Arabian Journal of Chemistry
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2023
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IF 6
Yingjian Zhai,Jing Yang
There is an urgent need for an antifouling membrane to treat the large volume of dye-containing wastewater generated annually by the dyeing and printing industry. PDA@ZnO/PVDF membranes were synthesized by doping polydopamine (PDA) and zinc oxide (ZnO) nanoparticles into the polyvinylidene fluoride (PVDF) membranes via non-solvent induced phase separation (NIPS) method in which polyvinylpyrrolidone (PVP) and lithium chloride (LiCl) were chosen as the porogens respectively. Their microstructures were characterized, and the membranes were examined for antifouling properties and membrane separation performance. The presence of PDA@ZnO nanoparticles on the PVDF membrane was evidenced by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) measurements. The addition of PDA@ZnO enhanced the mechanical strength and hydrophilicity of the nanocomposite membranes. The PVDF membranes' water permeability and antifouling properties improved following mixing modification, according to the dye filtration test. The pure water flux of PDA@ZnO/PVDF hybrid membranes changed from 260.0 L·m −2 ·h −1 ·bar −1 to 1339.2 L·m −2 ·h −1 ·bar −1 by varying the concentration of PDA@ZnO nanoparticles from 0 wt% to 1.6 wt%. The retention performance of the modified membranes was shown to be significantly superior to the pure PVDF membrane. The modified membranes with the addition of 2.0 wt% PVP and 1.6 wt% PDA@ZnO nanoparticles had highly disperse blue 79 (DB 79) retentions (88.5%), indicating that the modified membrane possessed the characteristics of a promising membrane for the purification of dye. Tests found that PDA@ZnO significantly improved the membrane's antifouling performance.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
LANGMUIR
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2025
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IF 3.9
Yiming Wu,Jing Yang,Ruifeng Zhang,Hongji Li,Ruihua Mu,Yamei Zhao
Polyvinylidene fluoride (PVDF) membranes represent a potential technology for the in-depth treatment of organic dye-containing wastewater. Nevertheless, the intractable membrane fouling and the limited versatility have significantly constrained its applications. Herein, through the nonsolvent-induced phase inversion method, we have successfully fabricated the PDA@MgO/PVDF and PDA@ZnO/PVDF membranes, which are modified by the synergistic action of MgO or ZnO nanoparticles with polydopamine (PDA), respectively. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), as well as the analyses of pore structure, contact angle, and surface free energy, were utilized to characterize the hybrid membranes. The results demonstrate that the modification of PDA@MgO and PDA@ZnO can enhance the hydrophilicity, pure flux, dye rejection, and pollution resistance of PVDF membranes. The enhanced hydrophilicity of the modified membranes results from the increase in surface free energy and its polar component term. Comparatively, the PDA@ZnO/PVDF membrane exhibits a smaller contact angle (69°) and a higher pure water flux (378.63 L/m2·h·bar), whereas the PDA@MgO/PVDF membrane possesses greater mechanical strength and better antifouling performance. The PDA@MgO/PVDF membrane can achieve a rejection rate of 94.6% for disperse deep blue 79, and the flux recovery rate can reach approximately 82%. This research offers novel insights into the application of PVDF membranes for the treatment of organic dye-containing wastewater.
研究领域:
材料科学
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环境工程
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产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
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2024
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IF 5.8
Ziwei Lv,Hongxu Liu,Jingxuan Zhao,Ruijia Wang,Ting Xie,Yuchao Qi,Yang Yu,Xue Lv,Shulin Sun
In this paper, PVDF-g-PNIPAAm/GEP-PDA@ZnO composite membranes that can undergo light-induced structural response and photodegradation to achieve self-cleaning have been designed and applied to the separation and purification of dye wastewater. The membranes were prepared by blending graphene (GPE)-polydopamine (PDA)-coated zinc oxide (ZnO) core–shell particles into the PVDF-g-PNIPAAm matrix with a non-solvent induced phase separation technique. The GPE and ZnO are tightly bonded by highly adhesive PDA to form a “strawberry-like” core–shell structure. GPE absorbs light energy and converts it into heat, resulting in changes in PNIPAAm chain segments to expand the pore size for self-cleaning. While the membrane is warming up, GPE further promotes the activation of active groups on the surface of PDA@ZnO at high temperature, resulting in unique and excellent photothermal catalytic activity. As a result, the membrane achieves both self-cleaning and pollutant degradation, which results in an FRR of 99.6% after light cleaning. Moreover, the GPE-PDA@ZnO nanoparticle-modified PVDF-g-PNIPAAm membranes exhibit excellent cycling stability with a degradation flux recovery rate of more than 97% even after multiple UV cleaning. Thus, PVDF-g-PNIPAAm/GPE-PDA@ZnO composite membranes extend the versatility of PVDF-based membranes and show extraordinary potential for application in wastewater treatment.
研究领域:
材料科学
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环境工程
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光催化技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yan Huang,Sixian Chen,Yi Li,Qianbing Lin,Yibo Wu,Qisong Shi
Polyacrylonitrile (PAN) nanofiber-based flexible piezoelectric sensors are recognized for their applicability in wearable electronic devices, personal health monitoring, and motion detection. This research explores the impact of dual fillers, MXene and polydopamine-modified zinc oxide (PDA@ZnO), on the characteristics of PAN-based piezoelectric composite nanofiber films, including planar zigzag conformation content, dielectric, ferroelectric, piezoelectric, and mechanical properties. By integrating PDA@ZnO as a filler, PAN/MXene/PDA@ZnO-5 (PMPO) piezoelectric sensors were developed, showcasing enhanced piezoelectric sensing capabilities. These sensors achieved a sensitivity of 28.56 V/N across a broad linear range, with superior mechanical stability and durability across 3000 loading–unloading cycles, and exhibited swift response and recovery times of 49 ms and 40 ms, respectively. Furthermore, their unique fiber structure and flexibility, when interfaced with the human body, enable the detection of minute physiological movements and the conversion of varied motions into distinct voltage outputs. Thus, these sensors offer considerable promise for applications in human health monitoring and motion posture correction.
