ACS Applied Bio Materials
·
2018
·
IF 0
Chunping Su,Huiping Zhao,Hao Yang,Rong Chen
In this work, we developed a facile approach for the fabrication of stearic acid-modified starch/chitosan composite sponge with asymmetric wettability and gradient wettability via mediating the amount of starch. The starch/chitosan composite sponge exhibited heterogeneous wetting properties on its two surfaces after stearic acid modification. The superhydrophobic top surface with a water contact angle of 150° could prevent water, blood, and bacterial permeation without losing the breathability of the sponge, whereas the superhydrophilic bottom surface possessed optimal water and blood absorption and clotting abilities. The asymmetric wettability of starch/chitosan composite sponge was attributed to the synergistic contribution of gradient distribution of starch, rough three-dimensional skeleton structure induced capillary effect and the nonuniform surface distribution of hydrophilic/hydrophobic groups. Furthermore, the sponge also possessed good biodegradability and noncytotoxicity to the human normal hepatocyte. The results indicated that the stearic acid-modified starch/chitosan composite sponge with ideal liquid absorption, vapor transmission rate, self-cleaning and stain-repellent ability could be used as a promising candidate for wound dressing.
研究领域:
材料科学
·
生物医学工程
·
生物医药
✓ 已验证
产品关联
DOI
PubMed
ACS Applied Nano Materials
·
2025
·
IF 5.5
Wenting Kong,Hao Jia,Yan Zhao,Wen Xu
Smart membranes with adjustable superwettability are promising candidates for addressing complex challenges, such as treating oily domestic wastewater and industrial oil leakages. In this study, a durable superhydrophobic coating with switchable wettability was fabricated on a cotton fabric. The coated fabric exhibited a rapid transition to a superhydrophilic/underwater superoleophobic state via a “wetting-displacing” process, and can recover its original superhydrophobicity upon drying. The underwater–oil contact angle was further modulated by adjusting the ratio of the chemical components to the coating thickness. Inspired by the wettability pattern of the Stenocara beetle, an underwater superoleophobic/philic patterned fabric for efficient oi–water separation was developed. The influence of the wettability pattern geometry on the separation efficiency and flux was also investigated. The coated fabric was used to separate multiple types of oil/water mixtures with a separation efficiency of over 99%.
研究领域:
材料科学
·
表面工程
·
环境功能材料
·
分离技术
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
Chen Zhuo,Yu Binqi,Yao Tingfeng,Du Weitong,Ma Jianchao
The wettability and reaction behavior of mold flux with different basicity on TiN and TiO 2 substrates were investigated at up to 1400 °C by the sessile drop method, which can provide a theoretical basis for optimizing the composition of the mold flux for high Ti-bearing steel. As the basicity increased, the mold flux exhibited better wettability and a stronger interfacial reaction with TiN. Thus, it was easier to absorb the TiN inclusion in the order of CaO–SiO 2 -based flux (CS) > CaO–SiO 2 –Al 2 O 3 -based flux (CSA) > CaO–Al 2 O 3 -based flux (CA). Scanning electron microscopy coupled with energy-dispersive spectroscopy showed that the interfacial reaction was also related to basicity. There was a visible and regular interfacial reaction layer between TiN and CS and the CSA flux, which was produced by the redox reaction between the SiO 2 in the slag and the TiN substrate, whereas there was no interfacial reaction layer between TiN and the CA flux. As the basicity decreased, the mold flux exhibited better wettability and a stronger interfacial reaction with TiO 2 ; thus, it was easier to absorb the TiO 2 inclusion in the order of CA > CSA > CS. There was also a visible and regular interfacial reaction layer between TiN and the three fluxes, which was produced by the dissolution of TiO 2 and then reacted with CaO to generate CaTiO 3 .
