SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Hongai Zheng,Xiqian Zheng,Meilin Zhu,Cunzheng Xiao,Mengyao Li,Daquan Zhang,Lizhi Zhang
Modification of membranes is an effective method for degrading organic pollutants and alleviating membrane fouling. In this study, CuO-Fe 3 C-C catalyst was prepared by high-temperature pyrolysis. The membrane modified by CuO- Fe 3 C-C was prepared by vacuum filtration. The bacteriostatic rate of the modified membrane can reach to 96.8 %. Compared to the pristine membrane, the pure water flux of the modified membrane increased from 223.43 L m −2 h −1 bar −1 to 422.27 L m −2 h −1 bar −1 , the flux recovery ratio (FRR) of modified membranes increased from 39.7 % to 79.25 %. Removal rate of TC (Tetracycline) by modified membrane activated PMS can reach to 90.75 %. After 5 cycles, the degradation efficiency of modified membranes was still 83.77 %, which was only 6.39 % lower than that of the first cycle. Free radical quenching experiments and ESR tests explored the possible catalysis and antifouling mechanisms of the modified membrane system, the results showed main active species were SO 4 − •, OH•, O 2 − • and 1 O 2 . This study prepared membranes with excellent antifouling properties, providing a theoretical reference for alleviating membrane fouling in membrane-based water treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
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2021
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IF 3.515
Yang Lechen,Wu Yan,Yang Feng,Wang Wenhao
As one of the most sustainable resources, wood has been widely used in the fields of construction, decoration, flooring and furniture. However, the micron-scale porous structure of wood makes it have strong moisture absorption capacity and is susceptible to bacterial adhesion. In order to expand its utility in more applications of wood products, it is necessary to make the wood have a certain antibacterial and waterproof properties. This study demonstrates a method of using hexadecyltrimethoxysilane and nano-titanium dioxide to prepare antibacterial and waterproof coating and apply it to wood surfaces. Studies have shown that this kind of wood coated with an antibacterial waterproof coating has excellent antibacterial properties (antibacterial rate as high as 99%) and waterproof properties. In addition, this antibacterial and waterproof coating does not cause a major change in the color of the wood, and at the same time increase the tensile strength and hardness to a certain extent. The above-mentioned properties of this antibacterial and waterproof coating provide a new idea for the preparation of wood coatings.
研究领域:
材料科学
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化学工程
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木材科学与技术
✓ 已验证
DOI
高影响因子
Bio-Design and Manufacturing
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2020
·Vol. 3
·期 4
·373-382
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IF 4.095
Xuan Chengkai,Liu Xuemin,Lai Chen,Shi Xuetao
There is a consensus that the prevention of wound infection should be achieved in the following ways: (1) closing the wound to protect it from extra infection; (2) an antibacterial agent that could kill endogenous bacteria. However, existing bulk two-dimensional antibacterial materials show inefficient adhesion to wounds with complex morphology and thus cause the prevention of wound closure. Reducing the thickness of bulk two-dimensional materials to less than 100 nanometres endows them with great flexibility, which could allow them to adhere to wounds with complex morphology by only physical adhesion. Herein, a broad-spectrum and efficient antimicrobial peptide (AMP) was introduced to biocompatible methacrylated gelatine (GelMA) with multiple modification sites, which served as an inner antibacterial layer. After being combined with a biodegradable and good mechanical poly-l-lactide (PLLA) outer layer through plasma-treatment-assisted spin coating, we finally constructed bilayered antibacterial nanosheets with a thickness of approximately 80 nm. These bilayered nanosheets possess good adhesion to surfaces with complex topography and thus achieve better wound closure than other bulk two-dimensional materials. Moreover, this AMP-grafted conjugation shows minimal cytotoxicity compared with Ag + antibacterial agents, and the antibacterial rate of nanosheets is dependent on the graft rate of AMP. We suggest that this bilayered antibacterial nanosheet might be an advanced anti-infection dressing for wound treatment in clinical settings.
研究领域:
材料科学
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生物医学工程
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纳米技术
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伤口愈合
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
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2023
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IF 3.8
Xiaoyu Zhang,Shengping Li,Yueqing Deng,Zengjie Zuo,Zhiming Sun,Chunquan Li,Shuilin Zheng
Staphylococcus aureus ( S. aureus ) is one of the culprits responsible for hazardous wound infections and food contamination, and unrestrained antibiotic use has led to its widespread drug resistance. To tackle this issue, kaolinite (KAO) was modified with benzalkonium chloride (BAC) by a dry modification process to produce a material (BAC/KAO) that exhibits “rapid + persistent” bactericidal ability, coupled with organic compatibility. A “win-win” system between BAC and KAO was designed so that KAO increases BAC’s thermal stability while ensuring a proper release of BAC through an appropriate binding force. The modification of BAC provides KAO with antibacterial efficacy and enhances its organic compatibility. BAC/KAO has a minimum inhibitory concentration of 23.44 mg/L and an antibacterial rate of 92.61% against S. aureus . BAC/KAO is advantageous as it can rapidly kill over 60% of bacteria within the first 10 min and continue to inactivate the remaining bacteria, making it more desirable for practical applications. During the antibacterial process, both the released and unreleased BAC can inactivate S. aureus by interacting with its surface. Meanwhile, in vitro cytotoxicity assays confirm the potential of BAC/KAO for safe application. Furthermore, 30 wt% of doped BAC/KAO remains evenly dispersed in the poly(vinyl alcohol) film, resulting in an 11.295 mm inhibition zone. Therefore, BAC/KAO exhibits excellent promise as an alternative to antibiotics and for manufacturing antibacterial films for food packaging and wound dressings to combat S. aureus infection.
