Document Type : Research Paper

Authors

1 M.Sc., in Pulp and Paper Industries, Gorgan University of Agricultural Sciences and Natural Resources, Iran

2 Associate Prof. in Pulp and Paper Industries, Gorgan University of Agricultural Sciences and Natural Resources, province: Golestan, Iran

3 Assistant Prof. in Wood Engineering and Technology, Gorgan University of Agricultural Sciences and Natural Resources, province: Golestan, Iran

4 Assistant Prof. in Cellulose and Paper Technology, Faculty of Engineering and New Technologies, Shahid Beheshti University, province: Mazandaran, Iran

Abstract

In the present study, preparation of cotton stalk (Sahel variety) as one of the common agricultural residues was studied through three stages as Soda-AQ chemical pulping, delignification and alkaline treatment, aiming for the production of cellulose nanocrystal. In order to identify the optimum condition for the preparation of cellulose nanocrystal, acidic hydrolysis of the produced alpha-cellulose was done using 64% sulfuric acid, 25, 35 and 45 minute as time and at 35, 45 and 55 degree centigrade as temperature. Atomic Force Microscopy (AFM), X-Ray Diffraction, and Dynamic Light Scattering (DLS) were used to identify the quantitative and qualitative properties of cellulose nanocrystals. AFM micrographs showed that more severe condition of the treatments decreased the thickness of the cellulose nanocrystals. XRD results also demonstrated that the preparation stages of alpha-cellulose as well as acidic hydrolysis treatments much effectively increased the degree of crystallinity. DLS results indicated that 98.7 percent of the produced nanocrystals under the condition of 55 degree centigrade and 45 minute were in the range of 18-95 ηm, whose highest abundance was in the range of 18-39 ηm. Thus, the mentioned condition were determined as the best and optimum condition for the production of cellulose nanocrystal from cotton stalk cellulose.

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Main Subjects

-Bondeson, D., Mathew, A. and Oksman, K., 2006. Optimization of the isolation of nanocrystals from microcrystalline cellulose by acid hydrolysis. cellulose. 13:171–180.
-Beck-Candanedo, S., Roman, M. and Gray, D.G., 2005. Effect of reaction conditions on the properties and behaviour of wood cellulose nanocrystal suspensions. Biomacro molecules. 6:1048-54.
-Benavides, E.E.U., 2011. Cellulose nanocrystals properties and applications in renewable nanocomposites. A Dissertation  Presented to  The Graduate School of  Clemson University.
-Dhar, N., 2006. Novel cellulose nanoparticles for potential cosmetic and pharmaceutical applications. Presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of master of applied science in chemical engineering.
-Fan, J.SH., Li, Y.H., 2012. Maximizing the yield of nanocrystalline cellulose from cotton pulp fiber. Carbohydrate Polymers.88:1184– 1188.
-Gong, G., Mathew, A.P. and Oksman, K., 2011. Strong aqueous gels of cellulose nanofibers and nano whiskers isolated from softwood flour. Tappi Journal. pp. 7-14.
-Henrique, M.A., Silvério, H.A. and Pasquini D., 2012 Extraction and characterization of cellulose nanocrystals from mango seeds in view of their use as reinforcement in nanocomposites. Universidade Federal de Uberlândia, Uberlândia, MG, Brazil.
-Ioelovich, M., 2012. Optimal conditions for isolation of nanocrystalline cellulose particles. Nanoscience and Nanotechnology. 2:9-13.
-Johara, N., Ahmad, I. and Dufresnec, A., 2011. Extraction, preparation and characterization of cellulose fibres and nanocrystals from rice husk. Industrial Crops and Products. 37: 93– 99.
-Kargarzadeh, H., Ahmad, I., Abdullah, I., Dufresne, A., Zainudin, S. Y. and  Sheltami, R.M., 2012. Effects of hydrolysis conditions on the morphology, crystallinity, and thermal stability of cellulose nanocrystals extracted from kenafbast fibers. Cellulose. 19:855–866.
-Krishnamachari, P., Hashaikeh, R., Chiesa M., Gad EL Rab, k.R.M., 2011. Effects Of Acid Hydrolysis Time On Cellulose Nanocrystals Properties: Nanoindentation and thermogravimetric studies. Cellulose Chem. Technol. 46:13-18.
-Li, Y. and Ragauskas, A.J., 2010. Cellulose nano whiskers as a reinforcing filler in polyurethanes. Pp: 17-36. In Reddy, I.B. (Eds.), Advances in Diverse Industrial Applications of Nanocomposites. Nanomaterials. pp:300.
-Li, W., Wang, R. and Liu, Sh., 2011. Nanocrystalline cellulose prepared from softwood kraft pulp via ultrasonic-assisted acid hydrolysis. Bioresource. 6:4271-4281.
-Martins, M.A., Teixeira, E.M., Correˆa, A.C., Ferreira, M. and Mattoso, L.H.C., 2011. Extraction and characterization of cellulose whiskers from commercial cotton fibers. J Mater Sci. pp:7858–7864.
-Mazandaranim, M. and GHasemian, A., 2013. Investigation of fiber dimension and chemical composition of cotton stalk of sahel species. The second congress of national of agricultural costant development and healthy environment. Hamedan. September 12.
-Oksman, K., Mathew, A.P., Bondeson, D. and Kvien, I., 2006.Manufacturing process of cellulose whiskers/polylactic acid nanocomposites. Compos Sci Technol. 66:2776–2784.
-Segal, L., Creely, J., Martin, J.A. and Conrad, M., 1959. An empirical method for estimating the degree of crystallity of native cellulose using the X-ray diffractometer. Text. Res. J 29:786-794.
-Shostrom, A. 2002.Wood chemistry, translated mirshkraei, ahmad, Tehran, aeizh, pp:194.
-Siro, I., Plackett, D., 2010. Microfibrillated Cellulose And New Nanocomposite Materials: A Review, Cellulose, 17: 459–494.
-Teixeira, E.M., Bondancia, T.J., Ricardo Teodoro, K.B., Correa, A.C., Marconcini, J.M. and CaparelliMattoso, L.H., 2010. Sugarcane bagasse whiskers: Extraction and characterizations. Industrial Crops and Products. 33: 63–66.
-Thomas, S., Paul, S.A., Pothan,L.A., Deepa, B., 2011. Natural Fibres: Structure, Properties and Applications. Pp:4-37. In  Kalia, S., Kaith, B.S. and Kaur, I., (Eds.). Cellulose fibers: bio- and nano-polymer composites. Springer. pp:213.
-Wise, L.E., Daddieco, M.M.A., 1946. Chlorite holocellulose, its fractionation and bearing on summative wood analysis and on studies on the hemicelluloses, Tappi Section 11.