000 03725ntm a2200373 i 4500
001 vtls000103194
003 KUKTEM
005 20251117113400.0
008 180329s2018 my da f am 000 0 eng d
020 _aTHE0001328(Local)
039 9 _a201905141042
_basmadi
_y201803291541
_zsaini
040 _aUMP
_beng
_cUMP
_erda
090 _aFTeK .A84 2018 r Thesis
100 0 _aNur Athirah Sabarudin,
_eauthor.
245 1 0 _aExtraction of betacyanin from Bougainvillea glabra bract and the adsorption onto fibres /
_cNur Athirah Sabarudin
264 1 _aKuantan, Pahang :
_bUMP,
_c2018
264 4 _c© 2018
300 _axiv, 103 pages :
_billustrations (some color), chart ;
_c30 cm. +
_e1 CD-ROM
336 _atext
_2rdacontent
336 _atext
_2rdacontent
337 _aunmediated
_2rdamedia
337 _acomputer
_2rdamedia
338 _avolume
_2rdacarrier
338 _acomputer disc
_2rdacarrier
347 _atext file
_bPDF
_2rda
500 _aFaculty of Engineering Technology
502 _aThesis (Master of Science) -- Universiti Malaysia Pahang – 2018
504 _aIncludes bibliographical references
520 3 _aThe importance of using natural dyes is increasing worldwide. This is due to the perception of increased environmental and health risks associated with the processing and use of synthetic dyes. Bougainville glabra is known as a red-violet flower garden that contains betacyanin, a betalain pigment. However, the use of Bougainvillea glabra as a natural colouring of textiles is still unknown because of the lack of information on the compatibility in textile dyeing. This research carried out the extraction process of betacyanin from Bougainvillea glabra bracts and the adsorption of the dyes on the fibres. The focus of this study was to find the best dye extraction condition using Response Surface Methodology (RSM) and to determine the adsorption isotherm of dyes on the fibres. In order to determine the best condition of extraction process, one factor at time (OFAT) was studied that is pH (1.0, 4.0, 7.0, and 10.0), solid-liquid ratio (5:100, 7:100, 9:100, 11:100, 13:100, and 15:100) and extraction time (0-180 min) using solid-liquid extraction process. Colour intensity of the dyes and the functional groups of the samples were analyzed using UV-Vis Spectrophotometer and Fourier Transform Infra-Red Spectroscopy (FTIR). The determination of the effects initial concentration of dye and contact time for the adsorption process was studied. The findings have shown that extraction process was better in acidic condition at pH 4.0 than in alkaline, with solid-liquid ratio (SLR) of 11:100. The equilibrium time was achieved after 60 min of extraction process begins. The optimization process revealed that the best condition for betacyanin dye extraction was at 10:100 solid-liquid ratio (SLR) and extraction time of 60 min. From the results, it was estimated that 100 gram of bract can produce about 68.12 g of betacyanin. For adsorption process, spun silk has the highest affinity in retaining the dye compared to rayon and polyester-cotton. The adsorption process tells that spun silk is favourable to be dyed with natural dye compared to the synthetic fibre. The application of the isotherm model in predicting the adsorption capacity of natural dye shows that Freundlich model was fitted better than Langmuir model for describing the interaction between the dye and the fibres.
610 2 0 _aFaculty of Engineering Technology
_xDissertations
650 0 _aUniversities and colleges
_xDisertations
650 0 _aTheses
999 _aVIRTUA40
_c7715
_d7721
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