POLYMER SCIENCE SERIES A
·
2021
·Vol. 63
·期 6
·705-711
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IF 1.206
Liu Yena,Seidi Farzad,Song Junlong
Abstract Surface design and engineering is a critical tool to improve the interaction of solid materials with their surroundings. Immobilization of polymeric hydrogels is one of the major strategies to achieve surface modification of solid substrates. Here, we report a simple strategy for tethering hydrophilic layers with anti-fogging and anti-fouling traits on the glass surface by surface-initiated atom transfer radical polymerization. The mixtures of N -acrylamide glycine and N -acrylamide glycinamide with different ratios are utilized for the generation of the hydrogel layer in the absence of any external crosslinking agent. The tethered layers are characterized by XPS, ATR-FTIR, and SEM. By adjusting the acrylamides ratio, layers with high hydrophilicity (contact angle 8°) are achieved. Notably, the modified glasses showed strong anti-fogging and anti-fouling performances. Additionally, the performance of the modified glasses remained almost unchanged after 2 months indicating high stability of the immobilized thin hydrogel layers.
研究领域:
材料科学
·
表面工程
·
高分子化学
✓ 已验证
DOI
高影响因子
WATER RESEARCH
·
2023
·
IF 12.8
Danting Shi,Tengjing Gong,Rui Wang,Weihua Qing,Senlin Shao
Janus membranes with asymmetric wettability have attracted wide attentions for their robust anti-oil-wetting/fouling abilities in membrane distillation (MD). Compared to traditional surface modification approaches, in this study, we provided a new approach which manipulated surfactant-induced wetting to fabricate Janus membrane with a controllable thickness of the hydrophilic layer. The membranes with 10, 20, and 40 μm of wetted layers were obtained by stopping the wetting induced by 40 mg L −1 Triton X-100 ( J = 25 L m −2 h −1 ) at about 15, 40, and 120 s, respectively. Then, the wetted layers were coated using polydopamine (PDA) to fabricate the Janus membranes. The resulting Janus membranes showed no significant change in porosities or pore size distributions compared with the virgin PVDF membrane. These Janus membranes exhibited low in-air water contact angles (< 50°), high underwater oil contact angles (> 145°), and low adhesion with oil droplets. Therefore, they all showed excellent oil-water separation performance with ∼100% rejection and stable flux. The Janus membranes showed no significant decline in flux, but a trade-off existed between the hydrophilic layer thicknesses and the vapor flux. Utilizing membranes with tunable hydrophilic layer thickness, we elucidated the underlying mechanism of such trade-off in mass transfer. Furthermore, the successful modification of membranes with different coatings and in-situ immobilization of silver nanoparticles indicated that this facile modification method is universal and can be further expanded for multifunctional membrane fabrication.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Zekai Mei,Shuting Ma,Shuzhen Ni,Weisheng Yang,Hongqi Dai,Fangong Kong
Recently, there has been significant attention given to the development of oil-water emulsion separation filters made from renewable and inexpensive wood for the separation and purification of oily wastewater. However, the relatively large pore sizes of wood cross-section slices make it challenging to effectively separate emulsified oils (5–20 μm) in wastewater. We propose constructing a dense superhydrophilic layer of Al 3+ -carboxymethyl cellulose on the surface of a wood filter using a dip-coating process for separating oil/water emulsions. The Al 3+ -CMC layer exhibits stable surface superwettability with θ oil > 160° under water, which repels the non-polar oil phase and selectively allows water to pass through. The wood filter optimized for emulsion separation can achieve an efficiency of 96.32 % and a filtration flux of 410 L m −2 h −1 bar −1 . It maintains stable recyclables even after 6 cycles. The Al 3+ -CMC@DW filter shows considerable potential for practical applications in oil/water emulsion separation.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jinyue Chai,Junlei Zheng,Haiting Yu,Fang Chai,Miaomiao Tian
Bisphenol A (BPA) has been widely detected in environmental and human products and has significant health and environmental impacts. Consequently, an innovative molecularly imprinted membrane was fabricated for the selective adsorption of BPA within water environment. Tannic acid (TA), abundant in plants, was employed to effectuate the reduction of AgNO 3 in an environmentally friendly, and gentle manner, imbuing the membrane with antibacterial properties. A functional hydrophilic layer was created utilizing TA and polyimide (PEI), and mild and efficient imprinting was accomplished through dopamine (DA) self-polymerization. Compared with the blank membrane, the contact angle of the molecularly imprinted membranes (PVDF@Ag@P@MIMs) was reduced to 67.62°, and the optimal adsorption capacity was 33.41 mg g −1 . The imprinting factor of the PVDF@Ag@P@MIMs membrane was 2.90, indicating that the membrane could effectively separate BPA. After 6 cycles of utilization, the adsorption loss was only 4.55 %. In addition, the synthesis of PVDF@Ag@P@MIMs is simple and free of pollutants. The experimental results and green synthesis process of the molecularly imprinted membranes indicate that these materials have potential applications in environmental protection, selective separation, chemical industry, and other fields.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zhongke Su,Jie Ren,Su Chen,Chang Liu,Guo-Xing Li
The application of solar interfacial evaporation technology in clean water production has garnered increasing attention in recent years, with thin-film evaporation being considered one of the most efficacious strategies to address the growing demand for high evaporation rates at moderate temperatures. This investigation presents the design of a Janus nanofiber film based on a self-pumping effect, comprising a hydrophobic layer (TPU) and a hydrophilic layer (PVA-(ε-PL)@MXene). This structure creates a self-pumping effect that promotes unidirectional transfer of liquids, effectively increasing water transfer efficiency and evaporation, achieving a maximum evaporation rate of 1.56 kg m–2 h–1 while maintaining 1.52 kg m–2 h–1 after multiple cycles. This Janus nanofiber film exhibits high performance in the 200–2500 nm range, demonstrating strong light absorption with an absorption efficiency of 87.69%, and rapidly increasing from room temperature to 57.8 °C in 3 min under 1 kW m–2. Furthermore, TPU/PVA-(ε-PL)@MXene exhibited substantial antimicrobial activity against E. coli (89.77%) and S. aureus (53.96%), attributed to the inhibitory effect of ε-PL on the biosynthesis of proteins and enzymatic biomolecules.
研究领域:
可再生能源
·
材料科学
·
纳米技术
·
水处理
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太阳能技术
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高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 12
·7967-7976
·
IF 12.732
Bo Ge,Shaowang Tang,Hao Zhang,Wenzhi Li,Min Wang,Guina Ren,Zhaozhu Zhang
In this world, insufficient potable water resources and water pollution exist simultaneously. The photothermal device designed in this paper consists of three components: a superhydrophobic BiOBr photocatalyst layer (SH-Bi sponge), hydrophilic layer (cotton), and photothermal layer (CNTs/Co3O4). The SH-Bi sponge layer designed has two functions: (1) ensuring that the photothermal layer floats on the water surface; (2) removing the surface oil and photodegradation pollutants in sewage. h+ is identified as the main active species by studying the degradation mechanism. Meanwhile, the specific locations of the valence band (1.108 eV) and conduction band (−1.312 eV) of the BiOBr photocatalyst are determined. Local interface heating is realized through the synergistic effect between the hydrophilic layer and photothermal layer. The results demonstrate that the photothermal device has a high steam generation rate and vapour production rate for ordinary water quality and NaCl aqueous solution.
研究领域:
环境科学
·
材料科学
·
水处理
✓ 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）