kanjun Sun,Xiuting Shi,Wenxing Miao,Xiangbing Wang,Hui Peng,Guofu Ma
In recent years, the research focus of flexible supercapacitor is to improve its energy density . The recently reported improved energy storage method is to introducing suitable redox-additive in gel electrolytes to enhance their redox-activity. Herein, a novel stretchable, redox-active and double-network 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxy-containing polyacrylamide/alginate/H 2 SO 4 (PAM/SA/H 2 SO 4 /TEMPOL) hydrogel electrolyte is prepared by radical cross-linking polymerization and solvent displacement process. The PAM/SA/H 2 SO 4 /TEMPOL hydrogel possesses superior stretchability (750 %) because of the electrostatic interactions between the -NH 3+ groups of the PAM and the -COO − groups of SA . In addition, the introduction of the TEMPOL additive into PAM/SA/H 2 SO 4 /TEMPOL hydrogel electrolyte of flexible EDLC can gain a high specific capacitance (386 F g −1 ) and high energy density of 24.5 Wh kg −1 , which is due to dual redox reactions both positive/negative electrode. This study provides a new strategy for designing a multifunctional redox hydrogel electrolyte.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
ChemSusChem
·
2024
·Vol. 17
·期 18
·e202400479
·
IF 7.5
Qingyuan Wang,Yumeng Liu,Zidong Zhang,Peng Cai,Haomiao Li,Min Zhou,Wei Wang,Kangli Wang,Kai Jiang
As a potential material to solve rampant dendrites and hydrogen evolution reaction (HER) problem of aqueous zinc metal batteries (AZMB), hydrogel electrolytes usually require additional additives or multi-molecular network strategies to solve existing problems of ionic conductivity, mechanical properties and interface stability. However, the intrinsic zincophilic properties of the gel itself are widely neglected leading to the addition of additional molecules and the complexity of the preparation process. In this work, we innovatively utilize the characteristics of acrylamide‘s high zincophilic group density, activating the intrinsic zincophilic properties of PAM gel through a simple concentration control strategy which reconstructs a novel zinc-electrolyte interface different from conventional PAM electrolyte. The activated novel gel electrolyte with intrinsic zincophilic properties has high ionic conductivity and effectively suppresses water activity, thereby inhibiting HER corrosion. Meanwhile, it induces uniform deposition of (002) crystal planes, leading to excellent deposition kinetics and long cycle life, thereby ensuring high interfacial stability. Compared with conventional PAM gel electrolytes, the activated zincophilic group-rich hydrogel maintained excellent cycling stability (1 mA/cm 2 , 1 mAh/cm 2 ) over 2250 hours; The Zn//MnO₂ coin cell using novel zincophilic group -rich hydrogel still retains a high specific capacity of more than 170 mAh/g at 0.5 A/g after 1000 cycles. Graphical We employ a high-concentration activation strategy and a dual-ion shielding effect to activate traditional PAM materials, leveraging their “intrinsic” zincophilic properties. This gel exhibits dynamic reconstruction of the metal-electrolyte interface during electrochemical cycling, promoting uniform deposition of (002) crystal planes, which leads to excellent deposition kinetics and a highly durable deposition-stripping process.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
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DOI
高影响因子
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