MODIFIKASI PATI SECARA ASETILASI DAN APLIKASINYA PADA PEMBENTUKAN FILM

Nurhayati Nurhayati

Abstract


Along with the development of technology and processing methods used, native starch can be modified to improve its chemical, physicochemical characteristics so that it can be utilized for further products. Modified starches are starches whose hydroxyl groups have been changed by a chemical reaction (esterification, etherification, or oxidation) or by disturbing the original structure. One method of chemical starch modification commonly used is acetylation, which produces acetylated starch. Acetylated starches are produced from starch granules ethered with acetate groups by substituting starch hydroxyl groups. Chemical starch modification by acetylation with inserting an acetyl group in the OH group starch through the acetylation reaction. The reagents commonly used in the acetylation method are vinyl acetate, acetic acid, and acetic anhydrous. Acetylated starch has the physicochemical properties advantages such as gelatinization temperature, development power, solubility, and paste clarity are high. Another advantage is better storage and cooking stability when compared to native starch. In addition, the quality of the products produced from starch acetate is more stable and resistant to retrogradation. In general, starch modification by acetylation is greatly influenced by several factors, including intrinsic and extrinsic factors. Intrinsic factors include the structure of the granules (the shape and size of the granules), the composition of the granules (ratio of amylopectin and amylose, and compositions other than starch). While extrinsic factors consist of reagents (reagent type, concentration), condition of the media reaction (temperature, pH, reaction time, and pressure ), these factors will affect the degree of substitution,% acetyl, physicochemical, morphological and rheological properties, thermal and pasting of acetylated starch. In its application based on the degree of substitution, acetylated starch is classified into three levels, namely low, medium, high. Acetate starch with low DS (0.01-0.2) can function as film-forming, binder, adhesive, thickener, stabilizer, and texturing agent.


Keywords


Modifikasi pati; Asetilasi; Aplikasi film

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References


Xu, Y., Miladinov, V., & Hanna, M. A. “Synthesis and characterization of starchacetates with high substitution”. Cereal Chemistry, 81, 735–740. 2004.

Singh, N., Chawla, D., & Singh, J. “Influence of acetic anhydride on physico-chemical, morphological and thermal properties of corn and potato starch”. Food Chemistry, 86, 601–608. 2004.

Smith, Michael B., “Organic Chemistry: An acid-base approach” Taylor and FrancisGroup, USA. 2011.

Huang, J., Schols, H., Jin, Z., Sulmann, E., & Voragen, A. G. J. “Pasting proper-ties and (chemical) fine structure of acetylated yellow pea starch is affected byacetylation reagent type and granule size”. Carbohydrate Polymers, 68, 397–406. 2007.

Huber, K. C., & BeMiller, J. N. “Channels of maize and sorghum starch granules”. Carbohydrate Polymers, 41, 269–276. 2000

Bertolini, A.C., Starches Characterization, Properties, and Applications. CRC Press Taylor and Francis group. USA. 2010.

Li, W., Xiao, X., Zhang W., Zheng, J., Ouyang, S., Zhang,G., Luo, Q.” Compositional, morphological, structural and physicochemical properties of starches from seven naked barley cultivars grown in China”. Food Research International, 58, 7-14. 2010

Sodhi, N. S., & Singh, N. “Characteristics of acetylated starches preparedusing starches from different rice cultivars”. Journal of Food Engineering, 70,117–127. 2005

Islam, M. N., Rutledge, J. E., & James, W. H. “Influence of rice crystallinity on cross-linking”. Cereal Chemistry, 51, 51–56. 1974

Singh, N., Singh, J., Kaur, L., Sodhi, N. S., & Gill, B. S. “Morphological, thermal and rheological properties of starches from different botanical sources—a review”. Food Chemistry, 81, 219–231. 2003.

