FUEL
·
2023
·
IF 7.4
Jianqiang Yin,Hongzheng Zhu,Liang Yuan,Bingyou Jiang,Gaochao Pan,Wenliang Zhu,Qinghui Shi
Using the high-speed motion acquisition system, we studied the adhesion ability and wetting ability of coal dust under the effect of four octanol solutions. The adhesion ability followed the order: 2-Octanol > 4-Octanol > 1-Octanol > 3-Octanol. The wrap angle of coal dust on the octanol surface exhibited an increasing trend with the rise in coal proportion of dust. The observed behavior was substantiated by the interaction force, ascertained through molecular dynamic simulations. The interaction force between coal dust and 3-Octanol was the smallest leading to the weakest adhesion ability by the 3-Octanol solution. The contact angle of octanol solution droplet at the coal dust surface under the same octanol concentration was investigated to follow the order: 2-Octanol > 4-Octanol > 1-Octanol > 3-Octanol. The wetting velocity decreased as the coal proportion of dust increased. The wetting ability followed the order: 2-Octanol < 4-Octanol < 1-Octanol < 3-Octanol. The surface energy of dust increased as the coal proportion decreased. The dedusting efficient under the effect of octanols depended on the difference in surface energy between the coal dust and the octanol solution. The greater the Δ γ (difference between the surface energy of the dust and solution), the weaker the adhesion ability, and the stronger the wetting ability. The findings of our study can offer valuable insights for the development of dedusting reagent design.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Yali Wang,Wenjin Xu,Qinshan Liu,Han Guo,Xiahui Gui,Yaowen Xing
Bubble detachment plays a crucial role in preventing excessive accumulation in gas–liquid reactors and improving the mass transfer efficiency. This study investigates the effect of surface hydrophobicity on bubble detachment induced by coalescence through high-speed dynamic experiments and numerical simulations. The results show that on surfaces with low hydrophobicity (contact angles of 15 and 25°), bubbles detach because the inner contact line contracts relatively slowly, allowing the outer contact line to coalescence quickly. In contrast, on highly hydrophobic surfaces (contact angles of 35 and 45°), the simultaneous contraction of both the inner and outer contact lines prevents bubble jumping. Numerical simulations indicate that low-hydrophobicity surfaces generate sufficient kinetic energy through the pressure gradient. As hydrophobicity increases, some of the energy is dissipated through liquid-film drainage, weakening internal convection and reducing the intensity of the upward flow, which ultimately prevents bubble detachment. Energy analysis further indicates that bubble coalescence shows a weak dependence on the Bo number, while the magnitude of the adhesion energy is the key factor determining bubble jumping. When the adhesion energy exceeds approximately 20% of the released surface energy, the coalesced bubble is unable to detach.
研究领域:
化学工程
·
流体力学
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2025
·Vol. 11
·期 4
·242
·
IF 5.3
Yicheng Zhu,Yichen Zhou,Xing Zhang,Pengju Pan,Jinjun Yang,Chengtao Yu
Ion-conductive gels (ICGs) are essential for achieving human–machine interfaces, bioelectronic applications, or durable wearable sensors. However, traditional solvent-dependent ICGs face bottlenecks such as dehydration-induced failure and challenges in achieving a balance between conductivity and mechanical properties. Here, this work developed a novel ternary ion-conductive xerogel (PEM-Li ICXG) system based on polyethylene glycol (PEG), poly (2-methoxyethyl acrylate) (PMEA), and LiTFSI. PEM-Li ICXGs exhibit high conductivity (2.7 × 10−2S/m), high adhesive capability (0.34 MPa), and solvent-free characteristics. Remarkably, the incorporation of ions into ICXGs simultaneously optimizes their mechanical performance. We demonstrate the application of ICGs in flexible sensors for strain or temperature sensing. The proposed synthesis strategy is straightforward and may further inspire the design of novel high-performance ICXGs.
