مهندسی نساجی گیلان:. گیل تکس

سایت تخصصی نساجی و پوشاک

مهندسی نساجی گیلان:. گیل تکس

سایت تخصصی نساجی و پوشاک

ﺑﻬﺒﻮد آﺑﺪوﺳﺘﻲ دارﺑﺴﺖ ﻧﺎﻧﻮالیاف پلی ﻛﺎﭘﺮوﻻﻛﺘﻮن ﺟﻬﺖ ﻛﺎر

ﺑﻬﺒﻮد آﺑﺪوﺳﺘﻲ دارﺑﺴﺖ ﻧﺎﻧﻮالیاف پلی ﻛﺎﭘﺮوﻻﻛﺘﻮن ﺟﻬﺖ ﻛﺎرﺑﺮد در ﻣﻬﻨﺪﺳﻲ ﺑﺎﻓﺖ ﺳﻠﻮﻟﻬﺎ ی ﻋﺼﺒﻲ
 ﻻﻟﻪ ﻗﺎﺳﻤﻲ ﻣﺒﺎرﻛﻪ ، ﻣﻮﻻﻣﺎ ﭘﺮﺑﻬﺎﻛﺎران، ﻣﺤﻤﺪ ﻣﺮﺷﺪ ، ﻋﻠﻲ زادﻫﻮش  ، ﻣﺤﻤﺪ ﺣﺴﻴﻦ ﻧﺼﺮ اﺻﻔﻬﺎﻧﻲ
، ﺳﻴﺮام  راﻣﺎﻛﺮﻳﺸﻨﺎ


