SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Zilu Liu,Bingtao Tang,Shufen Zhang
Polyethylene glycol (PEG)/poly Acrylic acid (PAA)/silica (SiO 2 ) composite phase change materials (PCMs) with strong shape stability were successfully synthesized by a simultaneous sol-gel reaction, and in situ free radical polymerization . The network structure, shape stability, phase change enthalpy , and thermostability of the prepared materials were characterized through FT-IR, DSC , TGA , and XRD . The synthesized PEG/PAA/SiO 2 composite PCMs with a semi-interpenetrating network (semi-IPN) exhibited a high phase change enthalpy of 172.9 J/g and strong shape stability under 355 °C. The interaction between PEG and PAA/SiO 2 network was also discussed in this paper, as well as the relationship between the interaction, energy density , and shape stability. The prepared PEG/PAA/SiO 2 composite PCMs provided a novel method in preparing shape stable phase change materials.
研究领域:
材料科学
·
能源存储
·
化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yan Bao,Jingxiang Chang,Yuanxia Zhang,Lu Chen
Superhydrophobic coating can be widely used in many fields because it is not easily wetted by water like lotus leaves. However, most of superhydrophobic coating is difficult to withstand abrasion attack. Herein, hollow SiO 2 /PAA-b-PS Janus microspheres were synthesized via emulsion interfacial synthesis method using amphiphilic block copolymer of polyacrylic acid block polystyrene (PAA-b-PS) and hollow NH 2 -SiO 2 microspheres as raw materials in this paper. Because the hemisphere grafting organic polymer chain was hydrophobic and the other hemisphere was hydrophilic and contained amino groups, hollow SiO 2 /PAA-b-PS Janus microspheres exhibited amphiphilic and asymmetrical nature, which was a typical inorganic/polymer Janus microspheres. Robust superhydrophobic coating was facilely achieved using hollow SiO 2 /PAA-b-PS Janus microspheres on polyurethane pretreated substrate like leather and fabric. Robust superhydrophobic coating after 90 sandpaper abrasion cycles still retained excellent superhydrophobicity. As expected, robust superhydrophobic coating had prominent self-cleaning property against different pollutants and was capable to separate a variety of oil–water mixtures with ultrahigh separation efficiency. The separation efficiency of robust superhydrophobic coating for oil–water mixture was maintained above 98% even after 40 separation cycles. In total, robust superhydrophobic coating constructed by hollow SiO 2 /PAA-b-PS Janus microspheres possesses distinguished superhydrophobicity, abrasion resistance, self-cleaning, oil–water separation capacity and universality, which shows a promising application in multifunctional coating.
研究领域:
材料科学
·
表面化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Long Chen,Zhiyuan Li,Penghui Zhang,Peijing Tian,Jian Yuan,Weihong Zheng
Hollow spherical silica film has been used on glass substrates as an antireflective coating, and PAA is one of the common templates for preparing SiO 2 films by sol-gel method. In this paper, the effects of polyacrylic acid (PAA) content on the SiO 2 films prepared by the sol-gel method were analyzed using TEM, DLS, XRD , IR, SEM, and the transmission spectrum. The sol containing hollow spherical micelles can be prepared well from tetraethyl orthosilicate (TEOS) as raw material and PAA as water-soluble polymer by improved Stober, and template method. With the increase of PAA content, the particle size of hollow spherical silica colloidal particles increases and the quantity decreases. The sol is attached to the surface of the soda lime glass substrate to form a film by dip-coating method. With the increase of withdrawal speed, the transmittance of the glass increases, and with the increase of PAA content from 0.1g to 0.6g, the sample's transmittance decreases first and then increases.