研究领域:
材料科学
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纳米技术
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生物医学工程
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可穿戴技术
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产品关联
DOI
高影响因子
TALANTA
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2022
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IF 6.556
Haohua Yang,Xueqi Zhao,Ziwei Zhang,Pinyi Ma,Xinghua Wang,Daqian Song,Ying Sun
SPR is a mature optical biosensor technology for detecting biomolecular interactions without fluorescence or enzyme labeling. In this paper, we acquire a sensitive SPR biosensor based on [email protected] nanomaterial , and the classical sandwich strategy using biotin-streptavidin for secondary signal amplification system was used to detect human IgG (hIgG). Nano-zinc oxide (ZnO) has the dual characteristics of nanocomposite and traditional zinc oxide, with large specific surface area and high chemical activity. Besides, the gold-coated ZnO nanocrystals improve the optical properties of ZnO and enlarge the loading capacity with better biocompatibility. Therefore, a sensing platform based on [email protected] nanomaterial was constructed on gold film modified with mercaptan. Meanwhile, the biotin-avidin system in SPR sensor field has been rapidly developed and applied. Due to the highly selection of streptavidin (SA) and biotin interact with each other, GNRs-SA-biotin-Ab 2 (GSAB-Ab 2 ) were constructed to obtain the secondary enhancement of SPR signal. The influences of experimental conditions were also discussed. With optimal experimental conditions, introducing GSAB-Ab 2 conjugate combined with a sandwich format, the resulting SPR biosensor provides a favourable range for hIgG determination of 0.0375–40 μg mL −1 . The minimum detection concentration of hIgG that can be obtained by this method is approximately 67-fold lower than the conventional SPR sensor based on gold film. The sensitivity of SPR biosensor is significantly improved in a certain range.
研究领域:
生物传感器
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纳米技术
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分析化学
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免疫学
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DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
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2025
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IF 12.5
Jianyu Shao,Huichao Huang,Jinlei Yu,Xiaolin Lan,Wenbo Liu,Zhanhua Huang
An ideal wound dressing should possess excellent biocompatibility, antimicrobial activity, and mechanical robustness. Herein, we report a multifunctional composite hydrogel (HPP) engineered from hemicellulose (HC), polyvinyl alcohol (PVA), and polydopamine-modified zinc oxide nanoparticles (PDA@ZnO NPs), synthesized via a facile one-pot approach followed by borax-mediated dynamic crosslinking and a green freeze-thaw cycling process. The dynamic covalent and hydrogen bonding interactions confer the hydrogel with good mechanical strength, rapid self-healing capability, and tissue adhesion. The incorporation of PDA@ZnO NPs imparts pronounced antimicrobial activity, with inhibition rates exceeding 80 % against both Staphylococcus aureus and Escherichia coli , and enhanced antioxidant capacity, as evidenced by a 69.94 % DPPH radical scavenging efficiency. In vitro assays demonstrate good cytocompatibility, hemocompatibility, and promotion of fibroblast migration, indicating strong potential for wound healing applications. Beyond its biomedical performance, the HPP hydrogel also exhibits strain sensitivity and durability under repeated mechanical deformation, enabling precise monitoring of finger, wrist, arm, and knee joint movements. These results highlight the potential of HPP as a versatile platform for antimicrobial wound dressings and next-generation wearable biosensors.
研究领域:
生物医学工程
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材料科学
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纳米技术
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伤口愈合
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柔性电子
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jinqi Wang,Xiaolong Su,Qianqin Zhu,Yaling Zhai,Xin Dai,Ning Tang,Wangxiang Pan,Hengxue Xiang,Meifang Zhu
An increasing number of hospital-acquired infections (HNIs) confirms the urgency of medical protective fiber material (MDPF), which possesses high strength, low toxicity and excellent hydrophobicity and is considered as an effective method to deal with HNIs. However, the current performance of MDPF mainly relies on a single physical barrier mechanism, and pathogenic and contagious bacteria or virus attached on the surface barrier layer are one of the important paths for secondary infection. Therefore, research on the fabrication of highly effective antibacterial MDPF is of great significance for preventing contagious infections. Herein, high-strength, environment-friendly and antibacterial PE@PDA@ZnO-Ag (PE@PDAZA) nonwoven fabric was successfully prepared through a simple one-pot coating method. The functional fabric exhibits antibacterial rate up to 99.9 % against Escherichia coli ( E. coli ) and Bacillus subtilis ( B. subtilis ) with low amount of antibacterial agent additions. Moreover, the fabric exhibits tested tensile strength of 35.4 ± 2.9 MPa. This work provides a new strategy for preparing high-strength and automatically-protective MDPF, which can reduce hospital-acquired contagious infections through a simple post-treatment process and has great potential for large-scale production.
研究领域:
材料科学
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生物医学工程
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纺织工程
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高分子科学
✓ 已验证
DOI
高影响因子
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