ﭼﻜﻴﺪه
ﻣﻬﻨﺪﺳﻲ ﺑﺎﻓﺖ ﻋﻠﻤﻲ ﭼﻨﺪ ﻣﻨﻈﻮره اﺳﺖ ﻛﻪ ﻋﻠﻮم ﻣﻬﻨﺪﺳﻲ و ﭘﺰﺷﻜﻲ را ﺑﻪ ﻳﻜﺪﻳﮕﺮ ارﺗﺒﺎط ﻣﻲدﻫﺪ . ﺳﻠﻮل،دارﺑﺴﺖ و ﺷﺮاﻳﻂ ﻛﺸﺖ ﺳﻠﻮل از ﻋﻨﺎﺻﺮ ﻣﻬﻢ در ﻣﻬﻨﺪﺳﻲ ﺑﺎﻓﺖ ﻣﻲﺑﺎﺷﻨﺪ . ﺑﻪ ﻣﻨﻈﻮر اﻳﺠﺎد ﻳﻚ دارﺑﺴﺖ اﻳﺪه آل ﻛﻪ ﺑﻌﻨﻮان ﻣﺎﺗﺮﻳﻜﺲ ﺧﺎرج ﺳﻠﻮﻟﻲ ﻃﺒﻴﻌﻲ در ﻣﻬﻨﺪﺳﻲ ﺑﺎﻓﺖ ﺑﻪ ﻛﺎر ﮔﺮﻓﺘﻪ ﺷﻮد ﻣﻬﻢ اﺳﺖ ﻛﻪ اﺑﻌﺎد ﻣﺎﺗﺮﻳﻜﺲ ﺧﺎرج ﺳﻠﻮﻟﻲ ﻃﺒﻴﻌﻲ ﺗﻘﻠﻴﺪ ﺷﻮد . اﺟﺰای ﺗﺸﻜﻴﻞ دﻫﻨﺪه ﻣﺎﺗﺮﻳﻜﺲ ﺧﺎرج ﺳﻠﻮﻟﻲ در ﺑﺪن دارای اﺑﻌﺎدی در ﺣﺪ ﻧﺎﻧﻮﻣﺘﺮ ﻣﻲﺑﺎﺷﺪ و ﺑﻬﻤﻴﻦ دﻟﻴﻞ دارﺑﺴﺘﻬﺎی ﻧﺎﻧﻮاﻟﻴﺎف اﻫﻤﻴﺖ زﻳﺎدی دارﻧﺪ. ﭘﻠﻲﻛﺎﭘﺮوﻻﻛﺘﻮن ﻳﻚ ﭘﻠﻴﻤﺮ آﻟﻴﻔﺎﺗﻴﻚ ﺧﻄﻲ اﺳﺖ ﻛﻪ ﺑ ﻪ ﻣﻴﺰان زﻳﺎدی در ﻣﻬﻨﺪﺳﻲ ﺑﺎﻓﺖ ﺑﻪ ﻛﺎر ﮔﺮﻓﺘﻪ ﺷﺪه اﺳﺖ. ﻳﻜﻲ از ﻣﻌﺎﻳﺐ ﻣﻬﻢ ﭘﻠﻲﻛﺎﭘﺮوﻻﻛﺘﻮن، ﻋﺪم وﺟﻮد ﮔﺮوﻫﻬﺎی ﻋﺎﻣﻠﻲ ﺑﺮﺳﻄﺢ زﻧﺠﻴﺮ ﭘﻠﻴﻤﺮی ﻣﻲﺑﺎﺷﺪ ﻛﻪ آن را ﺑﻪ ﭘﻠﻴﻤﺮی ﻫﻴﺪروﻓﻮب ﺗﺒﺪﻳﻞ ﻛﺮده اﺳﺖ. ﺑﺮ اﻳﻦ اﺳﺎس ﻫﺪف از اﻧﺠﺎم اﻳﻦ ﺗﺤﻘﻴﻖ، اﺻﻼح ﺧﻮاص دارﺑﺴﺖ ﻧﺎﻧﻮاﻟﻴﺎف ﭘﻠﻲ ﻛﺎﭘﺮوﻻﻛﺘﻮن ﺑﻪ روش ﻫﻴﺪروﻟﻴﺰ ﻗﻠﻴﺎﻳﻲ ﻣﻲﺑﺎﺷﺪ. ﺑﺮاﻳﻦ اﺳﺎس دارﺑﺴﺖ ﻧﺎﻧﻮاﻟﻴﺎف ﭘﻠﻲﻛﺎﭘﺮوﻻﻛﺘﻮن در ﻣﺤﻠﻮل ﻫﻴﺪروﻛﺴﻴﺪ ﺳﺪﻳﻢ ﻗﺮار داده ﺷﺪ و اﺛﺮ ﻫﻴﺪروﻟﻴﺰ ﻗﻠﻴﺎﻳﻲ ﺑﺮآﺑﺪوﺳﺘﻲ و اﺳﺘﺤﻜﺎم ﻣﻜﺎﻧﻴﻜﻲ دارﺑﺴﺖ ﻧﺎﻧﻮاﻟﻴﺎف ﭘﻠﻲﻛﺎﭘﺮوﻻﻛﺘﻮن ﺑﺮرﺳﻲ ﮔﺮدﻳﺪ. ﺳﭙﺲ ﺳﻠﻮﻟﻬﺎی ﺑﻨﻴﺎدی ﻋﺼﺒﻲ ﺑﺮ دارﺑﺴﺘﻬﺎی ﻧﺎﻧﻮاﻟﻴﺎف ﭘﻠﻲﻛﺎﭘﺮوﻻﻛﺘﻮن ﻫﻴﺪروﻟﻴﺰ ﺷﺪه و ﻫﻴﺪروﻟﻴﺰ ﻧﺸﺪه ﻛﺸﺖ داده ﺷﺪ و اﺛﺮ ﻫﻴﺪروﻟﻴﺰ ﻗﻠﻴﺎﻳﻲ ﺑﺮ ﺗﻜﺜﻴﺮ و ﻣﺮﻓﻮﻟﻮژی ﺳﻠﻮﻟﻬﺎی ﻋﺼﺒﻲ ﺑﺮرﺳﻲ ﮔﺮدﻳﺪ. ﻧﺘﺎﻳﺞ آزﻣﺎﻳﺸﺎت اﻧﺠﺎم ﺷﺪه ﻧﺸﺎن داد ﻛﻪ ﻫﻴﺪروﻟﻴﺰ ﻗﻠﻴﺎﻳﻲ ﺑﺎﻋﺚ اﻓﺮاﻳﺶ آﺑﺪوﺳﺘﻲ دارﺑﺴﺖ ﻧﺎﻧﻮاﻟﻴﺎف ﭘﻠﻲﻛﺎﭘﺮوﻻﻛﺘﻮن ﻣﻲﮔﺮدد و اﻳﻦ اﻣﺮ ﻧﻴﺰ ﺑﺎﻋﺚ اﻓﺰاﻳﺶ رﺷﺪ و ﺗﻜﺜﻴﺮ ﺳﻠﻮاﻫﺎ و ﺑﻬﺒﻮد ﻣﺮﻓﻮﻟﻮژی ﺳﻠﻮﻟﻬﺎی ﻋﺼﺒﻲ ﺑﺮ دارﺑﺴﺖ ﻧﺎﻧﻮاﻟﻴﺎف ﻫﻴﺪروﻟﻴﺰ ﺷﺪه ﻧﺴﺒﺖ ﺑﻪ دارﺑﺴﺖ ﻧﺎﻧﻮاﻟﻴﺎف ﻫﻴﺪروﻟﻴﺰ ﻧﺸﺪه ﻣﻲﮔﺮدد .
واژهﻫﺎی ﻛﻠﻴﺪی: ﭘﻠﻲﻛﺎﭘﺮوﻻﻛﺘﻮن ، ﻣﻬﻨﺪﺳﻲ ﺑﺎﻓﺖ، دارﺑﺴﺖ ﻧﺎﻧﻮاﻟﻴﺎف، ﻫﻴﺪروﻟﻴﺰ ﻗﻠﻴﺎﻳﻲ

