CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
XinYi Tian,BoHao Wang,Chao Tong,YaJuan Li,YaJun Zhang,XuDong Yu
Sodium phytate boosts the hydrogel's tensile strength from 36 kPa to 10.3 MPa (>280-fold) with a toughness of 51.5 MJ/m³. • The PCP hydrogel enables strain (0–800%) and temperature (−20 °C to 50 °C) sensing with a fast response time of ∼205 ms. • The PCP hydrogel possesses excellent flame retardancy, achieving a high LOI value of 47% Supramolecular hydrogels assembled through weak non-covalent interactions face major challenges in achieving high strength and conductivity for sensor applications. Molecular-level engineering to enhance interchain interactions offers a promising solution. Herein, a strong and tough conductive hydrogel is fabricated by introducing phytic acid sodium salt (PAS) into a collagen/polyvinyl alcohol (PVA) matrix via freeze-thaw and salting-out methods. Mechanistic analyses indicate that the enhanced network arises from PAS-induced formation and densification of multiple physical interactions, including hydrogen bonding, electrostatic interactions. The optimized hydrogel exhibits a tensile strength of ≈10.3 MPa, a toughness of ≈51.5 MJ/m 3 , and stretchability >700%, ranking among the strongest collagen/PVA hydrogels reported to date. Moreover, the hydrogel exhibits stable ionic conductivity, enabling its application as a multifunctional strain sensor for human activity monitoring, Morse code transmission, and temperature detection. This work provides a versatile and biocompatible platform for flexible electronics and wearable devices. Download: Download high-res image (232KB) Download: Download full-size image
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Zheng Yang,Jing Xiao,Wulue Xu,Qi Liu,Hongxia Gao,Min Xiao,Zhiwu Liang
The precise removal of heat-stable salts (HSS) from an amine solution remains a challenge where the current separation process can cause ineligible amine loss and decrease the CO2 capture efficiency. This work proposed an interpenetrating polymer network gel (SA-Al/PVA@ME) constructed with sodium alginate (SA), aluminum ions, and poly(vinyl alcohol) (PVA), followed by melamine encapsulation. The formulation of the adsorbent was optimized by orthogonal experiments, leading to an HSS adsorption capacity of 128.28 mg·g–1 in monoethanolamine solution. The encapsulation of melamine (ME) promoted its adsorption affinity for HSS with a slight decrease of capacity. The kinetics and isotherms studies verify the adsorption behavior, and the mechanism was revealed through Fourier transform infrared, Brunauer–Emmett–Teller, scanning electron microscopy–energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy analysis, suggesting the comprehensive effect of synergistic electrostatic interaction, ion exchange, coordination bonding, hydrogen bonding, and steric hindrance. The results suggest a new strategy to formulate adsorbents with high HSS removal efficiency and good selectivity over amine.
研究领域:
环境科学
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高分子化学
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碳捕集与封存
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吸附技术
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化学工程
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 59
·期 2
·715-727
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IF 4.5
Li Bin,Zhou Mengjing,Wu Aolin,Liu Haiying,Du Li,Su Lihua
Preparation of composite hydrogels by in situ polymerization (SP) using choline chloride (ChCl), acrylamide (AM), and urea (U) as raw materials for deep eutectic solvent (DES), with the introduction of PVA and PVDF as fillers into DES. Characterization of the composite hydrogels was conducted using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). This study analyzed the pressure sensitivity, piezoelectricity, swelling behavior, and mechanical properties of the composite hydrogels. The results indicate that due to the dipole–dipole interactions between PVA and PVDF, the composite hydrogels exhibit excellent pressure sensitivity and piezoelectric performance. When the ratio of PVA to PVDF is 1:1, the composite hydrogels exhibit optimal performance, with a 3.37-fold increase in pressure sensitivity and a 6.49-fold increase in piezoelectricity compared to other ratios. This research provides a method for preparing composite hydrogels with excellent piezoelectric performance and pressure sensitivity.
