scholarly journals Preparation and Characterization of Chitosan-Gelatin-Glycerol Biocomposite for Primary Wound Dressing

Author(s):  
Suryati Suryati ◽  
Meriatna Meriatna ◽  
Sulhatun Sulhatun ◽  
Dwi Ayu Lestari

Rice straw is one of material containing cellulose to produce Carboxymethyl Cellulose (CMC). CMC is a non toxic polysaccharide that produces from cellulose that widely used in the pharmaceutical, food, textile, detergent, and cosmetic products industries. There are two stages usually use to produce CMC which are mercerization and esterification processes. Rice straw waste is one of the materials to produce CMC, it has a cellulose content of 37.7%, hemi-cellulose 21.99%, and lignin 16.62 %.  BPS Aceh shown that the total rice harvested area was 310.01 hectares, with a total production of 1.71 million tons, and rice produced at 982.57 thousand ton. This study aims to reduce waste and environmental pollution caused by rice straw and collects information of rice straw as a basic material to produce of carboxymethyl cellulose and to increase the economic value of rice straw.  The effects of various wieght parameters sodium monochloroacetate on chemical properties of CMC that produce from rice straw were investigated in this research. Rice straw was collected from a rice field in Nisam, North Aceh. The research conducted by synthesizing 5 grams rice straw for 5.5 hours using NaOH and Sodium Monochloroacetate solutions. With variations weight of sodium monochloroacetate are 5,6,7,8 and 9 grams. The characterization of CMC was carried out by Fourier Transform Infrared (FTIR), CMC yield, DS, Viscosity, water content, pH. The result shows that addition of sodium monochloroacetate was significant factors influence the chemical properties on CMC. The CMC that produced in this study achieved to National Indonesia Standard (SNI).

Author(s):  
Masrullita Masrullita ◽  
Rizka Nurlaila ◽  
Zulmiardi Zulmiardi ◽  
Ferri Safriwardy ◽  
Auliani Auliani ◽  
...  

Rice straw is one of material containing cellulose to produce Carboxymethyl Cellulose (CMC). CMC is a non toxic polysaccharide that produces from cellulose that widely used in the pharmaceutical, food, textile, detergent, and cosmetic products industries. There are two stages usually use to produce CMC which are mercerization and esterification processes. Rice straw waste is one of the materials to produce CMC, it has a cellulose content of 37.7%, hemi-cellulose 21.99%, and lignin 16.62 %.  BPS Aceh shown that the total rice harvested area was 310.01 hectares, with a total production of 1.71 million tons, and rice produced at 982.57 thousand ton. This study aims to reduce waste and environmental pollution caused by rice straw and collects information of rice straw as a basic material to produce of carboxymethyl cellulose and to increase the economic value of rice straw.  The effects of various wieght parameters sodium monochloroacetate on chemical properties of CMC that produce from rice straw were investigated in this research. Rice straw was collected from a rice field in Nisam, North Aceh. The research conducted by synthesizing 5 grams rice straw for 5.5 hours using NaOH and Sodium Monochloroacetate solutions. With variations weight of sodium monochloroacetate are 5,6,7,8 and 9 grams. The characterization of CMC was carried out by Fourier Transform Infrared (FTIR), CMC yield, DS, Viscosity, water content, pH. The result shows that addition of sodium monochloroacetate was significant factors influence the chemical properties on CMC. The CMC that produced in this study achieved to National Indonesia Standard (SNI).


2021 ◽  
Vol 15 (2) ◽  
pp. 194
Author(s):  
RIZKA NURLAILA

Rice straw is a waste from rice plants that contains 37.71% cellulose, 21.99% hemicellulose, and 16.62% lignin. High cellulose content in rice straw can be used as raw material for the manufacture of Carboxymethyl Cellulose (CMC). CMC is a cellulose derivative widely used in food, pharmaceutical, detergent, textile and cosmetic products industries as a thickener, stabilizer of emulsions, or suspensions and bonding. This study aims to process rice straw waste into CMC with variations in sodium monochloroacetate of 5,6,7,8 and 9 grams. The method used in this research is by synthesis using 15% NaOH solvent, with a reaction time of 3.5 hours and 5 grams of rice straw. The results showed that the best CMC was obtained at a concentration of 9 grams of sodium monochloroacete with a yield characterization of 94%, pH 6, water content of 13.39%, degree of substitution (Ds) of 0.80, and viscosity of 1.265 cP.


