JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Jin Wang,Xianghu Yu,Cui Wang,Kechuang Xiang,Mengde Deng,Huabing Yin
PAMPS/MMT composite electrolytes with high ionic conductivities were prepared by solution-casting method. The influences of Na-MMT contents on the ionic conductivities and mechanical properties of PAMPS hydrogel electrolyte were characterized and the electrochemical properties of supercapacitor with PAMPS/MMT composite electrolytes were investigated. The addition of Na-MMT can increase the ionic conductivities, tensile strength of PAMPS. PAMPS/MMT composite electrolyte has the superior integrated performance of ionic conductivities and tensile strength when the mass fraction of Na-MMT is about 5–7%, the ionic conductivity is 5.91 × 10 −2 S cm −1 and the tensile strength is 8.9 MPa. The capacitor exhibits ideal behavior for the electronic double-layer capacitance. The specific capacitance and the cycling stability of PAMPS/MMT composite electrolytes are enhanced in comparison with that of PAMPS. Thus it provides a promising composite polyelectrolyte for supercapacitor .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 13
·7619-7627
·
IF 3.119
Chunmei Xiao,Jianming Lin
The existence of Pb(II) ions in water systems poses significant potential hazards to public health and the environment. In the present study, poly(2-acrylamido-2-methylpropanesulfonic acid) (PAMPS) brush-modified Ni3Si2O5(OH)4 nanotubes were prepared, and their adsorption efficiency against the Pb(II) ions was investigated. The characterization results of FTIR spectroscopy, TGA, TEM, and XPS indicated the successful grafting of PAMPS on the surface of free Ni3Si2O5(OH)4 NTs, and the prepared PAMPS-g-Ni3Si2O5(OH)4 NTs exhibited a 6–8 nm grafting layer, which could provide abundant binding sites for metal adsorption. During the Pb(II) removal process, a pH-dependent adsorption behavior was observed, and the adsorption processes fitted well with the pseudo-second-order kinetic model and the Langmuir isotherm model. Compared with unmodified Ni3Si2O5(OH)4, the PAMPS-g-Ni3Si2O5(OH)4 NTs exhibited obviously faster adsorption of Pb(II) and higher equilibrium adsorption capacity for the removal of Pb(II). The maximum adsorption capacity calculated via the Langmuir isotherm model was 0.653 mmol g−1 (135.3 mg g−1) at 298 K. In a metal coexisting system, the total adsorption capacity of the NTs was increased; this indicated the potential of the proposed NTs in the removal of Pb(II) from metal coexisting wastewater. This study showed the significant potential of PAMPS-g-Ni3Si2O5(OH)4 NTs in the effective removal of Pb(II).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2021
·
IF 3.189
Wei Li,Lanjuan Wu,Zhengqiao Zhang,Huizhen Ke,Qian Liu,Zhifeng Zhu,Zhenzhen Xu,Anfang Wei,Xuedong Cheng
The objective of this work was to examine the influence of poly (2-acryloylamino-2-methyl-1-propanesulfonic acid) (PAMPS) branches grafted onto starch molecules upon viscosity stability, adhesion and desizability of corn starch for warp sizing. A series of starch- g -PAMPS samples with different grafting ratios were prepared by graft copolymerization of acid-converted starch (ACS) with different amounts of 2-acryloylamino-2-methyl-1-propanesulfonic acid (AMPS), respectively, in an aqueous medium . The influence of the grafted PAMPS branches on the adhesion of starch to cotton and viscose fibers was evaluated by measuring the bonding forces of slightly sized cotton and viscose roving and comparing the adhesion of starch- g -PAMPS samples with that of ACS, according to a legal method (FZ/T 15001–2008). Their influences on viscosity stability and desizability were also evaluated. The desizability was investigated by measuring the time required for breakage of the film in hot water. It was found that starch- g -PAMPS samples were superior to ACS in adhesion to both fibers, viscosity stability and desizability, indicating that the PAMPS branches introduced were able to improve adhesion to the fibers, viscosity stability and desizability of starch. With the rise in grafting ratio, gradually improved bonding forces to both fibers, paste stability and desizability were exhibited. Starch- g -PAMPS showed potential for use as a new starch-based size in the warp sizing of cotton and viscose.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
·
IF 2.7
Yanling Yang,Yining Shi,Yue Shi
