scholarly journals Study on the Preparation of Nanocellulose Powder and Its Formation Mechanism

2021 ◽  
Author(s):  
Zirui zhu ◽  
Wenbo Wang ◽  
Xiaohui Wang ◽  
Xin Zhao ◽  
Nannan Xia ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Aqueous Suspension ◽  
Drying Methods ◽  
Salting Out ◽  
Colloidal Properties ◽  
Industrial Preparation ◽  
Volatile Organic ◽  
Potential Applications ◽  
Powder Formation ◽  
Colloidal State

Abstract Nanocellulose is a kind of cellulose based nano material with fantastic properties and numerous potential applications. However, due to the fact that nanocellulose exhibits colloidal properties when its concentration is high, the drying of nanocellulose has always been an urgent problem to be solved. To address this problem, the precipitation and drying mechanism of cellulose nanocrystal (CNC), one of the most common types of nanocellulose, was studied in this paper. The CNC was precipitated from the aqueous suspension by salting out to avoid the CNC colloidal state when concentrated in water. The obtained CNC precipitation with a small amount of water and the actively added electrolyte was dehydrated and purified by solvent displacement with volatile organic. Then CNC powder can be taken shape by drying the mixture of CNC and organic solvent with different drying methods. The mechanism of CNC precipitation from aqueous suspension and CNC powder formation from volatile organic solvent was studied. After comprehensive consideration, a method for preparing re-dispersible CNC powder was established, and the properties of this powder were studied, that provided a solution for the industrial preparation and application of nanocellulose.

Facile fractionation of bamboo hydrolysate and characterization of isolated lignin and lignin-carbohydrate complexes

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaodi Wang ◽  
Yongchao Zhang ◽  
Luyao Wang ◽  
Xiaoju Wang ◽  
Qingxi Hou ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Organic Solvent ◽  
Extraction Process ◽  
Water Soluble ◽  
Organic Solvent Extraction ◽  
Glycoside Linkage ◽  
Potential Applications ◽  
Tremendous Amount ◽  
Main Components ◽  
Hemicellulosic Sugars

AbstractAn efficient separation technology for hydrolysates towards a full valorization of bamboo is still a tough challenge, especially regarding the lignin and lignin-carbohydrate complexes (LCCs). The present study aimed to develop a facile approach using organic solvent extraction for efficiently fractionating the main components of bamboo hydrolysates. The high-purity lignin with only a trace of carbohydrates was first obtained by precipitation of the bamboo hydrolysate. The water-soluble lignin (WSL) fraction was extracted in organic solvent through a three-stage organic solvent extraction process, and the hemicellulosic sugars with increased purity were also collected. Furthermore, a thorough characterization including various NMR techniques (31P, 13C, and 2D-HSQC), GPC, and GC-MS was conducted to the obtained lignin-rich-fractions. It was found that the WSL fraction contained abundant functional groups and tremendous amount of LCC structures. As compared to native LCC of bamboo, the WSL fraction exhibited more typical LCC linkages, i.e. phenyl glycoside linkage, which is the main type of chemical linkage between lignin and carbohydrate in both LCC samples. The results demonstrate that organic phase extraction is a highly efficient protocol for the fractionation of hydrolysate and the isolation of LCC-rich streams possessing great potential applications.

Extraction and purification of IgG by hydrophilic organic solvent salting-out extraction

2016 ◽  
Vol 1012-1013 ◽  
pp. 137-143 ◽  
Author(s):  
Yuesheng Dong ◽  
Bofeng Pang ◽  
Fang Yu ◽  
LingLing Li ◽  
Wencai Liu ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Salting Out ◽  
Extraction And Purification

scholarly journals Potential applications of graphene-based nanomaterials as adsorbent for removal of volatile organic compounds

2020 ◽  
Vol 135 ◽  
pp. 105356 ◽  
Author(s):  
Vanish Kumar ◽  
Yoon-Seo Lee ◽  
Jae-Won Shin ◽  
Ki-Hyun Kim ◽  
Deepak Kukkar ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Volatile Organic ◽  
Potential Applications

