Dissolution and recovery of cellulose from pine wood bits in ionic liquids and a co-solvent component mixed system

The dissolution and recovery of cellulose from pine wood bits with two types of ionic liquids and co-solvents were explored. The results revealed that 1-ethyl-3-methylimidazolium diethylphosphonate ionic liquid/dimethylsulfoxide (mass ratio 1:0.5) could dissolve pine cellulose within 8 min at 105°C. Moreover, the degree of polymerization of the regenerated cellulose reached 244. The dissolved cellulose could be regenerated from the component solution when water was added. Then, the regenerated cellulose was characterized by X-ray powder diffraction, Fourier-transform infrared spectroscopy, and thermal gravimetric analysis measurements. The results revealed that there was no derivatization of the reaction in the process of dissolution and that dissolving the pine cellulose was a direct process. The crystalline structure of the cellulose was converted from cellulose I to cellulose II after regeneration. The regenerated cellulose was also found to have good thermal stability.

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Spectroscopic evaluation of chiral and achiral fluorescent ionic liquids

Open Chemistry ◽

10.2478/s11532-010-0062-7 ◽

2010 ◽

Vol 8 (4) ◽

pp. 946-952 ◽

Cited By ~ 10

Author(s):

Hadi Marwani

Keyword(s):

Ionic Liquids ◽

Room Temperature ◽

High Yield ◽

Gravimetric Analysis ◽

Chlorpromazine Hydrochloride ◽

Good Thermal Stability ◽

Chemical Structures ◽

Phenanthroline Monohydrate ◽

Yield And Purity ◽

Good Agreement

AbstractIn this study, spectroscopic investigation of chiral and achiral room temperature ionic liquids is achieved. New ionic liquids were prepared via metathesis, accomplished by the reaction of either L-phenylalanine ethyl ester hydrochloride, chlorpromazine hydrochloride or 1,10-Phenanthroline monohydrate hydrochloride with lithium bis(trifluoromethane) sulfonamide in water. The resulting ionic liquids were produced in high yield and purity. The results obtained by use of 1H NMR and IR experiments were in very good agreement with the chemical structures of the synthesized ionic liquids. In addition, the results of thermal gravimetric analysis suggested that these ionic liquids have good thermal stability. UV-Vis and fluorescence spectroscopy measurements indicated that these ionic liquids are strongly optically absorbent and fluorescent. Lastly, time-based fluorescence steady-state measurements demonstrated the high photostability of these ionic liquids.

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Structure of Regenerated Celluloses Treated with Ionic Liquids and Comparison of their Enzymatic Digestibility by Purified Cellulase Components

Australian Journal of Chemistry ◽

10.1071/ch12342 ◽

2012 ◽

Vol 65 (11) ◽

pp. 1491 ◽

Cited By ~ 5

Author(s):

Masahiro Mizuno ◽

Shuji Kachi ◽

Eiji Togawa ◽

Noriko Hayashi ◽

Kouichi Nozaki ◽

...

Keyword(s):

Ionic Liquids ◽

Crystal Form ◽

Regenerated Cellulose ◽

Cellulose Ii ◽

Cellulose I ◽

Acid Moiety ◽

Amino Acid Moiety ◽

Hydrolysis Of Cellulose ◽

Hydrolysis Of ◽

Disordered Chain

In this study, regenerated celluloses were prepared from microcrystalline cellulose (MCC) by treatment with three ionic liquids (ILs) having 1-ethyl-3-methylimidazolium (Emim) as the cation, and the IL N-(2-methoxyethyl)-N,N-diethyl-N-methylammonium alanine ([N221ME][Ala]), where the amino acid moiety is the anion. The crystal form of cellulose was transformed from cellulose I to cellulose II by dissolution with an IL and regeneration with anti-solvent. However, the crystallinity of the regenerated cellulose was different; the disordered chain region was increased in the order of [N221ME][Ala] < [Emim][OAc] < [Emim][DEP] < [Emim][Cl]. The monocomponent cellulase, especially endoglucanase, showed high hydrolyzing activity for regenerated cellulose compared with untreated cellulose. Furthermore, the degree of increase of hydrolyzing activity was almost coincident with the order of crystallinity. For the effective hydrolysis of cellulose treated with an IL, it is necessary to prepare the cellulase mixture containing an adequate ratio of each cellulase component according to crystal allomorph and the crystallinity of regenerated cellulose.

