Bendable films based on Chitosan

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Presentation transcript:

Bendable films based on Chitosan Rubina Ajdary

different physico-mechanical properties Chitin and chitosan Shrimp/crab Chitin Deacetylation Chitosan <50% [1] DD% MW 60-100% different physico-mechanical properties [2] 1- Rinaudo, M.,Prog. Poly Sci (2010), 31, 609 2- Younes, I., Marine Drugs (2015), 13(3), 1134 10.4.2019

Application of chitosan [3] [4] [5] 3- http://www.cosway.com.my/product/household/ecomax_chitosan%20food%20purifier.htm 4- http://www.ipbrief.net/2010/05/17/shrimp-algae-and-medical-supplies-after-29-4-million-jury-award-hemcon-to-ask-for-reversal/ 5- Luo Y, et al.Food hydrocoll (2013) 31:335 10.4.2019

Application of chitosan Removal of metal ions Flocculant to clarify water Reduce odors Water & waste treatment Eliminate synthetic polymers Treat acne Maintain skin moisture Improve suppleness of hair Cosmetics & toiletries Tone skin Toothpaste & chewing gum bacteriostatic Preservative Bind lipids Protective & fungistatic Food & beverages Dietary fiber Thikener & stabilizer Antibacterial coating for fruits [1] 10.4.2019

Sensitive Humidity-Driven Reversible and Bidirectional Bending of chitosan films 10.4.2019

Water swelling/deswelling-dependent bending in ﬁlm Bending due to the formation of a bilayer like structure consisting of asymmetric humidity-swollen and nonswollen layers Nanocellulose [6] 6- Wang, M., Advanced Materials Interfaces 2015, 2, 1500080 10.4.2019

Bendable film Preparation from Chitosan solution 1 g chitosan 100 ml 1M HCl Stirred overnight Suspension 200 ml water Stirred for 6h Suspension Dyalysis for 2 days PH= ~ 5,7 Filtration Solid concentration measurement Transparent solution Solvent evaporating 80 ml 40 ml 20 ml ~10 µm ~20 µm ~40 µm Chitosan film 10.4.2019

We aim to study the relation between… Thickness and bending curvature of the film Thickness and water adsorption in chitosan film 10.4.2019

characterization Morphology of cross-section of the film by SEM Mechanical properties under humidity control DSC Young-modulus Humidity time 10.4.2019

Thanks for your attention Your questions are welcome  10.4.2019