E132 Vaporizer for Low Volatile Organic Solvent for Semiconductor Reactors

2009 ◽  
Vol 2009 (0) ◽  
pp. 135-136
Author(s):  
Noritsugu Miyata ◽  
Kazushige Kikuta ◽  
Yutaka Tabe ◽  
Takemi Chikahisa
Keyword(s):  
Organic Solvent ◽  
Volatile Organic

An aqueous suspension system for phospholipase D-mediated synthesis of PS without toxic organic solvent

2003 ◽  
Vol 80 (7) ◽  
pp. 653 ◽  
Author(s):  
Yugo Iwasaki ◽  
Yukiko Mizumoto ◽  
Takahiro Okada ◽  
Takaya Yamamoto ◽  
Kentaro Tsutsumi ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Phospholipase D ◽  
Aqueous Suspension ◽  
Suspension System

Luminescent MOF material based on cadmium(ii) and mixed ligands: application for sensing volatile organic solvent molecules

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 18087-18091 ◽  
Author(s):  
Dongmei Wang ◽  
Lirong Zhang ◽  
Guanghua Li ◽  
Qisheng Huo ◽  
Yunling Liu
Keyword(s):  
Organic Solvent ◽  
Luminescent Probe ◽  
Mixed Ligands ◽  
Volatile Organic ◽  
Solvent Molecules

A luminescent MOF was constructed by employing a mixed ligands strategy and may be used as a potential luminescent probe for the detection of acetone.

A Review for the Synthesis of Silk Fibroin Nanoparticles with Different Techniques and Their Ability to be Used for Drug Delivery

2019 ◽  
Vol 15 (4) ◽  
pp. 339-348 ◽  
Author(s):  
Olga Gianak ◽  
George Z. Kyzas ◽  
Victoria F. Samanidou ◽  
Eleni A. Deliyanni
Keyword(s):  
Electron Microscopy ◽  
Drug Delivery ◽  
Particle Size ◽  
Organic Solvent ◽  
Silk Fibroin ◽  
Release Rate ◽  
Synthesis Method ◽  
High Yield ◽  
Salting Out ◽  
Silk Fibroin Nanoparticles

Background: Silk fibroin is the main protein of silk, and it has recently been evaluated for drug delivery applications due to its excellent properties. Specifically, silk fibroin exhibits good biocompatibility, biodegradability and low immunogenicity. Fibroin nanoparticles have attracted attention due to their high binding ability to different drugs as well as their ability for controlled drug release. The improvement of the therapeutic efficiency of drug encapsulation is important and depends on the particle size, the chemical structure and the properties of the silk fibroin nanoparticles. Methods: There is a variety of methods for the preparation of fibroin nanoparticles such as (i) electrospraying and desolvation method, (ii) supercritical fluid technologies, (iii) capillary-microdot technique, (iv) salting out etc. Furthermore, various techniques have been used for the characterization of nanoparticles such as SEM (scanning electron microscopy), TEM (transmission electron microscopy), DLS (dynamic light scattering), Zeta-potential and FTIR (Fourier transform infrared spectroscopy). Different drugs (paclitaxel, curcumin, 5-fluorouracil etc) have been encapsulated in fibroin nanoparticles. Results: Each separated synthesis method has different advantages such as (i) high yield, (ii) avoid use of toxic solvents, (iii) low cost, (iv) controllable particle size, (v) no organic solvent residue, (vi) simplicity of operation, (vii) small particles size, (viii) homeliness of operation, (ix) restrainable particle size, (x) easy and safe to operate, (xi) no use of organic solvent. Moreover, some major drugs studied are Floxuridine, Fluorouracil, Curcumin, Doxorubicin, Metotrexate, Paclitaxel and Doxorubicin, Horseradish peroxidase. All the above combinations (preparation method-drug) are studied in detail. Conclusion: Various drugs have been encapsulated successfully in silk fibroin and all of them exhibit a significant release rate. Finally, the encapsulation efficiency and release rate depend on the molecular weight of the drugs and it can be adjusted by controlling the crystallinity and concentration of silk fibroin.

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