研究领域:
冶金学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Xiao-Han Wang,Bingyou Jiang,Chunshan Zheng,Gaochao Pan,Shiju Wang,Yi Zhang,Ben Ji
The pore and wetting characteristics of bituminous coal and anthracite treated with different proportions of tetrasodium iminodisuccinate (IDS) and sodium dodecyl sulfate (SDS) were measured. The pore structure characteristics of the coal were studied via low-temperature nitrogen adsorption analysis and the Frenkel-Halsey-Hill fractal theory. Zeta potential measurements were conducted to quantitatively analyze the degree of aggregation or dispersion of coal particles dissolved in solution. Changes in the coal surface morphology were observed and analyzed by scanning electron microscopy (SEM). The results show that when the ratio of IDS:SDS is 1:3, the specific surface area (SSA) values of bituminous coal and anthracite are the lowest. The composite reagent has a greater effect on improving the pore structure of anthracite than bituminous coal. Compared with bituminous coal, anthracite has better pore connectivity and a wider pore network. The absolute zeta potentials of bituminous coal and anthracite reach the maximum at an IDS:SDS ratio of 1:3, with values of 91.08 mV and 91.35 mV, respectively. The electrostatic potential distributions of the molecules show that the advantages of the electrostatic potential difference with water molecules enable IDS and SDS molecules to effectively attract water molecules and form hydrogen bonds, thus revealing the optimization mechanism of coal wettability .
研究领域:
矿物学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Kaiwen Chen,Jianyi Zhu,Yujing Tan,Fengze Sun,Jian Gan,Hui Peng,Tianyi Zhan,Jianxiong Lyu
Conventional preparation of Janus membranes with asymmetric wettability focuses on the preparation of extreme hydrophilic side and hydrophobic side, but suffers from pore clogging, low liquid transfer and collection efficiency and short service life. In this study, Janus wood (JW) with a continuous wettability gradient was created throughunidirectional vacuum impregnation of a hydrophobic solvent after the delignification of wood. Digital image correlation (DIC) and layer-by-layer contact angle assessment were utilized to examine the thickness-dependent wettability gradient of the JW membrane. The JW membrane completed the modification of the cell walls without blocking the cell lumens. The presence of wettability gradient in the JW membrane effectively reduced the capillary force of liquid penetration, resulting in decreased adhesion and stagnation of liquid on the membrane surface, and increased flow rate and transport efficiency. Based on the continuous wettability change of the JW membrane, the JW membrane was endowed with the ability to act as a “unidirectional valve” to enable continuous and rapid directional transport of liquids. The mechanical properties of the JW membrane prepared by the unidirectional introduction method were significantly improved, rendering them highly stable and environmentally durable. The fog collection efficiency of the JW membrane was maintained at 97.7% over 10 repeated use cycles. For light oil/water and heavy oil/water mixtures, JW membrane maintained an efficiency of 99.6% or higher. Unlike conventional surface modification methods, the unidirectional introduction method proved practical and effective for modifying the JW membrane in the thickness direction. Furthermore, the prepared JW membrane was sustainable, inexpensive, durable, and environmentally friendly. This study provides a wide range of potential applications in fields such as droplet manipulation, multi-liquid separation, industrial wastewater purification, and microfluidics.
研究领域:
材料科学
·
环境工程
·
可持续材料
·
界面科学
·
功能材料
·
微流控技术
·
分离科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 20
·12035-12046
·
IF 3.119
Jiahui Zhang,Ying Zhao,Zilu Tian,Jiufu Zhu,Zuosen Shi,Zhanchen Cui,Song Zhu
In this study, we evaluated bioinspired adhesive primers for durable adhesion between dentin and composite resins. N-3,4-Dihydroxyphenethyl methacrylamide (DMA) primer monomer (small bifunctional group molecules containing catechol and acrylic groups at opposite ends) was prepared to mimic the interaction between the catechol group and the mineral interface of marine mussels. The shear bonding strength, microleakage, degree of conversion, contact angle, and compatibility were tested. The shear bond strength was significantly improved, and microleakage was diminished after the application of the DMA primer. However, the degree of conversion was decreased. The wettability of the dentin was enhanced, and the DMA primer showed no negative influence on cell proliferation. The results of this study showed the possibility of using DMA primers in clinical practice. This may provide a new strategy for improving adhesion durability.