研究领域:
材料科学
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高分子科学
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化学工程
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纳米技术
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FUEL
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2022
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IF 8.035
Jian Qiao,Xiang-Ming Hu,Yun-Tao Liang,Qian Zhang,Wei Wang,Yan-Yun Zhao,Shuang Ju,Fu-Chao Tian
In order to improve the stability time and foaming ratio of gel foam, and change the traditional preparation method of gel foam. In this paper, using super-hydrophobic nanoparticles , PVA, sodium tetraborate and sodium bicarbonate as the main raw materials, based on the self-assembly effect of super-hydrophobic nanoparticles and hydrophilic macromolecules, a high-foaming gel foam (PGF) without foaming agent was prepared. Through the test, the foaming volume of the 100 ml PGF can reach 329 ml without adding foaming agent, which is 1.4 times of the traditional gel foam (TGF) and 1.2 times of the viscous foam (VF). Even without foaming agent, the PGF has a half-life of more than 13 days and can retain water for more than 15 h at 100 °C. Response surface analysis showed that the foaming performance of the PGF was affected by nanoparticles, sodium tetraborate and sodium bicarbonate, among which the content of nanoparticles was the main factor. At the same time, sodium tetraborate and sodium bicarbonate also significantly affect the water retention performance of PGF. Fire prevention experiments show that the gel foam prepared by this method also has excellent fire prevention ability, which can effectively inhibit the consumption of hydroxyl group and the generation of methyl and methylene group in the process of coal oxidation. Moreover, it can still play an inhibiting ability at a high temperature of 400 °C, and can effectively prevent the recurrence of coal fire after extinguishing. The development of PGF provides a new method for the preparation of gel foam in the future. At the same time, the application of foaming agent is avoided, which reduces the pollution of surfactant to the environment.
研究领域:
材料科学
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消防工程
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能源安全
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高分子化学
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界面科学
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2016
·Vol. 18
·期 46
·31634-31639
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IF 4.449
Lan Wang,Xiaojiao Kang,Daocheng Pan
Flexible luminescent materials, with the advantages of foldability and crack resistance, have attracted extensive interest owing to their broad application in collapsible optoelectronic devices. In this work, highly luminescent water-soluble green and red AgInS2/ZnS core/shell quantum dots (QDs) are synthesized in an electric pressure cooker. Luminescent and flexible films are fabricated by combining QDs with polyvinyl alcohol (PVA), and the green and red QD/PVA films show a high photoluminescence quantum yield (PLQY) of about 55% and 64% upon 460 nm excitation, respectively. Finally, the green and red QD/PVA films are successfully applied on top of a conventional blue InGaN chip for remote-type warm-white LEDs. As-fabricated warm-white LEDs exhibit a higher color rendering index (CRI) of about 90.2 and a correlated color temperature (CCT) of 3698 K.
研究领域:
材料科学
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纳米技术
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光电子学
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固态照明
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SOLAR ENERGY
·
2023
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IF 6.7
Lixiang Luo,Wenxing Luo,Wenjing Chen,Xiaowu Hu,Yan Ma,Shikun Xiao,Qinglin Li,Xiongxin Jiang
Polyvinyl alcohol (PVA) aerogel is usually used to restrict the flow of liquid polyethylene glycol (PEG) for the preparation of composite phase change materials (PCM). Currently, the vacuum freeze-drying method is demonstrated to be the most valid way to prepare PVA aerogel. However, achieving a high thermal conductivity and optical thermal conversion efficiency in composite PCM remains challenging, due to the lack of effective thermal conductivity fillers and optical thermal conversion media within the reported PVA aerogel. Herein, we report a simple method to prepare PVA-reduced graphene oxide (rGO) aerogel by reductant reduction and vacuum freeze-drying methods. PVA-rGO aerogel is well suitable to accommodate PEG, and the consequent composite PCM (PEG/PVA-rGO) demonstrates an outstanding PEG loading rate of up to 96.9 wt%. In addition, due to the efficient light absorption and highly thermal conductivity of rGO, the photothermal conversion efficiency of PEG/PVA-rGO was increased to 88.2%, while also increasing its thermal conductivity to 0.348 W/(m·K). The melting enthalpy of PEG/PVA-rGO is measured to be as large as 155.5 J/g. Furthermore, the use of PEG/PVA-rGO for solar-thermal energy storage application is demonstrated. This work provides valuable guidance for preparing high-performance form-stable composite PCM and raises their potential for practical use in solar energy storage and energy-efficient buildings.
