scholarly journals Enhancing packaging board properties using micro- and nanofibers prepared from recycled board

Cellulose ◽  
2020 ◽  
Vol 27 (12) ◽  
pp. 7215-7225
Author(s):  
Ossi Laitinen ◽  
Terhi Suopajärvi ◽  
Henrikki Liimatainen
Keyword(s):  
Choline Chloride ◽  
Cellulose Nanofibers ◽  
Deep Eutectic Solvent ◽  
Strength Properties ◽  
Chemical Pretreatment ◽  
Mechanical Grinding ◽  
Cellulose Microfibers ◽  
Board Strength ◽  
Grinding Time

Abstract In this study, cellulose microfibers and cellulose nanofibers (CNF) prepared from recycled boxboard pulp using a mechanical fine friction grinder were used as reinforcements in a board sheet. Micro- and nanofibers manufactured by mechanical grinding have typically broad particle size distribution, and they can contain both micro- and nano-sized fibrils. Deep eutectic solvent of choline chloride and urea was used as a non-hydrolytic pretreatment medium for the CNF, and reference CNF were used without any chemical pretreatment. The CNF were ground using three grinding levels (grinding time) and their dosage in the board varied from 2 to 6 wt%. The results indicate that the board properties could be tailored to obtain a balance between the processability and quality of the products by adjusting the amount of CNF that was added (2–6 wt%). A preliminary cost assessment indicated that the most economical way to enhance the board strength properties was to add around 4% of CNF with a moderate grinding level (i.e., grinding energy of 3–4 kWh/kg). Overall, the strength properties of the manufactured board sheets improved by several dozen percentages when CNF was used as the reinforcement.

Mechanical Grinding Improved Quality of Potassium-Feldspar Rocks

2013 ◽  
Vol 826 ◽  
pp. 79-84
Author(s):  
Le Fu Lv ◽  
Guo Sheng Gai ◽  
Chun Sheng Liu ◽  
Yu Fen Yang ◽  
Zhen Quan He ◽  
...  
Keyword(s):  
Ball Mill ◽  
Crop Production ◽  
Potassium Feldspar ◽  
Mechanical Grinding ◽  
Surface Areas ◽  
Diffraction Peaks ◽  
Effect On Yield ◽  
Kinetics Of ◽  
Grinding Time

Potassium-feldspar rocks were ground for 10, 40, 120 and 180 minutes respectively using a porcelain ball mill. The kinetics of potassium release from activated rocks and their effect on yield and nutrient uptake by grain amaranth were evaluated. Results showed that high intensive grinding could improve physicochemical properties and bioavailability of potassium-feldspar rocks. With increasing grinding time, the particle diameters were decreased, the specific surface areas were increased, and the diffraction peaks were decreased remarkably. Maximum release of acid-soluble K was obtained in all rocks during the initial stages of leaching (0-10days), but their differences narrowed down at latter stages (10-60days). The cumulative release of K from the rock treated for 180 minutes was the highest amount (5331.51 K mg/kg rocks) and was 3.75, 1.29 and 19.8% higher than the rocks treated for 10, 40 and 120 minutes, respectively. Data from pot experiment revealed that activated rocks with higher bioavailability promoted the growth and K accumulation of gain amaranth. This study indicated that mechanical activation could be an alternate technology for the efficient of using potassium-feldspar rocks for crop production.

scholarly journals High-strength cellulose nanofibers produced via swelling pretreatment based on a choline chloride–imidazole deep eutectic solvent

2020 ◽  
Vol 22 (5) ◽  
pp. 1763-1775 ◽  
Author(s):  
Juho Antti Sirviö ◽  
Kalle Hyypiö ◽  
Shirin Asaadi ◽  
Karoliina Junka ◽  
Henrikki Liimatainen
Keyword(s):  
Choline Chloride ◽  
Cellulose Nanofibers ◽  
Deep Eutectic Solvent ◽  
High Strength ◽  
Cellulose Fibers ◽  
Mechanical Disintegration

A deep eutectic solvent based on choline chloride and imidazole was investigated for swelling of cellulose fibers prior to mechanical disintegration into cellulose nanofibers.

