CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fan Zhang,Shanshan Jiang,Dezhen Zhao,Yunhe Diao,Xuying Liu,Jinzhou Chen,Jie Liu,Huige Yang
Hydrogels possess several advantageous characteristics, including transparency, biocompatibility, and ionic conductivity, making them promising for applications in flexible electronics, drug delivery, ionic skin, and electrolytes. Nevertheless, creating a robust conductive and antifreezing hydrogel with enduring environmental stability remains a significant challenge. This study, based on the salt-out effect of alkali metal ion salts and binary solvent systems, employs a straightforward one-pot solvent exchange method to introduce dynamic and reversible non-covalent bonds (hydrophobic association and hydrogen bonds) into a polyacrylamide-sodium alginate (PAM-SA) dual-network hydrogel with excellent flexibility and biocompatibility. By adjusting the types of ions and cryoprotective agents (CPA), a series of ion-conductive organic hydrogels with anti-freezing properties were successfully prepared. The resulting PAM/SA-Gly-KCl 1M hydrogel exhibits commendable mechanical properties (with a tensile strain of up to 1465 %, a tensile strength of 166 kPa, and toughness of 1354 kJ m 3 ), high ionic conductivity (0.59 S/m), outstanding frost resistance (–100 °C), and sustained long-term stability (maintaining 70 % of its weight for over one month in an open environment). Therefore, sensors based on organic hydrogels exhibit exceptional characteristics, including high strength, superior transparency, and dependable operation in low-temperature conditions. Its remarkable sensing sensitivity and stability and antifreeze properties facilitate operation across an extensive temperature range and contribute to an extended operational lifespan. Overall, this sensor proves conducive to developing enduring flexible electronic products in challenging environments, thereby unveiling novel prospects for the realms of smart wearable technology and health monitoring.
研究领域:
材料科学
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化学工程
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生物医学工程
·
电子学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Anni Fu,Ziyang Qiu,Qiuxun Liu,Ye Chen,Yuxuan Hu,Ximei Liu
Solar-driven interfacial evaporation holds great promise for clean water production, particularly in seawater desalination and wastewater purification. However, the limited evaporation performance of evaporators and their incapability to degrade organic contaminants hinder their practical applications. Here, we develop a bifunctional frustum-array solar-driven evaporator with high efficiency in both seawater desalination and photocatalytic dye degradation. Our evaporator, designated as FATPE, is fabricated via a template-assisting method with Ti 3 O 5 /PVA/PAM hydrogels to create a frustum-array structure. Under 1 sun irradiance (1 kW m -2 ), FATPE achieves an exceptional evaporation rate of 4.34 kg m -2 h -1 , energy efficiency of 95.90%FATPE, as well as excellent desalination capability with a salt rejection rate exceeding 99.90% in simulated seawater with varying salinities. Furthermore, FATPE can realize efficient photocatalytic degradation of varying organic pollutants, exemplified with a methylene blue (MB) degradation rate of 85.37%. This work realizes the dual functional synergy of high-efficiency water purification and photocatalytic dye degradation, offering a promising strategy for producing clean water from seawater and dye-contaminated wastewater in coastal regions.
研究领域:
环境科学技术
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材料科学
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太阳能利用
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水净化
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光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2018
·Vol. 33
·期 3
·559-565
·
IF 0.524
Guo Huiling,Sun Honghao,Su Zhengding,Hu Shuchao,Wang Xiaotao
A facile approach has been developed to synthesize Fe 3 O 4 @PAM (polyacrylamide) nanoparticles (NPs) with carboxyl groups on the surfaces by copolymerization with acrylamide and acrylic acid in Fe 3 O 4 NPs aqueous suspension. Nitrilotriacetic acid (NTA) was conjugated to the magnetic NPs via well-known carboniimide chemistry using EDC and NHS. The Ni 2+ ions loaded on the surface of NPs provide abundant docking sites for immobilization of His-tagged green fluorescent proteins (His-tagged GFP). The high magnetic property of Fe 3 O 4 @PAM@NTA-Ni 2+ allows an easy separation of the NPs from solution under an external magnetic field, with high His-tagged protein binding capacity (42 μg protein/mg of NPs). The NPs can be recycled for at least four times without significant loss of binding capacity to proteins. These materials show great potential to separate His-tagged protein with low-cost purification at industrial scale.
