Bio-degradable cassava starch-based adhesives were produced from chemically gelatinized starch formulations. The varying combinations of process parameters applied include: concentration of gelatinization modifier, mass % borax/starch, and temperature of reaction mixture. The physico-chemical parameters for characterizing the adhesive samples were viscosity, density, pH and bonding strength. The effects of the variation of process parameters on the quality of the adhesives were assessed using response surface (central composite) designs with 2 factors, to relate the highest adhesive quality with the optimal combination of process factors. The adhesives produced using HCl as the gelatinization modifier were of a higher quality than those produced using NaOH with one of the most important quality assessment parameters which is the bond strength being 22.31 kPa at 0.01 M and 20% mass borax/starch and 11.60 kPa at 0.01 M and 8% mass borax/starch for HCl and NaOH respectively. The experimental results demonstrated that the optimal temperature for the production of the adhesive was 85？C.
References
[1]
Grace, M.R. (1977) Cassava Processing: Cassava Starch and Its Uses. Plant Production and Protection Series. FAO.
[2]
Srichuwong, S. and Jane, J.-L. (2007) Physico-Chemical Properties of Starch Affected by Molecular Composition and Structure: A Review. Journal of Food Science and Biotechnology, 16, 663-674.
[3]
Akpa, J.G. (2012) Production of Cassava Starch-Based Adhesive. Research Journal in Engineering and Applied Sciences, 1, 219-214,
Wheatley, C.C., Zakhia, N. and Chuzel, G. (2003) Cassava/The Nature of the Tuber. Encyclopedia of Food Sciences and Nutrition. 2nd Edition, Academic Press, Massachusetts, 964-969. https://doi.org/10.1016/B0-12-227055-X/00181-4
[6]
Finnie, S. and Atwell, W.A. (2016) Composition of Commercial Flour. Wheat Flour Handbook, 2nd Edition, Cereals & Grains Associations, AACC International, Inc., 35-41.
[7]
Chattopadhyay, A.K. (2014) Adhesive and Sealant Industry. https://www.adhesivesmag.com/articles/93226-boring-boron-and-adhesives
[8]
BeMiller, J.N. and Yongfeng, A. (2019) Starches: Molecular and Granular Structures and Properties. Carbohydrate Chemistry for Food Scientists, 3rd Edition, AACI and Elsevier Inc., 159-182. https://doi.org/10.1016/B978-0-12-812069-9.00006-6
[9]
Marino, R., Giovando, S. and Gabriele, D. (2014) Effect of Tannin Addition on the Rheological Properties of Starch-Based Adhesives. Applied Rheology, 24, 46138.
[10]
Nasiri, A., Wearing, J. and Dube, M.A. (2020) Using Lignin to Modify Starch-Based Adhesive Performance. Chemengineering, 4, 3. https://doi.org/10.3390/chemengineering4010003
[11]
Roberts, S.A and Cameron, R.E. (2002) The Effects of Concentration and Sodium Hydroxide on the Rheological Properties of Potato Starch Gelatinisation. Carbohydrate Polymers, 50, 133-143. https://doi.org/10.1016/S0144-8617(02)00007-3
[12]
Gratrix, A.P. and Enright, S.M. (2006) Foundations of Anesthesia: Basic Sciences for Clinical Practice. Hemmings, Jr, H.C. and Hopkins, P.M., Eds. Elsevier, Philadelphia.
