Anti-Freeze Stabilizer System Based On Azidated Glycerol For Natural Rubber Latex
Natural rubber latex (NRL) normally transported to any destination in colloid / liquid form. It requires large storage containers such as drums and the probability of latex leakage during transportation to happen is higher. To prevent the latex spillage, the liquid form of NRL was transform into...
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my-usm-ep.598022024-02-05T00:58:13Z Anti-Freeze Stabilizer System Based On Azidated Glycerol For Natural Rubber Latex 2022-09 Abd Samat, Siti Nuraya T1-995 Technology(General) Natural rubber latex (NRL) normally transported to any destination in colloid / liquid form. It requires large storage containers such as drums and the probability of latex leakage during transportation to happen is higher. To prevent the latex spillage, the liquid form of NRL was transform into solid / frozen latex by freezing method. However, negatively charged protein layer that stabilized NRL particles may be broken by ice crystals during freezing and these destabilized NRL particles will form big lump after thawing. So, this study proposed a new low temperature of stabilizer named azidated glycerol (AG) that will be incorporated in NRL liquid before freezing process. It is expected that AG able to act as colloid stabilizer thus preventing the coalescence of rubber participles from occurring after thawing. AG was prepared by a chemical reaction of pure glycerol with sodium azide. The resulting AG was then added into NRL colloid as an anti-freeze stabilizer to prevent the rubber latex particles from coalesces at a lower temperature. NRL containing AG was then freeze at a temperature of -4 °C. After 24 hours of freezing, the frozen latex was thaw at ambient temperature for 1 hour followed by heating in a water bath at 40 °C for another 1 hour. 2022-09 Thesis http://eprints.usm.my/59802/ http://eprints.usm.my/59802/1/24%20Pages%20from%20SITI%20NURAYA%20BINTI%20ABD%20SAMAT.pdf application/pdf en public phd doctoral Perpustakaan Hamzah Sendut Pusat Pengajian Teknologi Industri |
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Universiti Sains Malaysia |
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USM Institutional Repository |
| language |
English |
| topic |
T1-995 Technology(General) |
| spellingShingle |
T1-995 Technology(General) Abd Samat, Siti Nuraya Anti-Freeze Stabilizer System Based On Azidated Glycerol For Natural Rubber Latex |
| description |
Natural rubber latex (NRL) normally transported to any destination in colloid /
liquid form. It requires large storage containers such as drums and the probability of
latex leakage during transportation to happen is higher. To prevent the latex spillage,
the liquid form of NRL was transform into solid / frozen latex by freezing method.
However, negatively charged protein layer that stabilized NRL particles may be
broken by ice crystals during freezing and these destabilized NRL particles will form
big lump after thawing. So, this study proposed a new low temperature of stabilizer
named azidated glycerol (AG) that will be incorporated in NRL liquid before freezing
process. It is expected that AG able to act as colloid stabilizer thus preventing the
coalescence of rubber participles from occurring after thawing. AG was prepared by a
chemical reaction of pure glycerol with sodium azide. The resulting AG was then
added into NRL colloid as an anti-freeze stabilizer to prevent the rubber latex
particles from coalesces at a lower temperature. NRL containing AG was then freeze
at a temperature of -4 °C. After 24 hours of freezing, the frozen latex was thaw at
ambient temperature for 1 hour followed by heating in a water bath at 40 °C for
another 1 hour. |
| format |
Thesis |
| qualification_name |
Doctor of Philosophy (PhD.) |
| qualification_level |
Doctorate |
| author |
Abd Samat, Siti Nuraya |
| author_facet |
Abd Samat, Siti Nuraya |
| author_sort |
Abd Samat, Siti Nuraya |
| title |
Anti-Freeze Stabilizer System Based On Azidated Glycerol For Natural Rubber Latex |
| title_short |
Anti-Freeze Stabilizer System Based On Azidated Glycerol For Natural Rubber Latex |
| title_full |
Anti-Freeze Stabilizer System Based On Azidated Glycerol For Natural Rubber Latex |
| title_fullStr |
Anti-Freeze Stabilizer System Based On Azidated Glycerol For Natural Rubber Latex |
| title_full_unstemmed |
Anti-Freeze Stabilizer System Based On Azidated Glycerol For Natural Rubber Latex |
| title_sort |
anti-freeze stabilizer system based on azidated glycerol for natural rubber latex |
| granting_institution |
Perpustakaan Hamzah Sendut |
| granting_department |
Pusat Pengajian Teknologi Industri |
| publishDate |
2022 |
| url |
http://eprints.usm.my/59802/1/24%20Pages%20from%20SITI%20NURAYA%20BINTI%20ABD%20SAMAT.pdf |
| _version_ |
1794024058797424640 |