研究领域:
材料科学
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生物化学
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生物技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Qiang He,Yongjuan Wang,Yuming Zhou,Man He,Ran Xu,Saichun Hu,Wenting Wu,Ruili Wang
Passively responsive thermochromic smart window, which can modulate indoor incident solar light automatically at relatively high outdoor temperature, is a practical energy-saving device for construction and automotive industries. In this paper, a thermochromic composite hydrogel film based on W-doped vanadium dioxide (W-VO 2 ), poly N-isopropyl acrylamide (PNIPAM) and polyacrylamide (PAM) is presented and this hydrogel film was prepared between two quartz substrates to form the sandwich structured smart window. In this thermochromic system, 2 wt% monoclinic W-VO 2 were dispersed in the hydrogel film with the thickness of 0.1 mm. The introduction of PAM changes the flow-state PNIPAM microgel to hydrogel, which dramatically improved the practicality of the PNIPAM-based smart window. When the outdoor temperature is higher than 40 °C, the solar modulation capacity of this passive smart window, with a high luminous transmittance of 72% at 25 °C, can reach 46.3%. The smart window possesses high solar modulation ability and more than 20% luminous transmittance even after 40 times high temperature durability tests.
研究领域:
材料科学
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能源效率
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智能材料
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Jintao Liang,Kaiteng Yan,Yutong Liu,Xiaoqing Yao,Fei Guo,Wen Xue,Guiyin Li,Jiejing Chen,Zhide Zhou
1,5-anhydroglucitol (1,5-AG) is an important indicator in the early detection of diabetes. In this study, a high-performance light addressable potentiometric sensor (LAPS) for the detection of 1,5-AG based on reduced graphene oxide-polyacrylamide-ferrocene/gold nanoparticles (rGO-PAM-Fc/AuNPs) as sensing membrane and pyranose oxidase (PROD) as the specific recognition substance was constructed. Among them, rGO-PAM-Fc/AuNPs modification LAPS chip can not only effectively increase the specific surface area and adsorb more PROD , but also enhance the capacitive effect of LAPS and improve the detection sensitivity. 1,5-AG is hydrolyzed by PROD and produces hydrogen peroxide (H 2 O 2 ) that can oxidize divalent ferrocene ions in the rGO-PAM-Fc composite to trivalent ferrocene ions, therefore leads to a change in the membrane potential on the surface of the LAPS chip and causes a shift in the I-V curve, which reflect the change of 1,5-AG concentration. The designed LAPS had a good linearity with 1,5-AG concentration in the range of 100.0–1000.0 μg/mL with a correlation coefficient of 0.99068. The sensitivity was calculated to be 0.1908 mV/μg/mL and a limit of detection (LOD) of 21.74 μg/mL was obtained using three signal-to-noise ratio (S/N = 3). Also, the 1,5-AG biosensor has good specificity, reproducibility and stability, and can be used in human serum samples with the recoveries of 93.62 %–114.52 %. This work provides a highly sensitive, portable and low-cost assay for the detection of 1,5-AG. Prime novelty statement Herein, a high-performance light addressable potentiometric sensor (LAPS) for the detection of 1,5-AG based on reduced graphene oxide-polyacrylamide-ferrocene/gold nanoparticles (rGO-PAM-Fc/AuNPs) as sensing membrane and pyranose oxidase (PROD) as the specific recognition substance was constructed. Among them, rGO-PAM-Fc/AuNPs modification LAPS chip can not only effectively increase the specific surface area and adsorb more PROD, but also enhance the capacitive effect of LAPS and improve the detection sensitivity. 1,5-AG is hydrolyzed by PROD and produces hydrogen peroxide (H 2 O 2 ) that can oxidize divalent ferrocene ions in the rGO-PAM-Fc composite to trivalent ferrocene ions, therefore leads to a change in the membrane potential on the surface of the LAPS chip and causes a shift in the I-V curve, which reflect the change of 1,5-AG concentration. The designed LAPS had a good linearity with 1,5-AG concentration in the range of 100.0–1000.0 μg/mL with a correlation coefficient of 0.99068. The sensitivity was calculated to be 0.1908 mV/μg/mL and a limit of detection (LOD) of 21.74 μg/mL was obtained using three signal-to-noise ratio (S/N = 3). Also, the 1,5-AG biosensor has good specificity, reproducibility and stability, and can be used in human serum samples with the recoveries of 93.62 %–114.52 %. This work provides a highly sensitive, portable and low-cost assay for the detection of 1,5-AG.
