ACS Applied Energy Materials
·
2023
·
IF 6.4
Huihui Zhang,Ruilin Wang,Yingying Hu,Renxin Wang,Jun Shen,Yiyang Mao,Qiang Wu,Baofeng Wang
Zinc metal anodes have been widely used in aqueous Zn-ion batteries. However, side reactions and zinc dendrites were generated on the Zn anode during cycling. These problems lead to short circuits and poor long-cycle stability of the battery. This paper reports a multiple cross-linked PAM-CMC-GG (PCG) gel electrolyte. Zinc uniformly deposited on (002) crystal surfaces under the combined effect of carboxylic acid and amide groups in PCG gel electrolyte. The behavior effectively reduces the generation of zinc dendrites. In addition, the abundant hydroxyl groups in PCG can inhibit the activity of free water and reduce the generation of solvent structures, thus suppressing the formation of byproducts. As a result, the symmetric cells assembled with PCG gel electrolyte operated stably for over 450 h at a current density of 5 mA cm–2, and Zn/Cu asymmetric cells maintained a coulomb efficiency (CE) of 99.2% for more than 500 cycles. It is expected that PCG gel electrolyte provides promising prospects for the practical application of gel electrolytes in energy storage devices.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Bionic Engineering
·
2024
·
IF 4.9
Fu Huide,Wang Ben,He Rui,Yang Yongpu,Li Hongyuan,Guo Zhiguang
Photovoltaic (PV) power generation is highly regarded for its capability to transform solar energy into electrical power. However, in real-world applications, PV modules are prone to issues such as increased self-heating and surface dust accumulation, which contribute to a reduction in photoelectric conversion efficiency. Furthermore, elevated temperatures can adversely affect the components’ operational longevity. To augment the efficiency and extend the lifespan of PV modules, it is crucial to implement cooling strategies and periodic surface dust removal. In this research, we introduce a composite PV module design that amalgamates a hygroscopic hydrogel with self-cleaning attributes. The design incorporates a superhydrophobic polydimethylsiloxane (PDMS) film as its exposed surface layer and employs a PAM-CaCl 2 -SiC hygroscopic hydrogel for rear cooling. This arrangement is intended to facilitate efficient surface self-cleaning and passive cooling of the composite PV module. Experimental studies were conducted to evaluate the performance of this innovative composite PV module design, and the results showed that the composite PV panel had an increase of about 1.39% in power generation compared to an ordinary PV panel in the spring of Shenzhen, China.
研究领域:
可再生能源
·
材料科学
·
环境工程
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Quan Zhang,Gaobo Yu,Qichang Zhou,Jiacheng Li,Yuhong Feng,Longzheng Wang,Yiyuan Tang,Yang Peng
Natural soil colloid, an important component of natural soil, has high specific surface area and strong adsorbability. Although natural soil colloids are ubiquitous in natural subsurface environments, they have not been utilized to synthesize composite materials for any practical application. In this work, a series of eco-friendly interpenetrating polymer network hydrogels integrated with natural soil colloid were synthesized via the ionic crosslinking of alginate and covalent cross-linking of polyacrylamide (PAM) in the aqueous dispersion of natural soil colloid. The natural soil colloid was extracted from the natural soil by a simple, green and sustainable process, without any formation of pollution. The swelling characteristic experiment showed that the soil colloid in polymeric matrix accelerated water absorption by the hydrogels. Hydrogels released 34.4% of pesticide and 56.9% of fertilizer loaded during 54 and 30.5 h at the slowest release rates, respectively. The release data indicated that the hydrogels could release the fertilizer and the pesticide in a slow manner. These findings show that natural soil colloid can be used as a green and sustainable modifier to improve the slow release of hydrogels. Therefore, the synthesized hydrogels integrated with natural soil colloid show great potential as carriers of agrochemicals in modern agriculture and horticulture.
