SENSORS AND ACTUATORS A-PHYSICAL
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2024
·
IF 4.1
Jianfeng Chen,Ran Hou,Sen Li,Chuanxi Sun,Kai Peng,Yichuan Dai,Xiaoxiao Chen
As the quintessential material for flexible sensors, conductive hydrogels face an inherent sensitivity-sensing range paradox and electrical-mechanical balance, which significantly curtail its applicability in multiscale motion detection. Inspired by the spider slit sensor, PAM/CNTs-Au hydrogel microcrack sensor is obtained by depositing conductive gold film on the surface of PAM/CNTs hydrogel using magnetron sputtering. By modulating the cross-linking density of conductive hydrogels and the content of carbon nanotubes (CNTs), it is possible to tailor the mechanical properties and adhesion of PAM/CNTs-Au hydrogel crack-based sensors. This self-adhering flexible sensor aids in minimizing detection errors arising from mechanical mismatch between flexible sensors and human tissues. Moreover, the exceptional electrical conductivity of CNTs, coupled with their unique one-dimensional structure, facilitates the formation of an interconnected conductive network "bridge" within the hydrogel. The harmonization of electrical and mechanical attributes in the PAM/CNTs flexible substrate is achieved by finely tuning the crosslinking density of the PAM hydrogel and the content of carbon CNTs. Simultaneously, the high-conductivity "islands" formed by the Au conductive layer during stretching ensures elevated sensitivity (gauge factor (GF) = 54.89) over an extensive detection range (>1200%). The distinctive "island-bridge" configuration of the PAM/CNTs-Au hydrogel microcrack sensor effectively suppresses crack propagation, thereby markedly augmenting the sensor's stability. Successful monitoring of physiological and motion signals across various scales attests to the potential of the PAM/CNTs-Au hydrogel microcrack sensor in wearable biosensor.
研究领域:
生物医学工程
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柔性电子材料
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产品关联
DOI
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
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生物医学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Miao Qin,Wenfeng Yuan,Xiumei Zhang,Yizhu Cheng,Mengjie Xu,Yan Wei,Weiyi Chen,Di Huang
Conductive hydrogels based on MXene have gained more attention due to the excellent conductive property and biocompatibility. At present, they have great potential in electronic skins, personally healthcare monitoring and human motion sensing. However, MXene are prone to be oxidized due to the abundant hydroxyls , which results in the unstable conductive property of hydrogel. To improve the shortcoming, conductive PAA/PAM/MXene/TA hydrogel was prepared, in which the introduction of TA can prevent MXene from oxidation owing to the great deal of pyrogallol groups. Mechanical tests showed that the tensile strength , toughness and elongation at break of PAA/PAM/MXene/TA hydrogel are 0.251 ± 0.05 MPa, 0.895 ± 0.16 MJ/m 3 and 560.82 ± 19.56%, respectively, indicating the hydrogel possess good stretchability. In addition, the MXene and TA were introduced into hydrogel through hydrogen bonds , which endow the hydrogel with good restorability and self-healing property. Resistance variation-strain curves demonstrated that the introduction of MXene endue the hydrogel with appreciable sensing performances. Moreover, in vitro cytotoxicity assay indicated that the hydrogel has good biocompatibility. In conclusion, PAA/PAM/MXene/TA hydrogel has great potential in flexible wearable sensor field.