2017 ◽  
Vol 37 (2) ◽  
pp. 132
Author(s):  
Dewi Maya Maharani ◽  
Lisa Normalasari ◽  
Dianita Kumalasari ◽  
Chandra Ardin Hersandi Prakoso ◽  
Mutiara Kusumaningtyas ◽  
...  

Cellulose is a potential biomass that is used for bioethanol production and commonly present in agricultural residues like rice straw. Cellulose is an important material to produce glucose and bioethanol, but it is covered by lignin and hemicellulose bonds to form a lignocellulose.  Bioethanol production using basic material containing cellulose requires special attention in the process of pretreatment for lignin degradation process and increase the accessible surface and decrystallize cellulose. The aim of this research was to apply alkalization and resistive heating combine method for rice straw pretreatment process before further being converted into bioethanol and to determine the effects of heating temperature and NaOH concentration on the content of  lignin, cellulose, and hemicellulose. The reactor had been designed for resistive heating process. Rice straw that was resized into 100 mesh has dissolved with 0.03 M, 0.05 M, and 0.07 M NaOH and heated with resistive heating temperature of 75 oC, 85 oC, and 99 oC. Cellulose is a raw material that will be further converted into glucose. So that, the selected optimum conditions of this study were  pretreatment with the highest increase of cellulose content level until 8.88% and resulted decreasing levels of lignin (1.39%) and hemicellulose (4.33%) by temperature  75 oC and 0.07 M NaOH concentration. Resistive heating that combine with alkalization can be used for rice straw pretreatment process that reduce lignin and hemicellulose content as well as increasing cellulose content. ABSTRAKSelulosa merupakan biomassa yang potensial digunakan untuk produksi bioetanol dan banyak ditemukan di residu pertanian seperti jerami padi. Selulosa merupakan material penting yang dapat dikonversi menjadi glukosa kemudian dikonversi menjadi bioetanol, namun selulosa pada alam dilapisi oleh ikatan lignin dan hemiselulosa menjadi lignoselulosa. Pembuatan bioetanol berbasis selulosa membutuhkan proses pretreatment yang berfungsi untuk mendegradasi ikatan lignin, meningkatkan luas permukaan biomassa dan dekristalisasi selulosa. Tujuan dari penelitian ini adalah mengetahui pengaruh alkalisasi resistive heating pada proses pretreatment jerami padi sebelum dikonversi lebih lanjut menjadi bioetanol dan mengetahui pengaruh suhu pemanasan serta konsentrasi NaOH selama pretreatment terhadap perubahan kandungan lignin, selulosa dan hemiselulosa. Sebelum dilakukan penelitian dilakukan perancangan reaktor resistive heating. Jerami padi ukuran 100 mesh dilarutkan pada larutan NaOH dengan variasi konsentrasi 0,03 M, 0,05 M, dan 0,07 M, selanjutnya dipanaskan pada reaktor resistive heating dengan variasi suhu pemanasan 75 oC, 85 oC, dan 99 oC. Selulosa merupakan senyawa yang akan dikonversi lebih lanjut menjadi glukosa. Sehingga pada penelitian ini dipilih kondisi optimum berdasarkan peningkatan selulosa tertinggi hingga 8,88% serta penurunan lignin dan hemiselulosa sebesar 1,39% dan 4,33% pada perlakuan suhu pemanasan 75 oC dan konsentrasi NaOH 0,07 M. Alkalisasi resistive heating dapat diterapkan pada pretreatment jerami padi karena dapat mengurangi kandungan lignin dan hemiselulosa serta meningkatkan kandungan selulosa.


2018 ◽  
Vol 8 (1) ◽  
pp. 53-61
Author(s):  
Devi Silsia ◽  
Zulman Efendi ◽  
Febri Timotius

Midrib is one of the palm plantation  waste that has not been utilized optimally. The high cellulose content of palm midrib is potentially converted to carboxymethyl cellulose. This study aims to determine the characteristics of carboxymethyl cellulose that produced from various concentrations of trichloroacetic acid and reaction times. This study used a complete randomized design (RAL) with two factors i.e tricloroacetic acid concentration (10%, 20% and 30%) and reaction time (3 hours and 4 hours). The synthesis of carboxymethyl cellulose in this study consists of three stages i.e alkalization, carboxymethylation and purification. The carboxymethyl cellulose obtained was characterized include degree of subsitution (DS), pH, viscosity, water content, and purity. The results showed that the best carboxymethyl cellulose was obtained from the use of 20% tricloroacetic acid and 3 hours reaction time. The characterrization result include substitution degree value of 0.76, pH of 8.32, water content of 7.1%, with a  viscosity of 7.8 cP,   and purity of 92.62%. 