研究领域:
牙科学
·
生物材料学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Wenqi Yang,Fuxing Ye
Because the CMAS corrosion and phase transformation at elevated temperatures above 1250 °C have limited the applications of traditional YSZ , the design of novel thermal barrier materials is a hotspot. GdTaO 4 is considered as a type of potential novel thermal barrier material owing to its low thermal conductivity . In this study, the mechanical and thermal properties, CMAS corrosion resistance , and the wettability of the GdTaO 4 were studied and compared with that of YSZ. The results show that the coefficient of thermal expansion and hardness of GdTaO 4 are 14.1 × 10 −6 K −1 (1350 °C) and 534.2 Hv 0.3 respectively. The thickness of CMAS reaction layer of GdTaO 4 is ~30.8 μm after 24 h reaction at 1350 °C, which is thinner than that of YSZ. After corrosion reaction, the CMAS glass aggregated instead of completely disappearing or continuously extending over the surface of GdTaO 4 . The main reaction product is Ca 2 Ta 2 O 7 , and the anorthite phase may not be detected, which is similar to YTaO 4 . By comparison, the dense substrate of YSZ became porous and CMAS glass has disappeared after 10 h. CMAS corrosion at 1350 °C. The on-line contact angle results show that the wettability of CMAS on GdTaO 4 is worse than that on YSZ at 1350 °C, while the opposite of the work of adhesion, which indicates that GdTaO 4 can remove liquid CMAS more easily than YSZ TBCs during the service. Furthermore, the corrosion depth and areas of GdTaO 4 are smaller than those of YSZ in the same situation. These findings suggest that GdTaO 4 possesses better high-temperature properties and CMAS corrosion resistance than YSZ as a kind of potential of thermal barrier material.
研究领域:
材料科学
·
高温材料
·
腐蚀科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Zhangdi Li,Tao Zhang,Mingyou Wang,Fengxian Qiu,Xuejie Yue,Dongya Yang
Due to the variety of oily wastewater and complexity of separation system, it has put forward new challenge and requirement to separation materials for on-demand separation of various oil/water mixtures. Here, we reported a facile waste-to-resource strategy to rationally fabricate hierarchical ZnO nanopillars coating onto the surface of waste brick grains (ZnO/WBG) via simple physical process and in-situ growth technique. Specifically, the directly as-prepared ZnO/WBG possess superhydrophilic/underwater superoleophobic (UWSOB) properties and modified ZnO/WBG by organosilicon reagent possess quasi superhydrophobic/superoleophilic (SHOBI) properties. It is also worth noting that this discrete ZnO/WBG with opposite wettability can be accumulated into ZnO/WBG layer with numerous tortuous channel structure, making it feasible for on-demand separating various oil/water mixtures whether immiscible light- and heavy-oil/water mixtures or oil-in-water and water-in-oil emulsions. It has been demonstrated that the filter layers with opposite wettability exhibit high separation efficiency and flux, excellent chemical stability and admirable recyclability . Thus, this novel and cost-effective ZnO/WBG layer holds great promise for large-scale and versatile oil/water separation. Additionally, this work presents a sustainable perspective of effectively utilizing waste brick to construct workable functionalized materials with tremendous application potential, showing far-reaching value and significance in fundamental research and environmental protection.
