JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2024
·
IF 4.7
Liu Peng,Bi Yuanyuan,Gu Yaxin,Li Xiangyu,Mao Junpeng,Shan Xiantong,Cao Ji
In this study, a novel hydrogel nanofiltration (NF) membrane is developed through the coating-crosslinking method by synergistically utilizing multi-walled carbon nanotubes (MWCNTs) and titanium dioxide (TiO 2 ) into the hydrogel coatings of sodium alginate (SA) and polyvinyl alcohol (PVA) on a porous polyvinylidene fluoride (PVDF) matrix membrane. The experimental findings demonstrate that the P-MT@SA-PVA-PVDF hydrogel NF membrane displays outstanding separation performance, hydrophilicity, and antifouling properties. When the ratio of MWCNTs to PVP is kept at 1:4, the pure water flux of the prepared hydrogel NF membrane reaches 226.2 L/(m 2 ˑh). The rejection rates for Coomassie brilliant blue, Congo red, and Methylene blue are 96.3%, 95.8%, and 92.1%, respectively. Moreover, the total fouling rate of the membrane is merely 28.7%, and the flux recovery rate can attain 93.1%. The remarkable hydrophilicity and highly efficient rejection rates for dyes indicate broad application prospects of MWCNTs-modified hydrogel NF membranes in the field of printing and dyeing wastewater treatment.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Chenhui Bai,Yuxiu Yao,Saeed Ahmed Khan,Jing Li,Fang Yi,Jie Zhang,Hu Shi,Hulin Zhang
Thermogalvanic cells provide an efficient pathway for converting low-grade heat into electricity. Their performance is governed by the Seebeck coefficient, which dictates voltage output and thermoelectric efficiency. Previous efforts to enhance the Seebeck coefficient have focused on entropy contributions from solvent-induced solvation effects, while the impact of configurational entropy in quasi-solid-state networks has received limited attention. Here, we demonstrate that configurational entropy serves as an additional factor modulating the thermoelectric behavior of thermogalvanic hydrogels. Using the PVA hydrogel incorporating the Fe 2+ /Fe 3+ redox couple as a model system, we elucidate how constrained polymer networks alter redox thermodynamics. When a Fe 2+ /Fe 3+ concentration of 0.1 mol L −1 , the Seebeck coefficient in the hydrogel reaches 1.32 mV K −1 , significantly higher than that in aqueous solution (0.75 mV K −1 ). Complementary molecular dynamics simulations further demonstrate that hydrogel chains disturb the first solvation shell, broaden the radial distribution of coordinating water molecules, and increase dipole orientation disorder, thereby amplifying the configurational disparity between oxidized and reduced species. This leads to an enhanced role of configurational entropy in the ionic migration entropy. Our findings therefore highlight rational design ideas for optimizing high-performance quasi-solid-state thermogalvanic cells by quantifying the actual contribution of configurational entropy in the nano-network structure.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yunyun Cheng,Huan Wang,Li Li,Ting Han,Xiao Liang,Lijie Dong
Flexible humidity-sensitive materials have drawn increasing attention due to their vital function in monitoring ambient humidity for tactile sensors, allowing them to approach the functionality of human skin. In this work, an electrospun polyvinyl alcohol (PVA)-based nanofiber film comprising surface-carboxylated CdSe/Cd x Zn 1-x S quantum dots (QDs) is fabricated as a high-performance flexible humidity sensing material, based on the relationship between its photoluminescence (PL) and the humidity. The as-prepared film shows excellent PL-humidity linearity, a wide sensing range from 10% to 90% relative humidity, a relatively fast response time, good recoverability, and flexibility. The humidity sensing mechanism can be attributed to the breaking and reforming of hydrogen bonds and proton transfer occurring at the PVA-QD interfaces. This flexible humidity-sensitive material is believed to be a good candidate for humidity-sensitive components in electronic skin.