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Development of Regenerated Cellulose/Citric Acid Films with Ionic Liquids

Journal of Polymers and the Environment ◽

10.1007/s10924-021-02218-y ◽

2021 ◽

Author(s):

Farhad Soheilmoghaddam ◽

Ghorbanali Sharifzadeh ◽

Hossein Adelnia ◽

Mat Uzir Wahit

Keyword(s):

Ionic Liquids ◽

Citric Acid ◽

Regenerated Cellulose

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Decellularized liver-regenerative 3D printing biomaterials for cell-based liver therapies via a designed procedure combined with papain-containing reagent treatments and supercritical fluids

Bio-Medical Materials and Engineering ◽

10.3233/bme-211303 ◽

2021 ◽

pp. 1-8

Author(s):

Ching-Cheng Huang

Keyword(s):

3D Printing ◽

Thermo Gravimetric Analysis ◽

Extraction Process ◽

Gravimetric Analysis ◽

Collagen Scaffolds ◽

Scanning Calorimetry ◽

Porcine Liver ◽

Good Thermal Stability ◽

Decellularized Liver ◽

Liver Collagen

BACKGROUND: The biologic scaffolds derived from decellularized tissues and organs have been successfully developed in a variety of preclinical and/or clinical studies. OBJECTIVE: The new decellularized liver-regenerative 3D printing biomaterials were designed and prepared for cell-based liver therapies. METHODS: An extraction process was employed to remove the tissue and cellular molecules from porcine liver via pretreatment of supercritical fluid of carbon dioxide (ScCO2). Varying porosities of the decellularized liver tissues were created using papain-containing reagent treatments after ScCO2. RESULTS: The resulting liver-regenerative 3D printing biomaterials of decellularized liver collagen scaffolds were characterized by Fourier transform infrared spectroscopy, thermo-gravimetric analysis, differential scanning calorimetry and scanning electron microscopy. CONCLUSIONS: The decellularized liver collagen scaffolds with good thermal stability (>150 °C) were obtained and employed as liver-regenerative 3D printing biomaterials for cell-based liver therapies.

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Comparative Study on Structural Performance of Several New Regenerated Cellulose Fibers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.573-574.174 ◽

2012 ◽

Vol 573-574 ◽

pp. 174-180

Author(s):

Rong Zhou ◽

Chun Guang Li ◽

Ming Xia Yang

Keyword(s):

Cellulose Fiber ◽

Degree Of Polymerization ◽

Structural Performance ◽

Regenerated Cellulose ◽

Pulp Fiber ◽

Bast Fiber ◽

Bamboo Pulp ◽

Lyocell Fiber ◽

Regenerated Cellulose Fiber ◽

Sectional Shape

Regenerated cellulose fiber is the most widely-used and most variety of cellulose fiber. Five categories and ten kinds of fibers such as lyocell fiber, viscose fiber, modal fiber, bamboo pulp fiber, and sheng-bast fiber were chosen as the research object. The sectional shape, crystallinity and degree of polymerization of fibers were tested and analysis, to explore the nature of the reasons for the formation of fiber performance difference, and to verify through experiments.

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Manganese carbonate-zinc glycerolate, synthesis, characterization and application as catalyst for transesterification of soybean oil

Chemical Industry and Chemical Engineering Quarterly ◽

10.2298/ciceq160227008z ◽

2016 ◽

Vol 22 (4) ◽

pp. 431-443

Author(s):

Xiaochan Zhu ◽

Hui Liu ◽

Dejan Skala

Keyword(s):

