scholarly journals Studies on Indigenous Cotton linters for Preparation of Carboxymethyl Cellulose

1970 ◽  
Vol 42 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Ismet Ara Jahan ◽  
Fahmida Sultana ◽  
M Nurul Islam ◽  
M Akram Hossain ◽  
Jainul Abedin
Keyword(s):  
Carboxymethyl Cellulose ◽  
Degree Of Substitution ◽  
Water Soluble ◽  
Suitable Method ◽  
Purification Method ◽  
Cellulosic Materials ◽  
Cotton Linters

Studies were carried out to find out a suitable method for preparation of carboxymethyl cellulose (CMC) from indigenous cotton linters. Special emphasis was given on purification method to remove most of the non-cellulosic materials. A twostep purification method of cotton linters for preparation of water soluble carboxymethyl cellulose (CMC) with degree of substitution (DS) 0.89 and viscosity 235 cp (0.5 % solution) have been described. Bangladesh J. Sci. Ind. Res. 42(1), 29-36, 2007

scholarly journals Characterization of Synthesized Sodium Carboxymethyl Cellulose with Variation of Solvent Mixture and Alkali Concentration

2019 ◽  
Vol 7 (22) ◽  
pp. 3878-3881
Author(s):  
Henny Sri Wahyuni ◽  
Sri Yuliasmi ◽  
Hanifah Siti Aisyah ◽  
Devi Riati
Keyword(s):  
Carboxymethyl Cellulose ◽  
Mixed Solvents ◽  
Solvent Mixture ◽  
Degree Of Substitution ◽  
Water Soluble ◽  
Synthesis Process ◽  
Alkali Concentration ◽  
Infrared Analysis ◽  
Coarse Powder ◽  
Organoleptic Test

BACKGROUND: CMC is one of the water-soluble polysaccharide derivatives obtained from cellulose. Alkalization and carboxymethylation process will influence the quality of the CMC. The use of a combination of mixed solvents and varying alkali concentrations in the synthesis process of CMC needs to be studied so that CMC can be synthesized with the proper characteristics. AIM: This study was conducted to determine the characteristics of carboxymethyl cellulose synthesized using various solvents and NaOH concentrations. METHODS: Carboxymethyl cellulose (CMC) was synthesized using solvent mixture, namely isopropanol: isobutanol (30: 70) and isopropanol:ethanol (50: 50) with varied concentration of NaOH of 5%, 10%, 15%, 20%, 25%, respectively. Synthesized CMC was characterized by an organoleptic test, pH, infrared analysis, and degree of substitution (DS). RESULTS: The result showed that characteristics of synthesized CMC were different from one another. The organoleptic test showed that synthesized CMC uses isopropanol: isobutanol (30: 70) was coarse powder, odourless and tasteless, ivory until burlywood along with increasing NaOH concentration; while the synthesized CMC with isopropanol: ethanol (50: 50) was a colourless, odourless, tasteless and fine powder. The pH of synthesized CMC was neutral. Infrared profile of synthesized CMC indicated the existence of carboxyl functional groups in 1600-1640 cm-1 region. The degree of substitution value of formula II-5, II-10, II-15, II-20, II-25, IE-5, IE-10, IE-15, IE-20, and IE-25 were 0.885;0.757; 0.685; 0.592; 0.575; 0.611; 0.906; 0.603; 0.671; 0.751, respectively. CONCLUSION:  Characteristics of CMC vary depending on the type of solvent mixture and NaOH concentrations used in synthesis. The more polarity of a solvent mixture the more colourless and higher DS value of synthesized CMC. On the other hand, the more alkali concentration in synthesis CMC the more colour and higher DS value was acquired.

scholarly journals Low And Highly Substituted Carboxymethyl Cellulose Synthesis From Powdered And Microcrystalline Cellulose

2020 ◽  
Vol 02 (10) ◽  
pp. 83-96
Author(s):  
Yuldoshov Sherzod Abdullaevich ◽  
◽  
Sarymsakov Abdushkur Abdukhalilovich ◽  
Keyword(s):  
Microcrystalline Cellulose ◽  
Carboxymethyl Cellulose ◽  
Degree Of Substitution ◽  
Water Soluble ◽  
Cellulose Synthesis ◽  
One Stage ◽  
Powder Cellulose ◽  
Substitution Degree ◽  
High Degree

