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Li D, Wang H, Manica R, Zhang Z, Zhang H, Liu Q. Quantifying Contributions of Different Repulsion to Film Drainage Time during the Bubble-Solid Surface Attachment and Implications for the Flotation of Fine Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10281-10292. [PMID: 38687814 DOI: 10.1021/acs.langmuir.4c00839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
The flotation recovery of fine particles faces serious challenges due to the lack of kinetic energy required for supporting their radial displacement and attachment with bubbles. Generally, the hydrodynamic resistance and repulsive disjoining pressure successively inhibit the liquid outflow intervening between the bubble and solid surfaces. To quantitatively characterize the influence of the main repulsion on film thinning time, experiments have been designed in three different aqueous systems. Bubble surface mobility closely associated with hydrodynamic resistance was determined by the rising bubble technique, and the DLVO theory was employed to confirm the evolution of electrostatic repulsion. The film drainage process was then measured based on the high-speed microscopic interferometry. Furthermore, the influence of the main repulsion on bubble-solid surface interactions was examined by flotation recovery. Results show that the earlier buildup of hydrodynamic force ran through the whole film thinning process, and under immobile conditions, the central region gradually became dominant in film thinning due to the very limited fluid flow at the thinnest rim position. Therefore, to achieve the identical film thickness (∼100 nm), the large hydrodynamic resistance could prolong the film thinning time by about 1 order of magnitude, compared with that induced by electrostatic repulsion, which accounts for the increased flotation recovery by 10% using mobile bubbles. This study not only enhances the understanding of how typical repulsive forces work in film drainage dynamics but also opens up an avenue for enhancing flotation and avoiding wasting resources by modulating bubble surface mobility and thus micro/nanoscale fluid flow.
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Affiliation(s)
- Danlong Li
- School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
- Future Technology School, Shenzhen Technology University, Shenzhen 518118, China
| | - Hainan Wang
- School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Rogerio Manica
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Zhaokun Zhang
- School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Haijun Zhang
- School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Qingxia Liu
- School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
- Future Technology School, Shenzhen Technology University, Shenzhen 518118, China
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
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Abali S, Aydin YA. Silanization of sepiolite with various silane coupling agents for enhancing oil uptake capacity. SEP SCI TECHNOL 2022. [DOI: 10.1080/01496395.2022.2138434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Sinem Abali
- Faculty of Engineering, Chemical Engineering Department, Marmara University, Istanbul, Turkey
- Quality Control and Assurance Department, Banat Fırça ve Plastik San. A.Ş, Istanbul, Turkey
| | - Yasar Andelib Aydin
- Faculty of Engineering, Chemical Engineering Department, Marmara University, Istanbul, Turkey
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Lee JU, Hong JY. Comparison of Surface Modification Methods for Improving the Compatibility of Recycled Plastic Film-Based Aggregates. Polymers (Basel) 2021; 13:polym13223956. [PMID: 34833255 PMCID: PMC8621811 DOI: 10.3390/polym13223956] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/12/2021] [Accepted: 11/14/2021] [Indexed: 11/24/2022] Open
Abstract
The surface modification of recycled plastic film-based aggregates was investigated to improve the compatibility between the aggregates and a cement paste. Surface modification was performed using ultraviolet–ozone treatment (UV-O3), a silane coupling agent, O2 atmospheric pressure plasma, and acrylic binder coating methods. The surface properties of the modified aggregates were analyzed using a contact angle measuring instrument. The results revealed that for all surface modification methods, the contact angle decreased with an increase in the treatment time. According to the comparative evaluation results of the changes in the surface characteristics of the aggregates through various surface modification methods, the contact angle reduction rates were 58.9%, 51.4%, 25.5%, and 24.5% for the O2 atmospheric pressure plasma, the acrylic binder coating, the silane coupling agent, and the UV-O3 method, respectively. After 48 h, the contact angle had increased by 110.9%, 29.9%, 16.4%, and 5.9% for the O2 atmospheric pressure plasma, UV-O3, the silane coupling agent, and the acrylic binder coating, respectively. Namely, the surface modification using the acrylic binder coating method was found to be the most effective method in terms of the wettability increase effect and the long-term storage stability.
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Affiliation(s)
- Jea Uk Lee
- Department of Advanced Materials Engineering for Information & Electronics, Kyung Hee University, Yongin-si 17104, Gyeonggi-do, Korea;
| | - Jin-Yong Hong
- Center for C1 Gas & Carbon Convergent Research, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Korea
- Correspondence: ; Tel.: +82-42-860-7591
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BENLİ B, GÖNÜL E. Functionalized Sepiolitic Clay Nanofibers as a Natural Ingredient in Medical Cosmetics. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2021. [DOI: 10.18596/jotcsa.847163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Abstract
In this paper, a new type of porous ceramics was prepared using the raw sepiolite mineral. The porous ceramics was shaped by the dry pressing method and sintered in the range of 700 ~ 1200 °C. The temperature-microstructure evolution and the properties of porous sepiolite ceramics were investigated by thermo gravimetric and differential thermal analyses (TG-DTA), X-ray diffraction (XRD), bending strength, compressive strength, scanning electron microscopy (SEM) and mercury intrusion porosimeter (MIP). The sintering kinetics of the porous ceramics from sepiolite was investigated by means of stepwise isothermal dilatometry (SID). The mechanical properties improved with the increasing sintering temperature, and the bending strength and compression strength reached a maximum of 52 MPa and 32 MPa respectively at 1200 °C. The porosity increased with the sintering temperature until 1100 °C attaining the value of 55.40% and then decreased to a value of 46.48% at 1200 °C. The main crystal phases of the porous ceramics were akermanite and diopside. At 1200 °C, the pores inside the ceramics basically follows a unimodal distribution, which was mainly located near 553 nm. The sintering activation energy of porous sepiolite ceramics was measured by step isothermal thermal expansion with a value of 791.42 kJ/mol in the range of 1000 °C to 1200 °C.