研究领域:
材料科学
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纳米技术
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传感技术
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Beibei Zhang,Lihua Zhang,Jin Li,Jiawen Fu,Xiwei Qu
In the present work, a series of PVA and CS blend membranes were studied. These prepared membranes were evaluated by binary mixture gases of CO 2 /N 2 and CO 2 /CH 4 . The optimum ratio of PVA/CS for CO 2 permeance was achieved at 5:5. It recorded a CO 2 permeability of 20.8 GPU (1 GPU = 1 × 10 -6 ·cm 3 (STP)·cm −2 ·s −1 ·cmHg −1 ) with CO 2 /N 2 selectivity of 89.7, as well as CO 2 permeability of 10.2 GPU and CO 2 /CH 4 selectivity of 56.3. Secondly, two kinds of nanoparticle UiO-66 and UiO-66-NH 2 were used to prepare mixed matrix membranes. The effects of nanofiller content and chemical groups on gas permselectivity were investigated. Results show that the addition of nanoparticles can effectively improve the permselectivity of membrane. The mixed matrix membranes addition with UiO-66-NH 2 achieved the optimum CO 2 performance and these were following the order of PVA(5)/CS(5)-UiO-66-NH 2 > PVA(5)/CS(5)-UiO-66 > PVA(5)/CS(5). For all these membranes, the permeance and selectivity present initial increased and then decreased. Mixed matrix membranes addition UiO-66-NH 2 (containing 3.75 wt%) exhibits a CO 2 permeance of 32.77 GPU and CO 2 /N 2 selectivity of 93.47, as well as CO 2 permeance of 25.57 GPU and CO 2 /CH 4 selectivity of 70.1, which was beyond the 2008 Robeson upper bound.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2023
·Vol. 18
·期 1
·1-9
·
IF 4.5
Sun Likun,Xiong Kesi,Zhang Baoning,Fang Jinghong,He Yingchao,Wang Min,Gan Zhixing,Du Fanglin,Sun Qiong,Yu Liyan,Dong Lifeng
In a dual-chamber photocatalytic fuel cell device, polyvinyl alcohol degradation and H 2 evolution were concurrently achieved. The setup involved commercial P25 as the photoanode and Ag@Fe 2 O 3 nanoparticles as the cathode. Additionally, the feasibility of a Fenton-like reaction in the cathode, utilizing Fe 2+ ions and pumped O 2 , was demonstrated. Different cathode materials, polyvinyl alcohol types, and pH values’ effects were assessed on device performance. Quenching tests highlighted photoinduced holes (h + ) and OH· radicals as pivotal contributions to polyvinyl alcohol degradation. Long-term stability of the device was established through cycling experiments.
研究领域:
环境科学
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材料科学
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能源科学
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DOI
高影响因子
MACROMOLECULAR BIOSCIENCE
·
2022
·Vol. 22
·期 10
·2200208
·
IF 5.859
Qingxi Hu,Runsheng Lu,Suihong Liu,Yakui Liu,Yan Gu,Haiguang Zhang
Biocompatible hydrogels have been considered one of the most well-known and promising in various materials used in the fabrication of tissue-engineering scaffolds. Although considerable progress has been made in recent decades, many limitations remain, such as poor mechanical and degradation properties of biomaterials. In addition, vascularization of tissue-engineering scaffold is an enduring challenge, which limited the fabrication and application of scaffold with clinically relevant dimension. To cover these challenges, in this work, a novel nanocomposite interpenetrating polymer networks (IPN) hydrogel scaffold consists of methacrylated gelatin (GelMA), poly(vinyl alcohol) (PVA), and copper oxide nanoparticles (CuONPs) is fabricated by extrusion-based 3D printing. A series of physiochemical and biological characterizations of the nanocomposite GelMA/PVA scaffolds are performed. Results showed that the mechanical and degradation properties of the nanocomposite GelMA/PVA scaffolds are obviously improved compared to GelMA scaffolds with single network. In vitro cell experiments and chick embryo angiogenesis (CEA) assay confirmed good cytocompatibility of the fabricated scaffold and its potential to promote cell migration and angiogenesis. In conclusion, altogether the results demonstrated that GelMA/PVA IPN scaffolds modified with CuONPs have great potential for fabrication of volumetric scaffolds and promote angiogenesis during tissue growth and repair.