Malaysian Foxtail Grass - A Potential Source of Natural/Agro Fibre for Polymer Composite Panel

2013 ◽  
Vol 740 ◽  
pp. 507-510
Author(s):  
C.M. Ruzaidi ◽  
A.M. Mustafa Al Bakri ◽  
H. Kamarudin ◽  
M.N. Norazian ◽  
A.R. Rafiza ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Strength Properties ◽  
Composite Panel ◽  
Flexural Test ◽  
Mechanical Grinding ◽  
Fibre Size ◽  
Potential Source ◽  
Potential Sources ◽  
Composites Panel ◽  
Grinding Time

Foxtail grass, also known as rumput bulu by the local people, is one of the fast growing grasses abundantly available all over Malaysia. A full grown Foxtail grass attains a height of about 0.5 1.5 meters. The fibres were prepared by mechanical grinding procedure and the fibre size and length produced can be controlled through the grinding time of this grass material. The weight loss of the different grinding time was calculated. The polymer composites panel were then made from the mixing the polystyrene with various size of fibre produced. Flexural test exhibited good and comparable strength properties. The results show that this grass fibre may be considered as one of the potential sources of natural/ agro fibres for polymer composites panel.

scholarly journals Strengthening Cellulose Nanopaper via Deep Eutectic Solvent and Ultrasound-Induced Surface Disordering of Nanofibers

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 78
Author(s):  
Elizaveta V. Batishcheva ◽  
Darya N. Sokolova ◽  
Veronika S. Fedotova ◽  
Maria P. Sokolova ◽  
Alexandra L. Nikolaeva ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ethylene Glycol ◽  
Bacterial Cellulose ◽  
Choline Chloride ◽  
Cellulose Nanofibers ◽  
Deep Eutectic Solvent ◽  
Thermal Characteristics ◽  
Degree Of Polymerization ◽  
Hydrogen Bond Acceptor ◽  
Structural Investigations

The route for the preparation of cellulose nanofiber dispersions from bacterial cellulose using ethylene glycol- or glycerol-based deep eutectic solvents (DES) is demonstrated. Choline chloride was used as a hydrogen bond acceptor and the effect of the combined influence of DES treatment and ultrasound on the thermal and mechanical properties of bacterial cellulose nanofibers (BC-NFs) is demonstrated. It was found that the maximal Young’s modulus (9.2 GPa) is achieved for samples prepared using a combination of ethylene glycol-based DES and ultrasound treatment. Samples prepared with glycerol-based DES combined with ultrasound exhibit the maximal strength (132 MPa). Results on the mechanical properties are discussed based on the structural investigations that were performed using FTIR, Raman, WAXD, SEM and AFM measurements, as well as the determination of the degree of polymerization and the density of BC-NF packing during drying with the formation of paper. We propose that the disordering of the BC-NF surface structure along with the preservation of high crystallinity bulk are the key factors leading to the improved mechanical and thermal characteristics of prepared BC-NF-based papers.

Silver nanoparticles synthesized by laser ablation confined in urea choline chloride deep-eutectic solvent

2016 ◽  
Vol 12 ◽  
pp. 1-4 ◽  
Author(s):  
David O. Oseguera-Galindo ◽  
Roberto Machorro-Mejia ◽  
Nina Bogdanchikova ◽  
Josue D. Mota-Morales
Keyword(s):  
Silver Nanoparticles ◽  
Laser Ablation ◽  
Choline Chloride ◽  
Deep Eutectic Solvent

A Utilization of Choline Chloride-Based Deep Eutectic Solvent Integrated with Alkaline Earth Metal Hexahydrate in the Pretreatment of Oil Palm Fronds

2021 ◽  
Vol 60 (5) ◽  
pp. 2011-2026
Author(s):  
Eng Kein New ◽  
Ta Yeong Wu ◽  
Khai Shing Voon ◽  
Alessandra Procentese ◽  
Katrina Pui Yee Shak ◽  
...  
Keyword(s):  
Oil Palm ◽  
Alkaline Earth ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Oil Palm Fronds ◽  
Palm Fronds

scholarly journals Comparison of Corn Stover Pretreatments with Lewis Acid Catalyzed Choline Chloride, Glycerol and Choline Chloride-Glycerol Deep Eutectic Solvent

