CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Yajie Wang,Zhiwei Guo,Yujie Yang,Yanxiang Li,Qingchun Guo,Peilin Cui,Wangliang Li
The magnetically responsive anti-fouling nanofiber membrane (MRANM) was fabricated for efficient oil-water emulsion separation, which could be cleaned using oscillating magnetic field. MRANM was prepared by grafting superparamagnetic Fe 3 O 4 nanoparticles onto the surface of electrospun polyacrylonitrile nanofiber membrane (PANM). Compared with PANM, the water contact angle of MRANM decreased from 104° to 0°, indicating that the hydrophilicity of the membrane was significantly improved. For the emulsions of hexadecane, octane and rapeseed oil, the separation efficiency was 98.04%, 96.59% and 92.67%, respectively. After the treatments in oscillating magnetic field, the separation efficiency kept above 95% after 8 times recycling, which indicated that the MRANM had good regenerability and reusability. The as-fabricated membrane with magnetic responsiveness facilitated an effective method for solving the membrane fouling problem during practical applications of separation high viscosity oil-water emulsion.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2025
·
IF 9.7
A-Jun Chang,Chao-Hua Xue,Jiao-Jiao Sun,Meng-Xia Shen,Xiao-Jing Guo,Bing-Ying Liu,Meng-Chen Huang,Jing Li,Hong-Wei Wang
Radiative cooling, as a sustainable and environmentally friendly cooling technology, holds promise for effectively addressing global energy challenges. However, the primary challenge to radiative cooling materials lies in achieving a balance between cooling capacity and application performances, including mechanical strength, durability, and nighttime insulation. In this study, we have successfully developed a hierarchically porous radiative cooling coating using the composite of thermoplastic polyurethane and hydrophobic silica through a scalable phase separation method. This cooling coating can be applied to various common materials in daily life such as polyester, glass, aluminum plates, wood, and paper products. When applied to polyester fabrics, the fabricated hierarchically porous radiative cooling coating (PRCC) demonstrates high solar reflectivity of 92 %, strong infrared emissivity of 95 % with low thermal conductivity of 0.015 W m −1 K −1 , and favorable mechanical properties with a strength of 21.8 MPa, easy-cleaning features, exceptional durability to UV aging and high-temperature exposure. Outdoor testing results showed that the PRCC achieved an average diurnal cooling of 13.4 °C while exhibiting an average nocturnal warming of 1.5 °C. Furthermore, the PRCC maintains outstanding cooling performance even after twelve months of outdoor exposure. This work is expected to promote the long-term application of radiative cooling materials in outdoor settings.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Hengyang Mao,Shouyong Zhou,Shuo Shi,Ailian Xue,Meisheng Li,Jianjian Cai,Yijiang Zhao,Weihong Xing
Membrane technology can minimize spread of viruses in the environment during pandemics, however, its efficiency is highly limited by biofouling. In the current study, a composite membrane composed of commercial membrane material, poly(vinylidene fluoride) (PVDF), and thermo-responsive attapulgite (t-ATP) was developed. The t-ATP was synthesized by surface modification of attapulgite (ATP) nanofiber with poly( N -isopropylacrylamide) (PNIPAM). t-ATP acted as a nucleating seed to expedite crystallization of PVDF and as a hydrophilic modifier to enhance the wetting performance of membrane. The tensile strength, elongation, and permeance of membrane increased with increase in t-ATP content without compromising pore structure. PNIPAM chains in t-ATP were swollen or shrunken with the change in temperature, thus releasing adhesion between membrane and biofoulants. The modified membrane exhibited superior biofouling resistance performance compared with the pristine PVDF membrane owing to the hydrophilic property of t-ATP and the stretchable chains on its surface. Notably, 89% of biofouling on membrane surface was easily removed through a simple temperature-change coupling ultrasonic cleaning process. High performance of the PVDF/t-ATP membrane indicates its potential application for high-efficient biological wastewater treatment.
研究领域:
环境科学
·
材料科学
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zheng Fang,Junfeng Zhang,Xuefeng Yan,Lizhen Hu,Lin Lei,Huiqing Fan,Weijia Wang,Peter Müller-Buschbaum,Qi Zhong
The simultaneous and efficient removal of oleophilic and hydrophilic stains from polyurethane (PU) is realized by combining the easy-cleaning from the hydrophilic thermoresponsive hydrogel coating containing acrylamide (AAm), gum arabic (GA), and (ethylene glycol) methyl ether methacrylate (OEGMA300) P(GA/AAm/OEGMA300) and the self-cleaning from the embedded nonmetallic photocatalyst g-C3N4. Due to the existence of strong hydrogen bonds between the hydroxyl groups in the hybrid hydrogel coating and the hydroxyl/carboxyl groups in the plasma-treated PU, the hybrid hydrogel coating is very stable on PU. Simultaneously, the acrylamide network in the hybrid hydrogel coating enhances its mechanical strength. Because the transition temperature of OEGMA300 is well above the room temperature, the cross-linked coating remains hydrophilic in ambient conditions. Thus, oleophilic stains, such as oil and grease, can be easily removed from the coating surface. In addition, the embedded photocatalyst g-C3N4 in the hybrid hydrogel coating introduces the extra capability of decomposing organic compounds under sunshine, which favors the removal of hydrophilic stains such as dyes and wines. After sunlight illumination and simply rinsing with water, both hydrophilic and oleophilic stains can be easily removed. Moreover, this joint cleaning performance can work for a long time. Even after four consecutive cycles, both the easy-cleaning to oleophilic stains by the hydrophilic hydrogel surface and self-cleaning to the hydrophilic stains by the embedded g-C3N4 remain unchanged.
