000			02596nam a2200253 a 4500
001			vtls000031314
003			KUKTEM
005			20251114204418.0
008			080829t2008 my a f m 000 0 eng|d
020			_aTHE0002266(Local)
039		9	_a201905241135 _bshamsul _c201107132241 _dVLOAD _c200908141526 _dVLOAD _c200908141456 _dVLOAD _y200808291016 _zida84
040			_aUMP
090			_aQP702.C5 S74 2008 rs Thesis
100	0		_aStephenie Ak Kalut
245	1	0	_aEnhancement of degree of deacetylation of chitin in chitosan production / _cStephenie Ak Kalut
246	3		_aEnhancement of degree of deacetylation of chitin in chitosan production _h[electronic resource]
260			_aKuantan, Pahang : _bUMP, _c2008
300			_a66 p. : _bill. (some col.) ; _c30 cm. + _e1 computer disc
502			_aProject paper (Bachelor of Chemical Engineering) --- Universiti Malaysia Pahang - 2008
520	3		_aChitosan is made from crustacean shells by a chemical process involving demineralization, deproteinization, decolorization, and deacetylation. The process of deacetylation involves the removal of acetyl groups from the molecular chain of chitin, leaving behind a complete amino group (-NH) and chitosan versatility depends mainly on this high degree chemical reactive amino groups. The purpose of this research is to observe the parameters that can enhance the degree of deacetylation of chitosan production to the highest percentage. The observed parameters are the temperature of heating, concentration of sodium hydroxide, and the time of heating. The obtained chitin was converted into the more useful soluble chitosan by reaction with sodium hydroxide (NaOH) solution of various concentrations, then the alkaline chitin was heated in an autoclave with different time and temperature of heating which dramatically reduced the time of deacetylation. The method used to determine the degree of deacetylation of chitosan is the linear potentiometric titration. From the result, the highest degree of deacetylation can be achieved at the temperature of 1342oC, and 70% concentration of sodium hydroxide with DDA% of 98.38% and 98.79% respectively. It took only 10 minutes to also achieve highest degree of deacetylation, 89.05%. In conclusion, the increasing of temperature and concentration of sodium hydroxide will increase the degree of deacetylation of chitin. The increasing of time of heating will decrease the degree of deacetylation. -Author
650		0	_aChitin
650		0	_aChitosan
999			_aVIRTUA40 _c1591 _d1597
999			_aVTLSSORT0080*0200*0400*0900*1000*2450*2460*2600*3000*5020*5200*6500*6501*9992