Cellulose nanocrystals from bleached rice straw pulp: acidic deep eutectic solvent versus sulphuric acid hydrolyses

Cellulose ◽  
2021 ◽  
Author(s):  
Wei-Lun Lim ◽  
Ahmad Anas Nagoor Gunny ◽  
Farizul Hafiz Kasim ◽  
Subash C. B. Gopinath ◽  
Nor Helya Iman Kamaludin ◽  
...  
Keyword(s):  
Sulphuric Acid ◽  
Rice Straw ◽  
Cellulose Nanocrystals ◽  
Deep Eutectic Solvent

scholarly journals Generation of highly amenable cellulose-Iβ via selective delignification of rice straw using a reusable cyclic ether-assisted deep eutectic solvent system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chiranjeevi Thulluri ◽  
Ravi Balasubramaniam ◽  
Harshad Ravindra Velankar
Keyword(s):  
Enzymatic Hydrolysis ◽  
Rice Straw ◽  
Deep Eutectic Solvent ◽  
Solvent System ◽  
Cyclic Ether ◽  
Cellulolytic Enzymes ◽  
Ammonium Bromide ◽  
Selective Delignification ◽  
Cellulose Iβ ◽  
Hydrolysis Of

AbstractCellulolytic enzymes can readily access the cellulosic component of lignocellulosic biomass after the removal of lignin during biomass pretreatment. The enzymatic hydrolysis of cellulose is necessary for generating monomeric sugars, which are then fermented into ethanol. In our study, a combination of a deep eutectic (DE) mixture (of 2-aminoethanol and tetra-n-butyl ammonium bromide) and a cyclic ether (tetrahydrofuran) was used for selective delignification of rice straw (RS) under mild conditions (100 °C). Pretreatment with DE-THF solvent system caused ~ 46% delignification whereas cellulose (~ 91%) and hemicellulose (~ 67%) recoveries remained higher. The new solvent system could be reused upto 10 subsequent cycles with the same effectivity. Interestingly, the DE-THF pretreated cellulose showed remarkable enzymatic hydrolysability, despite an increase in its crystallinity to 72.3%. Contrary to conventional pretreatments, we report for the first time that the enzymatic hydrolysis of pretreated cellulose is enhanced by the removal of lignin during DE-THF pretreatment, notwithstanding an increase in its crystallinity. The current study paves way for the development of newer strategies for biomass depolymerization with DES based solvents.

Pandoraea sp. B-6 assists the deep eutectic solvent pretreatment of rice straw via promoting lignin depolymerization

2018 ◽  
Vol 257 ◽  
pp. 62-68 ◽  
Author(s):  
Dan Liu ◽  
Xu Yan ◽  
Shengnan Zhuo ◽  
Mengying Si ◽  
Mingren Liu ◽  
...  
Keyword(s):  
Rice Straw ◽  
Deep Eutectic Solvent ◽  
Lignin Depolymerization

Extraction of cellulose nanocrystals using a recyclable deep eutectic solvent

Cellulose ◽  
2019 ◽  
Vol 27 (3) ◽  
pp. 1301-1314 ◽  
Author(s):  
Huiqiang Wang ◽  
Jiachen Li ◽  
Xianhai Zeng ◽  
Xing Tang ◽  
Yong Sun ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Deep Eutectic Solvent

Structural variations of cotton cellulose nanocrystals from deep eutectic solvent treatment: micro and nano scale

Cellulose ◽  
2018 ◽  
Vol 26 (2) ◽  
pp. 861-876 ◽  
Author(s):  
Zhe Ling ◽  
J. Vincent Edwards ◽  
Zongwei Guo ◽  
Nicolette T. Prevost ◽  
Sunghyun Nam ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Deep Eutectic Solvent ◽  
Cotton Cellulose ◽  
Structural Variations ◽  
Solvent Treatment ◽  
Nano Scale

scholarly journals An alkaline deep eutectic solvent based on potassium carbonate and glycerol as pretreatment for the isolation of cellulose nanocrystals from empty fruit bunch

BioResources ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. 1154-1170
Author(s):  
Pei Gie Gan ◽  
Sung Ting Sam ◽  
Muhammad Faiq Abdullah ◽  
Mohd Firdaus Omar ◽  
Lian See Tan
Keyword(s):  
Acid Hydrolysis ◽  
Potassium Carbonate ◽  
Cellulose Nanocrystals ◽  
Deep Eutectic Solvent ◽  
Average Diameter ◽  
Processing Parameters ◽  
Molar Ratio ◽  
Composition Analysis ◽  
Empty Fruit Bunch ◽  
Box Behnken Design

Cellulose nanocrystals (CNC) were successfully isolated from oil palm empty fruit bunch (EFB) using sulphuric acid hydrolysis preceded by alkaline deep eutectic solvent (DES) pretreatment and bleaching. In this study, an alkaline DES consisting of potassium carbonate and glycerol (molar ratio of 1:7) was used as the pretreatment solvent to promote the dissolution of lignin and hemicellulose. The processing parameters of acid hydrolysis were optimized using Box-Behnken Design. The results showed that the yield of CNC was 37.1%, under the optimal conditions of 60.0 wt% acid concentration at 46.1 °C for 58.5 min. The field emission scanning electron microscopy (FESEM), chemical composition analysis, and Fourier transform infrared (FTIR) results indicated that unwanted impurities, such as hemicellulose and lignin, were efficiently eliminated from the raw EFB fibers by DES pretreatment and bleaching. The average diameter of CNC was less than 10 nm. The raw EFB fiber, treated cellulose, and CNC showed crystallinities of 38.7%, 51.2%, and 65.3%, respectively. The CNC had lower thermal stability, which was ascribed to the sulphate group present on the CNC surface.

Physicochemical transformation of rice straw after pretreatment with a deep eutectic solvent of choline chloride/urea

2017 ◽  
Vol 176 ◽  
pp. 307-314 ◽  
Author(s):  
Mingzhu Pan ◽  
Guomin Zhao ◽  
Chunxiang Ding ◽  
Bing Wu ◽  
Zhina Lian ◽  
...  
Keyword(s):  
Rice Straw ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Physicochemical Transformation

Green method for preparation of cellulose nanocrystals using deep eutectic solvent

Cellulose ◽  
2020 ◽  
Vol 27 (8) ◽  
pp. 4305-4317 ◽  
Author(s):  
Michael A. Smirnov ◽  
Maria P. Sokolova ◽  
Dmitry A. Tolmachev ◽  
Vitaly K. Vorobiov ◽  
Igor A. Kasatkin ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Deep Eutectic Solvent ◽  
Green Method

Preparation and thermostability of cellulose nanocrystals and nanofibrils from two sources of biomass: rice straw and poplar wood

Cellulose ◽  
2019 ◽  
Vol 26 (16) ◽  
pp. 8625-8643 ◽  
Author(s):  
Guomin Zhao ◽  
Jun Du ◽  
Weimin Chen ◽  
Mingzhu Pan ◽  
Dengyu Chen
Keyword(s):  
Rice Straw ◽  
Cellulose Nanocrystals ◽  
Poplar Wood
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