Modifikasi Serat Limbah Kubis Menjadi Nanokristalin Selulosa Melalui Metode Hidrolisis Asam

Abstract

As one of vegetable plants in South Sulawesi, cabbage (Brassica oleracea L.) crops has generated cellulose fibers biomass which is potentially modified into nano-crystalline cellulose, a valuable material in the pharmaceutical formula. Therefore, this study aims to manipulate the natural cellulose fibers of cabbage biomass through acid hydrolysis method within product preliminary evaluation through FT-IR and XRD. The fibers were modified through the bleaching process produce micro crystalline cellulose, which was then hydrolyzed with 65% sulfuric acid to obtain nanocrystalline cellulose. The products have yellow pale to brown colour, with a yield of 10.06% and 31.16% respectively. Based on FT-IR spectra, both products inherit cellulose characteristics, C-O (1232.16 cm-1); C = O (1743.65 cm-1); -OH (1625.99 cm-1); C-H (2920.23 cm-1); O-H (3414 cm-1). The increasing trend of crystallinity index during the process was also observed in XRD diffractogram. It is identifiable from 7.41% for natural fiber, 69.68% for crystalline microcrystalline, and 78.01% for nano crystalline cellulose. Through Match®, the estimated crystalline product size reaches 58.91 nm.

Development of Mycrocrystalline Cellulose Originate From Sago (Metroxylon Sagu) Stem Bark by Hydrolisis Methode Using Nitric Acid

“…The weighing bottle cap was opened during drying and immediately closed upon completion, cooled inside the desiccator until the remaining constant weight was obtained. The drying shrinkage requirement should not more than 6% [23,24]. X = (𝐴)−(𝐴) 𝐴 100% (𝐴) A = sample before drying (g) B = sample after drying (g)…”

“…To the sample 0.2 g of MCC, NaOH 1N was added, stirred (5 min), and allowed to stand for 24 h (-20 °C). At the assay, the sample was stirred for 5 min and solubility were observed as the number of saple absorbances [23,24].…”

“…MCC sample as much as 2g was weighed and added by 5 ml of HCl 2N solution, stirred (5 min) and observed for the solubility with the procedure as explained in the assay of sample in NaOH [23,24].…”

“…MCC sample as much as 5g was weighed and added by 5 ml of ether and stirred for 5 min until it is ready for solubility observation with the former procedure as explained in the assay of sample for solubility tests [23,24].…”

Research mapping of Indonesia nano-lignocellulose fiber studies and its potential for industrial application

“…Throughout the eleven five years, there was an increase trend of NLCFs studies, and that would presumably increase in the next few years. From Supplementary Data I, NCC and NFC have mounted since 2016 because those NLCF types were easily isolated with acid hydrolysis, ultrasonication, and high pressure homogenizer [4,9,14]. These methods also allowed to manufacture nanostructured fibers below 100 nm.…”