JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Qianyun Tan,Shuying Pu,Guangyu Zhu,Chunxiao Yin,Gege Zhang,Zhongyao Zhang,Min Wu,Yong Tan,Fa-Qian Liu
Marine biofouling is one of the biggest problems for titanium alloys and rutile TiO 2 coatings in marine engineering applications. Hydrogel materials are a novel and environmentally benign antifouling strategy, but they cannot be stabilized on alloy surfaces to provide long-term protection. Focusing on the challenges of bonding at the hydrogel-alloy interface, a PAA/PHEMA composite hydrogel containing Cu 2 O@PEG powder was strongly bonded to the titanium alloy by forming chemical bonds with APTES. The composite hydrogel still achieves an adhesion strength of 60–70 kPa after 7 days of immersion. The samples maintained a stable copper ion leaching rate of 2.61–3.76 μg·cm −2 ·d −1 after 21 days of immersion. The coating-modified titanium alloys showed a 100 % bactericidal rate within three hours of contact with different bacteria and exhibited a high anti-algal adhesion rate of up to 99 %. In addition, the attachment mode of APTES on rutile TiO 2 was clarified for the first time by Density Functional Theory (DFT) calculations. According to DFT calculations, the adsorption energy of APTES on Ti-TiO 2 is −747.025 kJ/mol, and the adsorption energy of acrylic acid on TiO 2 -APTES is −535.152 kJ/mol. The chemical bonding connection between the hydrogel-alloy interface, as a novel interface bonding strategy, would be expected to broaden the application of titanium alloy in marine engineering.
研究领域:
材料科学
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海洋工程
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表面化学
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计算化学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2024
·
IF 4.4
Jiayi Gan,Jie Zhou,Yusong Xu,Tao Zhang,Xianming Zhang
Waterborne polyurethane (WPU) has promising application prospects in paints and coatings owing to its low volatile organic compounds (VOCs), excellent abrasion resistance, and mechanical properties. However, WPU is highly flammable, and there is a high demand for its antibacterial properties in practical applications. To date, effectively suppressing melt dripping remains a challenge during combustion and imparts a high antibacterial property to WPU without compromising the inherent mechanical property. Herein, we report WPU composites on the basis of a Cu(II)–phytate–aromatic Schiff base complex prepared from an aromatic Schiff base derivative, copper(II) acetate, and green and renewable phytic acid. The resultant WPU composites achieved a limiting oxygen index (LOI) of 27.5%. In the UL-94 test, they achieve a UL-94 V-0 rating with no molten droplets and self-extinguish within 1 s after the first and second flame applications. Meanwhile, smoke emission is effectively inhibited in the cone calorimetry test. Moreover, the WPU composites exhibit a killing rate of 99.9% against Staphylococcus aureus and Escherichia coli and excellent tensile toughness, providing a useful reference for designing and fabricating flame-retardant and antibacterial WPU composites.
研究领域:
材料科学
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化学工程
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高分子材料
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燃烧与防火
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抗菌材料
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产品关联
DOI
高影响因子
ACS Omega
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2025
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IF 4.3
Jianbin Zhen,Aimin Sun,Long Yang,Rui Wang,Mengna Liu,Yanjun Liu,Wei Zhang
Due to the hierarchical alignment of cellulose fibrils, cotton fabrics used in clothing possess excellent moisture and thermal management properties. However, this property can retain sweat and sebum secreted from human skin, which may harbor harmful microorganisms and affect human health. In addition, the abuse of antibiotics leads to the emergence of drug-resistant pathogens and cross infections, which require new strategies and antibacterial materials to control this situation. In this study, we constructed a new kind of antibacterial fabric (C-Arg@Ag) by integrating polyarginines (poly-Arg) and silver nanoparticles (AgNPs) onto the surface of cotton fabrics. The results of XPS and SEM showed that poly-Arg was covalently anchored to cotton fabrics via free-radical polymerization, and AgNPs were tightly attached to the surface of cotton fibers through coordination bonds with amine groups of poly-Arg. Biological assays revealed that C-Arg@Ag possessed potent antibacterial activity, with bactericidal rates rapidly reaching about 90% within 4 h, and the bactericidal rate increased with the incubation time. Fluorescence staining showed that the membrane structure of bacteria was severely damaged, indicating that C-Arg@Ag did not easily induce drug resistance. More importantly, C-Arg@Ag was highly firm and durable, with its bactericidal rate remaining at about 80% even after washing 50 times. Furthermore, the synergistic antibacterial method of polyarginine complexed AgNPs and covalent anchoring strategy fabricate C-Arg@Ag not only possessed negligible cytotoxicity and high hygroscopicity but also had little effect on the tensile strength of cotton fabrics. The findings highlight the potential application of C-Arg@Ag in biomedical textiles.
