Thermoplastic starch nanocomposites using cellulose-rich Chrysopogon zizanioides nanofibers.

Autor: Dominic C D M; Department of Chemistry, Sacred Heart College (Autonomous), Kochi, Kerala Pin-682013, India. Electronic address: midhundominic@shcollege.ac.in., Dos Santos Rosa D; Universidade Federal do ABC, Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS), CEP 09090-400 Santo André, SP, Brazil., Camani PH; Universidade Federal do ABC, Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS), CEP 09090-400 Santo André, SP, Brazil., Kumar AS; Department of Chemistry, Sacred Heart College (Autonomous), Kochi, Kerala Pin-682013, India., K V N; Department of Applied Chemistry, Cochin University of Science and Technology (CUSAT), Kerala Pin-682022, India., Begum PMS; Department of Applied Chemistry, Cochin University of Science and Technology (CUSAT), Kerala Pin-682022, India., Dinakaran D; Department of Chemistry, Sacred Heart College (Autonomous), Kochi, Kerala Pin-682013, India., John E; Department of Chemistry, St. Albert's College (Autonomous), Kochi, Kerala Pin-682018, India., Baby D; Department of Chemistry, St. Peter's College, Kolenchery, Kerala Pin-682311, India., Thomas MM; Department of Chemistry, Morning Star Home Science College, Angamaly, Kerala Pin-683585, India., Joy JM; Department of Chemistry, Sacred Heart College (Autonomous), Kochi, Kerala Pin-682013, India., Parameswaranpillai J; School of Biosciences, Mar Athanasios College for Advanced Studies Tiruvalla (MACFAST), Pathanamthitta, Kerala Pin-689101, India., Saeb MR; Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2021 Nov 30; Vol. 191, pp. 572-583. Date of Electronic Publication: 2021 Sep 25.
DOI: 10.1016/j.ijbiomac.2021.09.103
Abstrakt: Green thermoplastic starch (TPS) nanocomposite films aided by cellulose nanofibers (CNFs) from Chrysopogon zizanioides roots were developed and characterized. When compared to other lignocellulosic fibers, Chrysopogon zizanioides roots revealed exceptionally high cellulose content (~48%). CNFs were separated using an environmentally friendly acid isolation technique that included three stages: (i) alkali treatment; (ii) bleaching; and (iii) mild acid hydrolysis using oxalic acid in an autoclave. Following that, green nanocomposite films were made from potato starch using the solution casting process, by which we used glycerol (30 wt%) to make thermoplastic starch. Then, cellulose nanofibers in different concentrations (0, 1, 2, 3, 4 wt%) were added to the thermoplastic starch matrix. The isolated CNFs had diameters in the range of 17-27 nm. Besides, these nanostructures presented a very high crystallinity index (~65%), thereby enhanced the thermal stability. TPS/CNF green nanocomposites containing 3 wt% CNFs had exceptional tensile strength (~161%), tensile modulus (~167%), thermal stability, and crystallinity. As a result, nanocomposite films made of starch and cellulose nanofibers (3 wt%) extracted from Chrysopogon zizanioides roots would be alternatives for sustainable packaging. It can be concluded that Chrysopogon zizanioides roots have high potential for polymer industry.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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