Colussi,R, Pinto, V.Z, Halal, S.L.M.E, Vanier, N.L., Villanova, F. A., Silva, R.M., Zavareze, E.S, Dias, A.R.G. “Structural, morphological, and physicochemical properties ofacetylated high-, medium-, and low-amylose rice starches”. Carbohydrate Polymer 103, 405-413. 2014

Luo, Z.-G., & Shi, Y.-C. “Preparation of acetylated waxy, normal, and high-amylose maize starches with intermediate degrees of substitution in aqueoussolution and their properties”. Journal of Agricultural and Food Chemistry, 60, 9468–9475. 2012

Diop, C., Li, H. L., Xie, B. J., & Shi, J. “Effects of acetic acid/acetic anhydride ratioson the properties of corn starch acetates”. Food Chemistry, 126, 1662–1669. 2011

Choi, YS., Kim H-S., Park, C-S., Kim, B-Y., Baik, M-Y. “Ultra high pressure (UHP)-assisted acetylation of corn starch”. Carbohydrate Polymers, 78, 862–868. 2009

Lawal, O. S. “Composition, physicochemical properties and retrogradationcharacteristics of native, oxidised, acetylated and acid-thinned new cocoyam (Xanthosoma sagittifolium) starch”. Food Chemistry, 87, 205–218. 2004.

Mbougueng, P. D., Tenin, D., Scher, J., & Tchiégang, C.. “Influence of acetylationon physicochemical, functional and thermal properties of potato and cassava starches”. Journal of Food Engineering, 108, 320–326. 2012

Wotton, M., & Bamunuarachchi, A. “Application of DSC to starch gelatiniza-tion”. Starch/Stärke, 31, 201–204 1979.

Wang, L., & Wang, Y. J. “Rice starch isolation by neutral protease and high-intensity ultrasound”. Journal of Cereal Science, 39, 291–296. 2004

Gonzalez, Z., & Perez, E. “Effect of acetylation on some properties of rice starch”. Starch/Stärke, 54, 148–154. 2002.

Sha, X. S., Xiang, Z. J., Bin, L., Jing, L., Bin, Z., Jiao, Y. J., et al. “Preparation andphysical characteristics of resistant starch (type 4) in acetylated indica rice”. Food Chemistry, 134, 149–154. 2012.

Chung, Y. L., & Lai, H. M. “Molecular and granular characteristics of corn starch modified by HCl–methanol at different temperatures”. Carbohydrate Polymers, 63, 527–534. 2006.

Jie, M. G., Peng, W., Sheng, M. X., Xing, Z., & Tong, Z. “Crosslinking of corn starch with sodium trimetaphosphate in solid state by microwave irradiation”. Journal of Applied Polymer Science, 102, 5854–5860. 2006

Yan, H., & Zhengbiao, G. U. “Morphology of modified starches prepared by different methods”. Food Research International, 43(20), 767–772. 2010.

Wang, X., Gao, W. Y., Zhang, L. M., Xiao, P. G., Yao, L. P., Liu, Y. “Study on the morphology, crystalline structure and thermal properties of yam starch acetates with different degrees of substitution”. Science in China Series BChemistry, 51(9), 859–865. 2008.

Betancur, A. D., Chel, G. L., & Canizares, H. E. “Acetylation and characteriza-tion of Canavalia ensiformis starch”. Journal of Agricultural and Food Chemistry, 45,378–382. 1997.

Liu, Z. “Edible films and coatings from starches”. In J. H. Han (Ed.), Innovations in food packagings (pp. 318–336). Amsterdam, The Netherlands: Elsevier. 2005.

Saartrat, S., Puttanlek, C., Rungsardthong, V., & Uttapap, D. “Paste and gel properties of low-substituted acetylated canna starches”. Carbohydrate Polymers, 61, 211–221. (2005).

López, O., García, M., Zaritzky, N. “Film forming capacity of chemically modified corn starches”. Carbohydrate. Polymers. 73, 573–581. 2008.

Mali, S., Sakanaka, L., Yamashita, F., Grossmann Eiras, M. “Water sorption and mechanical properties of cassava starch films and their relation to plasticizing effect”. Carbohydrate Polymer. 60, 283–289. 2005.




DOI: https://doi.org/10.31764/agrotek.v6i2.1659

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