The wetting and interfacial properties of alumina surface treated with dipalmitoylphosphatidylcholine and lipase enzyme

Wiącek, Agnieszka Ewa

doi:10.1016/j.powtec.2011.06.006

Cited by 10 publications

(5 citation statements)

References 48 publications

(90 reference statements)

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“…Table 4 presents the values of surface free energy components of studied silica gel and alumina determined by the thin layer wicking method. The determined surface free energy components of silica gel and alumina are consistent with those obtained by others using the same TLW method [16,17,[43][44][45][46][47][48], thin column wicking method (TCW) [21] and imbibitiondrainage method (ID) [24,25,49] (see Table 5 presenting the literature values of surface free energy components of these adsorbents).…”

Section: Resultssupporting

confidence: 85%

Determination of surface free energy components of organic liquids by the thin layer wicking method

Hołysz

Szcześ

2017

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Using the layer wicking method (TLW method) the electron-donor interactions of surface free energy of the organic liquids: benzene (C6H6), toluene C6H5CH3), and tetrahydrofuran ((CH2)4O) was determined. For this purpose the penetration rate measurements of these liquids in the porous layers of silica gel and alumina were performed. The obtained values of the electron-donor parameter of surface free energy of the studied organic liquids were compared with the literature data obtained by the direct measurement of the interface tensions of water/organic liquids.

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Section: Resultssupporting

confidence: 85%

Determination of surface free energy components of organic liquids by the thin layer wicking method

Hołysz

Szcześ

2017

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“…For the treatment of the data, the refractive index of TiO 2 –P25 was set at n = 2.57 [taking into account a proportion of anatase ( n = 2.561) and rutile ( n = 2.613) in the mixture]. To remove impurities, the cleaning procedure described by Preočanin and Kallay was used as in our previous papers. − After the cleaning procedure the particles were ground in an agate mortar to break aggregates and start from a well-dispersed sample, always with a similar initial macrostructure.…”

Section: Methodsmentioning

confidence: 99%

Physicochemical Characteristics of Chitosan–TiO₂ Biomaterial. 1. Stability and Swelling Properties

Wiącek

Gozdecka

Jurak

2018

Ind. Eng. Chem. Res.

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The surface and electrokinetic properties of chitosan−TiO 2 biomaterial have been investigated. Both carbohydrate polymer and titanium dioxide demonstrate unique physicochemical properties appropriate for biotechnological applications. However, the changing stability of such systems restricts its usage. Improved stability can be controlled by environmental parameters, process conditions, or modifying TiO 2 structure. Antibacterial chitosan was used because its protective barrier can retard ripening, water loss, as well as destruction of products. The concentrations of compounds and solution pH were varied. Static and dynamic light-scattering measurements make evident the relationship between the state of aggregation of the suspensions and the stability. The chitosan−TiO 2 system is characterized by improved physicochemical properties in comparison with base TiO 2 as an effect of electrosteric stability. Stable material was obtained with the precisely selected compounds ratio, proved by Fourier transform infrared spectroscopy methods, which can be developed because of valuable properties of the individual components along with synergistic effects.

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“…Further, the ash compositions of the six coals were comparatively analyzed as shown in Table . SiO 2 and Al 2 O 3 accounted for over 80% of the ash in the normal coals, and the hydrophilicity of these oxides would affect the wettability of the coals. − However, after igneous intrusion, CaO and SiO 2 were dominant in the ash of the altered coals. Besides, the altered coals possessed contents of Fe 2 O 3 , MgO, SO 3 , and MnO 2 that were higher than those of the normal coals, which agreed with the previous literature. , It is worth noting that CaO is distinctly enriched in the altered coals due to the precipitation of calcite, with its contents increasing from 1.21% to 32.24%, from 1.58% to 37.83%, and from 0.61% to 48.78%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Changes in the Surface Structure of Coal Caused by Igneous Intrusions and Their Effect on the Wettability

Shi

Qin

Bi³

et al. 2018

Energy Fuels

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In this paper, normal and thermally altered coals were sampled to investigate the surface characteristic changes of coals after igneous intrusions and their effects on the wettability. The chemical compositions, pore structures, surface morphology, and functional groups of coals after igneous intrusions were comparatively analyzed. A contact angle experiment and wetting time test were employed to analyze the wettability of coals. The results showed that the coals after igneous intrusions exhibited much more epigenetic carbonates and higher ash contents as compared to the normal coals, which would improve the wettability of these coals. Pore structure analysis revealed that the macropore volume and surface roughness of the altered coals were further increased due to igneous intrusions. In addition, the altered coals formed much larger pores and more cracks on their surface, which made these coals more easily wetted by water. XPS analysis revealed decreased contents of oxygen-containing groups after igneous intrusions. The contact angle and wetting time test results indicated that the altered coals demonstrated an improved wettability as compared to the normal coals. This conclusion could be evidenced by a smaller contact angle and shorter wetting time for the altered coals. This paper concluded that the surface structure of bituminous coal was obviously influenced by igneous intrusions, finally enhancing the wettability of the altered coals, which was mainly due to changes in ash contents, minerals, pore structures, and surface morphology.

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The wetting and interfacial properties of alumina surface treated with dipalmitoylphosphatidylcholine and lipase enzyme

Cited by 10 publications

References 48 publications

Determination of surface free energy components of organic liquids by the thin layer wicking method

Determination of surface free energy components of organic liquids by the thin layer wicking method

Physicochemical Characteristics of Chitosan–TiO₂ Biomaterial. 1. Stability and Swelling Properties

Changes in the Surface Structure of Coal Caused by Igneous Intrusions and Their Effect on the Wettability

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The wetting and interfacial properties of alumina surface treated with dipalmitoylphosphatidylcholine and lipase enzyme

Cited by 10 publications

References 48 publications

Determination of surface free energy components of organic liquids by the thin layer wicking method

Determination of surface free energy components of organic liquids by the thin layer wicking method

Physicochemical Characteristics of Chitosan–TiO2 Biomaterial. 1. Stability and Swelling Properties

Changes in the Surface Structure of Coal Caused by Igneous Intrusions and Their Effect on the Wettability

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Product

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Physicochemical Characteristics of Chitosan–TiO₂ Biomaterial. 1. Stability and Swelling Properties