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
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2024
·
IF 3.7
Chengwei Xu,Yifu Wang,Yan Yu,Lirong Li
The wettability has an important effect on coalescence performance of filter. In this paper, we utilized a commercial glass fiber filter as the substrate to prepared the Janus filter through dip-coating and electrospraying. The Janus filter exhibited a remarkable reduction in pressure drop, with only 2.8 kPa of wet pressure drop compared to 6.1 kPa for the original filter and 5.4 kPa for the oleophilic filter. Notably, the coating depth played a critical role in enhancing the coalescence performance of the Janus filter. Furthermore, when placing the Janus filter in reverse direction, its quality factor increased by 2.87 times, highlighting that orientation is an essential factor for coalescence performance of Janus filters. The results indicate great potential in the application of Janus filters for coalescence filtration.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Xiaorui Zhang,Lizhu Liu,Jinfeng Li,Ling Weng,Weiwei Cui
TiO 2 –polyester composite emulsions with low contact angle on steel sheet were prepared in a “core-shell” structure employing ultrasonic irradiation. The cluster size of the TiO 2 was reduced and the nano-particles were well dispersed. The molecular weight of the polyester resin initially decreased, then increased forming the characteristic core-shell structure. This was a clear indication that the TiO 2 particles were coated with the recombined polyester as a direct result of the ultrasonic irradiation. The contact angle of the emulsion was reduced which indicated that the wettability of the emulsion was improved without the addition of chemical additives. These results suggest the possibility of producing low contact angle coatings by mechanical way.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Pei Li,Jinchuan Zhang,Reza Rezaee,Wei Dang,Xuan Tang,Haikuan Nie,Shijing Chen
The variation in pore water distribution within gas shale reservoirs has a significant effect on gas content, and thus on resource evaluation. However, the characteristics of water micro-distribution and its effects on pore parameters are still not well understood due to the mixed wettability of shale and the complexity of the pore structure . In this study, six lower Permian transitional shale samples from the southern North China Basin, humidified at four levels up to a relative humidity of 98%, were selected for moisture-equilibrated experiments and low-pressure N 2 gas adsorption measurements. The results indicate that the adsorbed moisture in transitional clay-rich shales can be divided into capillary condensation water in the micropores and monolayer–multilayer adsorbed water in the non-micropores. Moreover, thermal maturity (VR o ), total organic carbon , clay, and carbonate are positively correlated with the adsorbed moisture and micro-/mesopores, indicating that water in shales could be hosted in inorganic pores as well as in organic pores. Furthermore, the distribution of adsorbed moisture is mainly controlled by the VR o , component wettability (i.e., organic matter, clay, pyrite, and carbonate), and pore structure (micro-/mesopore distribution). In addition, a subtle adsorbed moisture may significantly reduce both the pore volume (PV) and specific surface area (SSA) of micropores, and the effect on micropores and SSA is more pronounced than that on the respective non-micropores and PVs. Additionally, the mechanism of clay swelling and pore expansion in clayey shale can provide certain insights for water–methane competitive adsorption, identifying clay type and pore size, and the formation of organo-mineral complexes.
研究领域:
地质学
·
能源科学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Xue Gao,Chaosheng Li,Chengbin Shen
To address water scarcity in arid regions, this study proposes a high-efficiency fog harvesting material development strategy based on wettability gradient regulation. Controllable assembly of polyvinyl chloride nanofibers with bead-on-string structures on hydrophilic substrate surfaces is achieved through a 5 min electrospinning process. The fabricated Janus membrane achieves a contact angle differential of 141°, establishing an asymmetric wetting structure that enables directional droplet transport. Experimental data show that its fog water collection flux is 2.1 times higher than those of traditional hydrophilic materials. Surface water droplets were absorbed by the Janus membrane in only 2 ms, while they were absorbed by the hydrophilic membrane in at least 5 ms. Moreover, after the water droplets were absorbed, the Janus membrane surface can remain in a fresh, dry state, which is conducive to further water absorption. The underlying mechanisms for the enhanced fog harvesting performance were detailed, with numerical simulations used to study the impact of the hydrophilic layer’s wettability on liquid penetration. Such a Janus membrane can be a promising candidate for fog harvesting against the water crisis.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）