scholarly journals Ionic liquids assisted processing of renewable resources for the fabrication of biodegradable composite materials

2017 ◽  
Vol 19 (9) ◽  
pp. 2051-2075 ◽  
Author(s):  
Hamayoun Mahmood ◽  
Muhammad Moniruzzaman ◽  
Suzana Yusup ◽  
Tom Welton
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Composite Materials ◽  
Renewable Resources ◽  
Lignocellulosic Materials ◽  
Biodegradable Composites ◽  
Biodegradable Composite ◽  
Recent Developments

A review on recent developments in the ionic liquid assisted processing of biopolymers and lignocellulosic materials for the fabrication of biodegradable composites.

Dehydration of Fructose to 5-Hydroxymethylfurfural Catalyzed by Alkaline Ionic Liquid

2011 ◽  
Vol 287-290 ◽  
pp. 1585-1590 ◽  
Author(s):  
Yong Shui Qu ◽  
Yan Lei Song ◽  
Chong Pin Huang ◽  
Jie Zhang ◽  
Biao Hua Chen
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Renewable Resources ◽  
Room Temperature ◽  
Maximum Yield ◽  
Catalyst System ◽  
Liquid Fuels ◽  
Room Temperature Ionic Liquids ◽  
The Cost

The preparation of 5-hydroxymethylfurfural (5-HMF) through the dehydration of fructose with room temperature ionic liquids (ILs) has received much attention as a way of producing liquid fuels from renewable resources, but the cost of the process is considerably increased with IL as a solvent rather than as a catalyst. In this work, we have shown that the alkaline Ionic Liquid, 1-Butyl-3-methylimidazolium Hydroxide ([BMIM]OH), can be used as a catalyst in the conversion of fructose to 5-HMF. The maximum yield of 5-HMF was 91.6% at 160 °C after 8 h using dimethylsulfoxide (DMSO) as solvent, and the ketose is more easily dehydrated than aldose in this catalyst system.

Recent developments in the field of energetic ionic liquids

2014 ◽  
Vol 2 (22) ◽  
pp. 8153-8173 ◽  
Author(s):  
Elena Sebastiao ◽  
Cyril Cook ◽  
Anguang Hu ◽  
Muralee Murugesu
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Recent Developments ◽  
Energetic Ionic Liquids

Energetic ionic liquids (EILs) are a subset of the rapidly growing field of ionic liquid research.

scholarly journals A Succinct Review on the PVDF/Imidazolium-Based Ionic Liquid Blends and Composites: Preparations, Properties, and Applications

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 761
Author(s):  
Ahmad Adlie Shamsuri ◽  
Rusli Daik ◽  
Siti Nurul Ain Md. Jamil
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Composite Materials ◽  
Physicochemical Properties ◽  
Polymer Blend ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

Poly(vinylidene fluoride) (PVDF) is a versatile thermoplastic fluoropolymer with intriguing characteristics, which is receiving considerable attention from researchers in many areas. Recently, PVDF and its copolymer, such as poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) have been blended with ionic liquids to produce blend and composite materials for target applications. In this succinct review, two types of ionic liquids that are utilized for the preparation of PVDF and PVDF-HFP blends and composites, namely, hydrophilic and hydrophobic imidazolium-based ionic liquids, are reviewed. In addition, the effect of the ionic liquids on the physicochemical properties of the PVDF and PVDF-HFP blends and composites, is described as well. On top of that, a multitude of applications of the blends and composites are also succinctly reviewed. This review may give inspirations to the polymer blend and composite researchers in diversifying the applications of thermoplastic fluoropolymers through the utilization of ionic liquids.

scholarly journals PURIFICATION OF 1-BUTYL-3-METHYLIMIDAZOLIUM CHLORIDE AFTER DISSOLUTION OF WHEAT STRAW

2018 ◽  
Vol 61 (3) ◽  
pp. 83
Author(s):  
Sergei N. Evstaf’ev ◽  
Cuong Q Hoang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Activated Carbon ◽  
Wheat Straw ◽  
Organic Solvents ◽  
Supercritical Co2 ◽  
Liquid Extraction ◽  
Lignocellulosic Materials ◽  
Supercritical Co2 Extraction ◽  
Actual Problem

The existing technologies for the extraction of polysaccharides and lignin from lignocellulosic materials from an ecological and economic point of view are imperfect. The solution of this actual problem at present day is possible by heat treatment of lignocellulosic materials at the atmospheric pressure and relatively low temperature in the environment of ionic liquids. The use of ionic liquids for the fractionation of lignocellulosic raw materials isn't found industrial application because of their relatively high cost and sensitivity to contamination, despite the unique set of physico-chemical properties for dissolving cellulose. The solution of the problem is possible by reusing ionic liquid in the technological process without losing their effectiveness, which requires purification from impurities. The purpose of thе work was the comparative research of the efficiency of purification of 1-butyl-3-methylimidazolium chloride by adsorption on activated carbon, liquid extraction by organic solvents (benzene, dioxane, tetrahydrofuran) and supercritical CO2 extraction. It has been established that the methods of liquid extraction, supercritical CO2 extraction and adsorption on activated carbon can be used to purify 1-butyl-3-methylimidazolium chloride from extractives of wheat straw. For the purpose of comparison of efficiency of purification with above-mentioned methods the GC-MS, IR- and 1H NMR spectroscopy were used. It was revealed that extraction of impurities by organic solvents, such as benzene, dioxane and tetrahydrofuran, allows to reduce significantly their content in ionic liquid while supercritical CO2-extraction and adsorption on activated carbon almost completely remove impurities. Considering the substantial losses of the ionic liquid when using adsorption to purify 1-butyl-3-methylimidazolium chloride from the extractives of wheat straw, a supercritical CO2 extraction method can be recommended for use.Forcitation:Evstaf’ev S.N., Hoang C.Q. Purification of 1-butyl-3-methylimidazolium chloride after dissolution of wheat straw. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 3. P. 83-87