研究领域:
农业科学
·
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
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
·
2022
·
IF 2.865
Fangfang Wang,Yanrang Zhang,Yang Su,Di Zhang,Nannan Xia,Yangyang Sun,Yu Liu
The preparation of value-added, chemically modified lignin-based copolymers for the use of technical lignin is crucial for green and sustainable development. Herein, we synthesized alkali-lignin-grafted polyacrylamide by atom transfer radical polymerization (ATRP). As alkali lignin (AL) has the highest total hydroxyl group content, it was modified with 2-bromoisobutyryl bromide to synthesize a lignin macroinitiator (lignin-Br) at different ratios of [OH group in AL]:[TEA]:[BiBB] = 1:1:1, 1:1.5:1.5, and 1:2:2. Acrylamide was grafted from lignin-Br with the most Br-initiating sites via ATRP. The ratios of monomer to lignin-Br used were 50:1, 100:1, and 200:1, and the synthesized copolymers (L-g-PAM) were denoted as L-g-PAM50, L-g-PAM100, and L-g-PAM200, respectively. These copolymers were characterized by Fourier transform infrared (FT-IR) and 1H nuclear magnetic resonance (NMR) spectroscopies. The FT-IR and 1H NMR results indicated that polyacrylamide was introduced into the lignin backbone of all L-g-PAM copolymers. Gel permeation chromatography of L-g-PAM showed that the Mw of L-g-PAM200 was the highest at 427,383 g/mol. Photographs and scanning electron microscopy images of L-g-PAM showed that L-g-PAM appeared as a soft sponge and contained interwoven fibers. The maximum degradation temperature (Tmax) of L-g-PAM increased with increasing monomer-to-lignin-Br ratio. Moreover, the glass transition temperature (Tg) of L-g-PAM was higher than that of AL. The alkali-lignin-grafted polyacrylamide, synthesized by ATRP, in our study has a narrow molecular weight distribution, and its soft sponge properties make it a hydrogel or another surfactant.
研究领域:
材料科学
·
高分子化学
·
可持续发展
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ruxue Yang,Zhantong Tu,Xiyue Chen,Xin Wu
With the rapid development of wearable electronic devices, flexible sensors, as the core components of wearable devices, have received extensive attention. Manufacturing of the strain sensors with excellent mechanical properties, wide working range, and high sensitivity is crucial for the development of wearable devices. Herein, for the first time we proposed a strategy based on mesh-structured conductive hydrogel to sensitively detect the body movement in a large workable strain ranges, and demonstrated the facile fabrication procedure of the sensors by using a direct ink writing 3D printing technique. Low cost conductive hydrogels were prepared by a simple one-pot method of combining dispersant-free carbon nanocolloids with easily synthesized PVA/TA/PAM. The printing of complex mesh-structured hydrogels was optimized with high fidelity. The strain sensor based on the mesh-structured hydrogel exhibited excellent mechanical properties, of which the maximum failure stress of the honeycomb was 1.28 MPa and the maximum failure tensile strain was 704 %, amazing sensitivity (GF = 32.95 for the tensile strain range of 3.5 %-5%, GF = 21.5 for the tensile strain range of 100 %-120 %), wide detection range, good stability and durability (for 500 tensile cycles, the ΔR/R 0 value remained unchanged). In addition, the working mechanism during the stretching process of mesh-structured hydrogels was revealed by combining finite element simulation with microscopic morphology observation. At last, the applications of the mesh-structured hydrogel-based sensors to accurately and reliably detect both subtle physiological signals and large joint movements were soundly demonstrated, endowing the ability of achieving all-round detection of human motion. Our work could provide a universe strategy for fabricating highly ventilated, stretchable, robust, sensitive and wearable strain sensors, which would greatly expand the applications of strain sensors in wearable devices.
研究领域:
材料科学
·
纳米技术
·
可穿戴技术
·
生物医学工程
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机械工程
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2024
·
IF 10.7
Zewei Sun,Yanqi Yin,Tianzong Jiang,Bingchen Zhou,He Ding,Shili Gai,Piaoping Yang
Enhancing the output performance of triboelectric nanogenerators (TENGs) is essential for increasing their application in smart devices. Oxygen-vacancy-rich BiO 2-x nanosheets (BiO 2-x NSs) are advanced-engineered nanomaterials with excellent piezoelectric properties. Herein, a stretchable unsymmetrical BiO 2-x NSs deposited-hydrogel made of polyacrylamide (PAM) as a multimodal TENG is rationally fabricated, and the performance of TENG can be tailored by controlling the BiO 2-x NSs deposition amount and spatial distribution. The alteration of resistance caused by the Poisson effect of PAM/BiO 2-x composite hydrogel (H-BiO 2-x ) can be used as a piezoresistive sensor, and the piezoelectricity of BiO 2-x NSs can effectively enhance the density of transfer charge, thus improving the output performance of the H-BiO 2-x -based TENG. In addition, the chemical cross–linking between the BiO 2-x NSs and the PAM polymer chain allows the hydrogel electrode to have a higher tensile capacity (867%). Used for biomechanical motion signal detection, the sensors made of H-BiO 2-x have high sensitivity (gauge factor = 6.93) and can discriminate a range of forces (0.1–5.0 N) at low frequencies (0.5–2.0 Hz). Finally, the prepared TENG can collect biological energy and convert it into electricity. Consequently, the improved TENG shows a good application prospect as multimodal biomechanical sensors by combining piezoresistive, piezoelectric, and triboelectric effects.