Soybean Oil ◽

Solid Phase ◽

Biodiesel Production ◽

Molar Ratio ◽

Mixed System ◽

Solid Catalyst ◽

Manganese Carbonate ◽

Gravimetric Analysis ◽

Working Parameters

In this study, mixed system containing manganese carbonate (MnCO3) and zinc glycerolate (ZnGly) was synthesized, and tested as solid catalyst for transesterification of soybean oil and biodiesel production. The samples of MnCO3/ZnGly before and after usage for transesterification process were characterized using different techniques: determination of basic strength, determination of specific surface area according to Brunauer-Emmett-Teller (BET), measuring the mass change using thermal gravimetric analysis (TGA), investigating the solid phase content and presence of different specific elements and groups by X-Ray diffraction (XRD), the Fourier transform infrared (FT-IR) spectroscopy, the scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). The effects of different working parameters of transesterification were also investigated: temperature (438-458K), duration of transesterification (0-3.5h), methanol to oil molar ratio (12:1-36:1) and used amounts of catalyst (1-5 mass%). The reusability and stability of MnCO3/ZnGly were analyzed and obtained results showed that MnCO3/ZnGly exhibited a good activity with 100% TG conversion and 81.5% FAME yield with fresh catalyst, and can give 95-100% TG conversion and 62-78% FAME yield after 13 repeated use of same amount of catalyst without regeneration processes. Content of Mn and Zn in biodiesel and glycerol was analyzed by ICP-AAS after each reuse of catalyst.

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Properties and applications of cellulose regenerated from cellulose/imidazolium-based ionic liquid/co-solvent solutions: A short review

e-Polymers ◽

10.1515/epoly-2021-0086 ◽

2021 ◽

Vol 21 (1) ◽

pp. 869-880

Author(s):

Ahmad Adlie Shamsuri ◽

Khalina Abdan ◽

Siti Nurul Ain Md. Jamil

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Cellulose Acetate ◽

Processing Time ◽

Short Review ◽

Organic Liquids ◽

Regenerated Cellulose ◽

Solvent Mixtures ◽

Different Types ◽

Novel Applications

Abstract An improvement of ecological conscience currently has increased the consciousness of researchers in reducing the processing time and cost of solvent for the dissolution of cellulose. Latterly, ionic liquids have been employed to process cellulose as they are recyclable and nonvolatile. Besides that, biopolymers such as chitosan, chitin, starch, protein, and cellulose acetate can also be processed by using ionic liquids for diverse applications. In this short review, examples of imidazolium-based ionic liquids that are commonly used for the dissolution of cellulose are implied. Furthermore, examples of organic liquids that are utilized as co-solvents for ionic liquids were revealed. In addition, examples of imidazolium-based ionic liquid/co-solvent mixtures utilized in the dissolution of cellulose and other biopolymers are also demonstrated. The properties and applications of cellulose and its blends regenerated from different types of cellulose/imidazolium-based ionic liquid/co-solvent solutions are also shortly reviewed. The information acquired from this review gives a better understanding of the changes in the properties of regenerated cellulose and regenerated cellulose blends. In addition, this short review serves as a model basis for the creation of novel applications of regenerated cellulose and regenerated cellulose blends by utilizing imidazolium-based ionic liquid/co-solvent mixtures.

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Preparation, Characterization and UV Absorption of Phosphotungstic Acid Cerium

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1061-1062.328 ◽

2014 ◽

Vol 1061-1062 ◽

pp. 328-332

Author(s):

Hai Lian Yu ◽

Zhen Hu

Keyword(s):

Phosphotungstic Acid ◽

Absorption Capacity ◽

Uv Absorption ◽

Precipitation Method ◽

Gravimetric Analysis ◽

X Ray ◽

Good Thermal Stability ◽

Infrared Spectrometer ◽

The Fourier Transform ◽

Fluorescence Spectrometer

Phosphotungstic acid cerium [CePW12O40] was prepared with phosphotungstic acid and hydrate cerium nitrate by precipitation method. The Fourier transform infrared spectrometer, X-ray diffractometer, X-ray fluorescence spectrometer and thermal gravimetric analysis were used to characterize product, The UV-VIS spectrophotometer was used to measure its absorption capacity. The results showed that the prepared product is CePW12O40, it has good crystal and good thermal stability, its purity reaches 99.55%, there is good UV absorption property between 200nm and 260nm..

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