研究领域:
材料科学
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表面化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Zhigang Li,Mengjie Wei,Ye Zhu,Jingcheng Liu,Wei Wei,Xiaojie Li
Smooth liquid-like surfaces formed by flexible polymer brushes or alkyl monolayers exhibit great potential as easy-cleaning coatings. However, solvent-free, and easily curable coating formulations that are environmentally-friendly, omniphobic, low-cost, and durable liquid-like surfaces are still lacking. This paper reports the synthesis of a polydimethylsiloxane (PDMS) modified silicone resin additive for the preparation of easy-cleaning photocurable liquid-like coatings. A highly-branched silicone resin (MAP) containing PDMS and acrylate groups was synthesized by acid hydrolysis condensation and then added to polyurethane acrylate (PUA) to prepare UV-curable coatings. The coatings with only 1 wt% MAP addition exhibited hydrophobicity and oleophobicity, as well as dust and graffiti resistance due to their low surface tension and the self-migration of PDMS chains in the MAP resin. Meanwhile, the coating surface was smooth, highly transparent, and showed excellent abrasion resistance because the highly-branched structure of MAP was conjugated with many acrylate groups. This enhanced the compatibility of the MAP resin with PUA and strengthened the cross-link density of the coating. Consequently, the photocurable easy-cleaning coating provides a facile strategy for preparing environmentally friendly and mechanically robust anti-smudge coatings.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 23
·3392
·
IF 4.7
Yuansong Ye,Huiping Shi,Yuchi Zhang,Jianrong Xia,Bing-Chiuan Shiu,Run Fang
Urushiol is recognized as a sustainable coating material with superior properties; however, it faces significant challenges in applications such as petrochemicals and marine engineering due to surface oil contamination. This study aimed to enhance the cleanability of urushiol-based coatings through hydrophilic modification. Polyethylene glycol monooleate (PEGMO) was identified as an appropriate hydrophilic macromonomer and utilized as a modifier to develop a novel urushiol-based coating, termed P(U-PEGMO), via thermal curing. The results indicated that copolymerization occurred between urushiol and PEGMO during the curing process, forming a stable urushiol copolymer with favorable compatibility. The incorporation of PEGMO greatly improved the surface hydrophilicity of the coatings, as evidenced by a reduction in the water contact angle to below 30° when the modifier content reached 30% or higher, demonstrating a high degree of surface hydrophilicity. This enhanced property imparted the modified coating with underwater superoleophobicity and reduced oil adhesion, thereby facilitating the removal of oil. The cleaning performance was evaluated using a simple water rinsing method, after which, less than 2.5 wt% of oil residues remained on the surface of the modified coating. The high hydrophilicity is considered responsible for the coating’s easy-cleaning capability. In addition, the modified coatings exhibited improved flexibility and impact resistance, albeit with a slight decrease in hardness.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yahan Ye,Qing Han,Chen Zhao,Wei Ke,Minghui Qiu,Xianfu Chen,Yiqun Fan
Fouling caused by adsorption is a challenge in protein separation and purification using membrane technology. The interaction between the membrane surface and proteins is significant for developing antifouling modified membranes. In this study, a negative ZrO 2 tubular ceramic membrane was constructed by grafting polyacrylic acid (PAA) to mitigate protein fouling. PAA of 2000 Da had little effect on the membrane pore and surface wettability, as characterized by XPS, dextran retention, contact angle, and water permeance. The protein resistance of the modified membrane was investigated by protein filtration. The modified membranes had a higher stable normalized flux (0.6) and flux recovery ratio (90 %) than that of the original membrane. In addition, the performance of the modified membranes was sensitive to the pore sizes of the original membranes. When the original membrane was unable to completely reject bovine serum albumin (BSA), the weak interaction between BSA and the membrane pores would reduce rejection after PAA modification. And the flux recovery ratio of modified membrane increased by 55 %. Overall, PAA modification reduces irreversible fouling by electrostatic repulsion, and improves the protein-resistant and easy-cleaning performance of ceramic membranes.
研究领域:
膜技术
·
蛋白质分离
·
材料科学
✓ 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）