研究领域:
材料科学
·
生物电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD MICROBIOLOGY
·
2023
·
IF 5.3
Hongchen Zhang,Yujun Zhai,Kewei Chen,Hui Shi
Escherichia coli O157:H7 can recover from sublethally injured (SI) state, which causes threat of foodborne illness . Adhesion plays a key role in the carriage of pathogens in food . In this study, we investigated the adhesion ability of SI and recovered E. coli O157:H7 wildtype and its three pili-deficient mutants (curli, type 1 fimbriae , and type IV pili) on six food-related surfaces. Plate counting was used to determine adhesion population after washing and oscillating the surfaces. Spinach exhibited the stronger adhesion population of E. coli O157:H7 than the other fresh produces (p < 0.05). In addition, at least one key pili dominated adhesion on these surfaces, and curli was always included. The adhesion population and contribution of different types of pili were jointly affected by surface and physiological state. This can be attributed to high hydrophobicity and positive charge density on surface and different expression levels of csgB , fimA , fimC and ppdD in SI and recovered cells. Among glucose, mannose , maltose , fructose, lactose, and sucrose , addition of 0.5% mannose could reduce adhesion of cells at all physiological states on stainless steel. Overall, this research will provide support for controlling adhesion of SI and recovered E. coli O157:H7.
研究领域:
微生物学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Chong Zhang,Huize Cui,Ruilu Guo,Shuo Chen,Wenpeng Li,Yu Han,Shuting Wang,Zhenghong Jiang,Xiaoliang Zeng,Rong Sun
Although intense efforts have been devoted to the development of thermally conductive epoxy resin composites, most previous works ignore the importance of the contact thermal resistance between epoxy resin composites and mating surfaces. Here, we report on epoxy resin/hexagonal boron nitride (h-BN) composites, which show low contact thermal resistance with the contacting surface by tuning adhesion energy. We found that adhesion energy increases with increasing the ratio of soybean-based epoxy resin/amino silicone oil and h-BN contents. The adhesion energy has a negative correlation with the contact thermal resistance; that is, enhancing the adhesion energy will lead to reduced contact thermal resistance. The contact thermal conductance increases with the h-BN contents and is low to 0.025 mm2·K/W for the epoxy resin/60 wt % h-BN composites, which is consistent with the theoretically calculated value. By investigating the wettability and chain dynamics of the epoxy resin/h-BN composites, we confirm that the low contact thermal resistance stems from the increased intermolecular interaction between the epoxy resin chains. The present study provides a practical approach for the development of epoxy resin composites with enhanced thermal conductivity and reduced contact thermal resistance, aiming for effective thermal management of electronics.
研究领域:
材料科学
·
热工程
·
复合材料
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Yan L. Tian,Yue C. Zhao,Cheng J. Yang,Fu J. Wang,Xian P. Liu,Xiu B. Jing
In this paper, micro/nano-scale structures were fabricated on nitinol alloy (NiTi) to realize tunable anisotropic wetting and high adhesive capability. Laser texturing and silanization process are utilized to change the morphological and chemical properties of substrates. It is noted that these treated substrates exhibit the joint characteristics of anisotropic wetting and high adhesive capability. In order to investigate the influences of laser-texturing and silanization processes on NiTi, these surfaces were evaluated using scanning electron microscope (SEM), a white light confocal microscope , X-ray photoelectron spectroscopy (XPS) and goniometer . The relationship between water volume and anisotropic wetting was also established. From the experimental testing, we can obtain the following conclusions: (1) the anisotropic wetting characterized by the difference between the water contact angles (WCAs) in the vertical and parallel directions ranges from 0° to 20.3°, which is far more than the value of natural rice leaves. (2) the water sliding angles (WSAs) kept stable at 180°, successfully mimicking the adhesive ability of rose petals. (3) the silanization process could strengthen the hydrophobicity but weaken anisotropic wetting. These bio-inspired NiTi surfaces have a tremendous potential applications such as microfluidic devices , bio-mimetic materials fabrication and lab on chip.
