Production of cellulose acetate from acacia mangium for wood coating lacquer
Cellulose acetate (CA) is a semi-synthetic industrial fiber that has a wide-range of application that includes materials for molded goods and fabrics, as well as filter membrane, cigarette tow, and coating. This study focuses on the production of coating from Acacia mangium-produced cellulose ace...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/17509/1/Production%20of%20cellulose%20acetate%20from.pdf |
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| Summary: | Cellulose acetate (CA) is a semi-synthetic industrial fiber that has a wide-range of
application that includes materials for molded goods and fabrics, as well as filter
membrane, cigarette tow, and coating. This study focuses on the production of
coating from Acacia mangium-produced cellulose acetate. It covers the selection of
the A. mangium fibers for development into the intermediate CA, followed by the
optimum condition for the production of CA, and finally the performance of the end
product of the Acacia mangium-based CA for wood coating. The fiber characteristic
of the A. mangium wood and pulp fiber was determined and compared, where the
pulp fiber was shown to potentially be a better material in the development of CA
due to the higher cellulose composition of nearly 100% of percentage difference if
compared to the wood fibers. Structurally, the pulp also displays better fibrillated
structure and slightly higher derived value compared to the wood fiber for the fiber
dimensions, with percentage difference not more than 10% for most. The selected
form of pulp fiber underwent acetylation process through the reaction with acetic
anhydride and acetic acid, where certain condition was manipulated, which includes
the pretreatment process, amount of catalyst, pulp particle size, and reaction time
to obtain the optimum condition. The result shows the pretreated A. mangium pulp
fiber of 200-mesh size that underwent 36 hours of acetylation, with the highest
catalyst usage of 0.10 ml earned the most ideal DS of 2.81, in the development of
coatings. The formation of the acetate lacquer coating loosely follows the U.S.
patent no. 2426379 that includes the fusion of melamine formaldehyde and ethyl
acetate. The performance of the A. mangium cellulose acetate (AMCA) lacquer was
evaluated and compared with a control lacquer that was produced from a
commercial CA (CCA), based on the mechanical and physical performance. The
AMCA lacquer is proven to be on par or better than that of CCA lacquer with better
staining resistance and lower water absorption rate for the physical, and a higher
durability for the impact, abrasion, and hardness test for the mechanical
performance. These properties further justify the ergonomics of the most abundant
organic compound on Earth, which is the cellulose, as an alternative for petroleum based
products while indicating the feasibility of a wide-range unconventional
product development of the A. mangium species as a whole. |
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