研究领域:
材料科学
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生物技术
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微生物学
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药学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
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2018
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IF 2.082
Xiaoman Han,Guihua Meng,Qian Wang,Lin Cui,Hao Wang,Jianning Wu,Zhiyong Liu,Xuhong Guo
All kinds of commercially available wound dressings are clinically used as fleshly obstacles and therapeutic materials in opposition to microbial incursion. Few researches focused on effective-bleeding and anti-bacteria at the same time. In order to better solve this problem, two hydrogels were synthetized in this study. One is phosphate buffer solution-activated dopamine-modified-γ-poly glutamic acid (PBS-PD) hydrogel, the other one is cirsium setosum extracts-activated dopamine-modified-γ-poly glutamic acid (CSE-PD) hydrogel. The two hydrogels are prepared by applying an enzyme-catalyzed crosslinking means in the presence of horseradish peroxidase (HRP) and hydrogen peroxide (H2O2). The chemical structures were characterized through 1H-NMR and FT-IR. In conclusion, both PBS-PD and CSE-PD hydrogels exhibit superior tissue adhesion properties, and remarkable anti-infection quality. In addition, these two hydrogels manifest prominent hemostatic efficiency. The bio adhesion performance can achieve 30 kPa, meanwhile the CSE-PD hydrogels show good germicidal properties, and the antibacterial rate can reach 98%. The hydrogels could reduce blood loss without any obvious side effect, and present a new prospect in the field of hemostasis rapidly.
研究领域:
材料科学
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生物医学工程
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药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Hongjin Wang,Shuangqing Zhou,Tao Wang,Zhiye Zhou,Yanggen Huang,Stephan Handschuh-Wang,Hongyu Li,Ying Zhao,Yongbing Tang
Long-term exposition of electrodes to aqueous media inevitably results in biofouling and adhesion of bacteria, reducing the electrolysis efficiency of electrodes for water treatment. To ensure technically efficient antifouling of materials for durable electrodes, hierarchical micro-/nano structured boron-doped diamond (BDD) electrodes were designed and synthesized. Multi-level structured BDD was coated on titanium mesh by a bottom-up strategy, based on a combination of self-assembly seeding and hot filament chemical vapor deposition (HFCVD) growth. The morphology of the BDD coating can be controlled by manipulating the seeding density and boron doping concentration. The designed micro/nano hierarchical structure of the BDD electrode suppressed bacterial adhesion greatly and exhibited excellent anti-biofouling efficiency with an antibacterial rate of ∼ 93 %, which entails simplified self-cleaning and durable BDD-coated electrodes. The BDD-coated electrodes were employed to electrochemically treat Escherichia coli -contaminated water, killing virtually all bacteria (≥99.9 %) in 1 min. Finally, real river water was electrochemically treated, reducing the chemical oxygen demand (COD) down to 5 mg/L in 4 h. The excellent performance shows the great potential of the structured BDD electrodes for long-term water purification .
研究领域:
材料科学
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环境工程
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电化学
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水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Gansheng Liu,Christine N. Matindi,Zhiyou Pu,Sania Kadanyo,Zhenyu Cui,Jianhua Yang,Jianxin Li
Zwitterionic polysulfone (PSf) ultrafiltration membranes were fabricated by non-solvent phase separation (NIPS) method. Herein, a casting solution at 45 °C was developed by using chloromethylated polysulfone (CMPSf), N, N-dimethylacetamide (DMAc) as a solvent, 4-amino-benzenesulfonic acid monosodium salt (ABS) as a cross-linking agent, and Na 2 CO 3 as an acid binder. Simultaneously, the occurrence of the electrophilic substitution reaction between ABS and CMPSf caused the formation of ABS grafting CMPSf (CMPSf-g-ABS). After a specific reaction time, the casting solution was applied to cast membranes, which were subsequently submerged in coagulation bath. A zwitterionic ultrafiltration (ZUF) membrane was obtained using NIPS following the treatment of hydrochloric acid (HCl) solution (1 M mol). Because of the formation of cross-linked CMPSf-g-ABS, the results revealed that the casting solution's viscosity increased sharply from 425.4 mPa s at the initial stage (0 h) to 4810.8 mPa s (22 h). Interestingly, the morphology of the membranes with an asymmetric finger-like structure at 0 h gradually transformed to a gradient sponge-like structure after 22 h. Specifically, the ZUF membrane (M22-H) with the gel fraction of 72.1% procured after the reaction of 22 h demonstrated a low water contact angle (40.17°) and a high pure water permeance (420.4 L m −2 h −1 bar −1 ). The M22-H also exhibited a high flux recovery rate (FRR) (90.2%), bovine serum albumin (BSA) rejection (>95%), and Escherichia coli ( E. coli ) antibacterial rate (96.2%). The surface of the ZUF membrane with numerous zwitterionic groups enhances the hydration layer's energy (i region <16 nm) and creates a thick hydration layer (ii region >16 nm), causing a significant improvement in the antifouling performance. This research opens new avenues for preparing zwitterionic functional membranes.
研究领域:
材料科学
·
膜技术
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环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）