Roughness models for particle adhesion

Eichenlaub, Sean; Gelb, Anne; Beaudoin, Steve

doi:10.1016/j.jcis.2004.08.017

Cited by 103 publications

(54 citation statements)

References 31 publications

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“…On the basis of this model, Cooper et al [351,560] generated computer representations of surface topographies as obtained by AFM imaging by distributions of hemispherical asperities and simulated adhesion forces between these surfaces. In a recent publication [561] rough surfaces were also modeled by fractals and a fast Fourier transform algorithm. The results of the theoretical computations yielded good agreement with adhesion force measurements.…”

Section: Influence Of Roughness On Adhesionmentioning

confidence: 99%

Force measurements with the atomic force microscope: Technique, interpretation and applications

Butt

Cappella

Kappl

2005

Surface Science Reports

3,187

2,949

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Section: Influence Of Roughness On Adhesionmentioning

confidence: 99%

Force measurements with the atomic force microscope: Technique, interpretation and applications

Butt

Cappella

Kappl

2005

Surface Science Reports

3,187

2,949

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“…Silica probable is present all over the fiber, but it is particularly abundant in the protuberances and fibers of the outer epidermis and somewhat less abundant in the inner epidermis adjacent to the rice kernel [13][14][15] . Mechanical interlocking due RH and PCF fibers surface roughness can promote adhesion interaction, mainly of the van der Waals type, between fiber and polymeric matrix 16,17 .…”

Section: Sem Of the Fibersmentioning

confidence: 99%

Characterization of Fibers from Pineapple's Crown, Rice Husks and Cotton Textile Residues

Prado

Spinace

2015

Mat. Res.

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Fibers from pineapple's crown (PCF), rice husks (RH) and cotton textile residues (RTF) were characterized by SEM, X-ray diffraction, FTIR and thermogravimetric analysis. Moisture content, water absorption, density and the distribution of the diameter of the fibers were also evaluated. RTF showed cylindrical microstructure with smooth surface, PCF showed cellular structure and the microstructure of RH is globular, showing cell pattern of the outer surface epidermis which is well organized and has a corrugate structure. PCF and RH showed crystallographic planes of cellulose I and RTF showed a mixture of cellulose I and cellulose II. RTF showed the highest degree of crystallinity and the lower moisture content and water absorption. These results occur because the RTF has no hemicellulose, as verified by FTIR. Comparing the three fibers, the RTF presented the lowest density and diameter. Furthermore, the onset degradation temperature of RTF was 40 °C higher than the PCF and the RH.

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“…The focus of this work is to create nano-scale surface roughness that results in cohesion reduction 21,22 through dry particle coating of nano-additives onto the surface of the carrier particles. Dry particle coating 9 is a novel process to alter the surface properties and/or functionality of fine particles by placing small, nano-size particles on cohesive particle surfaces.…”

Section: Reduction Of Cohesion Force Through Dry Coating Of Nano-addimentioning

confidence: 99%

Fluidization of coated group C powders

et al. 2007

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in Wiley InterScience (www.interscience.wiley.com).While it is well known that flow aids such as fumed silica can be added to improve flowability and fluidizability of cohesive powders, the improvements observed depend on how well the flow aids are blended together with the cohesive powders. In this work, dry particle coating is used to deposit a very small amount of nano-sized particles (as low as 0.01 wt %) with a high degree of precision onto the surface of cohesive, Geldart Group C powders to make them fluidize like Group A powders. A model taking into account the effect of the size of the guest and host particles as well as surface area coverage (SAC) of the coated nano-sized particles is developed to predict the effect of coating on the adhesion reduction of cohesive powders. A series of experiments are performed to investigate the improvement in the fluidizability of dry particle coated Group C powders (e.g., cornstarch and aluminum), and the effect of various parameters such as SAC, guest particle size and host particle size are systematically investigated. The results clearly show the effect of each of these parameters on the fluidization behavior of cohesive powders, and also validate the model. The study also indicates that a critical SAC is required to make the coated cornstarch fluidize, which is about 5%; the smaller the guest size, the better its effect on improved fluidizability, although the improvement is reduced if the guest size is smaller than about 10 nm; and if the conditions regarding the SAC and guest size are satisfied, dry particle coating will significantly improve the fluidization of cohesive particles even as small as 5-10 lm.

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Roughness models for particle adhesion

Cited by 103 publications

References 31 publications

Force measurements with the atomic force microscope: Technique, interpretation and applications

Force measurements with the atomic force microscope: Technique, interpretation and applications

Characterization of Fibers from Pineapple's Crown, Rice Husks and Cotton Textile Residues

Fluidization of coated group C powders

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