scholarly journals Modifikasi Serat Limbah Kubis Menjadi Nanokristalin Selulosa Melalui Metode Hidrolisis Asam

2018 ◽  
Vol 4 (2) ◽  
pp. 119-125 ◽  
Author(s):  
Andi Arjuna ◽  
Selva Natsir ◽  
Andi Amelia Khumaerah ◽  
Risfah Yulianty
Keyword(s):  
Natural Fiber ◽  
Crystallinity Index ◽  
Cellulose Fibers ◽  
Crystalline Cellulose ◽  
Preliminary Evaluation ◽  
Hydrolysis Method ◽  
South Sulawesi ◽  
Nano Crystalline ◽  
Natural Cellulose ◽  
Ft Ir

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.

scholarly journals Isolation and Characterization of Microcrystalline Cellulose and Preparation of Nano-Crystalline Cellulose from Tropical Water Hyacinth

2018 ◽  
Vol 31 (1) ◽  
pp. 180 ◽  
Author(s):  
Mohammed H. Abdul Latif ◽  
Yasir Fathi Mahmood
Keyword(s):  
Microcrystalline Cellulose ◽  
Water Hyacinth ◽  
Crystal Size ◽  
Crystallinity Index ◽  
Crystalline Cellulose ◽  
Gravimetric Analysis ◽  
Average Crystal Size ◽  
Isolation And Characterization ◽  
Nano Crystalline ◽  
Stretching Vibration

Because of the conservation problems causes by the existence of water hyacinth (W.H) as an watery plant in water bodies of Iraq, our study aimed to make  use of (W.H) by isolation of microcrystalline cellulose, and a new method of preparation of Nano crystalline cellulose. Microcrystalline cellulose was produced using base bleaching method by sodium hypochlorite [NaOCl] to remove unorganized region of cellulose and lignin to create particles comprising of micro crystal and preparing of Nano crystalline cellulose from microcrystalline cellulose by acid hydrolysis and ultrasonic treatment. The Nano crystalline and microcrystalline cellulose characterized by AFM, FTIR, XRD and TGA. FT-IR spectra of microcrystalline cellules and Nano crystalline cellulose show peaks at (1076.28, 1058.92) cm-1 and (1118.71, 1112.93) cm-1 refer to the stretching vibration of   C–O and stretching vibration intermolecular ester bonding.         The AFM image shows that isolated microcrystalline cellulose have a diameter of (141.37 nm) and the prepared Nano crystalline have a diameter of (87.39 nm). The Thermo gravimetric analysis of cellulose showed a high decomposition temperature at (283°C) for microcrystalline cellulose and (253)°C for Nano crystalline cellulose .The thermal stability of microcrystalline cellulose was more than Nano crystalline cellulose XRD result possessed a segal crystallinity index of 92.8 % and a average crystal size of 41.7 A ° for Nano crystalline cellulose and a Segal Crystallinity Index of 86.4 % and a average crystal size of 55.3°A    of microcrystalline cellulose.   

Preparation and Properties of Nano-Crystalline Cellulose Electro-Rheological Fluid

2015 ◽  
Vol 815 ◽  
pp. 217-221
Author(s):  
Ling Li Xu ◽  
Xing Ling Shi ◽  
Qing Liang Wang
Keyword(s):  
Room Temperature ◽  
Silicone Oil ◽  
Strong Acid ◽  
Crystalline Cellulose ◽  
Methyl Silicone ◽  
Shearing Stress ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nano Crystalline ◽  
Transmission Electron

nanocrystalline cellulose (NCC) was prepared from micro-crystalline cellulose (MCC) by strong acid hydrolysis. The characteristics of such particle were studied by transmission electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy. Electro-rheological fluids (ERF) were prepared by dispersing NCC and MCC in methyl-silicone oil, and their ER effects were measured. Experimental results indicated that NCC ERF exhibited a remarkable ER effect. The highest static shearing stress of NCC ERF (3.5 g/ml) was 5.1 kPa at the room temperature under a 4 .2 kV/mm electric field, increased about 5.5 times compared to MCC ERF, and sedimentation of NCC ERF was not observed even after 60 days.

Carbon Nanotube Templated Growth of the Nano-Crystalline NaY Zeolite

2011 ◽  
Vol 194-196 ◽  
pp. 594-597
Author(s):  
Ke Tang ◽  
Xin Hong ◽  
Jin Gang Qi
Keyword(s):  
Structural Characteristics ◽  
Internal Diameter ◽  
X Ray Diffraction ◽  
Nay Zeolite ◽  
Nano Crystalline ◽  
Transmission Electron ◽  
Ir Transmission ◽  
Ft Ir ◽  
Nay Zeolites ◽  
Nanosized Zeolites

FAU-type(NaY) zeolites nanocrystals have been synthesized through crystallization of gel in mesoporous system of carbon nanotubes(CNTS) with a internal diameter of 20~30 nm. Investigation by using X-ray diffraction (XRD), Fourier transform infrared (FT-IR), transmission electron microscope (TEM) shows that the nanocrystals possess the typical nanosized zeolites structural characteristics which is different from those of microsized zeolites.