研究领域:
材料科学
·
纳米技术
·
能量收集
·
传感器
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jing Wang,Tianyi Dai,Yuchen Zhou,Amel Mohamed,Guoliang Yuan,Hongbing Jia
Hydrogel-based wearable sensors have gained great interest on account of their huge application in human-machine interfaces, electronic skin, and healthcare monitoring. However, there are still challenges in designing hydrogel-based sensors with high stability in a wide temperature range, superior adhesion, and excellent sensitivity. Herein, sensors based on oxidized sodium alginate (OSA)/polyacrylamide (PAm)/polydopamine-Ti 3 C 2 T X (PMXene) /glycerol/water (Gly/H 2 O) organohydrogels were designed. The organohydrogels exhibited excellent mechanical properties (elongation at break of 1037%, tensile strength of 0.17 MPa), predominant self-healing ability (self-healing efficiency of 91%), as well as high sensing stability in a wide temperature range (from −20 to 60 °C). The introduction of PDA (polydopamine) and viscous glycerin (Gly) provide organohydrogels with superior adhesion. Organohydrogels sensors demonstrated high sensitivity (Gauge Factor, GF = 2.2) due to the combination of ionic and electron conduction. Sensors could stably detect human movement under different strain levels at high and low temperatures, providing a new solution for wearable sensors in extreme conditions.
研究领域:
材料科学
·
可穿戴技术
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生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Minerals
·
2023
·Vol. 13
·期 4
·582
·
IF 2.5
Bao Guo,Xinlei Zhan,Kaixi Jiang,Hongzhen Xie,Rongdong Deng
Sedimentation of ultrafine silica particles that exist in acid leaching pulp and their separation from Pregnant Leach Solution largely determines the efficiency of a hydrometallurgical process utilizing copper oxide ore. Thickener on a larger scale can allow longer sedimentation, generating low overflow turbidity but high economic input. In this paper, the flocculation behavior of quartz particles in sulfuric acid solution using nonionic flocculants polyethylene oxide (PEO) and polyacrylamide (PAM), as well as ionic cofactor montmorillonite (MMT) and nonionic cofactor tannic acid (TA), were investigated, with the dynamic size of flocs and counts of fines being monitored using an in situ particle size measurement technique, namely the focused beam reflectance measurement (FBRM), under turbulent conditions. Attention was paid to variables affecting quartz flocculation properties from both physicochemical and hydrodynamic aspects such as shear intensity. The flocculation mechanism was investigated using zeta potential and dynamic light scattering measurements. It was found that the TA promotes the bridging flocculation of PEO-quartz by forming associative complexes with larger clusters in solution, while MMT electrostatically adsorbs on the quartz surface, enhancing its bridging with PAM. Low turbidity benefited from the higher shear resistance of the compact flocs structure provided by PEO/PEO + TA/PAM + MMT. Efficient solid–liquid separation was achieved by using the synergistic flocculation of small molecule cofactors and polymer flocculants.Keywords:acid leaching;thickening;quartz;flocculation
研究领域:
湿法冶金
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材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2023
·Vol. 195
·期 11
·6537-6556
·
IF 3
Chen Xue-fang,Shen Zhi-jie,Ji Xu-ran,Yao Shi-miao,Wang Can,Li Hai-long,Zhang Hai-rong,Xiong Lian,Chen Xin-de
The efficient and economical removal of fermentation inhibitors from the complex system of biomass hydrolysate was one of the basics and keys in bio-chemical transformation. In this work, post-cross-linked hydrophilic-hydrophobic interpenetrating polymer networks (PMA/PS_pc IPNs and PAM/PS_pc IPNs) were proposed to remove fermentation inhibitors from sugarcane bagasse hydrolysate for the first time. PMA/PS_pc and PAM/PS_pc IPNs can obviously enhance the adsorption performance towards fermentation inhibitors due to their higher surface area and hydrophilic-hydrophobic synergetic surface properties, especially PMA/PS_pc IPNs has higher selectivity coefficients of 4.57, 4.63, 4.85, 16.0, 49.43, and 22.69, and higher adsorption capacity of 24.7 mg/g, 39.2 mg/g, 52.4 mg/g, 9.1 mg/g, 13.2 mg/g, and 144.9 mg/g towards formic acid, acetic acid, levulinic acid (LA), 5-hydroxymethylfurfural (HMF), furfural, and acid-soluble lignin (ASL), respectively, in a lower total sugar loss of 2.03%. The adsorption kinetics and isotherm of PMA/PS_pc IPNs were studied to elucidate its adsorption behavior towards fermentation inhibitors. In addition, the cyclic utilization property of PMA/PS_pc IPNs was stable. Synthesizing PMA/PS_pc IPNs is a new strategy to provide an efficient adsorbent for the removal of fermentation inhibitors from lignocellulosic hydrolysate.