研究领域:
材料科学
·
仿生学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Technological Sciences
·
2023
·Vol. 66
·期 9
·2681-2695
·
IF 4.6
Du JingJing,Nie ZhaoJun,Yu Hui,Xu JianXiong,Xu LiJian,Chen Qiang
Up to now, it is always a delicate and challenging task to clean and protect Xuan paper ink painting. Xuan paper is composed of cellulose with a rough surface and easy to absorb dust, which leads to poor cleaning effect and irreversible damage in traditional cleaning process. Hydrogel is one of the most effective tools to clean the artworks. However, in the practice of cleaning Xuan paper, most hydrogels cannot achieve fine cleaning result due to the interfacial adhesion issues. Herein, to protectively and effectively clean Xuan paper, using physical yet strong poly(vinyl alcohol)/poly( N -(2-hydroxyethyl) acrylamide) (PVA/PHEAA) hydrogel with suitable stiffness as the model, the interfacial adhesion between hydrogel and Xuan paper was systematically investigated, and various technologies were used to evaluate the cleaning effect. A critical interfacial adhesive energy (< 4 J/m 2 ) is found to achieve the protective and effective cleaning purpose. To the best of our knowledge, this is the first report to estimate the adhesion of hydrogel on the cleaning of paper artwork, which will provide a new viewport in the conservation practice.
研究领域:
材料科学
·
保护科学
·
高分子科学
·
文化遗产保护
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Si-Wei Chen,Peng Lu,Ze-Yong Zhao,Cong Deng,Yu-Zhong Wang
Achieving strong and tough adhesion is a great challenge due to simultaneous requirement of strength and ductility, and meanwhile permanent adhesives for the resistance against high debonding forces are facing difficulties in removing from the substrate and recycling. Herein, we report citric acid-based polyamide hot melt adhesives (PAHMAs) with tailor-made tough adhesion, which were synthesized by melt polymerization of citrate polyamide and polyethylene glycol (PEG). The resulting PAHMAs simultaneously attained the adhesion strength of 4.5 MPa and work of debonding of 2382 N/m, achieving strong and tough adhesion of different substrates such as glass, steel, etc. By adjusting the citric acid enhanced noncovalent interactions and the energy-dissipating role of soft phase PEG, the adhesion strength using PAHMAs can be tailored from strong to strong and tough in the strength range of 1.5–10.8 MPa. Roles of multiple hydrogen-bonds (H-bonds) for high adhesion strength and flexible chains PEG for dispersing energy in debonding were discussed deeply. Interestingly, PAHMAs also display stable cycle adhesion capability due to the dynamic crosslinking feature of H-bonds, maintaining high adhesion strength after 4th cycle. Additionally, the PAHMAs exhibit strong fluorescence in the case of no traditional chromophore groups, showing the fluorescent anti-counterfeiting application value. Design of dynamic crosslinking and long energy-dissipating chains may open up new thoughts of recyclable multifunctional strong and tough polyamide adhesives.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Zhichuan Shen,Hongjian Wen,Hongjun Zhou,Li Hao,Huayao Chen,Xinhua Zhou
Mesoporous silica nanoparticle (MSN) is a novel vehicle to deliver pesticide. MSN can be modified with different chemical groups to increase its interaction with pesticides. In this study, polydopamine-modified mesoporous silica (MSN-PDA) was prepared through a one-pot method with the addition of dopamine (DA). Copper ions, zinc ions, and iron ions were impregnated on MSN-PDA. In addition, avermectin (AVM) was used as the model drug. We investigated the materials' structure, adsorption and release behaviors, anti-UV properties, as well as their adhesive capability, especially the bridge effect of metal ions, π-π stacking of PDA and electrostatic interaction. The results demonstrated that the above materials possessed spherical morphology with surface areas from 635.833 to 1048.960 m 2 /g. Except for the zinc ions, the complexation with copper and iron ions not only enhanced materials' UV resistance but also increased their adsorption rate and the loading amount of AVM from 133 mg/g to 248 and 243 mg/g, respectively. At pH 3, 7, and 10, the bridge effect of the metal ions demonstrated a cumulative release rate using MSN-PDA not over 30% for AVM in 180 h, while the cumulative release rate for MSN reached its 50% in 60, 90, and 50 h under different pH values, respectively. We further demonstrated that the adhesive effect of PDA could be decreased by metal ions.