研究领域:
材料科学
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生物材料
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组织工程
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纳米技术
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生物医学工程
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DOI
PubMed
高影响因子
ACS Biomaterials Science & Engineering
·
2025
·
IF 5.5
Hermela Feysa,Mengdi Xu,Charles Kumah,Biruk Fentahun Adamu,Esubalew Kasaw Gebeyehu,Mazen Khaled Alsahari,Hua Shen,Guangbiao Xu
Chronic wounds in diabetic and immunocompromised patients often remain inflamed due to infection and high levels of pro-inflammatory cytokines. Effective dressings require biocompatibility and active functions to promote healing and reduce inflammation. Conventional dressings lack bioactive agents, cell compatibility, and sustained therapeutic release properties. This study developed dual-functional wound mats by combining molecular docking and electrospinning to load Rumex abyssinicus (RA) extracts into poly(vinyl alcohol)-polyvinylpyrrolidone (PVA–PVP) nanofibers. Molecular docking revealed that γ-sitosterol strongly binds to tumor necrosis factor-alpha (TNF-α) (−11.6 kcal/mol) and transforming growth factor beta-1 (TGF-βR I) (−11.2 kcal/mol), while phytol and linolenic acid derivatives showed moderate interactions with inflammatory and microbial targets. These compounds met the drug-likeness and absorption, distribution, metabolism, excretion, and toxicity (ADMET) criteria. The RA-loaded nanofibers (180–450 nm) were uniform and bead-free, as confirmed by Fourier-transform infrared spectroscopy and X-ray diffraction. The mats exhibited moderate hydrophilicity (contact angle 65°–70°), controlled biodegradability over 14 days, and optimal water vapor transmission rates (1450–1650 g/m2/day) for moist healing. RA release was sustained, reaching 80% at 72 h. The mats exhibited concentration-dependent antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) and high cytocompatibility (105.6–116.5%). In vivo, RA mats accelerated wound closure to 97% by Day 15, enhanced collagen deposition (75%), reduced inflammation (18%), and suppressed TNF-α and interleukin-6 (IL-6) by up to 85 and 95%, respectively. By integration of phytochemicals from renewable plant sources with water-soluble and biocompatible polymers, this study contributes to the development of sustainable wound-care materials. RA-based nanofibers are promising multifunctional wound-dressing materials.
研究领域:
生物医学工程
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植物药学
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纳米技术
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伤口护理
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高分子科学
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计算机辅助药理学
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可持续材料
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产品关联
DOI
PubMed
高影响因子
Water
·
2025
·Vol. 17
·期 6
·885
·
IF 3
Qunhua Zhou,Yu Sun,Ziye Li,Siqin Sun,Jianshe Hu,Zhangpei Chen,Aikebaier Reheman
Chitosan (CS) and polyvinyl alcohol (PVA) nanofiber membranes were synthesized via electrospinning and used as supporting materials for powdered porous organic polymer (POP). These membranes were then crosslinked with glutaraldehyde, resulting in nanofiber membranes (CS/PVA/POP) as an efficient adsorbent for Hg(II) ions. Characterization using Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy showed that the membranes effectively removed up to 92.9% of mercury ions at optimal conditions, with an adsorption capacity of 116.1 mg/g. The adsorption data fit well with the Langmuir isotherm and pseudo-second-order kinetic models. The efficient uptake of mercury ions was attributed to chemisorption involving active groups (C=S, -NH2, -OH), facilitated by mechanisms such as chelation, complexation, or electron exchange. TheCS/PVA/POPnanofiber membranes demonstrated significant advantages in adsorption capacity, economic viability, and recyclability, providing an effective solution to mercury pollution in water.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 4
·e56423
·
IF 2.7
Xinqiu Hong,Haifeng Li
Polyvinyl alcohol (PVA) fibers were manufactured by gel spinning with reinforcing of attapulgite (ATT) and cross-linking of boric acid (PVA/B/ATT fibers), in order to improve the mechanical properties. Furthermore, the final fibers were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR), differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), powder x-ray diffraction (XRD) and tensile strength tester. In addition, when ATT amount was no more than 2.0 wt%, FTIR analyses suggested that the degrees of cooperation combining of ATT and boric acid with PVA macromolecules were enhanced. SEM images indicated that PVA/B/ATT fibers had smooth surfaces. DSC, TGA and XRD results illustrated that the melting temperatures and maximum thermal decomposition temperatures first increased and then dropped as the content of ATT increased. Moreover, mechanical properties results indicated that the optimal ATT amount was 2.0 wt%, and the tensile strength of PVA/B/ATT-2 fiber reached the highest of 14.2 ± 0.3 cN/dtex. It was largely because that the cooperation combining of boric acid and ATT with PVA molecules improved the mechanical properties of PVA/B/ATT fibers.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2024
