Thermoplastic Starch (TPS) Obtained from Mango Kernel Flour by Means of Extrusion Process with Different Plasticizers

Abstract:

This work reports on the development of thermoplastic starch materials based on mango kernel flour. Mango kernel has a high starch content, which is why the flour obtained after grinding can be used as raw material to obtain thermoplastic starch (TPS) or rather starch rich thermoplastic materials. For this purpose, a plasticization process is carried out in a twin-screw extruder using different plasticizers, namely glycerol, sorbitol and urea, which are thereafter subjected to an injection-moulding process to obtain tensile test samples. In order to assess the difference in properties depending on the plasticizer used, the rheological, mechanical and morphological properties were characterized and evaluated. Sorbitol and urea plasticized thermoplastic starch showed superior mechanical properties to those of the sample with glycerol, achieving tensile strengths close to 3 MPa and an elongation at break of 50%. This was ascribed to the higher molecular weight of sorbitol and the higher amount of active functionalities in urea and sorbitol, which allow to form stronger bonds with starch during thermoplastification. Morphological images confirmed this fact and showed that MKF particles were also present in the TPS matrix, probably acting as reinforcing agents that enhance the mechanical performance of the materials.

• Periodical: Key Engineering Materials (Volume 957)
• Pages: 21-27
• DOI: https://doi.org/10.4028/p-w62C6Y
• Online since: October 2023
• Authors: Jaume Gomez-Caturla*, Juan Ivorra-Martinez, Daniel Garcia-Garcia, Rafael Balart, Franco Dominici, Debora Puglia, Luigi Torre
• Keywords: Mango Kernel, Plasticizers, Thermoplastic Starch

References

[1] M. Shen, W. Huang, M. Chen, B. Song, G. Zeng, Y. Zhang, (Micro) plastic crisis: un-ignorable contribution to global greenhouse gas emissions and climate change, Journal of Cleaner Production 254 (2020) 120138.

DOI: 10.1016/j.jclepro.2020.120138

[2] P. Liminana, D. Garcia-Sanoguera, L. Quiles-Carrillo, R. Balart, N. Montanes, Development and characterization of environmentally friendly composites from poly (butylene succinate)(PBS) and almond shell flour with different compatibilizers, Composites Part B: Engineering 144 (2018) 153-162.

DOI: 10.1016/j.compositesb.2018.02.031

[3] A. Ashori, Wood–plastic composites as promising green-composites for automotive industries!, Bioresource technology 99(11) (2008) 4661-4667.

DOI: 10.1016/j.biortech.2007.09.043

[4] J. Gomez-Caturla, J. Ivorra-Martinez, L. Quiles-Carrillo, R. Balart, D. Garcia-Garcia, F. Dominici, D. Puglia, L. Torre, Improvement of the barrier and mechanical properties of environmentally friendly mango kernel flour/glycerol films by varying the particle size of mango kernel flour, Industrial Crops and Products 188 (2022) 115668.

DOI: 10.1016/j.indcrop.2022.115668

[5] S. Zhang, C. Xia, Y. Dong, Y. Yan, J. Li, S.Q. Shi, L. Cai, Soy protein isolate-based films reinforced by surface modified cellulose nanocrystal, Industrial Crops and Products 80 (2016) 207-213.

DOI: 10.1016/j.indcrop.2015.11.070

[6] J. Chen, F. Chen, Y. Meng, S. Wang, Z. Long, Oxidized microcrystalline cellulose improve thermoplastic starch-based composite films: Thermal, mechanical and water-solubility properties, Polymer 168 (2019) 228-235.

DOI: 10.1016/j.polymer.2019.02.026

[7] Y. Zhang, C. Rempel, Q. Liu, Thermoplastic starch processing and characteristics—a review, Critical reviews in food science and nutrition 54(10) (2014) 1353-1370.

DOI: 10.1080/10408398.2011.636156

[8] J. Bai, H. Pei, X. Zhou, X. Xie, Reactive compatibilization and properties of low-cost and high-performance PBAT/thermoplastic starch blends, European Polymer Journal 143 (2021) 110198.

DOI: 10.1016/j.eurpolymj.2020.110198

[9] N. Leblanc, R. Saiah, E. Beucher, R. Gattin, M. Castandet, J.-M. Saiter, Structural investigation and thermal stability of new extruded wheat flour based polymeric materials, Carbohydrate polymers 73(4) (2008) 548-557.

DOI: 10.1016/j.carbpol.2007.12.034

[10] M. Gaspar, Z. Benkő, G. Dogossy, K. Reczey, T. Czigany, Reducing water absorption in compostable starch-based plastics, Polymer Degradation and Stability 90(3) (2005) 563-569.

DOI: 10.1016/j.polymdegradstab.2005.03.012

[11] D. Puglia, F. Dominici, J.M. Kenny, C. Santulli, C. Governatori, G. Tosti, P. Benincasa, Tensile behavior of thermoplastic films from wheat flours as function of raw material baking properties, Journal of Polymers and the Environment 24 (2016) 37-47.

DOI: 10.1007/s10924-015-0745-4

[12] C.A. Ferraz, R.L. Fontes, G.C. Fontes‐Sant'Ana, V. Calado, E.O. López, M.H. Rocha‐Leão, Extraction, modification, and chemical, thermal and morphological characterization of starch from the agro‐industrial residue of mango (Mangifera indica L) var. Ubá, Starch‐Stärke 71(1-2) (2019) 1800023.

DOI: 10.1002/star.201800023

[13] M. Zdanowicz, Starch treatment with deep eutectic solvents, ionic liquids and glycerol. A comparative study, Carbohydrate polymers 229 (2020) 115574.

DOI: 10.1016/j.carbpol.2019.115574

[14] F. Ivanič, M. Kováčová, I. Chodak, The effect of plasticizer selection on properties of blends poly (butylene adipate-co-terephthalate) with thermoplastic starch, European Polymer Journal 116 (2019) 99-105.

DOI: 10.1016/j.eurpolymj.2019.03.042

[15] K. Martinez Villadiego, M.J. Arias Tapia, J. Useche, D. Escobar Macías, Thermoplastic starch (TPS)/polylactic acid (PLA) blending methodologies: a review, Journal of Polymers and the Environment 30(1) (2022) 75-91.

DOI: 10.1007/s10924-021-02207-1

[16] P. Benincasa, F. Dominici, L. Bocci, C. Governatori, I. Panfili, G. Tosti, L. Torre, D. Puglia, Relationships between wheat flour baking properties and tensile characteristics of derived thermoplastic films, Industrial Crops and Products 100 (2017) 138-145.

DOI: 10.1016/j.indcrop.2017.02.021

[17] H. Li, M.A. Huneault, Comparison of sorbitol and glycerol as plasticizers for thermoplastic starch in TPS/PLA blends, Journal of Applied Polymer Science 119(4) (2011) 2439-2448.

DOI: 10.1002/app.32956

[18] M.-F. Huang, J.-G. Yu, X.-F. Ma, Studies on the properties of montmorillonite-reinforced thermoplastic starch composites, Polymer 45(20) (2004) 7017-7023.

DOI: 10.1016/j.polymer.2004.07.068

[19] S.M. Rangappa, S. Siengchin, J. Parameswaranpillai, M. Jawaid, T. Ozbakkaloglu, Lignocellulosic fiber reinforced composites: Progress, performance, properties, applications, and future perspectives, Polymer Composites 43(2) (2022) 645-691.

DOI: 10.1002/pc.26413