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A Stochastic Study on the wicking Phenomena

Journal of Donghua University(English Edition) 2012年第2期29卷 178-181页

作者：翁鸣 LUKAS David Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of EducationZhejiang Sci-Tech University Faculty of Textile Engineering Technical University of Liberec

A stochastic approach based on a 3D 3-state Potts model combined with Monte Carlo simulation was used to study the equilibrium wicking height of liquids in vertical cylindrical capillaries. The Lifshitz-van der Waals and Lewis acid-base theories were adopted to characterize the apolar and polar interactions in the spin system. The evolution of the spin system was driven by the difference in total energy for two successive states. To verify the model, equilibrium wicking height of water, formamide, heptane, and octane in capillaries of different radii were examined and the corresponding computer simulations were implemented. Good agreement was obtained between the simulation and experimental results. It shows the potential of the proposed approach to be applied in this area.

关键词： Potts model Monte Carlo simulation wicking Lifshitz-van der Waals Lewis acid-base

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Dynamics of wicking

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Journal of Donghua University(English Edition) 2002年第3期19卷 77-79页

作者： Jakub Wiener Tech. Univ. of Liberec Czech Republic

An exponential model is proposed for the description of wicking, which is suitable for describing the whole process of wicking. Results are discussed and verified by the experimental data. Exponential model can be use... 详细信息

关键词： wicking process, capillary, wicking dynamics.

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Mechanism of disintegrant action of polacrilin potassium: Swelling or wicking?

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Acta Pharmaceutica Sinica B 2012年第1期2卷 70-76页

作者： Mrudula Hemant Bele Diliprao Vishramji Derle M.V.P.Samaj’s College of Pharmacy Nashik 422002India

The effect of particle size,pH of medium,and presence of lubricant on the swelling behaviour,water uptake properties and disintegrant performance of polacrilin potassium was examined.Particle size did not affect the bulk swelling of disintegrant particles when measured as settling volume,but increased the water uptake and decreased the disintegration time of tablets containing this disintegrant.An increase in the pH of the medium from acidic to neutral increased the bulk swelling of the particles,whereas it decreased water uptake and disintegrant performance.Addition of lubricant had no effect on settling volume,but decreased the water uptake rate and the disintegrant performance significantly.It is concluded that wicking,i.***.capillary action,rather than swelling,is the major factor that contributes to the disintegration behaviour of polacrilin potassium.

关键词： Polacrilin potassium Disintegrants Mechanism wicking Capillarity Water uptake

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An Experimental Investigation to Examine the wicking Properties of Silk Fabrics

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Journal of Textile Science and Technology 2019年第4期5卷 108-124页

作者： Md Kamrul Hasan Juramirza Kayumov Guocheng Zhu Munna Khatun Asaduzzaman Nur Xinbo Ding School of Materials and Textile Zhejiang Sci-Tech University Hangzhou China

In this research, the wicking characteristics of fabrics were used as an essential and effective indicator to investigate the satisfaction of heat and moisture. Due to the popularization of silk fabrics recently it has become an interesting topic to know about the wicking behavior of silk fabrics in water. The absorptive capability of the silk textile makes clothing comfortable even for a hotter environment. Silk fabrics are comfortable in the summer, and warm in the winter. Silk fabric can usually contain about 11 percent of its weight in moisture but the range varies from 10% to as much as 30%. In this paper, the wicking behavior of silk fabric in both warp and weft directions was investigated in terms of wicking height, wicking rate, mass increase distribution per centimeter of wicking height, the velocity of wicking height, and durability of wicking height after removal of the wicking liquid reservoir. The experimental results show that the wicking height in both the warp and weft directions had a good correlation with the time. The wicking rate was comparable in both weft and warp directions, but at the start of the wicking phase, weft direction wicking was quicker than warp direction. The mass increase in fabric per centimeter of wicking height was inversely proportional to wicking height. The mass of moisture carried in the fabric did not significantly differ in the direction of the weft and warp.

关键词： Silk Fabric wicking Behavior Warp and Weft Direction Rate of wicking Velocity of wicking Durative wicking Height Contact Angle

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Experimental Characterization by Fluorescence of Capillary Flows in the Fiber Tows of Engineering Fabrics

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Open Journal of Inorganic Non 2012年第3期2卷 25-45页

作者： Francois LeBel Amir Ershad Fanaei Edu Ruiz Francois Trochu Department of Mechanical Engineering Ecole Polytechnique de MontrealMontrealCanada

Liquid Composite Molding (LCM) is an increasingly used class of processes to manufacture high performance composites. In LCM, the fibrous reinforcement is first laid in a mold cavity. After closure of the mold or covering of reinforcement with a plastic bag, a polymer resin is either injected or infused under vacuum through the fiber bed. The engineering fabrics commonly used in LCM possess generally dual scale architecture in terms of porosity: microscopic pores exist between the filaments in the fiber tows, while macroscopic pores appear between the tows as a result of the stitching/weaving fabrication process. On a microscopic scale, capillary flows in fiber tows play a major role on the quality of composites made by resin injection through fibrous reinforcements. In order to better understand the mechanisms that govern the impregnation of fibrous reinforcements in LCM, a study of wicking behavior is carried out in fiber tows. The experimental approach is based on capillary rise experiments, which are less expensive and time-consuming than other more standard characterization techniques often used in porous media. In addition, it allows gathering representative data on the wicking properties of fiber tows as a function of their morphological characteristics such as micro-porosity, total cross-section area, specific surface area, filament diameter and packing configuration. The morphological properties of the fiber tows will also be characterized by other standard experimental methods in order to compare with the results obtained by capillary rise experiments. These standard methods include gravimetry for the micro-porosity and fiber mass density, microscopic analysis to measure the filament diameter, cross-section area and packing configuration of the filaments and capillary flow porometry to evaluate the equivalent pore diameter. The capillary rise method has already been used not only in Soil Mechanics, but also to characterize engineering textiles used in high performance composites. Such experiments are no

关键词： Liquid Composite Molding wicking Fiber Tow Lucas-Washburn Model Permeability Sizing

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Influence Factors on the Moisture Transmission of the Pure Polypropylene Knitted Fabrics

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Journal of China Textile University(English Edition) 1999年第1期16卷 23-26页

作者：邱佩芬张佩华

This paper analyses the principle of wicking effect of the polypropylene filament yarn. By means of theoretical and experimental analysis, some factors affecting the moisture transmission of the pure polypropylene kni... 详细信息

关键词： polypropylene knitted fabrics wicking effect moisture transmission.

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