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Witita Laosamathikul. Development of PLA-based composites employing cellulose nanocrystals extracted from rice bran waste. Master's Degree(Engineering Technology). Thammasat University. Thammasat University Library. : Thammasat University, 2015.
Development of PLA-based composites employing cellulose nanocrystals extracted from rice bran waste
Name: Witita Laosamathikul
keyword:
Cellulose nanocrystals
Abstract:
Rice bran waste (RBW) is a bio-residue from rice bran oil extraction process, which is generated in large amount every year. In this work, rice bran waste is used as raw materials in the preparation of cellulose nanocrystals (CNC). The raw material is extracted by alkali extraction and bleaching treatment to produce rice bran cellulose (RBC) by removed hemicellulose and lignin. Subsequently, the crystalline domains are extracted from this cellulose to form CNC by acid hydrolysis. Structures and properties of the resulting CNC are characterized. The results suggest that the uniform-sized CNC is in the form of high-purity single crystal, which exhibits good thermal properties and can be highly dispersed when used in the preparation of nanocomposite materials. CNC is mixed with poly(lactic acid) or PLA to generate biodegradable films with 0.2 and 0.5 wt%. Moreover, poly(vinyl alcohol) or PVA is used as a surfactant to improve the dispersion between CNC and PLA. As the results, CNC/PLA composite films have better mechanical properties, especially with 0.2wt% with PVA surfactant. The tensile strength and Youngs modulus increase about 7% and 12%, respectively, compare to neat PLA. The higher crystallinity of CNC also affects to improve thermal properties and water vapour barrier properties
Thammasat University. Thammasat University Library
Address:
BANGKOK
Email:
preserv@tu.ac.th
Name: Pakorn Opaprakasit
Role:
advisor
Name: Kittiwut Kasemwong
Role:
co-advisor
Created:
2015
Modified:
2021-11-06
Issued:
2021-11-06
วิทยานิพนธ์/Thesis
application/pdf
eng
DegreeName: Master of Engineering
Level: Master's Degree
Descipline: Engineering Technology
Grantor: Thammasat University
©copyrights Thammasat University
RightsAccess:
ใช้เวลา
0.036222 วินาที
Witita Laosamathikul
| Title | Contributor | Type |
|---|---|---|
| Development of PLA-based composites employing cellulose nanocrystals extracted from rice bran waste
มหาวิทยาลัยธรรมศาสตร์ Witita Laosamathikul | Pakorn Opaprakasit Kittiwut Kasemwong | วิทยานิพนธ์/Thesis |
Pakorn Opaprakasit
Kittiwut Kasemwong