Smart windows with adjustable optical properties for energy-saving applications have received increasing attention. In this study, an anisotropic single-domain structure is successfully prepared by shearing-oriented hydroxypropyl cellulose (HPC) in poly(2-acrylamido-2-methylpropanesulfonic acid) (PAMPS) hydrogel network. This composite hydrogel can respond to ambient temperature and solar radiation in the visible and near-infrared light regions for smart window applications. By precisely controlling the component of the composite hydrogel, the cloud point temperature ( T cp ) of the smart window can be significantly tuned from a very high value to below the comfortable temperature for the human body. For example, with 10 wt.% PAMPS and 42 wt.% HPC, the crosslinking hydrogel demonstrates a stable single-domain structure and relatively low T cp . With the addition of NaCl, T cp can be further reduced to even below the human comfort temperature. The oriented composite hydrogel showed excellent durability, flexibility, and thermal radiation shielding under the sunlight simulator with tunable T cp . These properties make the HPC/PAMPS composite hydrogel have a broad application prospect in the realm of energy-efficient building smart windows and effectively improve the comfort of indoor environments with different demands.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jin Wang,Hucheng Chen,Yahui Xiao,Xianghu Yu,Xiaoxuan Li
Polyelectrolyte hydrogels have great potential as gel-polymer electrolytes (GPE) because of their low-cost and environmental benefits. Here a polyelectrolyte hydrogel of high ionic conductivities and mechanical properties was developed via the formation of semi-interpenetrating polymer network (s-IPN) GPE, which consists of Poly (2-acrylamide-2-methyl propane sulfonic acid) (PAMPS), poly(vinyl alcohol) (PVA) and sodium montmorillonite(MMT). The additions of MMT and PVA can both increase the ionic conductivities and the tensile strength of PAMPS. PAMPS/PVA/MMT s-IPN GPE show excellent overall performance of ionic conductivity of 6.4×10 -2 S cm -1 and tensile strength of 24.3 MPa when the ratio of PVA/AMPS is at 0.8:1 and MMT is at 7wt%. When PAMPS/PVA/MMT s-IPN is used as a GPE in supercapacitors, it exhibits good electrolyte behavior with its specific capacitance of 208 F g -1 , close to that of using 4M KOH aqueous solution electrolyte.
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
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Yasen Li,Cheng Zhang,Tingzhong Li,Guoxing Sun
This study investigates the impact of the chemical composition of superabsorbent polymers (SAPs) on their effectiveness in internal curing within high-performance cementitious materials. Although the use of commercial SAPs in cementitious systems has been widely researched, there is still no consensus on how different SAP structures influence material properties. For the first time, this research employs photoinitiated free radical polymerization technology to synthesize three structurally distinct SAPs: SAP with sulfonic acid groups (PAMPS), SAP with amide groups (PAM), and SAP with carboxyl groups (PAAs). The effects of these SAPs on the cement hydration process and microstructure were examined by analyzing their water absorption behavior in cement filtrate. The residual cation content on the SAP surface was evaluated using EDS, while XRD and TGA were used to study how SAP structure affects cement hydration products. Furthermore, the impact of these SAPs on the strength and autogenous shrinkage of the material was investigated. The results indicate that PAMPS, with its sulfonic acid groups, exhibited stable water absorption performance in the alkaline cement environment, promoting hydration reactions and increasing the formation of needle-shaped C-S-H. This stability contributed to mitigating the negative effects on mechanical properties. While the inclusion of SAPs generally reduced the strength of the cement matrix, PAMPS was the most effective in mitigating autogenous shrinkage, achieving a shrinkage mitigation efficiency of 86 %. These findings highlight the importance of SAP chemical structure in influencing cement hydration and material performance, offering insights for the development of effective internal curing agents to enhance high-performance concrete.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENGINEERING FRACTURE MECHANICS
·
2017
·
IF 2.151
Wenlei Zhang,Xiao Liu,Jikun Wang,Jingda Tang,Jian Hu,Tongqing Lu,Zhigang Suo
The discovery of tough hydrogels of many chemical compositions, and their emerging applications in medicine, clothing, and engineering, has raised a fundamental question: How do hydrogels behave under many cycles of stretch? This paper initiates the study of the fatigue behavior of the classic PAMPS/PAAM double network hydrogels discovered by Gong and her co-workers [25]. We reproduce the hydrogels, and prepare samples of two types, with or without a crack cut before the test. When an uncut sample is subject to cyclic stretches, internal damage accumulates over thousands of cycles until a steady state is reached. When a cut sample is subject to cyclic stretches, the crack extends cycle by cycle if the amplitude of stretch is above a certain value. A threshold of energy release rate exists, below which the crack remains stationary as the sample is cycled. We find a threshold around 400 J/m 2 for hydrogels containing PAAM networks of a low density of crosslinkers, and around 200 J/m 2 for hydrogels containing PAAM networks of a high density of crosslinkers. The experimental findings are compared to the Lake-Thomas model adapted to the double-network hydrogels.
