Preparation and Optimization of Chemically Modified Corn Straw/Chitosan/PLA Composite Using RSM

Authors

  • Pei Pei Department of Information Science and Engineering, Changsha Normal University, Changsha 410000, PR China
  • Lemin Guo Department of Information Science and Engineering, Changsha Normal University, Changsha 410000, PR China
  • Rui Zou Department of Information Science and Engineering, Changsha Normal University, Changsha 410000, PR China
  • Chunlan Liu Shandong Kemai Bio-mechanical Pulp Company limited, Shandong 250000, PR China
  • Xiaoyu Deng Department of Information Science and Engineering, Changsha Normal University, Changsha 410000, PR China
  • Lulu Liu
  • Xinyao Wang Department of Information Science and Engineering, Changsha Normal University, Changsha 410000, PR China
  • Jinyan Liu Department of Information Science and Engineering, Changsha Normal University, Changsha 410000, PR China
  • Menghui Yu School of Light Industry Science and Engineering, TUST, Tianjin University of Science and Technology, Tianjin 300000, PR China
  • Shizhong Li Institute of Nuclear and New Energy Technology, Tsinghua University, Tsinghua Garden, Beijing 100084, PR China

Keywords:

Chemically modified corn straw, Chitosan, Poly(lactic acid), Composite, Box-Behnken design, Response surface methodology

Abstract

In this study, an optimized composite was prepared based on chemically modified corn straw, chitosan, and poly(lactic acid) using Response Surface Methodology (RSM). The composite was produced by screw extruding and hot pressing. The Box Behnken Design (BBD) software was used to design the test to optimize the composite composition. The optimum ratio of 3 factors, e.g. chemically modified corn straw (0.10 to 0.40 g), chitosan (0.25 to 0.75 g), and poly(lactic acid) (2.00 to 3.00 g) on the response value (bending strength) of the composite was investigated. RSM-BBD provided the optimum combination of composites. The novel composite prepared under the optimized factors was characterized by Fourier transform infrared spectroscopy, mechanical testing, water absorption tests, contact angle tests, and scanning electron microscopy. The results showed that the mechanical strength, e.g., bending strength, impact strength, and tensile strength of chemically modified corn straw based composite were 21.6 MPa, 4.43 kJ/m2, and 20.0 MPa, respectively, which increased by 23.5%, 13.9%, and 18.7% compared to native corn straw based composite. Improved mechanical strength and hydrophobicity for chemically modified corn straw/chitosan/poly(lactic acid) demonstrated that chemically modified biomass fibers and bio-based degradable polymers have the potential to produce environmentally friendly composites.

 

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Published

2023-10-05

Issue

Vol. 18 No. 4 (2023)

Section

Research Article or Brief Communication