Imidazolium-based Poly Ionic Liquid Research Articles

Physical and mechanical investigation for polyionic liquid/poly(vinyl alcohol) blends

PurposeThis study aims to polymerize of 1-butyl-3-vinylimidazolium bromide (PIL). PIL was embedded into PVA with a different content ratio by casting method. This research also deals with the effect of adding PIL in different proportions to PVA on the electrical and mechanical properties properties in addition to the morphology of the prepared samples.Design/methodology/approach1-Butyl-3-vinylimidazolium bromide was synthesized through quaternization and free radical polymerization. The resulting polymer was characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis and differential scanning calorimetry. In addition to the morphology of PVA, PVA/PIL was investigated by polarizing microscope. Also, the effect of PIL content on the electrical and mechanical properties was evaluated.FindingsThe findings of this study might lead to new applications for PVA and PILs in electrical and dielectrics. The mechanical results revealed that the tensile strength increased slightly with increasing polyionic liquid (PIL) content and decreased above 10% PIL. While the elongation at break increased significantly with increasing PIL content and begin to decrease above 10% PIL. Also, the electrical property of the poly(vinyl alcohol) (PVA)/PIL blends was improved because of the strong plasticizing effect of PIL. Also, the electrical conductivity of these polymer electrolytes is greatly increased. This indicates that the imidazolium-based PIL has an effective approach that leads to an increase in the conductivity of the polymer. The PILs/PVA design will not only enrich the chemical structure but also will contribute to green manufacturing techniques and a processing methodology that enables green membrane manufacture.Originality/valueThis study contributes to green manufacturing techniques and a processing methodology that enables “green” membrane manufacture.

Dehydration of heavy crude oil emulsions using novel imidazolium-based poly ionic liquids

Sea water/ heavy crude oil emulsions are highly stable and cause serious industrial problems. Amphiphilic poly ionic liquids (ILs) as environmentally safe chemicals can be used as highly efficient demulsifiers to for W/O emulsions. In the present work, two imidazolium-based poly ionic liquids (IMPIL-1 and IMPIL-2) were prepared via one pot modified Debus-Radziszewski reaction by the interaction of triethylenetetramine or diethylenetriamine with glyoxal and formaldhyde in aqeous acetic acid solution. The prepared PILs were after that reacted with glycidyl 4-nonylphenyl ether through the epoxy ring opening to produce two amphiphilic PILs. 1HNMR, DLS and drop shape analyzer were utilized to verify their chemical structures and surface properties of the prepared PILs. The surface properties of AIMPIL-1 and AIMPIL-2 and their ability to reduce the IFT of sea water/ crude oil interface recommended their application as demulsfiers for W/O emulsions. Factors affecting the demulsification properties like relative solubility index, Demulsifier dose and separation time were investigated. The results confirmed the high efficiency of AIMPIL-1 and AIMPIL-2 to act as demulsifiers for W/O emulsions with a priority to the less aminated AIMPIL-1 that reached 100% for emulsion compositions (30/70 and 10/90 vol%).