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Title: A comparative study on surface and foam properties of natural and synthetic surfactants and characterization of natural surfactants
Researcher: Pradhan, Ambika
Guide(s): Bhattacharyya, Amitabha
Keywords: Industrial applications
Natural and Synthetic surfactants
Physical Sciences,Physics,Physics Atomic Molecular and Chemical
Surface and Foam properties
University: Sikkim University
Completed Date: 2019
Abstract: Surfactants or surface active agents are molecules exhibiting various interfacial newlineactivities. Amphiphilicity of surfactants is responsible for surface tension newlinereduction, exhibiting a wide range of pharmaceutical and industrial applications. newlineFoaming is an important property of surfactants. Foam is a system of newlinegas phase distributed in a liquid phase. They have varied applications in the newlineeveryday world. Synthetic surfactants are used extensively today. After use, newlinethey enter the aquatic environment and cause damage. Keeping in view the newlineenvironmental burden, it is desirable to substitute synthetic surfactants with newlinenaturally obtained molecules as renewable and bio-compatible alternatives. newlineIn search of such alternatives, I have investigated a few plant based natural newlinesurfactants.This thesis presents detailed investigations of surface and foam properties newlineof natural surfactants extracted from Sapindus mukorossi, Albizia procera, newlineZephyranthes carinata, Acacia concinna and Juglans regia. Some synthetic newlinesurfactants have been studied as a reference. In addition, I have also performed newlinepreliminary characterization of the natural surfactants using Thin newlineLayer Chromatography (TLC), Column Chromatography (CC), High Performance newlineLiquid Chromatography (HPLC), UV-Visible Spectroscopy (UVVis), newlineFourier Transform Infrared Spectroscopy(FTIR) and Gas Chromatography newlineMass Spectrometry (GC-MS). Also, the thesis discusses one shot newlinetwo dimensional drainage in foams using natural surfactant systems. While newlineSapindus mukorossi and Acacia concinna have been studied earlier, this thesis gives the first ever reports on surfactant activities of Albizia procera, newlineZephyranthes carinata and Juglans regia. newlineThe surface tension studies reveal that good surface tension reduction newlinewas observed for all the natural surfactants with a low critical micelle concentration newline(CMC). The natural surfactants are acid balanced and exhibited newlinegood wetting ability. Juglans regia is an exception. On addition of salt, the newlinefoaming increases and then decreases when surfactant concent
Pagination: 207 p.
Appears in Departments:Department of Physics

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01_title.pdfAttached File418.92 kBAdobe PDFView/Open
02_acknowledgement.pdf41.67 kBAdobe PDFView/Open
03_abstract.pdf37.09 kBAdobe PDFView/Open
04_list of publications.pdf33.88 kBAdobe PDFView/Open
05_contents.pdf43.48 kBAdobe PDFView/Open
06_list_of_figures.pdf54.09 kBAdobe PDFView/Open
07_list_of_tables.pdf43.05 kBAdobe PDFView/Open
08_abbreviations.pdf33.63 kBAdobe PDFView/Open
09_chapter1.pdf96.06 kBAdobe PDFView/Open
10_chapter2.pdf1.84 MBAdobe PDFView/Open
11_chapter3.pdf6.98 MBAdobe PDFView/Open
12_chapter4.pdf1.65 MBAdobe PDFView/Open
13_chapter5.pdf178.73 kBAdobe PDFView/Open
14_chapter6.pdf5.88 MBAdobe PDFView/Open
15_chapter7.pdf2.64 MBAdobe PDFView/Open
16_conclusion.pdf45.57 kBAdobe PDFView/Open
17_appendix.pdf2.21 MBAdobe PDFView/Open
18_bibliography.pdf116.47 kBAdobe PDFView/Open

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