Effects Of Ag-Nanoparticles Dispersed Glyceryl Lactate Matrix On The Crystallization, Thermal And Electrical Properties Of Poly (Lactic Acid)

Abstract

Polymers Were Utilized In Different Areas For Longer Periods Of Time. Nowadays,Biodegradable Polymers Such As Poly (Lactic Acid) (Pla) Are Highly Applicable. To Increase The Application Of Pla For Diversified Purposes, Its Poor Crystallinity And Insulating Property Needs To Be Improved, Using Green Synthesis Approaches. Glyceryl Lactate (Gly-Lac) With Different Chain Lengths (1:3, 1:6, 1:9 And 1:12) Was Derived From Glycerol And Lactic Acid Through A Condensation Reaction, Then Purified Through Solubility In Two Different Miscible Liquid Methods And Used As A Nucleating Agent (Nas) To Increase Pla Crystallinity. Silver Nanoparticles (Agnps) Which Was Synthesised From Silver Nitrate (Agno3) Through A Biological Method Using Vernonia Amygdalina (V. Amygdalina) Leaf Extract As Reducing, Stabilizing And Capping Agents Was Used For Improvement. The Formation And Synthesis Of Gly-Lac Was Confirmed Through Acid Value CalculationAnd 75.73%, 137.44%, 148.66%, 157.08% And 33.023%, 89%, 92.54%, 112.86% Was Calculated For Before And After Purification. Nmr And Ftir Analysis Also Confirmed The Formation And Synthesis Of Gly-Lac. Dispersions Of Agnps Within The Gly-Lac Matrix Were Done Using Ultra Sonication. The Impacts Of Nucleating Agent (Gly-Lac) And Agnps Were Examined Through The Preparation Of Biopolymer Films, Using The Solution Casting Method. The Effects Of Annealing Time (30, 90 And 150 Minutes), Annealing Temperature (90 , 100 , 110 And 120 ) And Loading Rate Of Gly-Lac (1wt%, 3wt%, 5wt%, And 10wt%,) On The Degree Of Crystallinity Were Examined. The Conformity Of Green Synthesised Agnps Was Done With Uv-Vis, Xrd, Ftir And Psa. Uv-Vis Spectra Showed Absorption Peaks At 415, 418 And 423 Nm After Synthesis Of 6 Hr, 24 Hr And After 5 Months. Formations Of Four Major Peaks On Xrd Attributed To The Formation Of Agnps And Also Ftir Spectrum At 625 And 454 Attributed To Ag-Oh And Ago Formation. Particle Size For The Agnps Was Also Found To Be 3.05 And 56.45 Nm. The Higher Degree Of Crystalline Achieved Was 85.2% With 10wt% Gly-Lac Loading At 110 And For 150 Minutes Annealing Time With Using Differential Scanning Calorimeter (Dsc). The Thermal Conductivity Enhanced From 0.2 To 0.7 W M-1K -1 With 5wt% Agnps Loading, However, The Electrical Conductivity Was Not Changed, This Was Due To The Encapsulation And Shielding Effects Of Plant Extract. Therefore, It Was Possible To Conclude That Gly-Lac And Agnps Were Good Fillers And That Agnps Dispersed Gly-Lac/Pla Matrix Could Be Used In Biomedical, Packing And 3d Printing Areas