Development of biocomposites based on bacterial cellulose reinforced delignified rice husk-PVA plasticized with glycerol
- PDF / 1,890,174 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 57 Downloads / 212 Views
ORIGINAL PAPER
Development of biocomposites based on bacterial cellulose reinforced delignified rice husk‑PVA plasticized with glycerol Muhammad Asgher1 · Irum Nasir1 · Nimrah Khalid1 · Sarmad Ahmad Qamar1 Received: 29 February 2020 / Accepted: 5 October 2020 © The Polymer Society, Taipei 2020
Abstract Eco-friendly materials production from industrial wastes and renewable raw materials is being promoted for green construction applications. Therefore, considerable value can be added by combining green chemistry with microbial biotechnology to construct improved and far better, biologically stable, and compatible materials. For this purpose, herein, Schizophyllum commune IBL-06 was exploited for the production of ligninolytic enzymes (MnP, LiP, and Lac). This in-house extracted enzymatic consortium was used for the delignification of pristine rice husk. The enhanced level of delignification (40.35%) was achieved with maximum cellulose exposure (from 32 to 72%). The delignified rice husk was further reinforced with bacterial cellulose from Acetobacter xylinum. Subsequently, biocomposites were prepared from both pristine and bacterially treated rice husk using compression molding technique. Glycerol/maleic anhydride combination was used as a plasticizer/ compatibilizer and chitosan (10 wt.%) as a filler for newly developed biocomposite specimens. The newly synthesized biocomposite specimens were characterized using different imaging and analytical techniques including scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectroscopy. The characterization studies of newly developed biocomposites revealed significant improvement in morphological and mechanical properties of biocomposites. In addition, moderate increase in water uptake capacity was also observed due to the presence of hygroscopic filler among polymer matrix. In conclusion, the improved characteristics of newly developed biocomposites based on bacterial cellulose-reinforced delignified rice husk-PVA using chitosan filler suggest high throughput of enzymatic treatment for several industrial and biotechnological sectors. Keywords Biofibers · Ligninolytic enzymes · Delignification · Schizophyllum commune · Biocomposites · Polyvinyl alcohol
Introduction During past few years, the growing concern related to fossilbased functional materials has directed towards biobased polymer composites production for various applications [1–3]. Microbial polymers such as extracellular polymeric substances and agro-industrial based lignocellulosic rawmaterials possess a huge potential to replace petrochemically originated materials for wide range of applications in different sectors such as pharmaceutical, food, automotive, construction, biomedical, packaging and cosmaceutical industries [2, 4–6]. However, the non-homogeneous nature of biofibers with a plenty of lignin remains a problem while * Sarmad Ahmad Qamar [email protected] 1
Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
dealing with lignocellulosic biom
Data Loading...