研究领域:
材料科学
·
机械工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOACTIVE AND COMPATIBLE POLYMERS
·
2026
·
IF 1.9
Mohammad Javan Almasi,Chenyang Gong,Abdelsalam Abdelhussein,Dangsheng Xiong
This study reports novel biomimetic polyvinyl alcohol (PVA) hydrogels modified with poly (2-acrylamido-2-ethylpropanesulfonic acid; PAMPS), mica and multi-walled carboxylated carbon nanotubes (CNTCOOH) and evaluates how filler identity and microstructure control functional properties for cartilage like applications. Spectroscopy and elemental mapping confirmed the presence and chemical integrity of all additives. Electron microscopy showed an interconnected porous network whose pore size increases with PAMPS, decreases with mica, and enlarges with CNTCOOH. Combining mica with CNTCOOH produced a denser network that strengthened the material but reduced fluid uptake. Measured water content (WC) ranged from 88.0% to 93.2%. The CNTCOOH rich composition swelled fastest and reached an equilibrium swelling ratio (SR) near 1692%, while the dual filler composition displayed limited swelling. Mechanical testing showed that the dual filler composition achieved the highest tensile strength (TS) of 0.55 MPa and the greatest elongation at break of 165% and also exhibited the highest compressive stiffness under large strain. In contrast, porous CNT rich samples absorbed fluid rapidly but had lower TS. Friction testing under joint like conditions identified hydration lubrication as the main low friction mechanism and the using both filler enriched samples produced the low coefficient of friction (COF) near 0.066. Wear tests after extended cycling revealed low average wear depths for the dual filler hydrogel and only minor surface flattening without cracking or delamination. Together these results demonstrate that deliberate choice and combination of fillers allow predictable tuning of swelling behavior, lubrication and mechanical resilience to meet different biomedical needs.
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Sili Zhou,Wenbo Zhang,Wenhui Yuan,Xuenong Gao,Ziye Ling,Xiaoming Fang
Thermal energy storage technology based on phase change materials (PCMs) can address the temporal and spatial mismatches in solar thermal energy conversion, thereby enhancing solar energy utilization efficiency. However, the liquid flow and poor thermal reliability of PCMs limit their large-scale application in solar thermal systems. In this study, we employ a simple “one-pot method” to prepare a form-stable and thermally reliable oxalic acid dihydrate-glutaric acid/poly 2-Acrylamido-2-methyl-1-propanesulfonic acid (OAD-GA/PAMPS) phase change gel. The OAD-GA/PAMPS phase change gel melts at 64.5 °C with a phase change enthalpy of 193.6 kJ/kg, the tensile strength is 7.707 MPa, and the compressive strength is 16.940 MPa. By incorporating 5 wt% BN particles, the thermal conductivity of OAD-GA/PAMPS phase change gel reaches 0.63 W/(m·K). After 200 heating-cooling cycles, the phase change temperature of the OAD-GA/PAMPS phase change gel remains nearly unchanged, and the phase change enthalpy decreases by only 5.7 %. The photo-thermal conversion efficiency of the OAD-GA/PAMPS phase change gel is 82.7 %. The high thermal reliability and photo-thermal conversion efficiency of the OAD-GA/PAMPS phase change gel makes it suitable for solar thermal energy storage applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Chengcheng Yang,Hongshan Guo,Huajun Sun,Nan Xiang,Chuanxing Wang
Phase change materials could store and release heat energy through phase change. However, the shortcomings of low thermal conductivity in the photothermal conversion process and easy leakage in the solid-liquid conversion seriously hinder the application of heat energy utilization. Graphene had high thermal conductivity , and it was an ideal material for improving the solar absorption, solar energy conversion and thermal conductivity of phase change materials. In this paper, a graphene aerogel composed of copper nanowires (CuNWs)/2-acrylamide-2-methylpropanesulfonic acid (AMPS) was designed. The thermal conductivity and shape stability of phase change materials for solar-thermal-electrical conversion applications were enhanced by composite CuNWs. Furthermore, PAMPS was coated on the surface of copper nanowires to avoid the oxidation of copper nanowires, and the sulfonic acid group of PAMPS was used to induce CuNWs to disperse uniformLy on the graphene sheets, which further constructed a good conductive network. After vacuum impregnation of PW , the best thermal conductivity phase change composite (PW-CuNWs@PAMPS-GA (1:1) ) was obtained. The PCC loaded with CuNWs with the same graphene content achieved a thermal conductivity of 1.46 W/(m·K) and a high latent heat of 206.8 J/g. The latent heat retention rate was as high as 99.57 %. The photothermal conversion efficiency of PW-CuNWs@PAMPS-GA (1:1) was remarkable at 96.4 %. Due to its excellent solar-thermal-electrical conversion efficiency, the output voltage and output current were 800.8 mV and 85.8 mA, respectively, at a solar analog intensity of 5 kW/m 2 . Even after the sunlight was stopped, the voltage output could be maintained for a while by releasing the heat energy stored in the phase change composite.