·Vol. 31
·期 12
·1-15
·
IF 2.6
Wang Ziyu,Shi Gege,He Yanyang,Wu Ranran,Hu Yufang,Wang Sui,Mao Jie
Annealing is a heat treatment process for materials. In this study, a conductive hydrogel was synthesized by a one-pot method using three raw materials: polyvinyl alcohol(PVA), carboxylated carbon nanotubes(Multi-Walled Carbon Nanotubes-COOH, MWCNTs-COOH) and polyethyleneimine (PEI). Based on the traditional freeze-thaw method for the preparation of PVA-based hydrogels, the annealing treatment was further added here to enhance the mechanical properties and fatigue resistance of the hydrogels. The synthesized conductive hydrogels were annealed in oven at different temperatures for a certain time, and the optimized experimental conditions and results were: the mechanical properties of the conductive hydrogel were best improved under the condition of 100 ℃-20 min, with the ultimate stress of 30.8 MPa and toughness as high as 779.58 MJ/m 3 . A high-strength, fatigue-resistant conductive hydrogel was successfully prepared, and its mechanical properties far exceeded those of other conductive hydrogels. Through a series of tests such as X-ray powder diffraction (XRD) and scanning electron microscopy (SEM), it was found that annealing promotes the orderly arrangement of PVA chains and crystallization through high temperatures, so as to enhance the mechanical properties of hydrogels. As a relatively simple and inexpensive annealing post-treatment technique, it is expected to be more widely used in improving the mechanical properties of hydrogels.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tianle Liu,Shitian Zhao,Guokun Yang,Mingsheng Chen,Junhui Kou,Weijian Wang,Guosheng Jiang,Shaojun Zheng
Prominent thermal management, electromagnetic interference(EMI) shielding, and anti-ionizing radiation capabilities are essential trends in developing flexible materials. In this study, we developed a novel flexible MXene/polyvinyl alcohol/ microencapsulated phase change material (MPM) phase change composite film with a sandwich structure using an alternating vacuum filtration method. This film demonstrates good toughness, strength, stability, and durability. Incorporating microencapsulated phase change material(MEPCMs) enhances the enthalpy of the films (110.2J/g). Additionally, due to the incorporation of phase change microcapsules with a unique barium sulfate-based (BaSO 4 ) as the wall material, the films not only possess EMI shielding performance(39.7 dB), but also exhibits resistance to ionizing radiation(4.62 cm 2 g −1 ). Notably, the film can convert light and electrical energy into heat and store this heat as latent heat within the MEPCMs, enabling multi-source thermal management capability. The ease of preparation and exceptional performance of MPM make it highly suitable for a wide range of industrial and wearable applications.
研究领域:
材料科学
·
能源工程
·
辐射防护
·
柔性材料开发
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产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2026
·
IF 5.4
Runying Gao,Ran Mei,Birong Zeng,Wei Lin,Guorong Chen,Weiang Luo,Yiting Xu,Conghui Yuan,Lizong Dai
Employing carbon dots as the crosslinking agent for polyvinyl alcohol (PVA) allows the formation of multiple interactions between carbon dots and PVA. • The fragmented PVA/BP-CDs0.3 vitrimer film can be reprocessed via hot pressing at 150 °C for 2 h to regenerate an intact film. • The phosphorus species present on the surface of carbon dots simultaneously imparts good flame-retardant properties to the composite PVA vitrimer film with a 27.7% LOI and VTM-0 rating. • Compared with pure PVA, the tensile strength of the PVA/BP-CDs0.3 composite vitrimer film is increased by approximately 122%, while its Young's modulus is enhanced by about 35%. The design of crosslinked network is important for polyvinyl alcohol (PVA) to overcome the disadvantages in weak mechanical strength and water resistance. Herein, the strategy of using carbon dots as PVA crosslinking agent was proposed. The carbon dots made of phenylboric acid and phosphoric acid could generate the combination effect of nano-enforcement and dynamic exchangeable network in PVA because of the multiple interactions between PVA and carbon dots. In addition, the existence of phosphorus element on the carbon dots could be expected to synchronously endow the composited PVA film with flame retardancy. The experimental results showed that compared to pure PVA, the tensile strength of PVA/BP-CDs0.3 significantly increased from 63.89 MPa to 142.03 MPa, and the Young's modulus increased from 1.56 GPa to 2.10 GPa, respectively. The limiting oxygen index (LOI) and vertical burning rating of PVA/BP-CDs0.3 were also improved to be 27.7% and a VTM-0 grade. Furthermore, it retained a mechanical strength of 16.05 MPa after being immersed in water for 15 days, indicating an excellent water resistance. It was worth noting that the shredded PVA/BP-CDs0.3 film could be reprocessed under hot-pressing with the condition of 150 °C and 2 h, forming a complete film. This work is helpful to provide new insights for the development of functional and recyclable PVA composite vitrimer film. Download: Download high-res image (138KB) Download: Download full-size image
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