ACS ES&T Engineering
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2022
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IF 0
Peijin Cheng,Xiaoying Zhu,Weitang Zhu,Xiangyang Xu,Liang Zhu
An anaerobic membrane bioreactor (AnMBR) is a promising technology with the potential for energy, water, and fertilizer recovery in wastewater treatment processes. However, serious biofouling remains to be the main obstacle to future development. In this study, we selected graphene oxide (GO) that owns both defensive (antiadhesive) and offensive (antibacterial) properties as a modification material to regulate the membrane surface. Instead of focusing on the signal property in the current studies, the role of antiadhesive and antibacterial properties’ cooperation in combating biofouling was comprehensively evaluated. Results showed that with better hydrophilicity and antibacterial properties (73% inhibition rate for Staphylococcus aureus), the GO-functionalized membrane significantly inhibited the development of biofilms, resulting in Stage 2 of membrane fouling being widely prolonged (∼2 times). The mechanism analysis of microbiology and thermodynamics has consistently revealed the significant effect and importance of dual-function cooperation: (1) the co-constructed adverse environment for microbes induced a looser biofilm on the membrane surface with a lower filtration resistance, and (2) the changes in the biofilm composition and membrane matrix weakened the adhesion strength between them and then slowed down the formation of biofilms. These findings proved the efficient and long-lasting ability of GO for biofouling mitigation and highlighted the potential of dual-functional materials in AnMBR.
研究领域:
环境科学
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微生物学
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材料科学
✓ 已验证
产品关联
DOI
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Yangkai Xiong,Zhiqiang Fang,Daxiong Hu,Hao Jiang,Lei Huang,Qitong Mao,Guoqing Wang,Jipeng Li,Zhenzhong Liu,Chunxin Ma
Although many antibiofouling materials have been developed based on either bacterial-killing or antiadhesion effects, the integration of both the effects in one material remains challenging for achieving highly enhanced synergistic antibiofouling. In this study, we have explored a nano-CeO2-loaded double-network hydrogel by introducing CeO2 nanorods into a polyzwitterionic hydrogel via a simple one-pot method for achieving highly efficient antifouling. First, the CeO2 nanorods dispersed in the hydrogel, as an outstanding nanozyme, have highly efficient bacterial-killing performance. Second, the superhydrophilic polyzwitterionic hydrogel provides a dense hydrated layer on the surface and subsequently excellent broad-spectrum antiadhesion behavior. Most importantly, the bacterial killing and antiadhesion of this hydrogel can work synergistically to largely improve the marine-antifouling performance. Moreover, the double-network structure of this hydrogel, including the covalently cross-linked polyzwitterion hard network and the physically cross-linked poly(vinyl alcohol) soft network, can provide greatly improved mechanical properties (2.44 MPa of tensile strength reaches and 21.87 MPa of compressive strength). As a result, among the existing marine-antifouling hydrogels, the CeO2-loaded polyzwitterionic double-network hydrogel can achieve outstanding antifouling performance, which can sustain for over 6 months in a real marine environment. This work provides a promising marine-antifouling hydrogel, which will also inspire antifouling research of a new strategy and materials.
研究领域:
材料科学
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海洋生物学
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生物医学工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Congyuan Zhang,Zhanjian Liu,Xiguang Zhang,Chijia Wang,Meiling Li,Ruixia Yuan,Huaiyuan Wang
Superhydrophobic coatings with attractive antifouling, anti-icing, and antiadhesion properties have considerable application potential. However, their instability hinders their large-scale application. In this study, a robust superhydrophobic microcapsule (MC)-based composite fluoroethylene vinyl ether/fluorinated ethylene propylene/carbon nanotubes (CNTs)/microcapsule (MC) coating was fabricated by emulsion polymerization and one-step spraying. Owing to the responsive release of hydroxyl-fluoro silicone oil (HFSO) from MCs and self-lubricating effect of CNTs, the superhydrophobicity of the as-prepared coating was retained after 1000 cycles of abrasion and 7 d of a strong acid/alkali immersion. Moreover, the MC-based superhydrophobic coating exhibited an excellent anti-scaling property under water-flowing conditions, which can be attributed to the cooperative effect of the air film trapped in the uniform micro/nanostructures and the stable lubricant layer formed by the released HFSO. The impact resistance of the MC-based coating was excellent, and its superhydrophobicity was retained even under sand impacting (1100 g), water jetting (338 kPa), and slurry contamination (100 cycles). This study provides a simple and effective approach for fabricating a robust superhydrophpobic coating with self-healing and anti-scaling properties. Further, it paves the way for developing superhydrophobic coatings that can be used in under harsh environments, such as in oil–gas gathering and transferring pipelines.
研究领域:
材料科学
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表面工程
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化学工程
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涂层技术
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2019
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IF 3.45
Xiaofeng Yu,Xin Liu,Xueting Shi,Zhibin Zhang,Haitao Wang,Libang Feng
It is of significance to prepare superhydrophobic surfaces via facile and scalable methodologies for the purpose of practical application. Herein, SiO 2 nanoparticle-based superhydrophobic spray was prepared by a simple and scalable methodology. A variety of superhydrophobic materials were fabricated by facile spraying process consequently. The as-prepared superhydrophobic surfaces exhibit excellent repellent universality. More importantly, the superhydrophobic coatings on substrate surfaces have high transparency and they don’t have adverse impact on light transmission. Meanwhile, the as-prepared superhydrophobic materials show outstanding self-cleaning and anti-adhesion performance, excellent durability and stability upon various harsh conditions as acid, alkali, various solvents, long time of UV irradiation and outdoor placement. In addition, the superhydrophobic fabrics demonstrate excellent ability in oil-water separation with high efficiency. Thereupon, this simple and environment-friendly methodology might be used to prepare high-performance superhydrophobic materials, and it is expected to be applied in a wide range.
研究领域:
材料科学
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表面化学
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纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Dongliang Huo,Fengqian Wang,Fengjuan Yang,Tongyao Lin,Qing Zhong,Sui-Ping Deng,Jingxian Zhang,Shaozao Tan,Langhuan Huang
Implant-associated infections (IAIs) caused by drug-resistant bacteria remain a critical factor in the failure of implant procedures. Therefore, it is urgent to develop an effective anti-infection coating for implant surface modification to prevent IAIs. Herein, an antibacterial and anti-adhesive coating (CMP-Ti) constructed on the surface of titanium implants is reported, formed by the nanomaterial CeO 2 @Mn 3 O 4 NRs (CM NRs) with antibacterial activity and the superhydrophilic polymer polyethylene glycol (PEG). The nanocatalyst CM NRs on the surface of CMP-Ti induce ferroptosis-like death of bacteria by catalyzing the production of hydroxyl radical (•OH) and singlet oxygen ( 1 O 2 ) and the consumption of glutathione (GSH). The superhydrophilic coating of CMP-Ti can effectively prevent adherence of drug-resistant bacteria and avoid biofilm formation. By combining the “active offense” antibacterial mechanism with the “passive defense” anti-adhesion mechanism, CMP-Ti can kill bacteria and inhibit biofilm formation. The results of in vivo studies showed that CMP-Ti effectively prevented implant-associated infections caused by Methicillin-resistant Staphylococcus aureus (MRSA), thus promoting tissue repair and osseointegration. Therefore, this multifunctional coating combining “active offense” and “passive defense” provides a promising way to prevent IAIs caused by drug-resistant bacteria and to promote tissue repair in the future.
研究领域:
生物材料
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生物医学工程
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传染病
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材料科学
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组织工程
✓ 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）