研究领域:
材料科学
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纳米技术
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生物医学工程
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传感器
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产品关联
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 8
·1-13
·
IF 2.9
Chen Xi,Wang Shuaiyin,Li Danni,Wang Ruiqi,Yang Shaoming,Liu Yongxin,Xu Wenyuan,Zhang Jiali
The catalytic materials for sulfate radical-based advanced oxidation processes with the performance of high activity and stable had attracted significant attention in the field of sustainable wastewater treatment. Here, a novel adsorption-reactive composite catalyst with Fe 3 O 4 impregnated acrylamide-based hydrogel (PAM-AMPS/Fe 3 O 4 ) was designed and synthesized for methylene blue (MB) degradation based on persulfate advanced oxidation processes. For the acrylamide-based hydrogel, the monomer of 2-acrylamide-2-methyl-propanesulfonic acid (AMPS) was added to improve the adsorption performance of the composite, and the maximum adsorption capacity of the selected hydrogel was about 40 mg/g. In the presence of the persulfate activated system, the degradation efficiency of MB of PAM-AMPS/Fe 3 O 4 was significantly increased to a level of 94% in 20 min. This value was far superior to catalytic systems without the AMPS. This outstanding performance was benefiting from the synergetic effects of reduced aggregation of Fe 3 O 4 combined with the enhanced adsorption capacity of PAM-AMPS hydrogel. Their cooperative function promoted oxidative decomposition of MB. In addition, PAM-AMPS/Fe 3 O 4 exhibited a good stability and reusability, and it could maintain high degradation efficiency and activity after three successive cycling tests. And at the same time, the produced dominate oxidizing species for MB degradation in the system were identified as SO 4 •− by the radical quenching experiments. This work laid a foundation for applying PAM-AMPS/Fe 3 O 4 as a highly efficient and stable catalyst for future applications and provided new insights into the design and synthesis of environmentally benign and inexpensive persulfate activators.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Nanoscale Advances
·
2025
·
IF 4.6
lily wang,Fajun Peng,Di Jin,Sen Fang,Yan Wang
As demands increase for multifunctional textiles and breathable coatings in high-humidity and high-mobility environments, the development of membranes that combine waterproofing, breathability, and mechanical durability has become a critical challenge. This study presents a novel, organic solvent-free electrospinning approach to fabricate waterborne polyurethane (WPU)-based nanofiber membranes, enhanced by polyacrylamide (PAM) as a dual-functional additive. By leveraging hydrogen bonding interactions between the –COO⁻, –NHCOO– groups in WPU and the –CONH₂ groups in PAM, the resulting composite achieved stable electrospinning, improved fiber morphology, and a significantly higher water contact angle (86.9°), compared to conventional WPU/PVA systems (<10°). The optimized WPU/PAM-3 membrane maintained high air permeability and excellent tensile strength, while also showing low water absorption (~18%) and strong structural stability under thermal, mechanical, and environmental cycling. Structural analyses via FTIR, XRD, and XPS confirmed enhanced interfacial compatibility and molecular interaction. Notably, this work eliminates the need for volatile organic solvents and hygroscopic additives like PVA, solving common limitations in traditional WPU systems. The resulting membrane offers a sustainable, high-performance solution for protective textiles, medical materials, and flexible barrier coatings, marking a significant advancement in eco-friendly, breathable membrane technology.
研究领域:
材料科学
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纳米技术
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高分子科学
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环境工程
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纺织工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Bio Materials
·
2024
·
IF 4.6
ShiJie Yu,XiaoDong Xu,Liang Ma,Fei Zhao,JinLei Mao,Jing Zhang,ZhiFei Wang
The increasing complexity and difficulty of surgical procedures have led to a rise in medical errors within clinical settings in recent years. Gastrointestinal diseases, in particular, present significant medical challenges and impose substantial economic burdens, underscoring the urgent need for experiential, high-fidelity gastrointestinal surgical training tools. This study leverages patient-specific computed tomography (CT) and magnetic resonance imaging (MRI) data, combined with 3D printed manufacturing, to develop hydrogel organ models with tunable performance and tissue-mimicking softness. These properties are achieved by regulating the freeze–thaw cycles, cross-linking agents, and the concentration of incorporated antibacterial nanoparticles in DN hydrogels. Through the application of indirect 3D printing and the “sacrificial material method”, we successfully fabricate organ tissues such as the stomach, intestines, and blood vessels with high precision. In ex vivo surgical training demonstrations, these tissue-like soft hydrogels provide an effective platform for preoperative simulation and surgical training in digestive surgery, accommodating various surgical procedures and accurately simulating intraoperative bleeding. The development of advanced bionic organ models with specific and tunable characteristics based on DN hydrogels is poised to significantly advance surgical training, medical device testing, and the reform of medical education.
