Impact of pulping routes of rice straw on cellulose nanoarchitectonics and their behavior toward Indigo dye

Abstract

This work deals with emphasizing the relation between particle dimension distribution of nanocellulose (PDD) particles with its efficiency as stabilizing/adsorbent agent of Indigo dye. In this respect, different pulping reagents were used in preparation of Rice straw pulps as precursors for nanocelluloses using acid hydrolysis and oxidizing agents [(KMnO4 and NH4)2S2O8] methods. The PDD was estimated by indirect method through processing the TEM images using the software ImageJ. The resulting nanocelluloses were also characterized by X-ray diffraction (XRD) and Fourier-transform infrared spectra (FTIR) together with sulfate ester and carboxyl contents. The data showed the effective role of pulping reagent on PDD. The cellulose nanocrystals (CNCs) from NaOH-AQ pulp, with the longest crystal length (204.4 ± 107.8 nm) and the lowest diameter (6.7 ± 2.3 nm), exhibited most stabilized suspension of dye; however, the highest adsorption capacity was accompanied the oxidized nanocellulose (Ox-NC) from neutral RS pulp with lowest PDD (4.98 ± 1.6 and 90.5 ± 3.14), together with highest COO content (476.46 μmol/g).

Value Chain Analysis of Rice Industry by Products in a Circular Economy Context: A Review

“…According to literature, rice straw may be used efficiently for composite preparation [105][106][107][108][109][110][111]. Furthermore, rice straw microfibrils at 5% increase the characteristics of rice straw polypropylene composites [107].…”

Enhancing cellulose fiber properties from chromolaena odorata and anana comosus through novel pulping chemical mixtures

“…Still, lower yields of 61.18 % and 62.40 % were recorded for the same plant material when sodium hydroxide and ethanol were used as the pulping chemicals (Figure 1b). The addition of anthraquinone to sodium hydroxide during pulping has been documented to have increased the yield, improved the chemo-mechanical properties of the products, quickened delignification, prevented redeposition of removed noncellulosic materials and prevented carbohydrate peeling effect [2,7,8]. This study has demonstrated that combining ethanol and anthraquinone can improve pulp yield.…”

“…Material thermal firmness was observed using a thermogravimetric analyzer. Using the absorbance peak height of the FTIR spectra, HBI, LOI, and TCI were calculated using equations ( 6), (7), and (8), respectively.…”

“…To enhance the properties of cellulose, sodium hydroxide pulping has been modified by adding some other chemicals. The addition of anthraquinone to sodium hydroxide has been reported [2,6,7]. Adding ethanol to soda pulping has been reported to increase the lignin removal and yield and produced a better result than using kraft pulping chemicals in ethanol production [8].…”

Design of New Process to Utilize Stubble Char for Constraction of M25 Concrete

“…However, several challenges can hinder its effective utilization like high silica content, which can make it less palatable and digestible for livestock. Basta et al [9] studied the effects of rice straw pulping processes on cellulose nanoarchitecture and how they react to indigo dye. Low energy content which limits its use as a feedstock for bioenergy production and Slow decomposition.…”