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ادامه مطلب ...
Nanoparticle Finishes Influence on Color Matching of Cotton Fabrics
G. ROSACE1, V. MIGANI1, C. COLLEONI1, M.R. MASSAFRA, E. SANCAKTAROGLU
Abstract
Color change is one of the most important side effects of textile treatments to be considered. This research focuses on color modifications occurring on dyed cotton fabrics due to the nanoparticle sized dendrimer (DWR), dendrimer-fluorocarbon (DWOR) and fluorocarbon (FWOR) finishing. A remarkable influence of finishing onto R (reflectance difference) and E (color difference) of fabrics was observed. Roughness of treated surfaces also plays a relevant role in determining the reflectance and colour changes. In fact, roughness increases the scattering of light thus decreasing surface reflectance. Finishes particle sizes designate the distribution and orientation of surface roughness and the overlay of their absorbance values in the short wavelength results in color differences. Thanks to the nanoparticle size, the highest performances are achieved in some typical textile finishing applications: water and oil repellency induced by finishing on cotton textile and mechanical characteristics of the fabric have been here deeply investigated.
ﺗﺄﺛﻴﺮ ﻧﻮع ﺣﻼل ﺑﺮ ﺗﺪاوم ﻓﺮاﻳﻨﺪ اﻟﻜﺘﺮورﻳﺴﻲ و ﺧﻮاص ﻧﺦ ﺗﻮﻟﻴﺪ ﺷﺪه از ﻧﺎﻧﻮاﻟﻴﺎف ﭘﻠﻲ وﻳﻨﻴﻞ اﻟﻜﻞ
ﻋﻠﻲ اﻛﺒﺮ ﻗﺮهآﻗﺎﺟﻲ ، اﻓﺴﺎﻧﻪ وﻟﻲﭘﻮری، ﺳﻴﺪﻋﺒﺪاﻟﻜﺮﻳﻢ ﺣﺴﻴﻨﻲراوﻧﺪی
ﭼﻜﻴﺪه
ﻧﺎﻧﻮ اﻟﻴﺎف رﺷﺘﻪﻫﺎی ﭘﻠﻴﻤﺮی ﺑﺴﻴﺎر ﻇﺮﻳﻒ، ﺑﺎ ﻗﻄﺮی ﻛﻤﺘﺮ از ﻳﻚ ﻣﻴﻜﺮون ﻫﺴﺘﻨﺪ ﻛﻪ ﻣﺘﺪاوﻟﺘﺮﻳﻦ ﺷﻴﻮهی ﺗﻮﻟﻴـﺪ آﻧﻬـﺎ اﻟﻜﺘﺮورﻳﺴـﻲ ﻣﻲﺑﺎﺷﺪ. ﻳﻜﻲ از ﭘﺘﺎﻧﺴﻴﻞﻫﺎی ﻣﻮﺟﻮد در زﻣﻴﻨﻪی ﺗﻮﻟﻴﺪ و ﻛﺎرﺑﺮد اﻟﻴﺎف ﻧﺎﻧﻮ ﺗﻮﻟﻴﺪ ﻧﺦ از اﻳﻦ اﻟﻴﺎف اﺳﺖ. در ﺻـﻮرت اﻋﻤـﺎل ﺗـﺎب ﺑـﻪ رﻳﺰﻻﻳﻪی ﺣﺎﺻﻞ از اﻟﻜﺘﺮورﻳﺴﻲ ﻣﻲﺗﻮان ﻧﺨﻲ ﺑﺎ ﻇﺮاﻓﺖ زﻳﺎد ﺗﻮﻟﻴﺪ ﻧﻤﻮد . از آﻧﺠﺎﻳﻴﻜﻪ اﻟﻴﺎف ﭘﻠﻲ وﻳﻨﻴﻞ اﻟﻜﻞ زﻳﺴﺖ ﺗﺨﺮﻳـﺐ ﭘـﺬﻳﺮ
ﻫﺴﺘﻨﺪ ، ﻧﺦ ﺗﻮﻟﻴﺪ ﺷﺪه از اﻳﻦ اﻟﻴﺎف ﻣﻲ ﺗﻮاﻧﺪ ﻛﺎرﺑﺮد ﻓﺮاواﻧﻲ در ﺑﺨﺶ ﭘﺰﺷﻜﻲ، از ﺟﻤﻠﻪ ﺑﻪﻛﺎرﮔﻴﺮی ﺑﻪ ﻋﻨﻮان ﻧﺦ ﺑﺨﻴﻪ ﻗﺎﺑـﻞ ﺟـﺬب، اﺳﺘﻔﺎده در اﻧﺘﻘﺎل دارو و ﻣﻮارد ﻣﺘﻌﺪد دﻳﮕﺮی داﺷﺘﻪ ﺑﺎﺷﺪ. در اﻳﻦ ﺗﺤﻘﻴﻖ، ﺑﺎ اﺳﺘﻔﺎده از دو ﻧﺎزل ﻣﻘﺎﺑﻞ ﻫﻢ ﺑﻪ ﺗﻮﻟﻴﺪ ﻧﺦ از ﻧﺎﻧﻮاﻟﻴـﺎف ﭘﻠﻲ وﻳﻨﻴﻞ اﻟﻜﻞ ﭘﺮداﺧﺘﻪ ﺷﺪه اﺳﺖ. ﭘﻴﻮﺳﺘﮕﻲ ﻓﺮاﻳﻨﺪ اﻟﻜﺘﺮورﻳﺴﻲ ﻳﻜﻲ از ﻣﻬﻤﺘﺮﻳﻦ ﻓﺎﻛﺘﻮرﻫﺎی ﺗﺄﺛﻴﺮﮔﺬار در ﺗﻮﻟﻴﺪ ﻧـﺦ از ﻧﺎﻧﻮاﻟﻴـﺎف
