Development of bionanocomposite fibers from cellulose nanocrystal and renewable biopolymers spinnability and mechanical property

Name: Pimchanok Sarbsook

LCSH: Kasetsart University -- Theses. M.Eng. (Sustainable Energy and Resources Engineering) 2018.

Classification :.LCCS: TA418.9.C6

LCSH: Kasetsart University. -- Faculty of Engineering -- Theses.

LCSH: Fibrous composites.

LCSH: Nanobiotechnology.

LCSH: Cellulose nanocrystals.

LCSH: Biopolymers.

Abstract: As utilization of renewable materials becomes central to future sustainability, polybutylene succinate adipate (PBSA) emerges as a promising, degradable and biocompatible alternative to petrochemical commodity products. Excellent in elongation at break and ductility, the polymers suffer from low melt flow index and poor young’s modulus. As such, practical applications of the soft bioplastic require special processing conditions and additives that improve the mechanic strength at the cost of undesired contamination and loss of the distinctive biodegradability. In the present contribution, cellulose nanocrystals (CNCs) are investigated as a strength enhancer bio-nanoadditive in the fabrication of PBSA into bio-nanocomposite microfibers. First, CNCs are extracted from Nata de coco (100% bacterial cellulose) by strong alkaline treatment, followed by acid hydrolysis. Under transmission electron microscopy (TEM), the obtained bioadditives appear rod-like with 400-450 nm in length, 10-20 nm in diameter and aspect ratio (Length/Diameter) of approximately 30. The nanostructures are then mixed with the PBSA chips under melt processing in order to disperse the bioadditive in the biopolymer matrix. The bio-nanocomposites are then diluted with pristine PBSA chips at 0.1-1 wt.% for a subsequent melt fiber spinning. Under scanning electron microscopy (SEM), the obtained microfibers, 10 micron in diameter, appear round and continuous with smooth surface, which confirms both compatibility and spinnability of the nanacomposite. The effects of the nanocrystals on the physical, thermal and mechanical properties of the biopolymers are studied by SEM, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Finally, high-speed melt spinning is applied to the nanocomposite to investigate how the nanocrystals may influence the melt spinnability and continuity process at pilot and industrial scale. The additives could improve the mechanical strength of the obtained fine melt spun fibers

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Thunyapat Tongyen.

Role: Thesis Advisor

Name: Varol Intasanta.

Role: Thesis Co-Advisor

Created: 2018

Modified: 2025-06-25

Issued: 2025-06-25

วิทยานิพนธ์/Thesis

วิทยานิพนธ์/Thesis

application/pdf

URL: http://www.lib.ku.ac.th/KUthesis/2561/pimchanok-sar-all.pdf

CallNumber: TA418.9.C6.P56

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Sustainable Energy and Resources Engineering

Grantor: Kasetsart University

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