ادامه مطلب ...
مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 10:00 ق.ظ
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Improving UV Stabilization of wool Fabrics Using Nano TiO2

Improving UV Stabilization of wool Fabrics Using Nano TiO2
 Esfandiar Pakdel1, Majid Montazer
Abstract Wool is the most important animal fiber used by textile industry but its photo-stability is very low. Scientists searched for new ways to increase the photo-stability of wool. Nano TiO2 particles have good features to make them suitable for new applications. One of them is UV-blocking power that was used for protection fabrics against UV-rays. Treating wool fabrics with TiO2 can be effective for controlling the photo- degradation. This study focused on protection of wool fabric against UV rays. In this research, oxidized and raw wool were treated with citric acid (CA) as cross-linking agent and different concentrations of TiO2. XRD patterns proved the existence of nano TiO2 particles on the wool surface. The whiteness and yellowness of samples treated with titanium dioxide were also discussed. The results showed that TiO2 was a suitable UV absorber and its effect depends on concentration.
Keywords: Wool, Yellowness, Whiteness, UV rays, Titanium dioxide, Cross-linking agent

ادامه مطلب ...
مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 09:56 ق.ظ
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ﻣﻄﺎﻟﻌﺎت ﻣﺮﻓﻮﻟﻮژﻳﻜﻲ ﺑﺮ ﻧﺎﻧﻮاﻟﻴﺎف اﻟﻜﺘﺮورﻳﺴﻲ ﺷﺪه ازﻣ

