Be final
Download as PPTX, PDF2 likes643 views
This document summarizes an experiment to synthesize bioplastic films from banana peels. The objective was to identify processing parameters that yield films with maximum tensile strength. Films were produced by hydrolyzing starch in peels with acid at varying pH, time, and plasticizers. Tests showed neutral pH films with 15 minute hydrolysis and sorbitol plasticizer had the highest tensile strength of 26.06 MPa. Overall, the experiment demonstrated banana peels can be used to create biodegradable plastic films through controlled hydrolysis of peel starch.
Be final
- 1. Bioplastics Synthesis of polymeric films using waste banana peels Abhijit Mohapatra 60011100028 Hemant Sharma 600011100054 Shruti Prasad 60011100034
- 3. Objective of the Project The Objective of this project was to synthesize bio-polymeric films from banana peels and identify the ideal combination of parameters which would give the maximum tensile strength to the sample. The parameters considered were : i. pH of the reaction mixture ii. Residence time for hydrolysis of the reaction mixture iii. Choice of plasticizer
- 4. Procedure for Synthesis Preparation of Banana Paste Boiling Decant water Drying Grinding
- 5. Production of Film 25gm Paste Add 3ml HCl Add 2ml Plasticizer Add NaOH Baking Polymeric film
- 6. Reaction Mechanism Starch consists of two different types of polymer chains: 1. Branched chained amylopectin 2. Linear Chained Amylose
- 7. Hydrolysis Amylose is a straight polymer, a desirable polymer to make plastic Amylopectin is branched polymer which makes the plastic brittle Acid Hydrolysis is done to break the branched chains of amylopectin to aid plastic formation
- 8. Addition of Plasticizer The Plasticizer gets in between the polymer chains and prevents them from lining up in rows to form a crystalline structure. The Plasticizer increases flexibility, and develops the plasticity of the product.
- 9. Addition of NaOH If hydrolysis time is prolonged, amylose also gets hydrolysed Hence, NaOH is added to neutralize the Acid
- 11. Trials Conducted 9 Experimental trials were conducted, out of this 3 were accepted for testing Reasons for discarding samples: • Perforations on the sample • Incomplete baking • Incorrect Concentration of reagents
- 12. Procedure: Tensile Strength Test Step 1: Visual inspection Step 2: The approved sample is cut into a 2cm by 4cm rectangular slice Step 3: The samples are clamped such that 60% of the sample is our testing region 4cm Sample 20%60%20% 2 cm
- 13.
- 14. Tensile Strength Test Apparatus
- 15. Observations pH Residence Time (Minutes) Sample Weight (grams) Acidic 5 1/04-8 341.41 10 1/04-7 351.89 15 3/04-2 200.94 20 1/04-5 271.53 Basic 5 26/03-4 331.2 10 3/04-4 160.9 15 26/03-2 240.89 20 26/03-1 131.15 Neutral 5 3/04-3 231.59 10 1/04-3 331.50 15 1/04-2 406.19
- 16. pH Sample Thickness (mm) 1 2 3 4 5 Mean Acidic 1/04-8 0.94 0.9 0.8 0.8 0.74 0.836 1/04-7 0.66 0.62 0.6 0.64 0.62 0.628 3/04-2 0.72 0.6 0.48 0.48 0.5 0.556 1/04-5 0.5 0.52 0.54 0.56 0.42 0.508 Basic 26/03-4 0.62 0.6 0.68 0.7 0.62 0.644 3/04-4 0.9 0.84 0.7 0.78 0.94 0.832 26/03-2 0.66 0.66 0.7 0.7 0.84 0.712 26/03-1 0.6 0.52 0.54 0.48 0.58 0.544 Neutral 3/04-3 0.6 0.64 0.74 0.68 0.78 0.688 1/04-3 0.62 0.58 0.66 0.68 0.66 0.64 1/04-2 0.6 0.52 0.54 0.66 0.58 0.58 1/04-1 0.6 0.52 0.54 0.62 0.52 0.56
- 17. Analysis
- 18. 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0 5 10 15 20 25 TensileStrength(MPa) Residence Time (mins) Tensile Strength Vs Residence Time (Combined Plot) Acidic Neutral Basic Stage 1
- 19. 0 5 10 15 20 25 30 35 40 45 50 0 5 10 15 20 25 %Conversion Residence Time Conversion Vs Residence Time (Combined) Acidic Basic Neutral
- 20. Final Trial pH Plasticiser Residence Time (Minutes) Sample Weight (grams) Neutral Glycerine 15 16/04-2 456.2 Neutral Sorbitol 15 16/04-3 794.95 Neutral PEG 15 16/04-4 558.11 Plasticizer Sample Thickness (mm) 1 2 3 4 5 Mean Glycerine 16/04-2 0.68 0.6 0.6 0.8 0.72 0.68 Sorbitol 16/04-3 0.48 0.5 0.5 0.5 0.6 0.516 PEG 16/04-4 1.1 0.94 0.82 0.8 0.7 0.872
- 21. Stage 2 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Glycerine Sorbitol PEG 400 Tensile Strength for Different Plasticizers Tensile Strength for Different Plasticisers Tensile Strength (N/mm^2)
- 22. Properties Sorbitol Glycerine PEG Brittleness Least Flexible Flexible structure Flexible structure Tensile strength Highest TS :26.06MPa 14.31MPa 16.14MPa 0 10 20 30 40 50 Glycerine Sorbitol PEG Conversion For Different Plasticizers Conversion %
- 23. Suggested PPS
- 24. Future Scope Exploring other Sources of Starch Effect of varying concentrations of Reagents Extensive Testing Extraction of Starch from peels Understanding the effect of Reagents on other components of the peel
- 25. Thank You