Phosphoric Acid-Mediated Depolymerization and Decrystallization of α-Cellulose Obtained from Corn Cob: Preparation of Low Crystallinity Cellulose and Some Physicochemical Properties

Ohwoavworhua, F O; Adelakun, Tiwalade A.

doi:10.4314/tjpr.v4i2.14627

Cited by 17 publications

(18 citation statements)

References 7 publications

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“…The materials used in the research are palm oil midrib, passion fruit, NaOH pellet, NaOCl ( (Ohwoavworhua, 2005).…”

Section: Methodsmentioning

confidence: 99%

Synthesis of CMC from Palm Midrib Cellulose as Stabilizer and Thickening Agent in Food

Sebayang¹,

Sembiring²

2017

Orient. J. Chem

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The using of carboxymethyl cellulose (CMC) from palm midrib as stabilizer on ice-cream making is done in three steps. First step is isolation process of á-cellulose from palm midrib powder, FTIR analysis shows that the compound is a cellulose molecule. The second step is alkalization with isopropanol as the solvent, carboxymethylation with monochloroacetic acid, and neutralization with CH 3 COOH 90% then ethanol, methanol and aquadest are used for purification followed with centrifugation process and adding in acetone which gives carboxymethyl cellulose a positive result in qualitative analysis. FTIR peak obtained is similar to that of commercial CMC, with the degree of substitution 0.82 and viscosity 0.076 ml/g. The last step is ice cream making process. In this step, CMC is added into the ice-cream batter with variated concentration of CMC starting from 0 to 0.5%. Ice-cream produced is then given melting time test and the overrun value is determined. Based on the research, 0.5% addition of CMC shows the most optimum melting time which is 31.02 minutes and overrun value of 42.34%. Organoleptic test given to 15 respondents also show that ice-cream with addition of 0.5% CMC gives the best result for the soft texture, sweet taste, fragrance aroma and light brown colour. CMC for thickening agent in syrup is measured with Ostwald viscometer. It shows that syrup is thicker with the addition of CMC. The highest vitamin-C content in passion fruit syrup is in addition of 0.3% which is 330.20.

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“…The materials used in the research are palm oil midrib, passion fruit, NaOH pellet, NaOCl ( (Ohwoavworhua, 2005).…”

Section: Methodsmentioning

confidence: 99%

Synthesis of CMC from Palm Midrib Cellulose as Stabilizer and Thickening Agent in Food

Sebayang¹,

Sembiring²

2017

Orient. J. Chem

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“…This mixture was then filtered, washed with distilled water until pH was neutral, the bleaching process was repeated with 10% H2O2 for 15 min at 60 °C. Finally, it was dried in an oven at 60 °C and was kept in vacuum desiccators (Ohwoavworhua and Adelakun, 2005). Do not add any text to the headers (do not set running heads) and footers, not even page numbers, because text will be added electronically.…”

Section: Isolation Of α-Cellulose From Oil Palm Empty Fruit Bunches (mentioning

confidence: 99%

Improvisation of Mechanical Properties on Natural Rubber Latex Nanocomposites with Additioning of Cellulose Nanocrystals (CNCs) Percolated by Carbon Nanotubes (CNTs) in Various Concentrations

Siregar¹,

Gea²,

Barus³

et al. 2019

Proceedings of the Proceedings of the 5th Annual International Seminar on Trends in Science and Science Education, AISTSSE 2018

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The study on enhancing mechanical properties of natural rubber-based nanocomposites which was reinforced with nanofiller has been observed for many years. In this research, cellulose nanocrystals (CNCs), which was prepared by hydrolyzing cellulose from oil palm empty fruit bunches (OPEFB), were percolated with carbon nanotubes (CNTs) using ultrasonicator to obtain CNCs@CNTs nanohybrid and utilized as the filler. Natural rubber latex/CNCs@CNTs nanocomposites were fabricated via latex mild mixing and coagulated by sulphuric acid followed by hydraulic hot-press. The mechanical properties of natural rubber latex/CNCs@CNTs nanocomposites were characterized using the tensile testing machine to evaluate the efficiency of the filler reinforcing the nanocomposites. On the other hand, the morphology of nanocomposite was observed by Scanning Electron Microscope (SEM) and its swelling index (SI) was calculated using ASTM D3616. Tensile test showed a significant increase in tensile strength of nanocomposites with the optimum number of 0.428 MPa and was achieved by nanocomposite consisting 3 phr of filler. Moreover, the least number of SI was also belonged to 3 phr filler of nanocomposites, which is 8.5. Finally, the morphology of nanocomposites exhibited the filler taking a prominent role in improving the mechanical properties.