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1170
Author(s):  
Yuan Zhu ◽  
Benkun Qi ◽  
Xinquan Liang ◽  
Jianquan Luo ◽  
Yinhua Wan
Keyword(s):  
Corn Stover ◽  
Lewis Acid ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Enzymatic Saccharification ◽  
Glycerol Solution ◽  
Cellulose Conversion ◽  
Biomass Processing ◽  
Acid Catalyzed ◽  
Highly Correlated

Herein, corn stover (CS) was pretreated by less corrosive lewis acid FeCl3 acidified solutions of neat and aqueous deep eutectic solvent (DES), aqueous ChCl and glycerol at 120 °C for 4 h with single FeCl3 pretreatment as control. It was unexpected that acidified solutions of both ChCl and glycerol were found to be more efficient at removing lignin and xylan, leading to higher enzymatic digestibility of pretreated CS than acidified DES. Comparatively, acidified ChCl solution exhibited better pretreatment performance than acidified glycerol solution. In addition, 20 wt% water in DES dramatically reduced the capability of DES for delignification and xylan removal and subsequent enzymatic cellulose saccharification of pretreated CS. Correlation analysis showed that enzymatic saccharification of pretreated CS was highly correlated to delignification and cellulose crystallinity, but lowly correlated to xylan removal. Recyclability experiments of different acidified pretreatment solutions showed progressive decrease in the pretreatment performance with increasing recycling runs. After four cycles, the smallest decrease in enzymatic cellulose conversion (22.07%) was observed from acidified neat DES pretreatment, while the largest decrease (43.80%) was from acidified ChCl pretreatment. Those findings would provide useful information for biomass processing with ChCl, glycerol and ChCl-glycerol DES.

scholarly journals Esterification of Lignin Isolated by Deep Eutectic Solvent Using Fatty Acid Chloride, and Its Composite Film with Poly(lactic acid)

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2149
Author(s):  
Chan-Woo Park ◽  
Song-Yi Han ◽  
Rajkumar Bandi ◽  
Ramakrishna Dadigala ◽  
Eun-Ah Lee ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Fatty Acid ◽  
Composite Film ◽  
Acid Chloride ◽  
Pinus Densiflora ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Morphological Characteristics ◽  
Poly Lactic Acid ◽  
Fatty Acid Chloride

In this study, the effect of lignin esterification with fatty acid chloride on the properties of lignin and lignin/poly(lactic acid) (PLA) composites was investigated. Lignocellulose (Pinus densiflora S. et Z.) was treated using a deep eutectic solvent (DES) with choline chloride (ChCl)/lactic acid (LA). From the DES-soluble fraction, DES-lignin (DL) was isolated by a regeneration process. Lignin esterification was conducted with palmitoyl chloride (PC). As the PC loading increased for DL esterification, the Mw of esterified DL (EDL) was increased, and the glass transition temperature (Tg) was decreased. In DL or EDL/PLA composite films, it was observed that EDL/PLA had cleaner and smoother morphological characteristics than DL/PLA. The addition of DL or EDL in a PLA matrix resulted in a deterioration of tensile properties as compared with neat PLA. The EDL/PLA composite film had a higher tensile strength and elastic modulus than the DL/PLA composite film. DL esterification decreased water absorption with lower water diffusion coefficients. The effect of lignin esterification on improving the compatibility of lignin and PLA was demonstrated. These results are expected to contribute to the development of high-strength lignin composites.

Toxico-metabolomics study of a deep eutectic solvent comprising choline chloride and urea suggests in vivo toxicity involving oxidative stress and ammonia stress

2021 ◽  
Vol 23 (3) ◽  
pp. 1300-1311 ◽  
Author(s):  
Dasom Jung ◽  
Jae Back Jung ◽  
Seulgi Kang ◽  
Ke Li ◽  
Inseon Hwang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
In Vivo Toxicity ◽  
Metabolomics Study ◽  
Ammonia Stress

The in vitro and in vivo studies suggest that choline chloride-based deep eutectic solvents may not be considered as pure, safe mixtures even if they consist of safe compounds.

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