研究领域:
材料科学
·
光学
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DOI
高影响因子
Environmental Technology & Innovation
·
2023
·
IF 7.1
Tengfei Wu,Junjie Lei,Liyun Lin,Qing Wang,Taimoor Hassan Farooq,Guangjun Wang,Jun Wang,Wende Yan
Developing high-efficient and easy-to-recover adsorbents for the removal of toxic metals in water is imperative, although it poses a huge challenge. In this study, a sulfur-functionalized metal-organic framework was incorporated into Ca-alginate/polyacrylic acid granulates as an effective adsorbent ( abbr. CPZ-SH) for Cu 2+ and Cd 2+ removal. The physicochemical properties of the obtained CPZ-SH were determined by the integrated characterization techniques (e.g., FTIR, XRD, and SEM). The environmental effects of solution pH, typical background cations (K + , Na + , Mg 2+ , and Ca 2+ ), and dissolved organic matter were assessed to determine the adsorption behaviors of the granulates. Time-dependent adsorption kinetics suggested that the adsorption process was dominated by an intraparticle diffusion procedure. CPZ-SH exhibited maximum adsorption capacities of 75.8 and 48.4 mg g –1 at 30 ℃, and excellent adsorption reusability with Cu 2+ and Cd 2+ adsorption efficiencies over 96.0% and 85.1% after 10 cycles, respectively. The extended X-ray absorption fine structure (EXAFS) demonstrated that the functional groups (thiol, carboxyl, and hydroxyl) played a crucial role in adsorption processes. The findings provided an effective strategy to construct nanostructured metal-organic frameworks (MOFs) into granulates as recyclable adsorbents and enable heavy metal removal from 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
Small
·
2024
·
IF 13
Lin Mei,Wenchong Ouyang,Limin Xu,Yuanlong Huang,Qi Liu,Yu Bai,Quanming Lu,Tianzhi Luo,Zhengwei Wu
Hydrogels present significant potential in flexible materials designed for electromagnetic interference (EMI) shielding, attributed to their soft, stretchable mechanical properties and water-rich porous structures. Unfortunately, EMI shielding hydrogels commonly suffer from low mechanical properties, deficient fracture energy, and low strength, which limit the serviceability of these materials in complex mechanical environments. In this study, the double network strategy is successfully utilized along with the Hofmeister effect to create MXene/PAA (polyacrylic acid)-CS (chitosan) hydrogels and further strengthen and toughen the gel with (NH 4 ) 2 SO 4 solution. The gel exhibits enhanced functionalities such as outstanding stretchability, excellent strain sensitivity (11.66), and super fracture energy (≥9 kJ m −2 ). Notably, it demonstrates outstanding shielding effectiveness of 73.8 dB in the terahertz (THz) range, and the shielding properties can be effectively tuned by varying the MXene content, the (NH 4 ) 2 SO 4 concentration, and the thickness of the hydrogel. Additionally, the gel shows robust and superior shielding effectiveness after repeated stretching and long-term dehydration. The MXene/PAA-CS double-network (DN) hydrogels would be an excellent candidate for EMI shielding materials in advanced flexible electronic equipment and soft robots.
研究领域:
材料科学
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柔性电子
·
电磁学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zhengdong Feng,Danlin Li,Fangyi Li,Jiang Zhao
Green one-step UV-cured self-adhesive PAA-GO@SF hydrogels without toxic reagents. • Tuning conductive-to-polymer ratio links GO dispersion to hydrogen-bonding network and electromechanical properties. • Balanced performance (GF = 3.68, >1000 cycles, >120 days) enables reliable ECG and HMI applications. Hydrogels are attractive for flexible sensors due to their softness, biocompatibility, and stretchability, but complex fabrication often limits their practical application. Here, we report a self-adhesive sensing hydrogel fabricated via a straightforward one-step ultraviolet-induced copolymerization of polyacrylic acid (PAA) and graphene oxide (GO), with silk fibroin (SF) serving as a biomolecular dispersant and crosslinker to ensure a stable, homogeneous network. The resulting PAA-GO@SF hydrogel delivers a high tensile strength of 120 kPa, a gauge factor (GF) of 3.68, and stable operation over 1000 stretching cycles. In contrast, the same formulation without SF shows a GF of only 1.36, confirming that SF plays a critical role in achieving enhanced sensitivity. The sensing hydrogel enables real-time, high-fidelity detection of physiological signals, including electrocardiogram (ECG) waveforms with clearly distinguishable P-QRS-T (P, QRS, and T waves) features. As a direct benefit for targeted applications, a conformal hydrogel-based sensor array attached to a human hand allows a robotic hand to accurately mimic complex gestures, demonstrating the hydrogel-based sensor's utility in human–machine interaction (HMI). Overall, this work presents a scalable and eco-friendly strategy for multifunctional sensing hydrogel, with clear advantages for electronic skin, motion monitoring, and intelligent robotics.