Tunable, UV-shielding and biodegradable composites based on well-characterized lignins and poly(butylene adipate-co-terephthalate)

2020 ◽  
Vol 22 (24) ◽  
pp. 8623-8632
Author(s):  
Han-Min Wang ◽  
Bin Wang ◽  
Tong-Qi Yuan ◽  
Lu Zheng ◽  
Quentin Shi ◽  
...  
Keyword(s):  
Composite Materials ◽  
Modern Society ◽  
Biodegradable Composites ◽  
Uv Shielding ◽  
Biodegradable Composite ◽  
Reducing Costs ◽  
Friendly Character

Biodegradable composite materials are increasingly imperative in modern society owing to their eco-friendly character, and further reducing costs and improving compatibility of composites will facilitate their applications.

POLYOXOMETALATE-IONIC LIQUIDS (POM-ILs)–THE ULTIMATE SOFT POLYOXOMETALATES? A CRITICAL PERSPECTIVE

2014 ◽  
Vol 02 (01) ◽  
pp. 1440001 ◽  
Author(s):  
SVEN HERRMANN ◽  
ANDREY SELIVERSTOV ◽  
CARSTEN STREB
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
State Of The Art ◽  
Critical Perspective ◽  
Active Materials ◽  
Initial Development ◽  
Electrochemically Active ◽  
Recent Developments ◽  
Key Features

In this paper, a critical perspective on the state-of-the-art, current developments and future applications of polyoxometalate-ionic liquids (POM-ILs) is presented. This paper is focused on recent developments for true polyoxometalate ionic liquids, where the POM cluster acts as the anionic component in an ionic liquid. A brief overview of the initial development of POM-ILs is given and key features of the materials such as viscosity, conductivity and thermal stability are compared. Current applications of POM-ILs are exemplified and the advantages as well as limitations of POM-ILs for usage as catalysts, sensors and electrochemically active materials are discussed. Potential future areas of application are described and initial studies in these areas are highlighted.

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

Dynamics of Ion Locking in Doubly Polymerized Ionic Liquids

2020 ◽  
Author(s):  
Swati Arora ◽  
Julisa Rozon ◽  
Jennifer Laaser
Keyword(s):  
Dielectric Constant ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ion Pairs ◽  
Polymer Chains ◽  
Ion Motion ◽  
Charged Species ◽  
Broadband Dielectric Spectroscopy ◽  
Covalently Linked ◽  
Insight Into

<div>In this work, we investigate the dynamics of ion motion in “doubly-polymerized” ionic liquids (DPILs) in which both charged species of an ionic liquid are covalently linked to the same polymer chains. Broadband dielectric spectroscopy is used to characterize these materials over a broad frequency and temperature range, and their behavior is compared to that of conventional “singly-polymerized” ionic liquids (SPILs) in which only one of the charged species is attached to the polymer chains. Polymerization of the DPIL decreases the bulk ionic conductivity by four orders of magnitude relative to both SPILs. The timescales for local ionic rearrangement are similarly found to be approximately four orders of magnitude slower in the DPILs than in the SPILs, and the DPILs also have a lower static dielectric constant. These results suggest that copolymerization of the ionic monomers affects ion motion on both the bulk and the local scales, with ion pairs serving to form strong physical crosslinks between the polymer chains. This study provides quantitative insight into the energetics and timescales of ion motion that drive the phenomenon of “ion locking” currently under investigation for new classes of organic electronics.</div>

Ionic Liquid Assisted Synthesis of Some 2-Aminobenzenethiols

2019 ◽  
Vol 16 (7) ◽  
pp. 550-555
Author(s):  
Dinesh K. Jangid ◽  
Keshav L. Ameta ◽  
Surbhi Dhadda ◽  
Anjali Guleria ◽  
Prakash G. Goswami ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Comparative Study ◽  
Maximum Yield ◽  
Efficient Synthesis ◽  
Target Molecules ◽  
Presence And Absence

Ionic Liquid assisted efficient synthesis of some 2-aminobenzenethiols has been reported using three different Ionic Liquids (ILs) namely methylimidazolium tetrafluoroborate [MIM]+[BF4]−, methylimidazolium chloride [MIM]+[Cl]− and methylimidazolium nitrate [MIM]+[NO3]−. A comparative study has been carried out for the synthesis of target molecules in the presence and absence of IL, leading to conclusion that maximum yield has been observed with [MIM]+[BF4]−.

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