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Influence of Multiple Factors on the Wettability and Surface Free Energy of Leaf Surface. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9030593] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The wettability of plant leaves directly reflects leaf hydrophilicity, which is the key factor that influences the adhesion of liquid pesticide as well as affects plant protection products (PPP) efficacy. Generally, the wettability of leaf surface is quantified by the contact angle and surface free energy (SFE), which are mainly dependent on leaf surface properties, liquid properties and other spraying parameters. Therefore, the aim of this paper was to investigate the SFE of rice and rape leaves with the variation of leaf status, leaf surface, and probe liquid as well as the influence of droplet falling height, solid surface, and PPP concentration on the wettability. The results showed that: (1) the dispersive components of SFE of rice and rape account for a large proportion which are closely related to their hydrophobicity—the abaxial of rape new leaf and the adaxial of rape old leaf are easier to wet comparing with rice and rape leaves in other statuses; (2) the increase of droplet falling height had a significant effect on improving the wettability between wax surface and adjuvant solution, while it had little improving effect on the wettability between wax surface and water; (3) the wettability of different solid surface varied greatly, and the order of wettability from good to bad is water-sensitive paper (WSP), wax, rape leaf, and rice leaf; (4) the effect of PPP concentration on the leaf surface wettability is significant, the contact angle decreased with the increase of PPP concentration, and the wettability of microemulsion is better than that of suspending agent and wettable powder. In conclusion, the SFE and wettability of crop leaf surface determine the suitable type of PPP, studying the influence of multiple factors on leaf surface wettability can provide a reliable reference for providing scientific guidance as well as improving the effective utilization of PPP.
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Tian L, Wang L, Wang K, Zhang Y, Liang J, Zhang Y. The sintering kinetics of shellfish porcelain reinforced by sepiolite nanofibres. ROYAL SOCIETY OPEN SCIENCE 2018; 5:180483. [PMID: 30473813 PMCID: PMC6227942 DOI: 10.1098/rsos.180483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 09/18/2018] [Indexed: 06/09/2023]
Abstract
The work investigated the effect of sepiolite nanofibres on mechanical properties and sintering behaviour of shellfish porcelain. Samples of shellfish porcelain reinforced by sepiolite nanofibres were fired in an electric furnace at 1150, 1200 and 1250°C for a period of 80, 100, 120 and 140 min. Sintered samples were characterized by flexural strength, fracture toughness, scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The results showed that 2 wt% sepiolite nanofibres could increase the flexural strength and fracture toughness of the porcelain bodies through the fibre pullout and the weak interface mechanisms. Sintering activation energies were determined according to the linear shrinkage results. It is found that the liquid-phase sintering mechanism of shellfish porcelain with sepiolite nanofibres is a diffusion mechanism. Porcelain without sepiolite is controlled by volume diffusion, and eventually, the grain boundary diffusion began to appear with the increase of sepiolite addition.
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Affiliation(s)
- Li Tian
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, People's Republic of China
- Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Lijuan Wang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, People's Republic of China
- Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Kailei Wang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, People's Republic of China
- Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Yuedan Zhang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, People's Republic of China
- Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Jinsheng Liang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin 300130, People's Republic of China
- Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, People's Republic of China
| | - Yi Zhang
- Hunan Key Laboratory of Mineral Materials and Application, Central South University, Changsha 410083, People's Republic of China
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Wang Y, Cao Y, Li G, Liao Y, Xing Y, Gui X. Combined effect of chemical composition and spreading velocity of collector on flotation performance of oxidized coal. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2017.09.047] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pan-On S, Rujivipat S, Ounaroon A, Tiyaboonchai W. Development and characterization of clay facial mask containing turmeric extract solid dispersion. Drug Dev Ind Pharm 2017; 44:590-597. [DOI: 10.1080/03639045.2017.1405434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Suchiwa Pan-On
- Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand
- The Center of Excellence for Innovation in Chemistry (PERCH-CIC), Commission on Higher Education, Ministry of Education, Bangkok, Thailand
| | - Soravoot Rujivipat
- Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand
| | - Anan Ounaroon
- Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand
| | - Waree Tiyaboonchai
- Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand
- The Center of Excellence for Innovation in Chemistry (PERCH-CIC), Commission on Higher Education, Ministry of Education, Bangkok, Thailand
- The Center of Excellence in Medical Biotechnology, Naresuan University, Phitsanulok, Thailand
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Khiabani N, Bahramian A, Chen P, Pourafshary P, Goddard W, Ejtehadi M. Calcium chloride adsorption at liquid-liquid interfaces: A molecular dynamics simulation study. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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A molecular dynamics investigation into the adsorption behavior inside {001} kaolinite and {1014} calcite nano-scale channels: the case with confined hydrocarbon liquid, acid gases, and water. APPLIED NANOSCIENCE 2017. [DOI: 10.1007/s13204-017-0563-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Muthu S, Childress A, Brant J. Propagation-of-uncertainty from contact angle and streaming potential measurements to XDLVO model assessments of membrane–colloid interactions. J Colloid Interface Sci 2014; 428:191-8. [DOI: 10.1016/j.jcis.2014.04.052] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 04/01/2014] [Accepted: 04/24/2014] [Indexed: 11/17/2022]
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Karataş D, Tekin A, Çelik MS. Adsorption of quaternary amine surfactants and their penetration into the intracrystalline cavities of sepiolite. NEW J CHEM 2013. [DOI: 10.1039/c3nj00752a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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