研究领域:
材料科学
·
能源工程
·
太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
·
2021
·
IF 3.636
Feng-Ying Gao,Xin Zhou,Mai-Xin Lu,Miao Wang,Zhi-Gang Liu,Jian-Meng Cao,Xiao-Li Ke,Meng-Meng Yi,Deng-Gao Qiu
Toll-like receptors (TLRs) play a critical role in the innate immune response of fish. In this study, we isolated the cDNA sequence of Nile tilapia TLR1 ( On TLR1). The deduced OnTLR1 protein contains a signal peptide , 7 leucine-rich repeats (LRRs), a C-terminal LRR (LRR-CT), a transmembrane region and a highly conserved TIR domain. In healthy Nile tilapia, the On TLR1 transcript was broadly expressed in all examined tissues, with the highest expression levels in the spleen . After infection with Streptococcus agalactiae , the On TLR1 transcripts were upregulated in the gill and kidney. After stimulation with polyinosinic-polycytidylic acid (poly(I:C)), the expression levels of On TLR1 were significantly downregulated in the intestine , whereas On TLR1 transcripts were significantly upregulated in the kidney. After challenge with lipopolysaccharide (LPS), the expression levels of On TLR1 were significantly upregulated in the spleen and kidney. The subcellular localization showed that On TLR1 was expressed in the cytoplasm. TLR1 significantly increased MyD88-dependent NF-κB activity. However, the results of a pull-down assay showed that On TLR1 did not interact with MyD88 or TIRAP. Binding assays revealed the specificity of OnTLR1 for pathogen-associated molecular patterns (PAMPs) and bacteria that included S. agalactiae , Aeromonas hydrophila and poly(I:C) and LPS. Taken together, these findings suggest that OnTLR1, as a pattern recognition receptor (PRR), might play an important role in the immune response to pathogen invasion.
研究领域:
免疫学
·
分子生物学
·
鱼类生物学
·
病原识别
✓ 已验证
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Laifeng Lu,Lifeng Ji,Ruixi Shi,Shuhua Li,Xi Zhang,Qingbin Guo,Changlu Wang,Liping Qiao
Alpha-1,3-glucan is often synthesized on the surface of pathogenic filamentous fungi cell walls to block pathogen-associated molecular patterns (PAMPs) generation by host plant enzymes and the subsequent immune system response of the plant. Here, Botrytis cinerea susceptibility was assessed in tomato fruit to determine whether the fruit could recognize this camouflage and mount an immune response to it. The results showed that local mechanical wounds treated with dextran and laminarin, except amylopectin, could locally and then systemically activate disease resistance against B. cinerea infection in tomato fruit. Dextran treatment effectively elicited fruit callose deposition and phenylpropanoid and flavonoid biosynthesis to a greater extent than α-glucanase activity relative to the mock group surface wounds. Enzymatic hydrolysis of this polysaccharide provided some help in improving host disease resistance. Taken together, these results demonstrate that tomato fruit can perceive α-1,3-glucan as a kind of PAMPs but have limited ability to degrade it.
研究领域:
植物病理学
·
植物生理学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）