研究领域:
材料科学
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纳米技术
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抗菌研究
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纺织工程
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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
DESALINATION
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2019
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IF 6.035
Shuya Li,Baoyu Gao,Yang Wang,Bo Jin,Qinyan Yue,Zhining Wang
The development of thin film nanocomposite (TFN) reverse osmosis (RO) membranes has promoted the membrane technology for desalination . Novel nanocomposites are urgently being explored to develop superior performance TFN RO membranes. Graphene oxide quantum dots (GOQD) is considered to be an ideal nanofiller for improving membrane permeability due to its rich hydrophilic groups , uniform dispersion and small nanosheet shape. As a silver ion (Ag + ) compound, silver phosphate (AP) possesses higher bactericidal effect than silver particle in membrane application. Accordingly, we synthesized the multifunctional nanocomposite of AP loaded GOQD by a facile electrostatically driven method. Subsequently, GOQD/AP was embedded into the dense polyamide (PA) layer via interfacial polymerization reaction. The GOQD/AP incorporated TFN membrane possessed a high flux of 39.6 L·m −2 ·h −1 at 16 bar, which was 1.5-fold higher than that of the pristine TFC membrane. Meanwhile, the salt rejection was maintained at 98.4%. Noteworthy, the TFN-GOQD/AP membrane exhibited strong bactericidal property against E. coli with a sterilization rate of 99.9% and good stability as well as excellent antifouling performance during RO process. This work provides a feasible strategy to prepare high permselective and anti-bacterial TFN RO membranes for desalination and wastewater reclamation .
研究领域:
膜技术
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材料科学
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环境工程
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水处理
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DOI
高影响因子
Royal Society Open Science
·
2024
·Vol. 11
·期 6
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IF 2.9
Ze Liu,Nan Zheng,Jie Liu,Bo Jia,Xiaojun Wang,Pan Yao,Yayu Zhang,Fu Xia,Xinyu Guo
Marine biological fouling is a widespread phenomenon encountered by various oceanic ships and naval vessels, resulting in enormous economic losses. Herein, novel 4,5-dichloro-2-octyl-isothiazolone@sodium alginate/chitosan microcapsules (DCOIT@ALG/CS) were prepared through composite gel method using DCOIT as core materials, ALG and CS as shells, and CaCl2 as the cross-linking agent. The formed microcapsules (MCs) with Ag nanoparticles (AgNPs) were then filled in UV-curable polysiloxane (UV-PDMS), followed by UV irradiation to yield UV-PDMS/microcapsules/AgNPs (UV-PDMS/MCs/Ag) composite coatings. The constructed micro–nano dual-scale surface using the MCs and AgNPs improved the antifouling and antibacterial properties of UV-PDMS/MCs/Ag coatings. The as-obtained UV-PDMS/MCs/Ag coatings exhibited a static contact angle of about 160°, shear strength of 2.24 MPa, tensile strength of 3.32 MPa and elongation at break of 212%. The synergistic bacteriostatic effects of DCOIT and AgNPs in UV-PDMS/MCs/Ag coatings resulted in a bactericidal rate of 200 μg ml−1 towards Escherichia coli and Staphylococcus aureus with saturation at 100% within 10 min. In sum, the proposed composite coatings look promising for future marine transportation, pipeline networks and undersea facilities.
研究领域:
材料科学
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海洋技术
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化学工程
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生物技术
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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
Wenze Wang,Yiya Ping,Liang Zhang,Jianxing Feng,Wentao Zhang,Jing Sun,Jianlong Wang
To address the microbial spoilage of perishable products, this study developed an advanced multi-modal antibacterial packaging solution that combines bacterial capture and visible light-driven photothermal synergistic photodynamic antibacterial effects to effectively control microbial growth and prolong preservation. By innovatively combining curcumin-loaded porous hollow carbon spheres with a chitosan matrix, a composite film has been created that demonstrates exceptional visible light utilization performance through the integration of the following innovative characteristics: (i) enhanced electron dynamics that reduce the recombination of photo-generated electrons and holes; (ii) broadened absorption and reflective properties of PHC to maximize visible light utilization; (iii) improved carrier functionality that mitigates the tendency of curcumin to aggregate in water; and (iv) the excellent bacterial capture efficiency of chitosan for the short-range effectiveness of reactive oxygen species. The system achieved a high sterilization rate (99.9 %) after a short treatment with visible light (10 min) and effectively extended the shelf life of kumquats to 27 days. Furthermore, the low hemolysis rate (≤2.0 %) and high 3T3 cell viability (≥ 86 %) demonstrated the biosafety, laying the foundation for the practical application. Above all, the composite film holds great promise as a microbial control barrier, capable of efficiently utilizing visible light for antibacterial preservation of perishable products.
研究领域:
食品科学
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材料科学
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生物技术
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微生物学
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光动力疗法
✓ 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）