The cellulose nanocomposite as food packaging has been prepared from the isolated cellulose of corncobs waste. The cellulose in corncob powder was isolated through a standard isolation method with various acid and bases by the heating process. As many as 17.4% of cellulose was successfully isolated and characterized via FTIR spectroscopy, TGA and TEM. Furthermore, the isolated cellulose was partially dissolved in DMAC/ LiCl 8% and compressed at high temperature to produce the cellulose nanocomposite film. The isolated cellulose showed a similar functional group with the commercial cellulose, indicating the success of the isolation process. SEM analysis was conducted to several all-cellulose nanocomposites with various time of soaking. The best soaking time to perform was 60 min. showing a good result in morphological surface analysis. Moreover, the cellulose nanocomposite film exhibited as a good food packaging material to negate the microbes growth in food.
Pahae natural zeolite potentially can be used as a filtration
material
because of its high adsorption capacity. However, it is known that
other supportive materials such as activated charcoal are needed to
optimize the utilization of natural zeolite as an adsorber. This study
aims to investigate the potential use of activated charcoal which
was synthesized from cocoa shells waste and natural zeolite in nanosize
as the adsorber in order to increase the concentration of bioethanol.
The mixing process of nanozeolite and activated charcoal of cocoa
shells was carried out through mechanical mixing, while the nanofilter
was made using a press-printing technique followed by sintering at
several temperature variations. The results showed that the activated
zeolite produced in this study has a particle size of 118.4 nm with
water absorption capacity of 52.08%. In line with that, the bioethanol
concentration was increased up to 78.92% during the adsorption with
a 45 min contact time with water vapor. Thus, based on the results,
it can be concluded that nanosized zeolite-based adsorbents and activated
charcoal produced from cocoa shells can be utilized as adsorbers to
significantly increase the concentration of bioethanol generated.
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