N.E. Kochkina1, O.A. Skobeleva2, N.D. Lukin3, N.R. Andreev3
1G.A.Krestov Institute of solution chemistry of the RAS, ul. Akademicheskaya, 1, Ivanovo,153045, Russian Federation
2Branch of the Federal Budget-Funded Research Institute for Machine Science named after A.A.Blagonravov of the Russian Academy of Sciences – Research Center for Nonlinear Wave Mechanics and Technology, ul. Bardina, 4, Moskva, 119334, Russian Federation
3All-Russian Research Institute of Starch Products – the branch of the V.M. Gorbatov Federal Science Center of Food Systems of the RAS, ul. Nekrasova, 11, pos. Kraskovo, Moskovskaya obl., 140051, Russian Federation
Abstract. Generation of biodegradable films made from renewable resources and characterized by low cost as well as by enhanced physicochemical properties is an actual direction of investigations. The goal of this study was a development of a high-performance energy-efficient method for producing nanocomposite materials on the basis of the low-substituted acetate starch (AS) and Na-montmorillonite (MMT). The structure and properties of the nanocomposites were investigated. The obtainment of the nanocomposites was carried out by liquid phase method with using a rotary-pulsating device of a combined principle of action (RPD). The starch acetate (5 wt %), Na-montmorillonite (0–0.5 wt %), glycerol (5 wt %) and water (to 100 %) were mixed and treated in the rotary-pulsating device at the shear rate of 45x10E3 1/s. The time of nanocomposite production was 2–3 minutes. The nanocomposite films were formed via solution casting technique. The nanocomposite samples were investigated by X-ray diffraction and FTIR-spectroscopy. In addition, the strength and optical characteristics were investigated. All film nanocomposites are characterized by the intercalated structure of MMT. The biopolymer interacts with a nanofiller to form hydrogen bonds between oxygen-containing groups of AS and active functional centers of the MMT Al-O-H and Si-O-H basal surfaces. Introduction to the AS matrix of MMT nanoparticles to 0.5 wt. % leads to a consistent increase in strength and a decrease in the elasticity of the films. The optical transparency of the film material based on AS as a result of the addition of MMT nanoparticles decreases insignificantly. The optimum MMT concentration for improvement of physicochemical properties of starch acetate films was found to be of 0.25 wt %.
Keywords: acetate starch; montmorillonite; nanocomposite; film; FTIR-spectroscopy; strength; light transparency.
Author Details: N.E. Kochkina, Cand. Sc. (Tech.), senior research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); O.A. Skobeleva, Cand. Sc. (Chem.), senior research fellow; N.D. Lukin, D. Sc. (Tech.), director (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); N.R. Andreev, D. Sc. (Tech.), corresponding member of the RAS, scientific supervisor of the institute.
For citation: Kochkina N.E., Skobeleva O.A., Lukin N.D., Andreyev N.R. Structure and Functional Properties of Film Nanocomposites on the Basis of Low Substituted Acetate Starch and Na-Montmorillonite. Dostizheniya nauki i tekhniki APK. 2017. Vol. 31. No. 11. Pp. 87-90 (in Russ.).