Effects of microcrystalline cellulose on some performance properties of chitosan aerogels

Abstract

The aim of this research was to investigate the effect of the microcrystalline cellulose reinforcement on some physical, mechanical, thermal, and morphological properties of the chitosan aerogels. The bio-based chitosan aerogels were produced using chitosan as a matrix and the microcrystalline cellulose as a reinforce material through the freeze-drying method. The aerogel suspensions were prepared in five different ratios to investigate the effect of microcrystalline cellulose content. The density, porosity, thermogravimetric analysis, and compressive resistance tests were conducted according to relevant standards. Morphological properties were investigated using a scanning electron microscope. The introduction of microcrystalline cellulose significantly improved the compressive resistance, thermal properties (T onset and T %50 ) of the chitosan aerogels. The optimum performance properties determined as 0,12 MPa for compressive resistance, 0,27 MPa for compressive modulus, 292,45 °C for T onset and 365 °C for T %50 . According to scanning electron microscope images, aerogels showed microporous structure as expected. As a result, the bio-based chitosan aerogels reinforced with microcrystalline cellulose were successfully manufactured. The mechanical and thermal properties including compressive resistance, compressive modulus, T onset and T %50 of chitosan-microcrystalline cellulose aerogels found promising.

Activated carbon and cellulose-reinforced biodegradable chitosan foams

“…It was found that the use of boric acid to dissolve chitosan improved the thermal stability of the samples. While the mass loss of the A-0 coded sample was 54.6% in the present study, Ozen et al (2021) reported the mass loss of chitosan foams reinforced with microcrystalline cellulose, prepared by dissolving in acidic acid, were changed between 74.6% and 85.6%. The main reason for superior thermal properties is that the boric acid prevented the diffusion of oxygen and heat so that the combustion could be effectively retarded during pyrolysis (Yu et al 2017).…”

“…There have been many studies about chitosan and cellulose-based or reinforced foams. Compression modulus of chitosan and cellulose-based foams that had different densities were determined to range from 10 to 1300 KPa (Wang et al 2017;Michailidou et al 2019;Ozen et al 2021) and 15 to 2800 KPa (Gibson and Ashby 1997;Liu et al 2017), respectively. In contrast, activated carbon-reinforced foam has been evaluated in few studies and could not notably enhance the mechanical properties of foams (Ketkul et al 2017).…”

A Study on Physical, Morphological and Antibacterial Properties of Bio Polymers Reinforced Polyvinyl Acetate Foams

“…(2020) stated that the porosity value of the materials produced for porous tissue scaffolds from deoxyribonucleic acid sodium salt and chitosan varies between 49% and 62% 75 . Chitosan-based aerogels reinforced with microcrystalline cellulose and their density and porosity values ranged 0.03 g/cm 3 to 0.11 g/cm 3 and 94.73% to 62.30%, respectively 19 . As a result, the density and porosity values of the PVAc foams in this study were found to be compatible with the literature.…”

“…Disposal of waste is significantly excluded on a global scale due to increasing environmental awareness. Therefore, researchers were focused on environmentally compatible reinforcement materials in recent years [19][20][21] .…”

The crosslinking and mechanical properties of SBR compounds with the addition of carburized pine nut cone ash

“…Polymeric materials are lighter, easier to process, and have lower production costs in comparison to other materials. 1,2 In addition, polymers can be classified as thermosets and thermoplastics depending on their formability. 3 Elastomers are similar to thermosets since they cannot be reshaped once they take shape.…”