Hydrophobic 1-allyl-3-alkylimidazolium dicyanamide ionic liquids with low densities
作者:Qinghua Zhang、Xiangyuan Ma、Shimin Liu、Benqun Yang、Liujin Lu、Yude He、Youquan Deng
DOI:10.1039/c1jm10491h
日期:——
Nine 1-allyl-3-alkylimidazolium ([ACnIm]) or 1-vinyl-3-alkylimidazolium ([VCnIm]) dicyanamides (DCA) were prepared and characterized, and their physicochemical properties were studied in detail. Except for [AVIm]DCA and [AC4Im]DCA, the other dicyanamides with hexyl or longer alkyl chains on the cation exhibited the characteristic of hydrophobicity. Among them, [AC8Im]DCA and [AC10Im]DCA were found to possess similar densities to water, i.e. 1.007 g cm−3 and 0.988 g cm−3 at 25 °C, respectively. Interestingly, a reversible phase reversion of a [AC8Im]DCA/H2O mixture was observed as the temperature varied. These environmentally-friendly liquid materials have potential applications as precursors for syntheses of conducting polymeric materials.
制备并表征了九种1-烯丙基-3-烷基咪唑双氰胺([ACnIm]DCA)或1-乙烯基-3-烷基咪唑双氰胺([VCnIm]DCA),并详细研究了它们的物理化学性质。除了[AVIm]DCA和[AC4Im]DCA外,阳离子带有己基或更长烷基的其他双氰胺表现出疏水性特征。其中,[AC8Im]DCA和[AC10Im]DCA的密度与水相似,分别为1.007 g cm−3和0.988 g cm−3(25°C)。有趣的是,随着温度的变化,观察到了[AC8Im]DCA/H2O混合物的可逆相变。这些环境友好的液体材料有望作为导电高分子材料合成的前驱体。
Poly(ionic liquid) Latexes Prepared by Dispersion Polymerization of Ionic Liquid Monomers
作者:Jiayin Yuan、Markus Antonietti
DOI:10.1021/ma102858b
日期:2011.2.22
vinylimidazolium-typed poly(ionic liquid) (PIL) latexes and nanoparticles via dispersionpolymerization of ionic liquid monomers in aqueous solutions. A homologous series of vinylimidazolium-typed ionic liquid monomers with different alkyl tail length (C8−C18) were synthesized via quaternization of 1-vinylimidazole with corresponding n-alkyl bromides. Dispersionpolymerization of these monomers was conducted
在这项贡献中,我们报告了通过离子液体单体在水溶液中的分散聚合反应,可以轻松制备乙烯基咪唑型的聚(离子液体)(PIL)胶乳和纳米颗粒。通过1-乙烯基咪唑与相应n的季铵化反应,合成了具有不同烷基尾长(C8-C18)的乙烯基咪唑鎓型离子液体单体的同源系列-烷基溴化物。这些单体的分散聚合反应是在70°C的水溶液中,以50 g / L的单体浓度进行的,而无需添加其他稳定剂。对于具有足够长的烷基链(≥C12)的离子液体单体,发现了直径为20-40 nm的PILs纳米颗粒,它们在水性介质中是自稳定的。在相同的步骤中,在10 mol%的基于二乙烯基咪唑基的交联剂的存在下进行交联的PIL纳米颗粒的制备。与双(三氟甲基磺酰基)酰亚胺锂进行阴离子交换后,合成后的交联PIL纳米颗粒可以转移到有机溶剂中,例如极性DMF和非极性甲苯。这种分散聚合不需要分散剂,并有可能在水溶液和有机溶液中大规模合成PIL纳米粒子。预期
Azolium Ionomer Derivatives of Halogenated Polymers
申请人:Parent J. Scott
公开号:US20120157579A1
公开(公告)日:2012-06-21
Nucleophilic substitution reactions of halogenated polymers and azoles are used to produce derivatives of polyolefins bear pendant azolium ionomers. These uncured ionomers are useful in adhesive, antimicrobial applications, as well as in polymer composites and polymer blends. Furthermore, these azolium ionomers' ion pairs can bear reactive functionality, which provides access to further reactions that were unavailable using previous technology. Advantageously, such reactive ionomer derivatives of polyolefins can be cured by free radical and moisture-curing chemistry that was unaccessible to the halogenated polymer parent material.
Nanoparticle dispersions with ionic liquid-based stabilizers
申请人:Texter John
公开号:US20110233458A1
公开(公告)日:2011-09-29
The disclosure generally relates to a dispersion of nanoparticles in a liquid medium. The liquid medium is suitably water-based and further includes an ionic liquid-based stabilizer in the liquid medium to stabilize the dispersion of nanoparticles therein. The stabilizer can be polymeric or monomeric and generally includes a moiety with at least one quaternary ammonium cation from a corresponding ionic liquid. The dispersion suitably can be formed by shearing or otherwise mixing a mixture/combination of its components. The dispersions can be used to form nanoparticle composite films upon drying or otherwise removing the liquid medium carrier, with the stabilizer providing a nanoparticle binder in the composite film. The films can be formed on essentially any desired substrate and can impart improved electrical conductivity and/or thermal conductivity properties to the substrate.
PROCESSES FOR NANOPARTICLE DISPERSIONS WITH IONIC LIQUID-BASED STABILIZERS
申请人:EASTERN MICHIGAN UNIVERSITY
公开号:US20150086721A1
公开(公告)日:2015-03-26
The disclosure generally relates to a dispersion of nanoparticles in a liquid medium. The liquid medium is suitably water-based and further includes an ionic liquid-based stabilizer in the liquid medium to stabilize the dispersion of nanoparticles therein. The stabilizer can be polymeric or monomeric and generally includes a moiety with at least one quaternary ammonium cation from a corresponding ionic liquid. The dispersion suitably can be formed by shearing or otherwise mixing a mixture/combination of its components. The dispersions can be used to form nanoparticle composite films upon drying or otherwise removing the liquid medium carrier, with the stabilizer providing a nanoparticle binder in the composite film. The films can be formed on essentially any desired substrate and can impart improved electrical conductivity and/or thermal conductivity properties to the substrate.