Kelakuan fasa dan reologi lelemak alkohol sulfat, lelemak alkohol eter sulfat berasaskan sawit dan campuran dengan surfaktan lain

Translated title of the contribution: Phase behavior and rheology of fatty alcohol sulphate, fatty alcohol ether sulphate from palm based and mixtures with other surfactants

Liew Kin Hong, Nur Syazani Harun, Mohd. Suzeren Md. Jamil, Muhammad Rahimi Usop

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The phase diagrams of fatty alcohol sulphate (FAS)/ fatty alcohol ether sulphate (FAES)/soap (4.5:4.5:1.0)/propylene glycol/water mixtures were established at 60 °C. The birefringence was observed under cross polarisers and their phases changes examined under a polarized microscope. The results showed that the liquid crystalline region for FAS and FAES occurred only in a small region. The optical patterns of lamellar liquid crystal were identified as oily streaks structure. The rheological tests of lamellar liquid crystal were carried out in the region of 4.5/4.5/1 FAES/FAS/soap with 0% PG and 10% of water. The rheological tests used were flow curve, 3 interval thixotropy test (3ITT), oscillation (dynamic test) stress sweep test and frequency sweep test measurement done using a cone-plate sensor (25mm, 1°). The flow curve was fitted to a Casson model to obtain values for the consistency coefficient and the flow behavior index. The lamellar liquid crystal show typical flow behavior and stress influenced the recovery of the structure. Linear visco-elastic (LVE) range analysis show the critical stress value at 0.475%, and elastic modulus was dominant over an angular frequency range studied.

Original languageUndefined/Unknown
Pages (from-to)101-108
Number of pages8
JournalMalaysian Journal of Analytical Sciences
Volume17
Issue number1
Publication statusPublished - 2013

Fingerprint

Fatty Alcohols
Phase behavior
Rheology
Surface-Active Agents
Ether
Sulfates
Liquid Crystals
Soaps (detergents)
Propylene Glycol
Water
Birefringence
Phase diagrams
Cones
Microscopes
Elastic moduli
Crystalline materials
Recovery
Sensors
Liquids

Keywords

  • FAES
  • FAS
  • Lamellar liquid crystal
  • Rheology
  • Ternary phase diagram

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

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title = "Kelakuan fasa dan reologi lelemak alkohol sulfat, lelemak alkohol eter sulfat berasaskan sawit dan campuran dengan surfaktan lain",
abstract = "The phase diagrams of fatty alcohol sulphate (FAS)/ fatty alcohol ether sulphate (FAES)/soap (4.5:4.5:1.0)/propylene glycol/water mixtures were established at 60 °C. The birefringence was observed under cross polarisers and their phases changes examined under a polarized microscope. The results showed that the liquid crystalline region for FAS and FAES occurred only in a small region. The optical patterns of lamellar liquid crystal were identified as oily streaks structure. The rheological tests of lamellar liquid crystal were carried out in the region of 4.5/4.5/1 FAES/FAS/soap with 0{\%} PG and 10{\%} of water. The rheological tests used were flow curve, 3 interval thixotropy test (3ITT), oscillation (dynamic test) stress sweep test and frequency sweep test measurement done using a cone-plate sensor (25mm, 1°). The flow curve was fitted to a Casson model to obtain values for the consistency coefficient and the flow behavior index. The lamellar liquid crystal show typical flow behavior and stress influenced the recovery of the structure. Linear visco-elastic (LVE) range analysis show the critical stress value at 0.475{\%}, and elastic modulus was dominant over an angular frequency range studied.",
keywords = "FAES, FAS, Lamellar liquid crystal, Rheology, Ternary phase diagram",
author = "Hong, {Liew Kin} and Harun, {Nur Syazani} and {Md. Jamil}, {Mohd. Suzeren} and Usop, {Muhammad Rahimi}",
year = "2013",
language = "Undefined/Unknown",
volume = "17",
pages = "101--108",
journal = "Malaysian Journal of Analytical Sciences",
issn = "1394-2506",
publisher = "Faculty of Science and Technology, Universiti Kebangsaan Malaysia",
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T1 - Kelakuan fasa dan reologi lelemak alkohol sulfat, lelemak alkohol eter sulfat berasaskan sawit dan campuran dengan surfaktan lain

AU - Hong, Liew Kin

AU - Harun, Nur Syazani

AU - Md. Jamil, Mohd. Suzeren

AU - Usop, Muhammad Rahimi

PY - 2013

Y1 - 2013

N2 - The phase diagrams of fatty alcohol sulphate (FAS)/ fatty alcohol ether sulphate (FAES)/soap (4.5:4.5:1.0)/propylene glycol/water mixtures were established at 60 °C. The birefringence was observed under cross polarisers and their phases changes examined under a polarized microscope. The results showed that the liquid crystalline region for FAS and FAES occurred only in a small region. The optical patterns of lamellar liquid crystal were identified as oily streaks structure. The rheological tests of lamellar liquid crystal were carried out in the region of 4.5/4.5/1 FAES/FAS/soap with 0% PG and 10% of water. The rheological tests used were flow curve, 3 interval thixotropy test (3ITT), oscillation (dynamic test) stress sweep test and frequency sweep test measurement done using a cone-plate sensor (25mm, 1°). The flow curve was fitted to a Casson model to obtain values for the consistency coefficient and the flow behavior index. The lamellar liquid crystal show typical flow behavior and stress influenced the recovery of the structure. Linear visco-elastic (LVE) range analysis show the critical stress value at 0.475%, and elastic modulus was dominant over an angular frequency range studied.

AB - The phase diagrams of fatty alcohol sulphate (FAS)/ fatty alcohol ether sulphate (FAES)/soap (4.5:4.5:1.0)/propylene glycol/water mixtures were established at 60 °C. The birefringence was observed under cross polarisers and their phases changes examined under a polarized microscope. The results showed that the liquid crystalline region for FAS and FAES occurred only in a small region. The optical patterns of lamellar liquid crystal were identified as oily streaks structure. The rheological tests of lamellar liquid crystal were carried out in the region of 4.5/4.5/1 FAES/FAS/soap with 0% PG and 10% of water. The rheological tests used were flow curve, 3 interval thixotropy test (3ITT), oscillation (dynamic test) stress sweep test and frequency sweep test measurement done using a cone-plate sensor (25mm, 1°). The flow curve was fitted to a Casson model to obtain values for the consistency coefficient and the flow behavior index. The lamellar liquid crystal show typical flow behavior and stress influenced the recovery of the structure. Linear visco-elastic (LVE) range analysis show the critical stress value at 0.475%, and elastic modulus was dominant over an angular frequency range studied.

KW - FAES

KW - FAS

KW - Lamellar liquid crystal

KW - Rheology

KW - Ternary phase diagram

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