The conditions for low and highly substituted water-soluble carboxymethyl cellulose synthesis based on microcrystalline and powder cellulose by the suspension method have been investigated. Accordingly, it was obtained CMC water-soluble samples with 0.38-0.40 substitution degree based on microcrystalline and powder cellulose. And at one stage, there were obtained CMC samples with a high degree of substitution (1.4) by carboxymethylation so called polyanionic cellulose.

scholarly journals Pemanfaatan kulit singkong sebagai bahan baku pembuatan Natrium Karbosimetil Selulosa

2018 ◽  
Vol 11 (3) ◽  
pp. 124
Author(s):  
Shella Permatasari Santoso ◽  
Niko Sanjaya ◽  
Aning Ayucitra
Keyword(s):  
Sodium Hydroxide ◽  
Carboxymethyl Cellulose ◽  
Isopropyl Alcohol ◽  
Degree Of Substitution ◽  
Raw Material ◽  
Sodium Carboxymethyl Cellulose ◽  
Carboxymethyl Cellulose Sodium ◽  
Alcohol Solvent ◽  
Cassava Peels ◽  
Cassava Peel

The use of cassava peels as raw material for Sodium Carboxymethyl Cellulose productionCassava peels are abundantly available and may be used as an lowcost cellulose source (80-85% cellulose per weight cassava peel). the study was to evaluate the effect of the concentration of sodium hydroxide, sodium chloroacetate, and temperature reaction on the sodium carboxymethyl cellulose (sodium-CMC) characteristics i.e. yield, purity, and degree of substitution in sodium-CMC preparation.  Sodium-CMC functional group was determined using FTIR spectrophotometer. Cassava peels was dried and grounded to 50 mesh. Lignin was eliminated from cassava peel by extraction of grounded cassava peel with 10% NaOH at 35 °C for 5 h. Cassava peel free lignin was then re-extracted using 10% of acetic acid and sodium chloride at 75 °C for 1 h, thus cellulose free hemicellulose was obtained. Alkalization at 30 °C for 90 min was performed by adding sodium hydroxyde at 10-40% to cellulose using isopropyl alcohol solvent. Following this, etherification was conducted by adding sodium chloroacetate of 1-5 g at 50-80 °C for 6 h. As result, the highest purity of sodium-CMC (96.20%) was obtained from alkalization using 20% of sodium hydroxide and etherification using 3 g sodium chloroacetate at 70 °C. Sodium-CMC yield was 22% and degree of substitution 0.705.Keywords: cassava peel, carboxymethyl cellulose, sodium-CMC, etherification AbstrakKulit singkong merupakan sumber selulosa yang berlimpah dan murah, dengan kadar selulosa 80-85% dari berat kulit singkong. Tujuan penelitian ini adalah memanfaatkan selulosa dalam kulit singkong sebagai bahan baku pembuatan natrium karboksimetil selulosa (Na-CMC), mempelajari pengaruh natrium hidroksida, natrium kloroasetat serta suhu pada karakteristik Na-CMC seperti perolehan, kemurnian, dan derajat substitusi, serta menentukan kondisi operasi optimum untuk pembuatan Na-CMC berdasarkan kemurnian Na-CMC terbesar. Gugus fungsi Na-CMC ditentukan menggunakan Fourier Transform Infrared Spectra. Mula-mula, kulit singkong dikeringkan dan dihancurkan sehingga berukuran 50 mesh. Kulit singkong diekstraksi dengan NaOH 10% di suhu 35 °C selama 5 jam, untuk melarutkan lignin. Kulit singkong bebas lignin diekstrak dengan asam asetat 10% dan natrium klorida dengan pemanasan 750 °C selama 1 jam untuk melarutkan hemiselulosa sehingga didapatkan selulosa. Alkalisasi dilakukan dengan mereaksikan selulosa dengan NaOH 10-40% dengan pelarut isopropil alkohol pada suhu 30 °C selama 90 menit, dilanjutkan eterifikasi dengan natrium kloroasetat 1-5 g pada suhu 50-80 °C selama 6 jam. Berdasarkan hasil penelitian, karakteristik Na-CMC terbaik didapatkan dari alkalisasi selulosa menggunakan NaOH 20% serta eterifikasi menggunakan 3 g natrium kloroasetat pada suhu 70 °C. Perolehan Na-CMC yang didapat adalah sebesar 22%, kemurnian 96,20%, derajat substitusi 0,705; termasuk dalam grade kedua menurut SNI 06-3736-1995.Kata kunci: kulit singkong, karboksimetil selulosa, Na-CMC, eterifikasi

