فیلم زیست‌تخریب‌پذیر کامپوزیت نشاسته اصلاح شده/آلبومین حاوی نانوذرات اکسید منیزیم: بررسی ویژگی های رنگی، شفافیت، خواص مکانیکی و گرماسنجی

در اﯾﻦ ﭘﮋوﻫﺶ 19 ﻧﻤﻮﻧﻪ ﻓﯿﻠﻢ ﺧﻮراﮐﯽ ﺑﺎ اﺳﺘﻔﺎده از ﻧﺸﺎﺳﺘﻪ اﺻﻼح ﺷﺪه ( 2 - 0ﮔﺮم)، آﻟﺒﻮﻣﯿﻦ (2 - 0ﮔﺮم)، ﻧﺎﻧﻮ ذره اﮐﺴﯿﺪﻣﻨﯿﺰﯾﻢ (5 - 0درﺻﺪ)، ﺗﻬﯿﻪ و وﯾﮋﮔﯽ ﻫﺎی ﻓﯿﺰﯾﮑﻮﺷﯿﻤﯿﺎﯾﯽ ﺷﺎﻣﻞ آزﻣﻮن ﻫﺎی رﻧﮓ ﺳﻨﺠﯽ، ﺷﻔﺎﻓﯿﺖ، ﺧﻮاص ﻣﮑﺎﻧﯿﮑﯽ، ﮔﺮﻣﺎﺳﻨﺠﯽ و ﺗﺼﺎوﯾﺮ ﻣﯿﮑﺮوﺳﮑﻮپ اﻟﮑﺘﺮوﻧﯽ روﺑﺸﯽ ﺑﺮرﺳﯽ ﺷﺪ. اﻓﺰودن ﻧﺎﻧﻮذرات اﮐﺴﯿﺪﻣﻨﯿﺰﯾﻢ ﺑﻪ ﻓﯿﻠﻢ ﻫﺎی ﻧﺎﻧﻮﮐﺎﻣﭙﻮزﯾﺘﯽ ﺑﺮ ﭘﺎﯾﻪ ﻧﺸﺎﺳﺘﻪ اﺻﻼح ﺷﺪه و آﻟﺒﻮﻣﯿﻦ ﺑﺎﻋﺚ ﮐﺎﻫﺶ ﻣﯿﺰان ﺷﻔﺎﻓﯿﺖ و اﻓﺰاﯾﺶ ﻣﺎﺗﯽ ﻓﯿﻠﻢ ﻫﺎ و اﻓﺰاﯾﺶ ﺷﺎﺧﺺ *a، *b و اﻧﺪﯾﺲ زردی (yi)، ﺑﯿﺎﻧﮕﺮ اﻓﺰاﯾﺶ رﻧﮓ زرد در ﻓﯿﻠﻢ ﻫﺎی ﺣﺎوی ﻏﻠﻈﺖ ﻫﺎی ﺑﺎﻻی ﻧﺎﻧﻮذرات اﮐﺴﯿﺪﻣﻨﯿﺰﯾﻢ اﺳﺖ و اﻓﺰاﯾﺶ ﺗﻐﯿﯿﺮات رﻧﮕﯽ ﮐﻞ (δε) ﺑﯿﺎﻧﮕﺮ ﮐﺎﻫﺶ ﺷﻔﺎﻓﯿﺖ ﻓﯿﻠﻢ ﻫﺎ اﺳﺖ. ﻫﻤﭽﻨﯿﻦ اﻓﺰودن ﻧﺎﻧﻮذرات mgo ﺑﻪ آن ﻫﺎ، اﺳﺘﺤﮑﺎم و ﺧﺼﻮﺻﯿﺎت ﻣﮑﺎﻧﯿﮑﯽ ﻓﯿﻠﻢ ﻫﺎ (اﺳﺘﺤﮑﺎم ﮐﺸﺸﯽ و ﮐﺮﻧﺶ ﺗﺎ ﻧﻘﻄﻪ ﺷﮑﺴﺖ) ﺑﻬﺒﻮد ﯾﺎﻓﺖ. ﻓﯿﻠﻢ ﻫﺎی ﺣﺎوی ﻧﺎﻧﻮذرات اﮐﺴﯿﺪ ﻣﻨﯿﺰﯾﻢ، اﻓﺰاﯾﺶ دﻣﺎ اﻧﺘﻘﺎل ﺷﯿﺸﻪ ای، دﻣﺎ ذوب و ﮐﺎﻫﺶ دﻣﺎ ﮐﺮﯾﺴﺘﺎﻟﯿﺰاﺳﯿﻮن را ﻧﺸﺎن داد؛ ﮐﻪ ﺗﺄﯾﯿﺪ ﮐﻨﻨﺪه ﺗﺄﺛﯿﺮ ﻣﺜﺒﺖ وﺟﻮد ﻧﺎﻧﻮذرات mgo ﺑﺮ اﻓﺰاﯾﺶ ﭘﺎﯾﺪاری ﺣﺮارﺗﯽ ﻓﯿﻠﻢﻫﺎی ﻧﺎﻧﻮﺑﯿﻮﮐﺎﻣﭙﻮزﯾﺘﯽ اﺳﺖ. ﺗﺼﺎوﯾﺮ ﻣﯿﮑﺮوﺳﮑﻮپ اﻟﮑﺘﺮوﻧﯽ روﺑﺸﯽ (sem) ﻓﯿﻠﻢﻫﺎی ﺗﻮﻟﯿﺪی، ﺳﻄﺢ ﻧﺎﻫﻤﮕﻦ در ﻓﯿﻠﻢﻫﺎی ﺣﺎوی ﻧﺎﻧﻮذرات اﮐﺴﯿﺪ ﻣﻨﯿﺰﯾﻢ را ﻧﺴﺒﺖ ﺑﻪ ﻓﯿﻠﻢﻫﺎی ﺑﺪون ﻧﺎﻧﻮذرات ﻧﺸﺎن داد.

Biodegradable film of modified starch/albumin containing magnesium oxide nanoparticles; Investigation of color, transparency, mechanical, and calorimetry properties

In this study, 19 samples of biodegradable films using modified starch (02 g), albumin (20 g), nanoparticles of magnesium oxide (05%), were prepared and physicochemical properties including colorimetric, transparency, mechanical, calorimetry and morphological properties were investigated. Addition of magnesium nanoparticles to modified starchbased nanocomposite films and albumin decreased the transparency and increased the opacity of the films and increased the a, b and YI index, indicating an increase in yellow color in films containing high concentrations of MgO nanoparticles and an increase in E film. The addition of MgO nanoparticles to them also improved the strength and mechanical properties of the films (tensile strength and strain to breaking point). Films containing magnesium oxide nanoparticles showed an increase in glass transition temperature, a melting temperature and a decrease in crystallization temperature; Which confirms the positive effect of MgO nanoparticles on increasing the thermal stability of nanobiocomposite films. SEM images of the produced films showed a heterogeneous level in films containing magnesium oxide nanoparticles compared to films without nanoparticles.