Papers by Keyword: Wicking

Abstract: Sericin is a natural protein which is removed from silk in a process called degumming. In India, 250-300 tons of sericin is extracted per year and goes as waste, it has wide range of application because of its properties like antioxidant, antibacterial, UV resistant, anticoagulant and moisture retention capacity. This paper is concerned with the application of sericin on polyester fabrics using cross linking agents like di-methylol di-hydroxy ethylene urea (DMDHEU) and glutaraldehyde. The Polyester fabrics are pretreated with sodium hydroxide (NaOH) and low temperature plasma (Oxygen gas). This pretreated sericin applied polyester fabrics show the better improvement in the wicking (moistureabsorbency) and good dye uptake properties on acid dyed fabric and it will be used for medical application.

Abstract: We proposed cotton thread as a low cost platform for fabricating size-based cell sorting microfluidic chip. The cells and beads can be wicked through 3D structures of thread via capillary forces without any external forces. However, the major mechanism of capturing cell inside of thread was mechanical entrapment inside the gaps between the fibers. Cells sorting property based on their size was tuned by using multiple threads having different twist per inch (TPI). The fabricated device has 3 different zones from the inlet to the outlet where each zone has a different TPI which means different sizes of gaps. The results showed that small beads were trapped in thread which has more TPI and smaller gaps, while bigger beads were trapped in thread with less TPI and larger gaps. For proof of concept, blood as a complex mixture of cells with wide range of size was wicked into the fabricated device. The result showed efficient separation of red blood cells, white blood cells and plasma. The capability of cotton threads as a proper material for fabrication of size based cell sorting microfluidic devices was proved with higher simplicity and efficiency.

Abstract: People are dissatisfied with quite some towel quality including easy to hardening, fiber loss and poor absorption. To solve the problems, this paper used different towel fabrics to test stiffness, frictional properties, wicking and depilation rate. Then gray analysis method is introduced to evaluate the comprehensive comfort of these towel fabrics. The results show that the contact comfort of Bamboo fiber towel is better than the cotton towel. With the increasing of pile loop, the performance of towels is comfortable.

Abstract: In this study ten commercial smart wound dressings - CombiDerm®, Versiva® XC®, Sorbsan Plus SA, Opsite* Post-Op, Aquacel™ Surgical, DuoDerm®, Granuflex®, Mepilex® Border, Allevyn Gentle Border and Biatain® - were tested and evaluated. The following experimental tests were performed on the dressing specimens; area density, thickness, fluid uptake and handling, conformability, absorption rate, waterproofness, stainless steel (SS) peel test and vertical wicking. It was found that Biatain® had the highest absorbency and fluid handling capacity and also had lower moisture vapour permeability value compared to the other dressings. Versiva® XC® and DuoDerm® had higher extensibility values than other dressings, which are 3.56 machine direction (MD) and 3.99 (CD) cross direction Ncm-1 for Versiva® XC® and 3.67 (MD) - 3.12 (CD) Ncm-1 for DuoDerm®. The pattern of results for permanent set was found to be similar to the extensibility results. All tested dressings passed the waterproofness threshold. DuoDerm® and Granuflex® showed more than 20 minutes rate of absorption and also their SS Peel values were found to be considerably higher than the other dressings investigated.

Abstract: The wicking properties of porous polyester, Coolmax and conventional polyester rotor yarns were tested with the capillary flow of a colored liquid and the height was recorded against the time. The relations of material structure, temperature, and yarn count factors to wicking properties were discussed. Results showed that: the moisture conduction of porous structure yarns were best of all yarns; Higher temperature results the faster of wicking speed, and is especially for porous polyester; The finer Coolmax and conventional polyester rotor yarns are of faster wicking speed, but this rule is not distinct for porous structure polyester.

Abstract: The performance of heat transfer coefficient, wicking and water vapour permeability (WVP) of cotton fabric were tested after adding amino-functional silicone softening agent in simulating process of home laundry. Meanwhile, the experiment of line drying of fabric soaked in water after spinning was designed to study the impact of soft nursing care on drying efficiency of fabric. The result showed that with the amino-functional silicone softening agent added, handle was improved obviously. With the concentration of softening agent increasing, WVP of fabric increased, while heat transfer coefficient had the opposite result. Wicking effect increased slowly at the beginning and decreased sharply later. It was found that soft nursing care improved the drying efficiency.

Abstract: In order to provide the wetting processing and the design of thermal moisture comfort of fabric with micron-scaled pore size data, this paper reports on an experimental investigation on the pore size distribution of 6 kinds of fabrics with the method of seft-proposed weight-classification method. This paper focuses on the effect of fabric structure and component on the pore size distribution . Histograms reveal the relationship between various factors. For cotton fabric, the peak area of the histogram of 1/2 twill weave fabric (TWF) is wider and higher than that of plain weave fabric (PWF) due to fewer structure points and more loose structure. This leads to wicking rate increase. For the polyester fabric, the difference between the peak area shapes of the TWF and PWF is not obvious. This may arise from that smaller warp/weft density of both the samples inhibited by the change in inter-yarn gap leading to the similarity. For polyester-cotton fabric, with the increase in the ratio of hydrophilic cotton component, pore size range significantly expanded, showing more uniform wicking and capillary condensation.