Impact of Carboxymethylation Pretreatment on Bleached Rice Hull Nanofiber by Grinding

Cao, XiangLin; Lim, Seo-Kyoung; Song, Woo-Yong; Seong, Hyun‐A

doi:10.7584/jktappi.2021.12.53.6.146

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…The smallest particle size was observed in RGR-TO 3 HPH 9. This trend has also been reported in the carboxymethylation of bleached rice hull, where increased DS and grinding resulted in a decreased particle size [54]. A study conducted in Australia on bagasse CNF using ball milling revealed a length of 2000 nm and a diameter of 50 nm [55].…”

Section: Size Of Red Ginseng Residual-treated and Untreated Tempo-oxi...supporting

confidence: 65%

Impact of TEMPO-Oxidation Pretreatment of Red Ginseng Residual on Nanofibrillation

Zahra,

Firsty,

Shin

2024

Processes

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Red ginseng extract is one of the most widely used herbal medicines to prevent and cure various diseases. Among the processed products derived from red ginseng, the water-insoluble part as red ginseng residual (RGR) becomes waste, even though it contains important ingredients. TEMPO-oxidation (TO) can be used as a pre-treatment with different degrees of oxidation (DO) (0 to 0.4) in red ginseng residual (RGR-TO) by introducing chemical oxidation and high-pressure homogenizer (HPH) as a nanofibrillation process. 1H NMR was used to determine the carbohydrate composition and calculate DO, size was examined using a nanoparticle analyzer, and the zeta potential was used to determine surface charge density. RGR-TO with different concentrations had different compositions; glucose and uronic acid were the main ingredients. All treated RGR-TO showed higher oxidant levels than the untreated counterpart (RGR-TO 0). As the oxidant levels increased, the zeta potential and uronic acid increased, but the size of the nanofibril from RGR-TO decreased. The results of this study showed that TEMPO-oxidation pretreatment was effective in producing RGR cellulose nanofibril (CNF) with a variety of properties by adjusting the level of oxidation pretreatment and the number of HPH passes.

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Section: Size Of Red Ginseng Residual-treated and Untreated Tempo-oxi...supporting

confidence: 65%

Impact of TEMPO-Oxidation Pretreatment of Red Ginseng Residual on Nanofibrillation

Zahra,

Firsty,

Shin

2024

Processes

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“…The smallest particle was obtained from LCNF desilicated rice hull with a DS of 0.4, grinding of 9, and HPH of 9. This trend has also been observed with the carboxymethylation of bleached rice hull-an increased DS and grinding resulted in decreased size [14]. On the other hand, bagasse CNF from Australia, which was produced by ball milling, had a length of 2000 nm and a diameter of 50 nm [47].…”

Section: Size Of Lcnf Ds Desilicated Rice Hullmentioning

confidence: 54%

“…Carboxymethylation and TEMPO-oxidation are the most commonly used chemical pretreatment methods [12,13]. After pretreatment, cellulose material was nanofibrillated by the mechanical process using a grinding by supermass-collider or high-pressure homogenization processes [14,15]. The quality of produced cellulose nanofiber could be controlled by particle size analysis, measuring the water retention value by centrifuge, and measuring rheological properties by rheometer [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Lignocellulose Nanofibril from Desilicated Rice Hull with Carboxymethylation Pretreatment

Zahra,

Lim,

Shin

2024

Polysaccharides

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Rice hulls have a high-value potential, and the lignocellulose components are underutilized compared to other biomass resources. Pretreatments such as carboxymethylation of the degree of substitutions (DS) are used to prepare lignocellulose nanofibril (LCNF) from desilicated rice hull (DSRH). High-pressure homogenization (HPH) and grinding are used to process nano fibrillation. The composition of LCNF DS of desilicated rice hull was identified using 1H NMR for polysaccharide composition and DS determination, acetone and hot water extraction to evaluate extractives, and Klason lignin for lignin content. LCNF was prepared using various DS from 0.2 until DS 0.4. The results showed that LCNF DS has a more than −30 mV zeta potential, suitable for stable nanoemulsion formulations. The particle size of LCNF DS decreases with an increasing carboxyl content in the hydrogel and an increasing number of passes through grinding and high-pressure homogenization, of which LCNF DS 0.4 had the smallest width and length. Mechanical processes further reduced the size.

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Impact of Carboxymethylation Pretreatment on the Rheology of Cellulose Nanofiber from Bleached Rice Hull

Zahra¹,

Gao²,

Park³

et al. 2022

J. of Korea TAPPI

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Impact of Carboxymethylation Pretreatment on Bleached Rice Hull Nanofiber by Grinding

Cited by 6 publications

References 34 publications

Impact of TEMPO-Oxidation Pretreatment of Red Ginseng Residual on Nanofibrillation

Impact of TEMPO-Oxidation Pretreatment of Red Ginseng Residual on Nanofibrillation

Characterization of Lignocellulose Nanofibril from Desilicated Rice Hull with Carboxymethylation Pretreatment

Impact of Carboxymethylation Pretreatment on the Rheology of Cellulose Nanofiber from Bleached Rice Hull

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