研究领域:
生物化工
·
环境科学
·
高分子科学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2024
·
IF 15.8
Xiaobin Hui,Zhen Zhan,Zeyu Zhang,Jingya Yu,Pengyan Jiang,Zhengzheng Dang,Jian Wang,Songhua Cai,Yanming Wang,Zheng-Long Xu
Solid-state polymer electrolytes (SPEs) are promising for high-performance zinc metal batteries (ZMBs), but they encounter critical challenges of low ionic conductivity, limited Zn2+ transference number (tZn2+), and an unstable electrolyte-electrode interface. Here, we present an effective approach involving a missing-linker metallic organic framework (MOF)-catalyzed poly(ethylene glycol) diacrylate (PEGDA)/polyacrylamide (PAM) copolymer SPE for single Zn2+ conduction and seamless electrolyte-electrode contact. The single-Zn2+ conduction is facilitated by the anchoring of the OTF– anions onto the unsaturated metal sites of missing-linker MOF, while the PEGDA and PAM chains in competitive coordination with Zn2+ ions promote rapid Zn ion transport. Our all-solid-state electrolyte simultaneously achieves a superior ionic conductivity of 1.52 mS cm–1 and a high tZn2+ of 0.83 at room temperature, alongside uniform Zn metal deposition (1000 cycles in symmetric cells) and high Zn plating/striping efficiencies (>99% after 600 cycles in asymmetric cells). Applications of our SPE in Zn//VO2 full cells are further demonstrated with a long lifespan of 2000 cycles and an extremely low-capacity degradation rate of 0.012% per cycle. This work provides an effective strategy for using a missing-linker MOF to catalyze competitively coordinating copolymers for accelerating Zn2+ ion conduction, assisting the future design of all-solid-state ZMBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jingjing Yuan,Menghan He,Jueying Yang,Kang Li,Kexiang Fan,Hang Luo,Bo Li,Yu Chen
Femur fracture becomes increasingly common due to global population aging. Intramedullary nailing, a widely used treatment for fractures, tends to damage the blood vessels in the bone marrow cavity, which causes substantial hidden bleedings. The application of hydrogels to intramedullary nail hemostasis is limited by the challenges in balancing the adhesion, mechanical strength, and toughness. Inspired by the multi-network structure of snail mucus, which offers strong adhesion in harsh environments via adaptive wet-state contact followed by tight fitting upon dehydration, we developed a dual-network carboxymethyl chitosan (CMCS)-gluconic acid δ-lactone (GDL)-Ca 2+ /polyacrylamide (PAM) (CGC/P) hydrogel. The integration of GDL with CMCS introduces hydroxyl groups to enhance the adhesion of hydrogel and regulated system pH to facilitate the formation of the dynamic CMCS-GDL-Ca 2+ physical crosslinking network. The chemically crosslinked PAM network further improves the strength and toughness of the hydrogel. As the adhesion strength of the hydrogel can be increased by up to 50.14 times upon dehydration, a stretch-winding and dehydration method is developed to coat intramedullary nails with controllable thickness, effective hemostatic properties, excellent mechanical and adhesion characteristics. In rabbit femoral intramedullary nailing surgery, this system achieves rapid hemostasis and greatly promotes osteogenesis. Our study simultaneously improves the performance regulation contradiction of hydrogel coating, providing a crucial support to promote the application of hemostatic coatings to implantations.
研究领域:
生物医学工程
·
材料科学
·
组织工程
·
骨科
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 8
·3194-3204
·
IF 3.665
Hong-yan Niu,Li-qin Cao,Xu-le Yang,Kai-nan Liu,Lu Liu,Ji-de Wang
Here, the ZnO/polyacrylamide (ZnO/PAM) macroporous composite monolith was first prepared through the radical polymerization of acrylamide in ZnO-costabilized CO 2 -in-water Pickering high internal phase emulsions (HIPEs). An efficient and green synthesis method was used to prepare the ZnO/PAM porous precursor materials, and ZnO nanoparticles (NPs) were used as a metal ion source to grow the metal organic frameworks (MOF) phase through secondary recrystallization, thereby synthesizing the target MOF/PAM porous monolith. The effects of the contents of ZnO NPs on the formation of HIPEs and properties of the target MOF/PAM composites for the photocatalytic degradation of cationic dye were studied. As the content of ZnO NPs increased to 3.75 wt%, the composite monolith had high mechanical stress (0.24 MPa) at 80% strain and recovered their shape. The as-synthesized ZIF-8/PAM composites were characterized using X-ray diffraction, scanning electron microscope (SEM), Brunauer Emmett Teller (BET), energy dispersive X-ray spectrometer (EDS) mapping, and TG methods. SEM images showed that the hybrid materials were interconnected, and the sizes of the open macropore and interconnected pore throats were 30–125 and about 2–20 μm, respectively. In addition, the ZIF-8/PAM material could be used as a high-efficiency photocatalyst to remove the cationic dye at a fast rate (88.6%).
研究领域:
材料科学
·
化学
·
环境科学
✓ 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）