ﻣﻄﺎﻟﻌﺎت ﻣﺮﻓﻮﻟﻮژﻳﻜﻲ ﺑﺮ ﻧﺎﻧﻮاﻟﻴﺎف اﻟﻜﺘﺮورﻳﺴﻲ ﺷﺪه ازﻣﺨﻠﻮط آﻟﺠﻴﻨﺎت ﺳﺪﻳﻢ ﺑﺎ ﭘﻠﻴﻤﺮﻫﺎی ﻫﻴﺪروﻓﻴﻞ
ﻫﮋﻳﺮ ﺑﻬﺮاﻣﻲ ، ﻋﺎدﻟﻪ ﻗﻠﻲ ﭘﻮر ﻛﻨﻌﺎﻧﻲ
ﭼﻜﻴﺪه
ﻧﺎﻧﻮاﻟﻴﺎف ﭘﻠﻴﻤﺮی دارای ﻗﺎﺑﻠﻴﺖ اﺳﺘﻔﺎده در رﻧﺞ وﺳﻴﻌﻲ از ﻛﺎرﺑﺮدﻫﺎی ﺑﻴﻮﻟﻮژﻳﻜﻲ و ﭘﺰﺷﻜﻲ ﻣﻲ ﺑﺎﺷﻨﺪ. وب ﻫﺎی ﻧﺎﻧﻮﻟﻴﻔﻲ ﺑﻪ دﻟﻴﻞ ﭘﺘﺎﻧﺴﻴﻞ ﺑﺎﻻ ﺑﺮای ﺗﻘﻠﻴﺪ و ﺷﺒﻴﻪ ﺳﺎزی ﻣﺎﺗﺮﻳﺲ ﺧﺎرج ﺳﻠﻮﻟﻲ ﻃﺒﻴﻌﻲ ﺑﺪن (ECM) از ﻟﺤﺎظ ﺳﺎﺧﺘﺎری، ﺗﺮﻛﻴﺐ ﺷﻴﻤﻴﺎﻳﻲ و وﻳﮋﮔﻲ ﻫﺎی ﻣﻜﺎﻧﻴﻜﻲ ﺑﺴﻴﺎر ﻣﻮرد ﺗﻮﺟﻪ ﻗﺮار ﮔﺮﻓﺘﻪ اﻧﺪ. در اﻳﻦ ﻣﻘﺎﻟﻪ، ﻣﺤﻠﻮل ﻫﺎی ﻣﺨﻠﻮط آﻟﺠﻴﻨﺎت ﺳﺪﻳﻢ(NaAlg) / ﭘﻠﻲ(وﻳﻨﻴﻞ اﻟﻜﻞ)(PVA) و NaAlg/ ﭘﻠﻲ اﺗﻴﻠﻦ اﻛﺴﺎﻳﺪ(PEO) ﺑﺎ ﻧﺴﺒﺖ ﻫﺎی ﺟﺮﻣﻲ ﻣﺘﻔﺎوت  ﻗﺮار اﻟﻜﺘﺮورﻳﺴﻲ ﻣﻮرد (100/0 ،25/75 ،35/65 ،50/50 ،65/35 ،75/25 ( ، PEO ﻳﺎ PVA ) 0/(NaAlg)100)ﮔﺮﻓﺖ. وﻟﺘﺎژ اﻋﻤﺎﻟﻲ (10-25KV) ﻣﺘﻐﻴﻴﺮ ﺑﻮده در ﺣﺎﻟﻴﻜﻪ ﻓﺎﺻﻠﻪ ﻧﺎزل ﺗﺎ ﺟﻤﻊ ﻛﻨﻨﺪه (15 ﺳﺎﻧﺘﻲ ﻣﺘﺮ) و ﻧﺮخ ﺧﺮوج ﭘﻠﻴﻤﺮ (0.4 ml/hr) ﺛﺎﺑﺖ ﻧﮕﻪ داﺷﺘﻪ ﺷﺪﻧﺪ. ﻣﺤﻠﻮل آﻟﺠﻴﻨﺎت ﺳﺪﻳﻢ ﺑﻪ دﻟﻴﻞ ﻧﻴﺮوﻫﺎی داﻓﻌﻪ ﺑﺎﻻ ﺑﻴﻦ زﻧﺠﻴﺮﻫﺎی آﻧﻴﻮﻧﻴﻚ ﭘﻠﻴﻤﺮ ﺑﻪ ﺗﻨﻬﺎﻳﻲ ﻗﺎﺑﻠﻴﺖ اﻟﻜﺘﺮورﻳﺴﻲ ﻧﺪارﻧﺪ. اﻳﻦ درﺣﺎﻟﻴﺴﺖ ﻛﻪ ﺑﺎ اﻓﺰدون ﭘﻠﻴﻤﺮﻫﺎی آﺑﺪوﺳﺘﻲ ﭼﻮن ﭘﻠﻲ وﻳﻨﻴﻞ اﻟﻜﻞ و ﭘﻠﻲ اﺗﻴﻠﻦ اﻛﺴﺎﻳﺪ در ﻧﺴﺒﺖ ﻫﺎی ﺑﺎﻻﺗﺮ از 50/50 رﻳﺴﻨﺪﮔﻲ اﻳﻦ ﭘﻠﻴﻤﺮ و ﺗﺒﺪﻳﻞ آن ﺑﻪ ﻧﺎﻧﻮاﻟﻴﺎف اﻣﻜﺎن ﭘﺬﻳﺮ ﻣﻲ ﺷﻮد.
واژهﻫﺎی ﻛﻠﻴﺪی: ﻧﺎﻧﻮاﻟﻴﺎف، ﺑﻴﻮﭘﻠﻴﻤﺮ، آﻟﺠﻴﻨﺎت ﺳﺪﻳﻢ، دارﺑﺴﺖ ﻫﺎی ﺑﻴﻮﻟﻮژﻳﻚ، اﻟﻜﺘﺮورﻳﺴﻲ

