A Concise Review on the Physicochemical Properties of Biopolymer Blends Prepared in Ionic Liquids

Abstract

An enhancement of environmental concern lately has improved the awareness of researchers in employing eco-friendly solvents for processing biopolymers. Recently, ionic liquids have been utilized to prepare biopolymer blends as they are non-volatile and recyclable. Biopolymers such as cellulose, chitin, chitosan, keratin, lignin, silk, starch, and zein are widely used for the preparation of biopolymer blends via dissolution in ionic liquids, followed by coagulation procedure. In this concise review, three types of ionic liquids based on imidazolium cations combined with different counter anions that are frequently utilized to prepare biopolymer blends are described. Moreover, three types of biopolymer blends that are prepared in ionic liquids were classified, specifically polysaccharide/polysaccharide blends, polysaccharide/polypeptide blends, and polysaccharide/bioplastic blends. The physicochemical properties of biopolymer blends prepared in different imidazolium-based ionic liquids are also concisely reviewed. This paper may assist the researchers in the polymer blend area and generate fresh ideas for future research.

Application of Quaternary Ammonium Compounds as Compatibilizers for Polymer Blends and Polymer Composites—A Concise Review

“…In the past decade, QAILs have been utilized in adsorption/desorption studies [52], catalysis systems, electrochemical studies, metal nanostructures, analytical chemistry including sensors, bio-analytical chemistry, electrochemical biosensors [53], and CO 2 capture systems [54]. The exceptional properties of QAILs, such as good interaction with organic and inorganic materials, make them suitable chemical compounds for applying in the polymer blends and polymer composites [55]. Table 6 exhibits the examples of QAILs applied for compatibilization of polymer blends and polymer composites.…”

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

“…This phenomenon is influenced by the length of the cation alkyl chain [6] Ionic liquids are ionic compounds that have liquid property below 100 • C. They are non-volatile since they have a low vapor pressure. Ionic liquids are also regarded as an environmentally benign solvent because they can be recycled [3]. Moreover, ionic liquids have interesting solvent properties, for instance, good solubility with countless organic solvents, high thermal stability, good electrical conductivity, high polarity, and non-flammability [4].…”

A Brief Review on the Influence of Ionic Liquids on the Mechanical, Thermal, and Chemical Properties of Biodegradable Polymer Composites

“…Organic materials, for example, cellulose [ 2 , 3 , 4 , 5 , 6 ] corn starch [ 7 , 8 ] modified starch [ 9 ] rice starch [ 10 ] chitin [ 11 , 12 ] rice husk [ 13 ] and wood flour [ 14 ] have commonly been used as organic fillers to prepare biodegradable polymer composites. This is due to their biodegradability, renewability, economy, and availability [ 15 ]. On the other hand, inorganic materials, such as multiwalled carbon nanotubes [ 16 , 17 , 18 , 19 ] graphene oxide [ 20 , 21 ] graphene [ 22 , 23 ] layered double hydroxide [ 24 , 25 , 26 , 27 ] montmorillonite [ 28 , 29 ] ammonium polyphosphate [ 30 ] and zinc oxide [ 31 ] have been used as inorganic fillers.…”