MARC details
| 000 -LEADER |
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| fixed length control field |
04905nam a22003737i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
MY-KuUP |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20251125105556.0 |
| 006 - FIXED-LENGTH DATA ELEMENTS--ADDITIONAL MATERIAL CHARACTERISTICS |
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| fixed length control field |
a||||fr|||| 001 0 |
| 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION |
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| fixed length control field |
ta |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
200715t20202020my a|||fram|| 001 0 eng d |
| 020 ## - INTERNATIONAL STANDARD BOOK NUMBER |
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| International Standard Book Number |
THE0008553(Local) |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
UMP |
| Language of cataloging |
eng |
| Transcribing agency |
UMP |
| Description conventions |
rda |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
|---|
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
KK .A95 2020 r Thesis |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Norazlina Hashim, |
| Relator term |
author. |
| 245 10 - TITLE STATEMENT |
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| Title |
Thermal and biodegradable properties of poly(lactic acid)/ carbon-based nanocomposites / |
| Statement of responsibility, etc. |
Norazlina Hashim |
| 264 #1 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
|---|
| Place of production, publication, distribution, manufacture |
Kuantan, Pahang : |
| Name of producer, publisher, distributor, manufacturer |
UMP, |
| Date of production, publication, distribution, manufacture, or copyright notice |
2020 |
| 264 #4 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
|---|
| Place of production, publication, distribution, manufacture |
© 2020 |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
xix, 191 pages : |
| Other physical details |
illustrations (some color) ; |
| Dimensions |
30 cm. + |
| Accompanying material |
1 CD-ROM |
| 336 ## - CONTENT TYPE |
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| Content type term |
text |
| Source |
rdacontent |
| 336 ## - CONTENT TYPE |
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| Content type term |
text |
| Source |
rdacontent |
| 337 ## - MEDIA TYPE |
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| Media type term |
unmediated |
| Source |
rdamedia |
| 337 ## - MEDIA TYPE |
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| Media type term |
computer |
| Source |
rdamedia |
| 338 ## - CARRIER TYPE |
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| Carrier type term |
volume |
| Source |
rdacarrier |
| 338 ## - CARRIER TYPE |
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| Carrier type term |
computer disc |
| Source |
rdacarrier |
| 347 ## - DIGITAL FILE CHARACTERISTICS |
|---|
| File type |
text file |
| Encoding format |
PDF |
| Source |
rda |
| 500 ## - GENERAL NOTE |
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| General note |
College of Engineering |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Thesis (Doctor of Philosophy Chemical Engineering) -- Universiti Malaysia Pahang – 2020 |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Includes bibliographical references |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
Poly(lactic acid) (PLA) is a biodegradable plastic and grabs attention in several applications such as biomedical implantation, film, packaging and clothing. Unfortunately, PLA itself has brittle characteristic brings to poor mechanical properties and slow ability in degradation leads to waste disposal problem. The present research aims to develop material by using different technique of preparation that have a good combination of properties and optimum degradation ability. The PLA nanocomposites were prepared via melt and solution blending that was consisted of five different carbonbased materials, graphite (Gt), graphene oxide (GO), graphene (Gr), carbon nanotubes (CNTs) and modified CNTs (mCNTs). The effect of 5 wt.% poly (ethylene glycol) (PEG) as plasticizer on nanocomposites with carbon-based material loading at 0.5 wt.%, 1.0 wt.%, 1.5 wt.% and 2.0 wt.% were studied. The analysis of physical properties for both melt and solution blending methods were done using hardness testing and melt flow index (MFI). Neat PLA only gave around 69.0 to 77.6 Shore D in hardness test, while MFI exhibited around 36.1 to 39.4 g/10 min. PLA/mCNTs and PLA/PEG/mCNTs at 1.5 wt.% prepared by melt blending exhibited highest values of hardness testing which were 86.0 and 85.9 Shore D, respectively. In MFI study, the results were 70.0 g/10 min for PLA/mCNTs and 80.3 g/10 min for PLA/PEG/mCNTs. Result from solution blending method showed the maximum hardness values for PLA/mCNTs and PLA/PEG/mCNTs at 2.0 wt.% nanofiller loading, 82.7 and 76.2 Shore D, respectively. The PLA/PEG/GO showed the highest MFI, 73.1 g/10 min, while PLA/PEG/mCNTs recorded 70.5 g/10 min, both at 1.5 wt.% nanofiller loading. This proved that the PEG is useful in reducing the brittleness of nanocomposite. In further characterization, nanofiller at 1.5 wt.% of carbon-based loading was chosen for both melt and solution blending. The full exfoliation of CNTs and mCNTs in matrix observed from the X-ray Diffraction (XRD) analysis supported the excellent hardness and MFI properties. These nanocomposites also showed high thermal stability as obtained from Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) studies compared with neat PLA. The morphology study by Field Emission Scanning Electron Microscopy (FESEM) analysis confirmed these findings through the existence of smooth fracture surface especially when PEG was loaded as an evidence of good distribution of nanofiller in matrix was established. In soil degradation analysis, neat PLA exhibited low weight loss rate after 6 months. The addition of GO and mCNTs increased the biodegradation rate of nanocomposites, compared with unmodified fillers. When further comparison was made, the PEG also slightly enhanced the degradation rate of nanocomposites. PLA/PEG/1.5 wt.% mCNTs prepared from melt blending was selected as the most outstanding nanocomposite with high performing in MFI, hardness and high thermal stability. This nanocomposite was among of the nanocomposites that has high biodegradable rate, a significant finding in order to reduce the waste removal problem of polymer nowadays. Design Expert Software was used to examine the effect of immersion condition on weight loss of nanocomposite. In hydrolytic study, the condition at 65 oC of 28 days’ immersion in hydrochloric acid (HCl) at pH 3 gave 22.53 % of maximum weight loss. In summary, the results obtained showed that the method in preparation of PLA nanocomposites influenced the properties of mechanical, rheological, thermal and rate of biodegradation due to the dispersion quality of nanofiller in PLA matrix. |
| 610 20 - SUBJECT ADDED ENTRY--CORPORATE NAME |
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| Corporate name or jurisdiction name as entry element |
College of Engineering |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Universities and colleges |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
Theses |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Library of Congress Classification |
| Koha item type |
Thesis |