研究领域:
生物传感
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纳米技术
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分析化学
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糖尿病检测
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Qiang Huang,Jiao Zhao,Meiying Liu,Yan Li,Jiayuan Ruan,Qing Li,Jianwen Tian,Xiaoli Zhu,Xiaoyong Zhang,Yen Wei
In present work, novel polyacrylamide immobilized molybdenum disulfide (MoS 2 @ [email protected] ) composites were synthesized via the mussel-inspired chemistry and surface initiated atom transfer radical polymerization (SI-ATRP). The as-prepared MoS 2 @ [email protected] composites were characterized by energy dispersive X-ray spectroscopy (EDX), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). Characterization results provide sufficient evidences for the successful functionalization of MoS 2 with PAM. The products were used as adsorbents for removing of copper (II) ions. Results show the introduction of PAM onto MoS 2 could enhance the adsorption capacity of MoS 2 @ [email protected] towards copper (II) ions. The amount of adsorbed copper (II) ions by MoS 2 @ [email protected] composites is 2.5 times that of pristine MoS 2 . The effects of various experimental factors on the adsorption process, including contact time, initial copper (II) ion concentrations, solution pH and temperature, were also studied in this work. The batch experiments show that the adsorption of copper (II) ions onto MoS 2 @ [email protected] is dependent on time, pH and temperature. The optimum solution pH is observed at pH 7 and the increase of temperature is favorable for the adsorption of MoS 2 @ [email protected] towards copper (II). Based on the experiment data, the adsorption kinetics, isotherms and thermodynamics were also investigated. The kinetics and isotherm studies show that pseudo-second-order kinetic and Freundlich isotherm models could well fit with the adsorption data. The thermodynamic results show that the adsorption of copper (II) ions on MoS 2 @ [email protected] is a spontaneous and endothermic process. The adsorption process is mainly governed by the chemisorption involving the electrostatic interaction and/or chemical chelation between copper (II) ions and amino groups on the surface of MoS 2 @ [email protected] Taken together, it is proven that the PAM can be immobilized onto the MoS 2 nanosheets via the mussel-inspired chemistry and SI-ATRP, and it can enhance the adsorption performance of MoS 2 @ [email protected] composites, which might be used as adsorbents to remove heavy metal ions in real environment treatment.
研究领域:
材料科学
·
环境化学
·
聚合物化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Kang Li,Yutong Wen,Yuanyuan Song,Na Qi,Ying Li
Facing the increasingly serious water pollution problem, photocatalytic method has been recognized as one of the best solutions due to its convenience, efficiency and low consumption. Graphitic carbon nitride (g-C 3 N 4 ), a metal-free and visible light-responsive photocatalyst , has shown great potential in the photocatalytic treatment of water pollution. This study describes a novel bottom-up strategy for constructing visible light-responsive photoactive nanocomposite g-C 3 N 4 /CNC/PAM aerogel with the g-C 3 N 4 uniformly loaded throughout a polymeric network, perfect mechanical property and high performance in treating wastewater containing organic/heavy metal compound contaminants. Aldehyde-modified negatively charged natural nanoparticle cellulose nanocrystal (CNC-CHO) was used to achieve uniform dispersion of g-C 3 N 4 , and also participate in the subsequent formation of aerogel through chemical crosslinking with photoinitiated polyacrylamide (PAM) catalyzed by g-C 3 N 4 without additional crosslinkers. The optimized porous structure of the prepared aerogel ensured high swelling rate of up to 2500%, excellent pollutant adsorption performance and high light transmittance , thus achieved high removal rate and removal efficiency for different types of pollutants including organic dyes (RhB, MB and CR) and heavy metal Cr(VI). The removal efficiency could get 99% for RhB (5 mg/L) in 6 h, and 95% for Cr (VI) (10 mg/L) in 100 min under visible light . Further more, the aerogel showed excellent mechanical stability and reusability, with no loss in activity observed after over 5 cycles of dye degradation .