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“…Tahap pertama dari isolasi α-selulosa dari TKS adalah proses delignifikasi dengan menggunakan HNO 3 3,5% dan NaNO 2 untuk menghilangkan lignin dari TKS dalam bentuk nitrolignin yang larut dalam air (Ohwoavworhua, 2005). Selanjutnya proses swelling dengan menggunakan NaOH 2% dan Na 2 SO 3 2%, pada proses ini terjadi pengembangan serat sehingga hemiselulosa, garam-garam mineral, dan abu hilang, dan menghasilkan pulp berwarna kuning kecoklatan (Sheltami, 2012).…”

Section: Hasil Dan Pembahasanunclassified

Isolasi dan Karakterisasi Nanokistral Selulosa dari Tandan Sawit (Elaeis Guineensis Jack)

Putri¹,

Gea

2018

EKW

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This research on cellulosic nanocrystalline analysis by Laboratory research. This research was conducted to obtain the characterization information of isolated cellulose nanocrystals from empty palm bunches. The initial stage is α-cellulose isolation from empty palm bunches (TKS) through dilignification process using HNO 3 3,5% and NaNO 2 , then pulping process with 17% NaOH, and bleaching with H2O2 10%. The next step is isolation of cellulose nanocrystals from α-cellulose done with acid hydrolysis, that is by using sulfuric acid 48,84%, which then diialial until obtained nanokristal cellulose. The resulting cellulose Nanocrystals were characterized by their functional groups using FT-IR, and then morphological and size analyzes using TEM. The resulting nanocrystal size is 47.46 nm Abstrak: Nanokristal selulosa (NKS) merupakan nanopartikel kristalin yang dapat diisolasi dari selulosa, dan digunakan sebagai bahan penguat pada bionanomaterial. Tujuan penambahan material dengan ukuran nano (NKS) adalah untuk menghasilkan bionanomaterial dengan sifat-sifat mekank yang lebih baik. Isolasi NKS dalam penelitian ini dilakukan secara laboratorium. Jenis penelitian ini menggunakan true experimental. Penelitian ini dilakukan untuk mendapatkan informasi karakterisasi NKS hasil isolasi dari tandan kosong sawit (TKS). Proses isolasi NKS dilakukan dengan mengisolasi α-selulosa dari TKS melalui proses dilignifikasi dengan menggunakan HNO 3 3,5% dan NaNO 2 , kemudian peoses pulping dengan NaOH 17%, dan pemutihan dengan H 2 O 2 10%. Tahap selanjutnya yaitu isolasi NKS dari α-selulosa dilakukan dengan hidrolisis asam, yaitu dengan menggunakan asam sulfat 48,84%, yang kemudian didialisis hingga diperoleh nanokristal selulosa. Nanokristal selulosa yang dihasilkan dikarakterisasi gugus fungsinya dengan menggunakan FT-IR, dan kemudian analisis morfologi dan ukuran dengan menggunakan TEM. Ukuran nanokristal yang dihasilkan yaitu 47,46 nm.

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Phosphoric Acid-Mediated Depolymerization and Decrystallization of α-Cellulose Obtained from Corn Cob: Preparation of Low Crystallinity Cellulose and Some Physicochemical Properties

Cited by 17 publications

References 7 publications

Synthesis of CMC from Palm Midrib Cellulose as Stabilizer and Thickening Agent in Food

Synthesis of CMC from Palm Midrib Cellulose as Stabilizer and Thickening Agent in Food

Improvisation of Mechanical Properties on Natural Rubber Latex Nanocomposites with Additioning of Cellulose Nanocrystals (CNCs) Percolated by Carbon Nanotubes (CNTs) in Various Concentrations

Isolasi dan Karakterisasi Nanokistral Selulosa dari Tandan Sawit (Elaeis Guineensis Jack)

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