Cellulosic Materials Characterisation of Kenaf Core from Retting Process Using Thermal Analysis

2015 ◽  
Vol 754-755 ◽  
pp. 1023-1027 ◽  
Author(s):  
A. Nor Munirah ◽  
M.T. Ramlah ◽  
A. Sharifah
Keyword(s):  
Thermal Analysis ◽  
Differential Scanning Calorimetry ◽  
Extraction Process ◽  
Water Soluble ◽  
Scanning Calorimetry ◽  
Cellulosic Materials ◽  
Kenaf Core ◽  
Thermal Gravimetry

The waste from the kenaf water retting; kenaf core can be used to create by-product. The characteristics of the kenaf are important to create new by-product. Cellulosic materials can be obtained from fibrous plants which known as cellulose, hemicelluloses, lignin, waxes, and several water-soluble compounds. Kenaf was categorized as one of the fibrous family plants. Hence, its cellulosic materials need to be determined before extraction process. This research was conducted to determine the cellulosic materials concentration in kenaf core using Thermal Gravimetry Analyzer (TGA) and Differential Scanning Calorimetry (DSC). As result, the percentage of degradation and decomposition of cellulosic materials were recorded and analyzed as reported in this paper.

Effect of the reaction conditions on the degree of substitution of carboxymethyl cellulose

1988 ◽  
Vol 266 (8) ◽  
pp. 716-720 ◽  
Author(s):  
F. K�lm�n ◽  
J. Borsa ◽  
S. Kem�ny ◽  
I. Ruszn�k
Keyword(s):  
Carboxymethyl Cellulose ◽  
Degree Of Substitution ◽  
Reaction Conditions

Analysis of the substituent distribution along the chain of water-soluble methyl cellulose by combination of enzymatic and chemical methods

Holzforschung ◽  
2004 ◽  
Vol 58 (1) ◽  
pp. 97-104 ◽  
Author(s):  
B. Saake ◽  
S. Lebioda ◽  
J. Puls
Keyword(s):  
Anion Exchange ◽  
Size Exclusion Chromatography ◽  
Methyl Cellulose ◽  
Anion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Degree Of Substitution ◽  
Water Soluble ◽  
Size Exclusion ◽  
Exclusion Chromatography ◽  
C Nmr

Abstract Four methyl cellulose samples in the degree of substitution range from 0.5 to 2.0 were characterised by combination of different analytical methods. Samples were analysed regarding their partial degree of substitution by hydrolysis and anion exchange chromatography with pulsed amperometric detection. For calibration of the chromatographic system, standard substances were isolated by preparative HPLC and their structure was confirmed by 13C-NMR spectroscopy. For two methyl cellulose samples per-acetylation and 13C-NMR with inverse gated decoupling was carried out for comparison with the chromatographic analysis. Endoglucanase fragmentation of methyl celluloses was performed and water-soluble and insoluble fractions were analysed separately. A preparative size exclusion chromatography system for enzymatic-degraded water-soluble methyl cellulose was developed and the molar masses of the individual fractions were examined by analytical size exclusion chromatography. By combination of endoglucanase fragmentation, preparative chromatography, hydrolysis and anion exchange chromatography an approach for the analysis of the substitutent distribution along the polymeric chain of water-soluble methyl cellulose could be established.

Sign in / Sign up

Export Citation Format

Share Document