Effect of gum arabic on the surface tension and surface dilational rheology of trisiloxane surfactant

Cao, Chong; Zhang, Lu; Zhang, Xiaoxi; Du, Fengpei

doi:10.1016/j.foodhyd.2012.07.006

Cited by 41 publications

(46 citation statements)

References 33 publications

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“…As surface entropy of water is 0.07 mJ/m 2 K, the required surface tension of water at room temperature is known as C = 49.9978 mJ/m 2 . We note that this obtained value is actually below the surface tension of pure water at ambient (72.8 mJ/m 2 ) and is in range with the reported surface tension of NMP [10] and gum Arabic at 3 wt% of concentrations (55 mJ/m 2 ) [33]. Based on this observation, we suggest that the surface tension of water must be within this value prior the sliding of graphite layer.…”

Section: Reduction Of Surface Tension By Gum Arabicsupporting

confidence: 83%

Production of functional graphene by kitchen mixer: mechanism and metric development for in situ measurement of sheet size

et al. 2017

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It has been reported that the production of defect free graphene is possible by the application of a kitchen mixer. Yet, we note that the natural-surfactant role in the exfoliation mechanism by a kitchen mixer has rarely been discussed. To investigate the possibility of graphene exfoliation in a bio-surfactant medium, we have produced graphene from the co-mixing of graphite and gum Arabic. Through the modelling of bulky graphite as a single composite disc, we have shown that the exfoliation of graphite crystal may be possible through rotational motion of graphite surface. In this paper, we also have developed two simple metric systems that were designed from the application of UV spectroscopy for in situ measurement of graphene sheet size after exfoliation step.

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Section: Reduction Of Surface Tension By Gum Arabicsupporting

confidence: 83%

Production of functional graphene by kitchen mixer: mechanism and metric development for in situ measurement of sheet size

et al. 2017

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“…properties for KCGl in the presence of added salts The interfacial dilational moduli versus oscillation frequency for KCGl with NH 4 , TMA , TEA and TPA are characterized in Fig. 4, because the changes of dilational moduli with oscillating frequency further characterize the viscoelasticity of interfacial film 20 . The experiments were carried out by varying the frequency in the range of 0.005 -0.1 Hz.…”

Section: Frequency Dependence Of the Interfacial Dilationalmentioning

confidence: 99%

Effect of Added Tetraalkylammonium Counterions on the Dilational Rheological Behaviors of N-Cocoyl Glycinate

et al. 2020

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Ion specific effect, which was first reported by Hofmeister in 1888 1 , has been reported in tons of systems with charged interfaces or surfaces, including surfactant aggregates, supramolecular structures, enzymes, and polymers over the past several decades 2 5 . Counterions in added salts are an important factor affecting the intermolecular interaction, surface activity, micellization, and aggregate morphological transition of ionic surfactants. Various organic and inorganic counterions are often used because they not only affect the interfacial behaviors of the surfactants, but also affect their self-aggregation structures 6 11 .

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“…In this state, the interface behaves as an insoluble film, resulting in a higher dilational modulus. 41,42 It can also be seen that all interfacial dilational modulus show a similar trend: the dilational modulus decreases significantly with increasing solution concentration. As the concentration of the pesticide solution increases, the tension gradient of the interface film due to the deformation of the interfacial film area will decrease, thereby reducing the interface dilational modulus.…”

Section: The Properties Of Pesticide Solutionsmentioning

confidence: 65%

Efficient pesticide formulation and regulation mechanism for improving the deposition of droplets on the leaves of rice (Oryza sativa L.)

Zheng

Cao

Chen

et al. 2021

Pest Management Science

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BACKGROUND: The effective deposition of pesticide droplets on the target leaf surface is critical for improving the utilization of pesticides. We proposed a new way to enhance the droplet deposition on the target leaf surface by changing the properties of pesticide formulation, and this formulation can be sprayed directly or at a low dilution. In addition, it is a simple method to select a suitable concentration and formulation by evaluating the interfacial dilational rheological properties of pesticide droplets. RESULTS:The wetting behavior of two types of pesticide formulations prepared by oil-based solvent on the rice leaf surface was investigated based on the surface free energy, surface tension, contact angle, adhesion tension, and adhesion work. The interfacial dilational rheological properties of different pesticide solutions were measured as a function of concentration. This study clearly demonstrates the fact that water-in-oil emulsion has a better wettability than oil-in-water emulsion, especially with the increase of the concentration of the solution, the droplets can be wetted and spread faster on the leaves. Compared with vegetable oil (methyl oleate), mineral oil (solvent oil No. 200) has smaller dilational modulus and surface tension, showing excellent wetting properties. CONCLUSION:The water-in-oil emulsion prepared with solvent oil No. 200 has the smallest dilational modulus, and the spray droplets spread rapidly to the maximum wetting area on the rice leaves, which can be used in an ultra-low volume spray. The results provide new insights into how to increase the deposition of droplets on superhydrophobic leaf surfaces by screening formulations and concentrations.

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Effect of gum arabic on the surface tension and surface dilational rheology of trisiloxane surfactant

Cited by 41 publications

References 33 publications

Production of functional graphene by kitchen mixer: mechanism and metric development for in situ measurement of sheet size

Production of functional graphene by kitchen mixer: mechanism and metric development for in situ measurement of sheet size

Effect of Added Tetraalkylammonium Counterions on the Dilational Rheological Behaviors of N-Cocoyl Glycinate

Efficient pesticide formulation and regulation mechanism for improving the deposition of droplets on the leaves of rice (Oryza sativa L.)

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