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DOI
高影响因子
JOURNAL OF CULTURAL HERITAGE
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2026
·
IF 3.7
Ting Zhao,Yan-Xia Di,Ping-Chuan Gao,Ying Wu,Yi Liu,Yuan Fang,Zhuo Wang,Jian-Feng Zhu,Wen-Zong Yang,Yi Qin
A PVA-PAA hydrogel encapsulates microemulsions for non-invasive mural smoke removal. • PVA:PAA 7:3 hydrogel has high strength (0.66 MPa, 700%) and 67% liquid retention. • This hydrogel restores mural shape and color, enabling non-destructive cleaning. As a significant heritage of human civilization, murals often develop hydrophobic smoke deposits on their surfaces due to the combustion of incense, candles, and Yak butter, posing a serious threat to their long-term preservation. Traditional cleaning methods fail to meet the stringent requirements of cultural relic conservation, particularly with regard to safety, controllability, and non-destructiveness, thereby highlighting the urgent need for a gentle, safe, and controllable cleaning strategy. To address this challenge, this study developed a polyvinyl alcohol-polyacrylic acid (PVA-PAA) double-network hydrogel loaded with an oil-in-water (O/W) microemulsion (composed of AEO-9, SDBS, n-pentanol, liquid paraffin, and water) via a solvent displacement method. The hydrogel forms a three-dimensional network through the synergistic interaction between PVA and PAA, achieving stable cross-linking primarily through hydrogen bonding. The influence of varying PVA:PAA mass ratios on hydrogel performance was systematically investigated. Results demonstrated that the hydrogel with a mass ratio of 7:3 exhibited optimal mechanical properties(the tensile stress is 0.66 MPa and the strain is 700%.), swelling capacity(110%), and liquid retention(the water retention rate is 67% after working at 60 degrees celsius for 4 h.). The cleaning evaluation demonstrates that following treatment with the system, the surface morphology, color difference, and contact angle of the simulated mural samples with smoke deposits mural closely resemble those of the original sample. This indicates that the system can gently penetrate the contamination layer, effectively promote the emulsification and dispersion of pollutants, and preserve the structural integrity of the underlying mural substrate. This research presents a novel, controllable, and non–destructive cleaning strategy for the removal of complex hydrophobic contaminants from cultural relic surfaces, offering strong potential for practical application.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Changning Hu,Jie He,Tianyou Zhu,Yubin Chen,Yinjie Peng
Conductive hydrogels possess excellent flexibility and tunable conductivity, making them promising materials for flexible strain sensor and triboelectric nanogenerator (TENG). However, conventional conductive hydrogels suffer from low mechanical strength, toxic crosslinkers, and poor recyclability. In this study, a lignosulfonate (LS)-Fe 3 + autocatalytic system was utilized to rapidly initiate the polymerization of polyacrylic acid (PAA). In addition, carboxymethyl cellulose (CMC) was incorporated to reinforce mechanical strength, while ethylene glycol (EG) was introduced to improve antifreezing and moisturizing properties. The resulting PCL-EG hydrogel was employed to fabricate flexible strain sensor and triboelectric nanogenerator. This hydrogel exhibits outstanding adhesion, self-healing ability, and recyclability. The PCL-EG hydrogel-based strain sensor exhibits a wide detection range and high sensitivity (GF = 13.3 at 300–500 % strain), enabling reliable monitoring of human motion across multiple body regions. Furthermore, TENG assembled with the PCL-EG hydrogel generate stable electrical output, sufficient to power small wearable electronics and support self-powered signal transmission. This work offers valuable insights and guidance for the development of multifunctional flexible electronic devices.
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DOI
高影响因子
POLYMER
·
2026
·
IF 4.5
Ashraful Islam,Sudip Kumar Lahiri,Md.Akil Akhter,Muhammad Imran,Dong Mengmeng,Yanbo Liu
Air pollution is a major concern due to rising particulate matter (PM) levels, requiring efficient filtration technologies for respiratory protection, and integrating eco-friendly fabrication methods further enhances environmental sustainability. We report water-insoluble nanofibrous membranes that combine high filtration efficiency (FE) with a low pressure drop (ΔP) for use in such masks. Using 18% (w/v) polyvinyl alcohol (PVA) and polyacrylic acid (PAA) solutions in water, we electrospun four types of nanofiber membranes under optimised conditions (25 kV, 20 cm, 25 °C, 50% RH). These included a pure PVA membrane and three PVA/PAA (60/40 wt.%) composite membranes containing PAA of 3 kDa (NFM-1), 50 kDa (NFM-2), and both 3 kDa and 50 kDa (NFM-3). To induce crosslinking, all membranes were heat-treated at 100–160 °C for 25 min. Filtration tests showed that NFM-2 heat-treated at 140 °C achieved ∼99% FE for particles ≥0.5 μm, with a ΔP of only 48 ± 1 Pa. Scanning electron microscopy revealed smooth fibres with an average diameter of ∼192 nm and 59% porosity for NFM-2. Fourier transform infrared (FTIR) spectroscopy confirmed the formation of ester linkages (–C=O–O–R) at ≥120 °C between PVA and PAA, indicating successful thermal crosslinking and improved stability. After crosslinking, NFM-2 also exhibited a water contact angle (θ) of ∼90° and retained 100% of its weight after immersion in 70 °C water, demonstrating complete water insolubility. The nanofiber membranes were further integrated with polypropylene (PP) spunbond and meltblown nonwovens in multilayer assemblies (up to four layers) to evaluate composite filter performance. This water-based, organic-solvent-free electrospinning process offers a green approach to producing high-performance respiratory filters.