2018 ◽  
Vol 42 (3) ◽  
Author(s):  
Graziela Baptista Vidaurre ◽  
Benedito Rocha Vital ◽  
Jorge Luiz Colodette ◽  
Angélica de Cássia Oliveira ◽  
João Gabriel Missia da Silva ◽  
...  

ABSTRACT The objective of this study was to determine the effects of tree age and of pith-bark and base-top positions on anatomical characteristics, and the effect of age on the chemical components of Schizolobium amazonicum (Paricá wood). The material was obtained from commercial plantations in the states of Maranhão and Pará with ages of 5, 7, 9 and 11 years. The first three logs (2.7 m length each) were obtained from the trees of each age. Only the effect of age was analyzed for the chemical characterization of the wood. The dimensions of the fibers increased along the pith-bark direction, while wall thickness decreased and the length of the fibers increased with aging. The width of the fibers and the lume diameter increased in the base-top direction. Paricá wood presented low extractive and hemicellulose content, and high cellulose content. The anatomical characteristics were more affected by the factors under study than the chemical composition, evidencing that the chemical elements of the wood are more stable with aging in relation to the anatomical characteristics.


2019 ◽  
Vol 4 (1) ◽  
pp. 40
Author(s):  
Annazmil Fayros Latifah ◽  
Eny Yulianti ◽  
Lilik Miftahul Khoiroh

<em>Corn stalk has a high cellulose content, so that it is potential to be used as a composition for making alginate-carboxymethyl cellulose beads. Alginate and cellulose are biodegradable, renewable and non-meltable polymers that have wide applications in various industrial sectors. The purpose of this study was to determine the effect of crosslinking agent C<sub>4</sub>H<sub>6</sub>O<sub>4</sub>Zn on the adsorption and shape of beads. The varied concentrations of C<sub>4</sub>H<sub>6</sub>O<sub>4</sub>Zn are 3%; 5% and 10%. Characterization of alginate-carboxymethyl cellulose beads composites using Fourier Transform InfraRed (FTIR), and Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX).</em> <em>Based on research, the highest swelling value is obtained at 5% C<sub>4</sub>H<sub>6</sub>O<sub>4</sub>Zn crosslink which is 59.68%. FTIR data shows the appearance of wave numbers at 1413 cm<sup>-1</sup> which indicates the presence of C-O Na groups, while at wave number 458 cm<sup>-1</sup> indicates the presence of Zn-O groups. SEM-EDX data with a 5% C<sub>4</sub>H<sub>6</sub>O<sub>4</sub>Zn crosslink has a round shape with a wrinkled surface, multiple grooves causing a non-homogeneous surface. Whereas in C<sub>4</sub>H<sub>6</sub>O<sub>4</sub>Zn 10% the surface is almost smooth</em>


2020 ◽  
Author(s):  
Nor Nadiha ◽  
M. Z . ◽  
Jamilah B

Local production of agricultural waste is increasing. It is not fully  utilized  and  can cause an environmental issue if it is not handle wisely. Thus, it is important to increase utilization of lignocellulosic biomass by improving their added value and subsequently decrease the agriculture waste. In this study, rice straw and Leucaena leucocephala were subjected to alkali treatment (4% sodium hydroxide) with different concentration ratio of samples to sodium hydroxide (1:10 to 1:50). The physical and chemical properties of extracted hemicelluloses were studied. The yield of hemicellulose was higher from rice straw compared to Leucaena leucocephala. The chemical functional groups present in hemicellulose were confirmed by Fourier tranform infrared spectroscopy (FTIR). The surface morphology and roughness of xylan were examined by scanning electron microscopy (SEM). Keywords: rice straw, hemicellulose, sodium hydroxide, alkali


Polymers ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 605 ◽  
Author(s):  
Jungmin Lee ◽  
Soohee Park ◽  
Hyun-gyoo Roh ◽  
Seungtaek Oh ◽  
Sunghoon Kim ◽  
...  

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