عنوان المقالة:Isolation, Preparation and Characterization of Polylactic Acid Film Reinforced with Nano silica
علاء كريم نعيمة | Alaa Kareem Niamah | 5290
- نوع النشر
- مؤتمر علمي
- المؤلفون بالعربي
- Zainab A Ali, Alaa Karem Niamah and Widad Salih Hannosh
- الملخص العربي
- Lactic acid was isolated by using microbial fermentation in whey media which was carried out by local strain Lactobacillus paraplantarum then polymerized using the acidic medium's polycondensation method. FTIR and H-NMR were used to characterize the isolated lactic acid monomer and polyalctic acid (PLA), and the results confirmed the chemical structures of the isolated lactic acid and PLA. GPC techniques were used to determine the molecular weight and molecular weight distribution of the prepared PLA; the result showed that the Polydispersity index (PDI) was 2.51. The Biodegradable composite films of poly lactic acid (PLA)/Nano silica powder were prepared by the composite film casting method using dichloromethane as solvent. In contrast, Nano silica was synthesis from hydrolysis of tetra ethoxysilane and was loaded in PLA in 1 to5 wt. %. The films were subjected to a tensile strength study. Thermogravimetric analysis (TGA) and differential thermal analysis (DSC) were used to evaluate PLA. Also, water absorption of the prepared composites was studied, and the result showed that the thermal stability and water absorption of these prepared films were increased with an increasing percentage of Nano silica, while the percentage of crystallinity of the PLA evaluated from DSC was 28 %.
- تاريخ النشر
- 04/10/2021
- الناشر
- IOP
- رقم المجلد
- رقم العدد
- رابط DOI
- DOI 10.1088/1742-6596/2063/1/012028
- الكلمات المفتاحية
- Poly lactic acid, Nano silica