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EUROPEAN POLYMER JOURNAL
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2023
·
IF 6
Liying Wan,Peijie Li,Meiling Yan,Jianhong Wang,Xibao Li
Conductive hydrogels have attracted much attention in soft electronic devices. However, it is still a challenging to be integrated with outstanding mechanical performance, self-healing, shape memory and conductive capability. Herein, we developed a multifunctional conductive hydrogel via interpenetrating network (IPN) and multiple hydrogen bond interaction. Poly (acrylic acid)-polyaniline (PAA-PANI) and polyvinyl alcohol (PVA) form bones of IPN through chemical and physical double cross-linking. Chemically crosslinking of IPN was obtained by in situ polymerization of acrylic acid and aniline. Physical crosslinking is realized by more multiple hydrogen bonds (N–H···O, O–H···O, O–H···N, N–H···N) interaction among PVA, polydopamine and PF127 diamino oxygen derivatives. PANI forms a conductive path in the IPN to ensure its conductivity. IPN hydrogels with multiple hydrogen bonds has excellent mechanical strength, which is much higher than conventional conductive hydrogels. Moreover, the structure endowed the hydrogel low swelling property, good self-healing and thermal-responsive shape memory effect. The multifunctional IPN conductive hydrogel have potential applications in smart devices including self-healing electronic devices, soft robot, and sensors.
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CELLULOSE
·
2022
·Vol. 29
·期 17
·9323-9339
·
IF 6.123
Zhang Lei,Hu Oudong,Zhang Jin,Hou Linxi,Ye Dezhan,Jiang Xiancai,Xiao Gao
Integrating high ionic conductivity and robust mechanical properties into one hydrogel remains challenging to date. In this paper, poly(vinyl alcohol)/carboxymethyl chitosan/tannic acid/NaCl/glycerol (PCTNG) organohydrogel was prepared by introducing tannic acid (TA), NaCl and glycerol (Gly) into poly(vinyl alcohol)/carboxymethyl chitosan (PVA/CMCS) simultaneously. Owing to the multiple hydrogen bonding complexations, the salting-out effect and metal coordination, the PCTNG organohydrogel showed an attractive overall performance with high tensile strength (2.02 MPa), large elongation at break (570.82%), superb ionic conductivity (3.05 S/m), excellent thermoplasticity and thermally assisted self-healing ability. Moreover, the introduction of Gly made PCTNG organohydrogel had high anti-freezing and anti-dehydration properties. The introduction of TA and NaCl endowed PCTNG organohydrogel with anti-bacterial properties. A flexible strain sensor was made based on this organoydrogel and this strain sensor could detect various human activities. This study provided a simple and promising strategy for manufacturing ionic conductive organohydrogel for flexible wearable devices. Graphical abstract
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Jing Duan,Huiping Shao,Jialei Wu,Hongyuan Liu,Siqi Wang,Tao Lin
The design of magnetic composite scaffolds with superior properties has the potential to construct a targeted delivery platform with hyperthermia. In this study, strontium hexaferrite (SrFe 12 O 19 , SrM) magnetic nanoparticles (MNPs) were obtained by the chemical precipitation method. Non-toxic cross-linked biogels were prepared for adhesive ceramic scaffolds, and chitosan/polyvinylalcohol (CS/PVA)-bonded SrM magnetic nanoscaffolds were successfully prepared by 3D gel printing (3DGP) method. The effects of PVA physical cross-linking and in situ formed SiO 2 on the properties of CS-bonded scaffolds were evaluated, and the compressive strengths were increased from 6.13 ± 2.45 MPa to 8.80 ± 2.02 MPa and 17.18 ± 2.15 MPa, respectively. The results showed that the saturation magnetization of SiO 2 /CS/PVA/SrM composite scaffolds was 59.96 emu/g. In vitro immersion experiments showed that the degradation rates of SiO 2 /CS/PVA/SrM scaffolds were 4.90% after 28 days, and the in situ SiO 2 improved the deposition of calcium salts on the scaffolds. The experiments showed that the SrM magnetic scaffolds could not only concentrate magnetic fields to improve the efficiency of targeting deposition but also achieve a weak targeting process without external magnetic field assistance. In vitro cell proliferation test showed that MC3T3-E1 cells had good adhesion and proliferation on the surface of SiO 2 /CS/PVA/SrM scaffolds, which indicated that the scaffolds may be used for bone repairing.