研究领域:
生物医学工程
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外科医学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 2
·140
·
IF 2.8
Ma Di,He Hao,Huang Xinglan,Wang Jingcheng,Hu Xuebu
The inhomogeneous plating/stripping of zinc and side reactions originating from the dissolution of the cathode material in water lead to the poor stability of zinc anode, which inevitably limits the practical application of zinc-based aqueous batteries. Therefore, a novel hydrogel electrolyte made of hydroxyethyl cellulose/polyacrylamide (HEC/PAM) with a 3D network-like structure is synthesized by radical polymerization and cross-linking reinforcement. Thanks to the porous crosslinked network and massive hydrophilic groups, the electrolyte has high ion conductivity of 3.17 × 10 –2 S cm −2 and decomposition voltage of 2.6431 V. The ion conductive hydrophilic groups facilitate the interfacial compatibility of the electrode with the electrolyte and stabilize zinc plating/stripping, which suppresses the formation of zinc dendrites. Meanwhile, the hydrogel electrolyte effectively alleviates the dissolution of the positive electrode and the occurrence of side reactions, and subsequently improves the stability of the electrode. As a result, the assembled Zn–Zn symmetric cell with HEC/PAM hydrogel electrolyte is stable without short circuit and rapid increase of overvoltage at 5 mA cm −2 . The polarization voltage of the assembled Zn–Cu half-cell is 59.2 mV and initial coulomb efficiency reaches 94.3%. The assembled Zn–V 2 O 5 ·nH 2 O/CNT full cell delivers an excellent cycling stability of 186.9 mAh g −1 at 0.5 A g −1 after 500 cycles with a high-capacity retention of 92.5% (only 52.1% in aqueous system). The new idea is provided for further development of functional hydrogel electrolytes in zinc-ion batteries.
研究领域:
电化学
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能源材料
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功能高分子
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电池技术
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界面化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Kaijun Xie,Xin Liu,Baichuan Mo,Tingting Li,Kai Xia,Long Fang,Yihui Zou,Dongjiang Yang,Xiaodong Zhang
Gel polymer electrolytes (GPEs) have attracted much attention due to their excellent flexibility, good interface contact, and high safety in solid-state supercapacitors (SSCs). However, in practical applications, GPEs still face low ionic conductivity and poor mechanical strength. This study delineates a novel dual-cationic Kgu/PAM GPE, the ion diffusion coefficients in which are 1.51 × 10 -8 cm 2 s −1 (K + ) and 4.77 × 10 -9 cm 2 s −1 (Na + ), respectively. Radial distribution function and in-situ Fourier transform infrared spectroscopy have confirmed that the migration mechanism of dual-cations in Kgu/PAM is through the long-range hydration channels, which is depended on the continuous formation of binding water facilitated by movement of Kgu and PAM chain segments. When assembled dual-cationic Kgu/PAM GPE to a flexible solid-state asymmetric supercapacitor, it delivers a high ionic conductivity (86.9 mS cm −1 ), an excellent energy rate density (86.1 Wh kg −1 ) and outstanding power density (476 W kg −1 ). In addition, dual-cationic Kgu/PAM GPE exhibits an excellent strain threshold of 910 % and remarkable mechanical strength of 35 KPa, good flexibility and flame retardant, highlighting the potential for its practical application in various fields. Collectively, these findings herald a novel paradigm in the development of secure and efficacious flexible wearables.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Songqi Wang,Bairu Shi,Yang Shi,Wei-Guang Yang,Shuai Zhou,Tinglei Liu,Dongzhi Yang
Although polyacrylamide-based hydrogel exhibits excellent swelling and migration properties, it is more desirable for hydrogels with high compressive strength, flexible deformation, and rapid degradability for petroleum extraction. Herein, the core–shell structure PAM@PVA composite hydrogel achieves enhanced plugging strength through the Hofmeister effect of the PVA core and rapid degradability through the self-degrading ester bond of the flexible PAM shell, resulting in macroscopic and microscale hydrogels for oilfield fracturing and deep profile control. After the PVA network forms intramolecular hydrogen bonds by freeze–thaw and soaking in Na2SO4 brine, the PAM@PVA hydrogels reach a compressive strength of 5.62 MPa at 60% strain, which is three times that of PAM hydrogels. In the simulated fracturing plugging pressure resistance test, the macroscopic PAM@PVA hydrogels with the soft shell and hard core achieve a plugging strength of 2.48 MPa, effectively preventing migration during the plugging perforation process. At the high temperature (90 °C), the composite hydrogels completely degrade into polymer solution within 72 h due to the ester-bond hydrolysis of PAM and hydrogen-bond disruption of PVA. At the same time, the released linear polymers enhance oil recovery by 3%, resulting in up to 57% oil recovery. The high plugging strength, flexible deformation, and controllable self-degradation of PAM@PVA hydrogel offer a novel approach to improving oil recovery processes in petroleum engineering.