scholarly journals Effect of Subsequent Dilute Acid and Enzymatic Hydrolysis on Reducing Sugar Production from Sugarcane Bagasse and Spent Citronella Biomass

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Robinson Timung ◽  
Narendra Naik Deshavath ◽  
Vaibhav V. Goud ◽  
Venkata V. Dasu
Keyword(s):  
Enzymatic Hydrolysis ◽  
Sugarcane Bagasse ◽  
Crystallinity Index ◽  
Sem Analysis ◽  
Reducing Sugar ◽  
Dilute Acid Pretreatment ◽  
Crystalline Cellulose ◽  
Dilute Acid ◽  
Acid Pretreatment ◽  
Hydrolysis Of

This work was aimed at investigating the effect of process parameters on dilute acid pretreatment and enzymatic hydrolysis of spent citronella biomass (after citronella oil extraction) and sugarcane bagasse on total reducing sugar (TRS) yield. In acid pretreatment, the parameters studied were acid concentration, temperature, and time. At the optimized condition (0.1 M H2SO4, 120°C, and 120 min), maximum TRS obtained was 452.27 mg·g−1and 487.50 mg·g−1for bagasse and citronella, respectively. Enzymatic hydrolysis of the pretreated biomass usingTrichoderma reesei26291 showed maximum TRS yield of 226.99 mg·g−1for citronella and 282.85 mg·g−1for bagasse at 10 FPU, 50°C, and 48 hr. The maximum crystallinity index (CI) of bagasse and citronella after acid pretreatment obtained from X-ray diffraction analysis was 64.41% and 56.18%, respectively. Decreased CI after enzymatic hydrolysis process to 37.28% and 34.16% for bagasse and citronella, respectively, revealed effective conversion of crystalline cellulose to glucose. SEM analysis of the untreated and treated biomass revealed significant hydrolysis of holocellulose and disruption of lignin.

Study on Photocatalytic Properties of Anatase Phase TiO2 Synthesized by Ultrasonic-Assisted Hydrolysis

2012 ◽  
Vol 573-574 ◽  
pp. 110-114 ◽  
Author(s):  
Jin Xia ◽  
Ri Ya Jin ◽  
Kai Xuan Guo ◽  
Si Jing Yang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Uv Light ◽  
Anatase Phase ◽  
Ultrasonic Method ◽  
X Ray Diffraction ◽  
Hydrolysis Method ◽  
Titanium Tetra Isopropoxide ◽  
Ultrasonic Assisted ◽  
Ft Ir

Titanium dioxide powders were synthesized by ultrasonic-assisted hydrolysis reaction of titanium tetra-isopropoxide at the low-temperature. The samples were characterized by Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction (XRD). The photocatalytic activity of samples were investigated by the degradation of methyl orange under UV light radiation (6W, λ= 352nm) at room temperature. The results indicated that the products were mainly composed of high homogeneity anatase phases, and the methyl orange degradation rate can reach more than 90% under ultraviolet irradiation 180min. The photocatalytic activity of the samples prepared by ultrasonic method is higher than that of the samples prepared by conventional hydrolysis method.

Research on Crystallinity, Morphology of Cotton Subjected to Enzyme and Crosslinking Treatment

2017 ◽  
Vol 893 ◽  
pp. 71-76 ◽  
Author(s):  
Md. Nahid Pervez ◽  
Faizan Shafiq ◽  
Muhammad Munib Jilani ◽  
Zahid Sarwar ◽  
Ying Jie Cai
Keyword(s):  
Crystalline Structure ◽  
Cotton Fiber ◽  
Crystallinity Index ◽  
Cotton Fibers ◽  
Cellulose I ◽  
X Ray ◽  
Cotton Fibres ◽  
Ft Ir ◽  
Crystalline Nature ◽  
Crosslinking Agents

This paper explores the effect of prior enzymatic treatment on non-formaldehyde crosslinked cotton fiber and crystalline structure of cotton fibers after enzyme, crosslinking and a combination of enzyme and crosslinking treatments were examined by X-ray diffractometer. Results showed that during crosslinking treatment crystallinity index (%) values were increased with reduced crystallinity size and crosslinked of enzyme treated cotton did not change the crystalline nature of cotton (i.e. it was Cellulose I). In addition, by analysing FT-IR and SEM data it is confirmed that uniform presence of crosslinking agents was visible on cotton fibres.

Extraction and characterisation of natural cellulose fibers from Kigelia africana

2020 ◽  
Vol 236 ◽  
pp. 115996 ◽  
Author(s):  
Manikandan Ilangovan ◽  
Vijaykumar Guna ◽  
B. Prajwal ◽  
Qiuran Jiang ◽  
Narendra Reddy
Keyword(s):  
Cellulose Fibers ◽  
Natural Cellulose
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