研究领域:
材料科学
·
化学
·
农药递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 10
·期 5
·757-764
·
IF 6.331
Wanglong Zhang,Yiwei Zhang,Yu Dai,Fan Xia,Xiaojin Zhang
Strong hydrogel adhesion requires the synergy of adhesion and cohesion. Gradient adhesive–tough hydrogels can balance adhesion and cohesion, however, their construction is still a challenging task. Here, we used ethylenediaminetetraacetic acid (EDTA) on-side coordination-induced diffusion chelating Ca2+ to form an adhesive surface in a polyacrylamide/alginate–calcium (PAAm/Alg–Ca2+) tough hydrogel as a facile method for the construction of gradient adhesive–tough hydrogels. The adhesion energy of a gradient adhesive–tough hydrogel to skin is increased by 128% compared with PAAm/Alg–Ca2+ tough hydrogels and the elongation at break is two times higher than that of PAAm/Alg hydrogels. In addition, gradient adhesive–tough hydrogels also exhibit wide linear sensitivity (the gauge factor (GF) = 0.196 (0% < ε < 400%); GF = 0.260 (400% < ε < 650%)) as a wearable strain sensor to monitor human motions. This work provides a versatile strategy for the design of gradient adhesive–tough hydrogels and also provides a practical model for the development of wearable strain sensors.
研究领域:
材料科学
·
生物医学工程
·
可穿戴技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Zhenxiang Pan,Bizhen Zeng,Hongjun Lin,Jiaheng Teng,Hanmin Zhang,Huachang Hong,Meijia Zhang
While transparent exopolymer particles (TEP) has high fouling potential, its underlying fouling mechanisms have not yet been well revealed. In current work, fouling characteristics of TEP under different Ca 2+ concentrations (0 to 1.5 mM) were investigated. TEP quantification and filtration tests showed that TEP contents increased with Ca 2+ concentration, while TEP's specific filtration resistance (SFR) under the influence of Ca 2+ concentration presented a unimodal pattern. The peak of TEP's SFR reached at Ca 2+ concentration of 1 mM when SA concentration was 0.3 g·L −1 . A series of characterizations suggested that microstructure transformation of TEP particles was the main contributor to the resistance variations of TEP solution. The optical microscope observation showed that above and below the critical Ca 2+ concentration (1 mM when SA concentration is 0.3 g·L −1 in this study), the formed TEP existed in the form of c-TEP (average particle size is 0.24 μm) and p-TEP (average particle size is 1.05 μm), respectively. Thermodynamic analysis showed that the adhesion ability of c-TEP (−249,989 and − 303,692 kT) was more than 19 times than that of p-TEP (−12,905 kT), which would accelerate foulant layer formation. In addition, below the critical value, the increased SFR with Ca 2+ concentration could be explained by integrating Flory-Huggins lattice theory with the preferential intermolecular coordination. Above the critical value, the decreased SFR can be attributed to the formation of a “large-size crack structure” cake layer from the p-TEP. This study revealed fundamental mechanisms of membrane fouling caused by TEP, greatly deepening understanding of TEP fouling, and facilitating to development of effective fouling control strategies.
研究领域:
环境科学
·
水处理
·
膜技术
·
热力学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2020
·
IF 4.231
Jia-Nan Zhang,Hengwei Zhu,Tianqi Liu,Yuanyuan Chen,Chen Jiao,Changcheng He,Huiliang Wang
The adhesion of hydrogels has drawn rapidly growing attention due to its wide potential applications. However, currently reported hydrogel adhesion methods are mostly complex and usually with low adhesion strength . Here we report a convenient and versatile method to achieve strong adhesion of hydrogels. By using negatively charged polyacrylic acid (PAA) and positively charged polyethyleneimine (PEI) as adhesives, strong adhesion is formed between the two hydrogels mainly through electrostatic interactions . Moreover, the adhesion energy can be further enhanced by the pre-complexation of PAA with Fe 3+ at a proper pH (3.0). It's worth noting that the highest adhesion energy of 2178 J/m 2 can be obtained after 10 days' setting. Additionally, the adhesion method enables multiple repeatable adhesion of hydrogels with 87% highly adhesion efficiency after three peeling off-rejoining cycles. This adhesion method can also be applied to the adhesion of other types of hydrogels and adhering hydrogels to other solid materials.
研究领域:
材料科学
·
化学工程
·
生物医学工程
✓ 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）