研究领域:
环境科学
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材料科学
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化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 63
·期 12
·4098-4106
·
IF 3.2
Fan Chen,Jie Ren,Xu Xiang
Hydrogels are widely used in the field of biomedicine because of their excellent biocompatibility. In most cases, the pH range applicable to drugs is limited, so it is meaningful to study the diffusion of protons in hydrogels. In this work, the diffusion rate of protons in hydrogels was monitored by a self-made device, and the factors affecting the diffusion rate of protons were studied. The self-made device consists of a supply chamber and a receiving chamber with a piece of hydrogel sandwiching between them. It was found that the thickness of hydrogel had a great influence on proton diffusion. The thicker the hydrogel is, the slower the proton diffusion rate is. At the same time, the diffusion coefficient of protons in PAM hydrogel was calculated to be 1.28 ± 0.09 × 10 −5 cm 2 /s (HCl, 25°C). The diffusion coefficient is a function of temperature, and its value increases with the increase in temperature. The effect of the solid content of hydrogel on proton diffusion was also considered, but in the range of solid content 1.81%–10.07%, the proton diffusion rate was almost unaffected. Moreover, anions also have a decisive effect on proton diffusion, with smaller anions leading to faster proton diffusion in the hydrogel.
研究领域:
生物医学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yuhe Wei,Xiaoping Sun,Yanfen Sun,Juan Yuan,Haoqiu Chen,Lianxin Luo
Self-powered flexible electronic devices are being rapidly developed rapidly for the field of sensing and motion monitoring, posing greater challenges to friction electrical materials. Triboelectric hydrogels must be enhanced in terms of their electrical conductivity and mechanical strength to address the poor stability, low sensitivity, and susceptibility to unpredictable physical damage of conventional hydrogels. In this study, multinetwork polyacrylamide (PAM)-agar (AG)/nanofibrillar cellulose (CNF)-MXene triboelectric hydrogels with homogeneous structures were prepared. By adopting AG and CNF as "sacrificial bonding" modes and utilizing the high conductivity of MXene , triboelectric hydrogels were found to have good electrical conductivity, high tensile properties , high tensile strength , and high sensitivity. Single-electrode triboelectric nanogenerators made of triboelectric hydrogels were used as self-powered wearable sensors for accurately detecting the amplitude of movement in different parts of the human body during exercise. The results obtained in this study have positive implications for promoting the design of high-performance hydrogel materials and their application in flexible wearable sensors.
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
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chunni Zhang,Hao Zhao,Ting Zhou,Baishan Guo,Shinan Huang,Jingyu Cai,Linxi Hou
The development of dual-functional composite materials that integrate efficient electromagnetic wave (EMW) absorption and thermal conductivity is a crucial advancement in addressing the issues of electromagnetic pollution and heat accumulation in electronic devices. In this work, Ni x Co y -C/PAM hydrogels derived from mixed metal MOF-74 were successfully fabricated by in situ radical polymerization with the assistance of an external magnetic field. The properties of Ni x Co y -C/PAM were optimized by varying the ratios of cobalt and nickel metals as well as their oxides, thereby providing opportunities for the creation of advanced electromagnetic wave absorbers. When the Ni/Co ratio was increased to 1:1, Ni 1 Co 1 -C/PAM demonstrated superior EMW absorption performance at a filler ratio of 3 wt%. This configuration exhibited a minimum reflection loss of −57.8 dB at 8.64 GHz with a thickness of 3.6 mm, alongside an effective absorption bandwidth extending up to 5.81 GHz with a thickness of 2.3 mm. Furthermore, magnetic orientation within the filler facilitated enhanced heat transfer by establishing high-efficiency thermal conductive pathways. This study offers valuable insights into designing polymer composites characterized by improved thermal conductivity and robust EMW absorption capabilities.