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CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Dongxin He,Xiaojiao Yang,Deshun Huang,Guozong Yue,Luming Yang,Pengxiang Zhao
A novel alkyne functionalized polyvinyl alcohol (alkyne-PVA) encapsulated palladium-MXenes aerogel was fabricated in two steps, and the structure was characterized by scanning electron microscope (SEM), transition electron microscope (TEM) and X-ray diffraction (XRD). The as-prepared aerogel is regarded as an efficient electrocatalyst toward hydrogen evolution reaction (HER) after pyrolysis. Indeed, it shows a very efficient catalytic activity with a low overpotential of 44 mV (at 10 mA cm −2 ) for HER.
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MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 307
·期 2
·2100654
·
IF 4.367
Pengfei Yan,Mengya Li,Jie Liu,Yadi Hu,Keyong Tang
Hydrogel is an ideal wound dressing material because of its 3D network structure, which is similar to that of the extracellular matrix. However, it is a challenge to design antibiotic-free hydrogels with both antibacterial activity and enhanced mechanical strength. In this study, a polyvinyl alcohol (PVA) hybrid hydrogel incorporated with molybdenum disulfide@polydopamine@silver (MoS 2 @PDA@Ag) is prepared for rapid killing of bacteria under irradiation with near-infrared (NIR) light. The interpenetration of MoS 2 -based nanoparticles and PVA molecular chain significantly improves the mechanical property of the hydrogel. The hydrogels demonstrate an excellent photothermal effect and antibacterial activity, and the photocatalytic properties are considerably enhanced by Ag doping. The hydrogel exhibits favorable antibacterial activity after irradiation with 808 nm NIR light for 15 min due to the synergistic effect of reactive oxygen species and hyperthermia. Meanwhile, in vitro 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay further demonstrated that all hydrogels are nontoxic when their effects are examined against mouse fibroblasts ( L929 ) cells. In addition, the MoS 2 @PDA@Ag/PVA hydrogel can promote wound healing compared with the pure PVA hydrogel, demonstrating its significant potential in mitigating bacterial infection of wounds.
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FOOD SCIENCE AND BIOTECHNOLOGY
·
2023
·
IF 2.9
Hou Tianmeng,Wang Feijie,Wang Liqiang
Intelligent controlled release technologies that rely on environmental changes to control the release rate of antimicrobial agents have attracted attention in the field of food preservation. In this paper, cinnamaldehyde (CN) was grafted onto chitosan (CS) to form a pH-responsive controlled-release complex, CS–CN, via the Schiff base reaction. Then, tempo oxidized cellulose nanofibers (CNF) and PVA were prepared as aerogels loaded with CS–CN with different pore parameters (PCNF@CN). Release experiments showed that acid triggered the release of CN and increased the release from 10.3 to 68.4% with increasing pH. In addition, PCNF@CN showed significant pH-responsive antimicrobial properties against Escherichia coli and Staphylococcus aureus . Utilizing the water absorption of the aerogel and triggering the release of CN, the shelf life of fresh meat could be delayed for 4 days. This study demonstrated the potential application of PCNF@CN aerogel in functional food preservation packaging.
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