研究领域:
石油工程
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高分子科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Haiwang Wang,Li Chao,Xinfang Wei,Jinlong Li,Cheng Ji,Bingzhu Wang,Xiwei Qi,Pengcheng Hu,Yifan Ying,Mengping Tian
Nowadays, the polymer flocculation technology has been widely used in the treatment of oil sand tailings pollutants. However, the most commonly used polyacrylamide flocculant has encountered some problems, such as low flocculation efficiency and severe secondary pollution. In this paper, an organic-inorganic composite high-efficiency flocculant with self-degradation was designed and prepared. Furthermore, in order to analyze the synthesis mechanism of the composite material, the functional groups of the material were investigated by Fourier transform infrared spectroscopy (FTIR). At the same time, the morphology and structure were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Meanwhile, the crystal structure was recorded by XRD . In addition, the flocculation efficiency of the composite flocculant was determined by measuring the turbidity removal of the kaolin suspension. Apart from this, the flocculation parameters were optimized by central composite design (CCD) experimental design and response surface methodology (RSM). Finally, the self-degrading property of the flocculant was tested under light conditions. The characterization data of the material indicated that the synthesis mechanism is that under the ultraviolet light condition, the acrylamide monomer undergoes free radical polymerization under the action of active free radicals on the surface of the core-shell structure SiO 2 -TiO 2 to form an organic-inorganic composite flocculant. In addition, the optimized experimental results showed that the optimal turbidity removal conditions were followed: V TBOT /m SiO2 of 6.66 mL/g, flocculant dosage of 50 ppm and kaolin suspension concentration of 1.5 wt%. Ultimately, the degradation experiment showed that the prepared organic-inorganic composite flocculant has nice self-degradation performance, and the self-degradation efficiency reaches over 90% within two hours. In summary, this work has greatly enriched the knowledge of oil sand tailings treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Dianfa Zhao,Jie Liu,Yunshan Zhou,Lijuan Zhang,Yuxu Zhong,Yang Yang,Baoquan Zhao,Mengru Yang,Yong’an Wang
It is very important to establish a sustained-release pralidoxime chloride (2-PAM) drug system with brain targeting function for the treatment of neurotoxicant poisoning. Herein, Vitamin B1 (VB1), also known as thiamine, which can specifically bind to the thiamine transporter on the surface of the blood–brain barrier, was incorporated onto the surface of MIL-101-NH2(Fe) nanoparticles with a size of ∼100 nm. Pralidoxime chloride was further loaded within the interior of the above resulted composite by soaking, and a resulting composite drug (denoted as 2-PAM@VB1-MIL-101-NH2(Fe)) with a loading capacity of 14.8% (wt) was obtained. The results showed that the drug release rate of the composite drug was increased in PBS solution with the increase of pH (2–7.4) and a maximum drug release rate of 77.5% at pH 4. Experiments on the treatment of poisoning by gavage with the nerve agent sarin in mice combined with atropine revealed that sustained release of 2-PAM from the composite drug was achieved for more than 72 h. Sustained and stable reactivation of poisoned acetylcholinesterase (AChE) was observed with an enzyme reactivation rate of 42.7% in the ocular blood samples at 72 h. By using both zebrafish brain and mouse brain as models, we found that the composite drug could effectively cross the blood–brain barrier and restore the AChE activity in the brain of poisoned mice. The composite drug is expected to be a stable therapeutic drug with brain targeting and prolonged drug release properties for nerve agent intoxication in the middle and late stages of treatment.
研究领域:
药学
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纳米技术
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神经科学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 56
·32358-32367
·
IF 2.936
Yong Dong,Liqin Cao,Jing Li,Yongxia Yang,Jide Wang
A novel clean method to synthesis a composite monolith was developed. Given its amphiphilic property, UiO-66 can emulsify water and CO2 to format a high internal phase emulsion (HIPE) under certain conditions. These UiO-66-emulsified Pickering HIPEs can be used as templates to prepare interconnected macroporous MOF/polymer composite monoliths. The effects of UiO-66 amount, cross-linking agent concentration, and CO2–water ratio on UiO-66/PAM structures were investigated. Then, the as-synthesized MOF/PAM composites were characterized by TGA, XRD, SEM, and FT-IR analyses, as well as rheological and DMA measurements. The results indicated that the composites are interconnected with hierarchical pores, and the diameter of the voids is 10–50 μm. The directly prepared monoliths exhibited relatively high stresses at 82% strain and recovered their shape quickly. The adsorption capacity of the composites for methylene blue (MB) is 50 mg g−1 at a faster adsorption rate. The monoliths also exhibit underlying applications in edible oil–water separation.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）