ﻣﻲ ﺑﺎﺷﺪ؛ زﻳﺮا ﺗﺄﺛﻴﺮ ﺑﺴﺰاﻳﻲ ﺑﺮ ﭘﻴﻮﺳﺘﮕﻲ ﺗﻮﻟﻴﺪ و ﻛﻴﻔﻴﺖ ﻧﺦ ﺑﻪ ﺧﺼﻮص ﻳﻜﻨﻮاﺧﺘﻲ ﻧﺦ دارد. ﺑﺎ اﺳـﺘﻔﺎده از ﺗﻌـﻮﻳﺾ ﺳﻴﺴـﺘﻢ ﺣـﻼل ﭘﻠﻴﻤﺮ ﭘﻠﻲوﻳﻨﻴﻞاﻟﻜﻞ ﺑﺎ ﺳﻴﺴﺘﻢ ﺣﻼل ﻣﺨﻠﻮط ﭘﻴﻮﺳﺘﮕﻲ ﻓﺮاﻳﻨﺪ ﺗﻮﻟﻴﺪ و ﺧﻮاص ﻧـﺦ ﺑﻬﺒـﻮد داده ﺷـﺪ . ﺣـﻼل ﻫـﺎی ﻣـﻮرد اﺳـﺘﻔﺎده : ﺳﻴﺴﺘﻢ ﺗﻚ ﺣﻼﻟﻲ ﺷﺎﻣﻞ آب، ﺳﻴﺴﺘﻢ ﻫﺎی ﺣﻼل ﻣﺨﻠﻮط ﺷﺎﻣﻞ آب ـ دی ﻣﺘﻴﻞ ﻓﺮﻣﺎﻣﻴﺪ و آب ـ اﺳﻴﺪ اﺳﺘﻴﻚ ﻣﻲ ﺑﺎﺷﻨﺪ. در اداﻣﻪ
ﻣﻮرﻓﻮﻟﻮژی اﻟﻴﺎف، ﺧﻮاص ﻓﻴﺰﻳﻜﻲ و ﻣﻜﺎﻧﻴﻜﻲ ﻧﺦ ﻫﺎی ﭘﻠﻲ وﻳﻨﻴﻞ اﻟﻜﻞ ﺑﺮرﺳﻲ و ﺑﺎ ﻫﻢ ﻣﻘﺎﻳﺴﻪ ﺷﺪه اﻧﺪ .
واژهﻫﺎی ﻛﻠﻴﺪی: ﻧﺦ ﻧﺎﻧﻮﻟﻴﻔﻲ، ﭘﻠﻲ وﻳﻨﻴﻞ اﻟﻜﻞ، ﺣﻼل ﻣﺨﻠﻮط، ﻣﻮرﻓﻮﻟﻮژی اﻟﻴﺎف، ﻳﻜﻨﻮاﺧﺘﻲ .ﻧﺦ
A study on improvement of regenerated nanofiber silk fibroin structure
M. Hasanzadeh, M. Akbari, A. K. Haghi
Abstract
Nanofibers based filter media have some advantages such as lower energy consumption, longer filter life, high filtration
capacity, easier maintenance, lower weight compared to other filter medias. The nanofibers based filter media made up of fibers with diameters ranging from 100 to 1000 nm conveniently produced by electrospinning technique. Typically filter media are produced with a layer of fine fibers that can be used lonely or as a component in a media structure. The fine fiber increases the efficiency of filtration by trapping small particles which increases the overall particulate filtration efficiency of the structure. Improved fine fiber structures have been developed in this study in which a controlled amount of fine fiber is placed on both sides of the media to result in an improvement in filter efficiency and a substantial improvement in lifetime. In this research, regenerated silk fibroin obtained from industrial silk wastes and polyacrylonitrile (PAN) fibers was used to produce filter. Characteristics such as nanofiber orientation distribution and porosity which obtained in lab were examined by Scanning Electron Microscopy (SEM) and analysed using image processing algorithms.
Keywords: electrospinning, nanofilter, image processing, Fourier Transform, orientation distribution function (ODF).
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