ادامه مطلب ...
مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 09:54 ق.ظ
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ﺑﻬﺒﻮد ﻣﻘﺎوﻣﺖ ﻛﺎﻻی ﭘﺸﻤﻲ در ﺑﺮاﺑﺮ آب و ﻗﻠﻴﺎ ﺑﻮﺳﻴﻠﻪ ﻧﺎﻧ

ﺑﻬﺒﻮد ﻣﻘﺎوﻣﺖ ﻛﺎﻻی ﭘﺸﻤﻲ در ﺑﺮاﺑﺮ آب و ﻗﻠﻴﺎ ﺑﻮﺳﻴﻠﻪ ﻧﺎﻧﻮ ﺗﻴﻮب ﻛﺮﺑﻦ
 ﻣﺤﻤﺪ ﺛﻤﻴﻦ ﻗﻴﻢ اﺻﻐﺮی ،ﻣﺠﻴﺪ ﻣﻨﺘﻈﺮ
ﭼﻜﻴﺪه
در اﻳﻦ ﺑﺮرﺳﻲ ﺳﻌﻲ ﺷﺪه اﺳﺖ ﺗﺎ ﺬﺟ ب ﻗﻄﺮه آب و ﺣﻼﻟﻴﺖ ﻗﻠﻴﺎﻳﻲ ﻛﺎﻻی ﭘﺸﻤﻲ ﭘﺲ از ﻋﻤﻞ ﺑﺎ ﻧﺎﻧﻮ ﺗﻴﻮب ﻛﺮﺑﻦ ( CNT ﺑﺮ) رﺳﻲ و ﮔﺰارش ﺷﻮد. اﺑﺘﺪا ﻧﻤﻮﻧﻪ ﭘﺎرﭼﻪ ﭘﺸﻤﻲ ﺑﻪ ﻣﻨﻈﻮر اﻓﺰاﻳﺶ ﺧﺼﻮﺻﻴﺎت ﺟﺬﺑﻲ ﺗﻮﺳﻂ ﭘﺮﻣﻨﮕﻨﺎت ﭘﺘﺎﺳﻴﻢ در ﺣﻀﻮر ﻛﻠﺮﻳﺪ ﺳﺪﻳﻢ اﻛﺴﻴﺪ ﺷﺪه اﺳﺖ. ﺑﻪ ﻣﻨﻈﻮر اﻓﺰاﻳﺶ ﭘﺎﻳﺪاری ﻧﺎﻧﻮ ﺗﻴﻮب ﻛﺮﺑﻦ روی ﭘﺎرﭼﻪ ﭘﺸﻤﻲ از ﻋﺎﻣﻞ اﻳﺠﺎد ﻛﻨﻨﺪه ﭘﻴﻮﻧﺪ ﻋﺮﺿﻲ، اﺳﻴﺪ ﺳﻴﺘﺮﻳﻚ ، ﺑﻪ ﻫﻤﺮاه ﻛﺎﺗﺎﻟﻴﺰور ﻫﻴﭙﻮ ﻓﺴﻔﻴﺖ ﺳﺪﻳﻢ اﺳﺘﻔﺎده ﺷﺪه اﺳﺖ. ﻣﺪت زﻣﺎن ﺟﺬب ﻗﻄﺮه آب و ﻣﻴﺰان ﺣﻼﻟﻴﺖ ﻗﻠﻴﺎﻳﻲ ﻛﺎﻻﻫﺎی ﭘﺸﻤﻲ ﻋﻤﻞ ﺷﺪه و ﻧﺸﺪه ﺑﺮرﺳﻲ ﺷﺪه و ﺑﻪ ﻛﻤﻚ ﻧﺘﺎﻳﺞ ﺑﺪﺳﺖ آﻣﺪه از ﺗﺼﻮﻳﺮﺑﺮداری ﻣﻴﻜﺮوﺳﻜﻮپ اﻟﻜﺘﺮوﻧﻲ، ﻃﻴﻒ ﺳﻨﺠﻲ FTIR ﻧﺘﺎﻳﺞ ﺗﺠﺰﻳﻪ و ﺗﺤﻠﻴﻞ ﺷﺪه اﻧﺪ . .
واژهﻫﺎی ﻛﻠﻴﺪی: ﻧﺎﻧﻮ ﺗﻴﻮب ﻛﺮﺑﻦ ، ﭘﺸﻢ، اﺳﻴﺪ ﺳﻴﺘﺮﻳﻚ، ﺟﺬب ﻗﻄﺮه آب، ﺣﻼﻟﻴﺖ ﻗﻠﻴﺎﻳﻲ
ادامه مطلب ...
مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 09:17 ق.ظ
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Influence of Silica Nanolayers on the Water Diffusion through th


