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Hybrid mathematical modeling and multi‐objective optimization of mechanical properties of green composites based on starch and modified rice straw fillers
Author(s) -
Shoja Maryam,
Kazemi Reza,
MohammadiRoshandeh Jamshid,
Farizeh Tara,
Shadman Alireza,
Hemmati Farkhondeh
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.50915
Subject(s) - materials science , response surface methodology , ultimate tensile strength , composite material , thermosetting polymer , starch , thermoplastic , mathematics , food science , statistics , chemistry
A hybrid mathematical modeling/optimization approach based on the response surface methodology (RSM) and desirability function (DF) capabilities was applied here to imitate and optimize the mechanical properties of thermoplastic starch‐based biocomposites. In order to prepare the biodegradable and renewable biocomposites, rice straw (RS) was chemically modified to obtain more effective sustainable reinforcing fillers for starch, having semi‐thermoset and core‐shell structures. A combination of different RS products was used in the biocomposites and the composition of RS‐based fillers was chosen as control variable. A series of experiments, by using RSM, were designed to assess the effects of filler loading and composition on the Young modulus, tensile strength, ultimate strain, and absorbed energy of the biocomposites. The best‐fitting regression functions were identified via RSM statistical analysis and transformed into DF to optimize the desired responses concurrently. The findings demonstrate that the starch/RS product biocomposites with optimum elastic modulus (339.3 MPa), tensile strength (9.8 MPa), elongation at break (13.8%), and absorbed energy (1831.2 kJ/m 2 ) were obtained by incorporating RS‐based fillers with both semi‐thermoset and core‐shell structures in combination with each other at loadings of 13.5 and 6.5 phr, respectively.