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RISS 인기검색어
- 검색키워드
- 저자 : Adnan Mazari (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Performance Characterization of Compression Socks at Ankle Portion under Multiple Mechanical Impacts
Hafiz Faisal Siddique,Adnan Ahmed Mazari,Antonin Havelka,Zdenek KUS 한국섬유공학회 2019 Fibers and polymers Vol.20 No.5
The aim of this research is to investigate how performance of compression socks is deteriorated due to expectedinduced wearing mechanical impacts. Wearing mechanical impacts influence the durability parameters i.e. tensile energyloss, extent of pressure deterioration and dimensional deformation. This research is comprised of two parts; 1): Comparisonof unwashed and hand washed cut-strips for tensile energy and dimensional deformation. For tensile energy loss, cut-stripsamples were-interacted to constant rate of loading and un-loading, cyclic-loading upto 15th cycles for ±5 mm extension(considering muscles expansion and relaxation) and were dwelled (stayed) for 3 minutes at 25 %, 50 % and 75 % extensionlevels, simultaneously. As a second part 2); Three levels (1st, 2nd and 3rd) of gradual intensive machine washes wereperformed to quantify the extent of deterioration of compression pressure, worn alternatively on a fixed sized plastic leg,using KIKUHIME pressure measuring device. Dimensional deformation due to hand washing while dimensional recovery;immediately after pressure measurement (after Pr.), and a-day-later after pressure measurement (dL Pr.) was compared andstatistically analyzed. Statistical validation of second part was performed by introducing measures of correlation, p-value(≤ 0.05), R-square values using MINITAB 17 software.
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Performance Characterization and Pressure Prediction of Compression Socks
Hafiz Faisal Siddique,Adnan Ahmed Mazari,Antonin Havelka,Zdenek KUS 한국섬유공학회 2020 Fibers and polymers Vol.21 No.3
Objective of the current research is to develop the mathematical model for the prediction of compression pressureby incorporating some of new but missing variables; circumferential aspect of leg (Lc) and socks (Sc), true stress (σT), true/logarithm strain (εT), true modulus of elasticity (ET), deformed width (Wf) at b ankle position. Socks samples were purchased,hand washed, donned, marked, sliced to loops and then cut to rectangular strips to obtain force-elongation curve at differentextensions context to practical elongation. Additionally, all samples were evaluated to analyze the influnce of multiplemachinewashes as well as for identification of most influential fabric parameter on compresson pressure, statistically. Standard sized wooden leg (S9=24 cm) attached with pneumatic based sensors (Salzmann MST MK IV) to medial side wasused. Force-extension diagram was obtained using Testometric tensile tester. Mathematical models were developed on thebasis of principle of Laplace’s law. Developed two models were analyzed and comapred with two existing recently developedmodels statitistically using MINTAB 17 software.
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Adsorption Kinetics of Acid Red on Activated Carbon Web Prepared from Acrylic Fibrous Waste
M. Salman Naeem,Saima Javed,Vijay Baheti,Jakub Wiener,M. Usman Javed,Syed Zameer Ul Hassan,Adnan Mazari,Jawad Naeem 한국섬유공학회 2018 Fibers and polymers Vol.19 No.1
In this work, activated carbon (AC) web was prepared using physical activation under the layer of charcoal in high temperature furnace. The carbonization of acrylic fibrous waste was performed at different temperatures (800 ℃, 1000 ℃, and 1200 ℃) with heating rate of 300 oC/h and at different holding time. At 1200 ℃, the heating rate of 300 ℃/h and no holding time provided better results of surface area as compared to carbonization at 800 ℃ and 1000 ℃. The activated carbonweb (AC) prepared at 1200 oC was used for removal of Acid Red 27 dye from aqueous media by varying different parameters like initial concentration of dye, stirring speed, adsorbent dosage, and pH. The results were evaluated using non-linear forms of Langmuir and Freundlich isotherms. The Freundlich isotherm was found to describe the results more effectively because of non-homogenous surface of activated carbon web. Further, the kinetics of adsorption was examined using linear and nonlinearforms of pseudo 1st order and pseudo 2nd order.
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