Influence of Silica Nanolayers on the Water Diffusion through the PMMA/Layered Silicate Nanocomposites

Akram Eyvazkhani, Mohammad Karimi

Abstract
In this work, sorption process of water in poly (methyl methacrylate) (PMMA) and its nanocomposites with Cloisite 30B and Cloisite 15A (PMMA/C30B and PMMA/C15A) was investigated using ATR-FTIR method. This technique is an experimental method that measures liquid sorption kinetics in situ. In addition to the sorption kinetics, a spectroscopic technique also gives information regarding the molecular state of the penetrant at various times in the diffusional process. Calculated diffusion coefficient of samples was 3.35×10-8
, 3.15×10-9
and 1.79×10-9
cm2
/s for PMMA, PMMA/C15A and PMMA/C30B respectively. The decrease in the diffusivity of nanocomposites is related to the fact that penetrant molecules have to circumvent the silicate nanolayers and thus 'travel' a much longer distance through nanocomposites than through a neat polymer. X-ray and DSC analysis showed that the structure of PMMA/C15A and PMMA/C30B are intercalated and exfoliated respectively. Due to the more dispersion of nanoclays in exfoliated structure and creating more tortuous path, the decrease in the diffusivity of PMMA/C30B was higher than PMMA/C15A.

Keywords: Diffusion, Poly(methyl methacrylate), FTIR-ATR, Layered silicate, Intercalated, Exfoliated.

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مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 08:58 ق.ظ
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Novel Method Synthesizing Colloidal Silver Nano Particles Using

Novel Method Synthesizing Colloidal Silver Nano Particles Using Lecithin
Hossein Barani, Majid Montazer, Tayebeh Toliyat, Nasrin Samadi
Abstract Silver nanoparticles were synthesized and stabilized by a simple and environment friendly method in a nanoliposomes structure. Nanoliposomes were prepared by facing lecithin to the aqueous phase solutions while stirring vigorously. In this method, the lecithin concentration to silver nitrate ratio (KLec/Ag = [Lecithin]/ [AgNO3]) is the influencing factor in synthesis of silver nanoparticles. The influence of the factor on the stability, size distribution, and antibacterial properties of synthesized silver nanoparticles were studied by UV-visible, dynamic light scattering (DLS), and antibacterial assay. The UV spectra indicated a single symmetric extinction peak at 400 nm confirming spherical shape of the synthesized silver nanoparticles. A high KLec/Ag value leads to reducing the intensity of extinction spectra and size of Ag-liposomes nanoparticles. The stabilized silver nanoparticle with various lecithin concentrations showed a good antibacterial activity against Staphylococcus aureus a gram positive bacterium and Eschericia coli a gram negative bacterium.
 Keywords: Nanoliposome, Silver Nanoparticle, Antibacterial.