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Jiajun Zuo,Shixia Zhang,Jingjing Gou,Nong Wang
Oil–water separation in industrial production processes and the effective treatment of oil-contaminated wastewater are significant challenges in both process engineering and environmental management. Traditional oil–water separation materials often suffer from low separation efficiency, oil fouling and clogging, and poor mechanical stability. In this study, a novel hydrogel/nickel foam oil–water separation material with a stable interpenetrating network structure was successfully fabricated by preparing copolymer hydrogels of acrylic acid (AA) and dimethylaminoethyl methacrylate (DMAEMA) on the surface of three-dimensional porous nickel foam, which exhibit superhydrophilicity with a water contact angle of 0° and underwater superoleophobicity with an underwater oil contact angle exceeding 150°, demonstrating excellent oil–water separation performance. It achieves separation efficiencies greater than 99.0% for various oil–water mixtures, with a water flux as high as 50 000 L m−2 h−1. Due to its robust interpenetrating network structure, the material maintains high performance even after 30 cycles of separation. This work provides a novel design strategy for developing efficient, durable, and environmentally friendly oil–water separation materials.
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DOI
高影响因子
ACTA PHARMACOLOGICA SINICA
·
2021
·Vol. 42
·期 5
·832-842
·
IF 6.15
Zhang Bing-bing,Chen Xiao-jie,Fan Xu-dong,Zhu Jing-jing,Wei Ying-hui,Zheng Hang-sheng,Zheng Hong-yue,Wang Bin-hui,Piao Ji-gang,Li Fan-zhu
Nanomedicine has attracted increasing attention and emerged as a safer and more effective modality in cancer treatment than conventional chemotherapy. In particular, the distinction of tumor microenvironment and normal tissues is often used in stimulus-responsive drug delivery systems for controlled release of therapeutic agents at target sites. In this study, we developed mesoporous silica nanoparticles (MSNs) coated with polyacrylic acid (PAA), and pH-sensitive lipid (PSL) for synergistic delivery and dual-pH-responsive sequential release of arsenic trioxide (ATO) and paclitaxel (PTX) (PL-PMSN-PTX/ATO). Tumor-targeting peptide F56 was used to modify MSNs, which conferred a target-specific delivery to cancer and endothelial cells under neoangiogenesis. PAA- and PSL-coated nanoparticles were characterized by TGA, TEM, FT-IR, and DLS. The drug-loaded nanoparticles displayed a dual-pH-responsive (pH e = 6.5, pH endo = 5.0) and sequential drug release profile. PTX within PSL was preferentially released at pH = 6.5, whereas ATO was mainly released at pH = 5.0. Drug-free carriers showed low cytotoxicity toward MCF-7 cells, but ATO and PTX co-delivered nanoparticles displayed a significant synergistic effect against MCF-7 cells, showing greater cell-cycle arrest in treated cells and more activation of apoptosis-related proteins than free drugs. Furthermore, the extracellular release of PTX caused an expansion of the interstitial space, allowing deeper penetration of the nanoparticles into the tumor mass through a tumor priming effect. As a result, FPL-PMSN-PTX/ATO exhibited improved in vivo circulation time, tumor-targeted delivery, and overall therapeutic efficacy.
研究领域:
纳米技术
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药学
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癌症研究
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2021
·
IF 3.517
Keju Zhang,Yuhong Zhang,Yulin Li,Zoya Iqbal,Li Yu,Jiyan Liu,Haiping Wang,Peixin He
The synthesis of drug delivery systems based on hollow mesoporous silica nanoparticles (MSNs) is still a major challenge. In this work, the hollow hybrid MSNs were successfully prepared by cetyltrimethylammonium bromide-directed sol-gel process and one-step hydrothermal treatment process. The hollow hybrid MSNs had hybrid ethane-bridged frameworks with the uniform particle size (250 nm) and mesoporous pore diameter (3.7 nm). The polyacrylic acid (PAA) encapsulated drug delivery system based on hollow hybrid MSNs was prepared by using silanization, surface modification, doxorubicin hydrochloride (DOX) loading, and PAA coating. Drug encapsulation and release behavior at different temperatures and pH were studied by using DOX as a model guest molecule. The results displayed that the modified hollow ethane-bridged MSNs possessed good biocompatibility and excellent thermal/pH-dual-sensitive drug release property. This novel thermal/pH-sensitive drug delivery system based on hollow ethane-bridged MSNs has the advantages of feasible synthesis, no cytotoxicity, and good drug loading capacity, which may have potential applications in the anticancer therapy.
研究领域:
材料科学
·
药学
·
生物医学工程
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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）