研究领域:
材料科学
·
电磁学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2022
·Vol. 7
·期 43
·e202202905
·
IF 2.307
Yazhen Wang,Qing Yang,Liwu Zu,Shaobo Dong,Tianyu Lan
Graphical In this work, we successfully prepared PAM-b-DOPOAA block copolymers using the ATRP method. The analysis showed that the ATRP method can regulate the chain segment length and ratio of the resulting polymer with a narrow molecular weight distribution. The prepared block copolymers can be used as a good flame retardant antistatic agent. Polyacrylamide has been a hot topic of research in recent years, however, the preparation of block copolymers of polyacrylamide using ATRP method has been little studied. In this paper, polyacrylamide with reactive group bromine (PAM−Br) was synthesized by atom transfer radical polymerization (ATRP) using acrylamide (AM) as the monomer and water as the solvent, and polyacrylamide was used as the macromolecular initiator for the next reaction step. Then 9,10-dihydro-9-oxa-10-phosphafi-10-oxide (DOPO) was organically modified to obtain acrylate monomers with DOPO functional groups (DOPOAA), and a mixture of water and N, N-dimethylformamide (DMF) was used as the solvent to obtain PAM-b-DOPOAA block copolymers with controllable molecular mass and narrow molecular mass distribution. The effects of the molecular mass of the macromolecular initiator, polymerization time, and the molar ratio of catalyst to the ligand on the polymerization process were investigated. The structure and properties of the products were also characterized by 1 H-NMR, FTIR, XPS, DSC, TG, etc. The PAM-b-DOPOAA prepared by ATRP method can artificially design the length and ratio of the two chain segments, realizing one additive with two functions and the permanent existence of the function of polymer additives.
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
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jingliu Wang,Yue Wu,Kewei Zhao,Gaozheng Liu,Rongyan Wang,Yanyan Zhao,Yong Liu,Yaqing Ge,Xubao Jiang,Xiangling Gu
Poly(N-isopropylacrylamide) (PNIPAM)-based hydrogels are widely used in the preparation of Janus actuators due to their remarkable temperature-responsive properties. However, preparing PNIPAM-based hydrogel actuators with excellent mechanical properties, mass transfer ability, and programmable deformation, as well as gaining a profound and systematic understanding of their driving mechanisms, remains a challenge to date. To address these challenges, an efficient PNIPAM-hydroxypropylmethyl cellulose/polyacrylamide-Graphene oxide (PNIPAM-HPMC/PAM-GO) Janus hydrogel actuator with strong interfacial stability was constructed based on the self-generation method; PNIPAM-HPMC was used as the active layer, and PAM-GO was used as the passive layer. The introduction of HPMC makes the active layer have excellent tensile strength (7.55–28.3 kPa) and mass transfer ability (39.07–73.03%), thereby improving the deformation ability of the actuator (239–360°). It can still achieve a 360° deformation after being actuated repeatedly 5 times. The deformation dynamics of the Janus hydrogel actuator under thermal response conditions were quantitatively analyzed by real-time tracking of the response behavior, and the important role of mechanical moduli in the deformation process of the Janus hydrogel actuator was revealed for the first time. Therein, the effect of the elastic modulus difference on the deformation of the actuator is 48 times that of the compression modulus difference. Finally, the Janus hydrogel actuator with high interface stability, mechanical robustness, time-programmable, and double-layer integration prepared in this work shows potential application in the fields of bionics, intelligent switches, and display systems.
研究领域:
材料科学
·
生物工程
·
智能材料
✓ 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）