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مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 08:55 ق.ظ
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ﺑﺮرﺳﻲ اﺛﺮ ﻧﺎﻧﻮ دی اﻛﺴﻴﺪ ﺗﻴﺘﺎﻧﻴﻢ در ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ ﻛ


ﺑﺮرﺳﻲ اﺛﺮ ﻧﺎﻧﻮ دی اﻛﺴﻴﺪ ﺗﻴﺘﺎﻧﻴﻢ در ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ ﻛﺎﻻی ﭘﺸﻤﻲ رﻧﮕﺮزی ﺷﺪه ﺑﺎ روﻧﺎس
 اﻣﻴﺮ ﻛﻴﻮﻣﺮﺛﻲ ، رﺿﺎ آﺻﻔﻲ ﭘﻮر ، ﻣﺠﻴﺪ ﻣﻨﺘﻈﺮ

ﭼﻜﻴﺪه
در اﻳﻦ ﺗﺤﻘﻴﻖ اﺛﺮ ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ اﻟﻴﺎف ﭘﺸﻤﻲ رﻧﮕﺮزی ﺷﺪه ﺑﺎ رﻧﮕﺰای ﻃﺒﻴﻌﻲ روﻧﺎس و ﻋﻤـﻞ ﺷـﺪه ﺑـﺎ ﻧـﺎﻧﻮ ذی 4 اﻛﺴﻴﺪ ﺗﻴﺘﺎﻧﻴﻢ ﻣﻮرد ﺑﺮرﺳﻲ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ . ﺑﺪﻳﻦ ﻣﻨﻈﻮر اﺑﺘﺪا ﭘﺎرﭼـﻪ ﭘﺸـﻤﻲ ﺘﺷﺴ ﺸـﻮ ﺷـ ﺪه و ﺳـﭙﺲ ﺑـﺎ KMnOاﻛﺴﻴﺪ ﺷﺪه اﺳﺖ. ﺑﺮای رﻧﮕﺒﺮی ﺑﻘﺎﻳﺎی اﻛﺴﻴﺪ ﻣﻨﮕﻨﺰ از روی ﭘﺎرﭼﻪ ﭘﺸﻤﻲ از ﻣﺤﻠﻮل ﺑﻲ ﺳﻮﻟﻔﻴﺖ ﺳﺪﻳﻢ اﺳﺘﻔﺎده ﺷﺪه اﺳﺖ. در اداﻣﻪ ﭘﺎرﭼﻪ ﭘﺸﻤﻲ ﺑﺎ زاج ﺳﻔﻴﺪ دﻧﺪاﻧﻪ و هﺷﺪ ﺑﻪ وﺳﻴﻠﻪ ﺣﻤﺎم آﻟﺘﺮاﺳﻮﻧﻴﻚ ﺑﺎ روﻧﺎس و درﺻـﺪ ﻫـﺎی ﻣﺨﺘﻠـﻒ TiO ﻧﺎﻧﻮ 2( 5 % ، 1 و % 20 )% رﻧﮕﺮزی و ﺗﻜﻤﻴﻞ ﺷﺪه اﺳﺖ. ﻧﻤﻮﻧﻪ ﻫﺎی ﻋﻤﻞ ﺷﺪه ﺑﺎ اﺳﺘﻔﺎده از ﻣﺘﻴﻠﻦ ﺑﻠﻮ آﻏﺸـﺘﻪ ﺳـﺎزی
TiO2 ﺑﺮ ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ ﻛﺎﻻ ﻣﻮرد ﺑﺮرﺳـﻲ ﺷﺪه و ﺳﭙﺲ ﺗﻤﺎﻣﻲ ﻧﻤﻮﻧﻪ ﻫﺎ در زﻳﺮ ﻧﻮر UV ﻗﺮار ﮔﺮﻓﺘﻪ اﻧﺪ ﺗﺎ اﺛﺮ ﻧﺎﻧﻮ ﻗﺮار ﮔﻴﺮد. در اﻧﺘﻬﺎ ﺧﻮاص ﻛﺎﻻی رﻧﮕﺮزی ﺷﺪه ﺑﺎ ﻣﻮﻟﻔﻪ ﻫﺎی رﻧﮕﻲ ﻣﻮرد ﺑﺮرﺳﻲ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ. ﻧﺘﺎﻳﺞ ﺑﺪﺳـﺖ آﻣـﺪه ﺟﺬب روﻧﺎس ﻛﻤﺘﺮ ﺷﺪه و ﻗﺮﻣﺰی آن ﻛﻢ ﻣﻲ ﺷﻮد ﻧﺸﺎن ﻣﻲ دﻫﻨﺪ ﻛﻪ ﺑﺎ اﻓﺰاﻳﺶ ﻣﻘﺪار ﻧﺎﻧﻮ TiO. در ﺗﻤﺎﻣﻲ ﻧﻤﻮﻧـﻪ ﻫـﺎ در اﺛﺮ ﻧﻮر UV ﻣﻘﺪار رﻧﮓ روی ﻛﺎﻻ ﻛﺎﻫﺶ ﻣﻲ ﻳﺎﺑﺪ . در ﻣﻘﺎﻳﺴﻪ ﻣﻮﻟﻔﻪ ﻫﺎی رﻧﮕﻲ ﭘﺎرﭼﻪ ﻟﻜﻪ ﮔﺬاریﺷﺪه ﺑﺎ ﻣﺘﻴﻠﻦ ﺑﻠﻮ TiO2 ﺗﺎﺛﻴﺮ ﻣﺴﺘﻘﻴﻢ روی ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ ﭘﺎرﭼﻪ ﭘﺸﻤﻲ دار .د ﻧﺘﺎﻳﺞ ﺛﺒﺎت ﻧﻮری و ﺷﺴﺘﺸـﻮﻳﻲ
ﻣﺸﺎﻫﺪه ﺷﺪ ﻛﻪ ﻧﺎﻧﻮ  در ﺑﻬﺒﻮد ﺛﺒﺎت ﻧﻮری و ﺷﺴﺘﺸﻮﻳﻲ ﭘﺎرﭼﻪ ﭘﺸﻤﻲ رﻧﮕﺮزی ﺷﺪه اﺳﺖ ﻧﺸﺎن دﻫﻨﺪه ﺗﺎﺛﻴﺮ ﻣﺜﺒﺖ ﻧﺎﻧﻮ پTiO2
.
واژهﻫﺎی ﻛﻠﻴﺪی: ﻧﺎﻧﻮ دیاﻛﺴﻴﺪﺗﻴﺘﺎﻧﻴﻢ ، اﻟﻴﺎف ﭘﺸﻤﻲ، آﻟﺘﺮاﺳﻮﻧﻴﻚ، روﻧﺎس

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مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 08:51 ق.ظ
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Influence of Compatibilizer and Processing Conditions on the Dis

Influence of Compatibilizer and Processing Conditions on the Dispersion of Nanoclay in a Fiber-Forming Polypropylene Matrix
Samira Aslanzadeh1, Mohammad Haghighat Kish, Ali Asghar Katbab
Abstract
Polypropylene (PP)/Montmorillonite (MMT) nanoclay based composite was prepared by melt compounding with maleic anhydride grafted polypropylene (MA-g-PP) in a twin screw extruder and an internal mixer. Test specimens were prepared by compression molding. Mechanical properties such as tensile modulus, tensile strength and maximum percent strain were measured. The clay dispersion was investigated using wide angle X-ray diffraction and scanning electron microscopy. The XRD patterns and SEM images show that introducing the proper compatibilizing agent ratio and
suitable processing condition like a twin screw extruder decrease the immiscible clay component in the matrix. However, the increase of tensile strength is not achieved. Keywords: polypropylene, montmorilloinite, nanoclay, dispersion, processing conditions.

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مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 08:47 ق.ظ
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