000			02896nam a22003017a 4500
003			OSt
005			20250711152306.0
008			250711b |||||||| |||| 00| 0 eng d
040			_aTUPM _bEnglish _cTUPM _dTUPM _erda
050			_aBTH RB 37 _bC78 2025
100			_aCruz, Horace Vincent J. _eauthor
245			_aBiodegradable plastics from musa paradisiaca linn. With psidium guajava leaf extract for for food packaging/ _cHorace Vincent J. Cruz, Danica Faye C. Dulva, and Allen M. Galupo.--
260			_aManila: _bTechnological University of the Philippines, _c2025.
300			_axiii, 92pages: _c29cm.
336			_2rdacontent
337			_2rdamedia
338			_2rdacarrier
500			_aBachelor's thesis
502			_aCollege of Science.-- _bBachelor of applied science in laboratory technology: _cTechnological University of the Philippines, _d2025.
504			_aIncludes bibliographic references and index.
520			_aIn the present work, biodegradable plastics for food packaging were developed using starch and cellulose isolated from banana peel waste, with guava leaf extract to enhance antimicrobial properties. The starch and cellulose undergo chemical treatment such as acid, alkali, and bleaching treatment. The isolated starch and cellulose were first characterized using FTIR to confirm their presence and purity. The presence of peak at 3279cm-1 and 3293cm-1 corresponds to the OH group, while the peak 2931.42cm-1 and 2917.06cm corresponds to the C-H stretching of both cellulose and starch. Significant peaks such as C-O stretching and C-H vibration were also observed. The casting method involves the addition of guava leaf extract (0%, 2%, 4%, and 6%) that was added to the constant concentration of 5g of starch, 0.35g of cellulose, 1.2 mL of glycerol, and 1.2 mL of acetic acid. The resulting bioplastic was evaluated in terms of mechanical, chemical, and barrier properties. SEM imaging with 1000x magnification revealed surface variations dependent on guava leaf extract affecting mechanical and barrier properties. Results also revealed that the addition of guava leaf extract affects the thickness of film, tensile strength, water solubility, and water permeability. The thickness of the film ranged from 0.11 mm to 0.15mm. Tensile strength peaked at 6% GLE (0.069 MPa), although all samples did not meet the standard for bioplastic, which is 1.34 MPa. The biodegradability test showed consistent degradation after 7 days, confirming compostability. Antimicrobial results revealed that GLE was either not sufficiently concentrated or not effectively released from the bioplastic matrix under the test conditions.
650			_aCellulose
650			_aGuava extract
650			_aBiodegradable plastic
700			_aDulva, Danica Faye C. _eauthor
700			_aGalupo, Allen M. _eauthor
942			_2lcc _cBTH COS _n0
999			_c30310 _d30310