Showing papers by "Yoshinori Takashima published in 2019"
TL;DR: In this article, the authors used permethylated cyclodextrins (PM-CDAAmMe) or peracetylated cyclodesxtrin (PAc-CDaamMe), which are soluble in various hydrophobic liquid acrylate monomers, and they can form inclusion complexes with guest monomers such as adamantane or fluoroalkyl groups tethered to a vinyl residue.
Abstract: We prepared acrylamide monomers with permethylated cyclodextrins (PM-CDAAmMe) or peracetylated cyclodextrins (PAc-CDAAmMe). PM-CDAAmMe and PAc-CDAAmMe are soluble in various hydrophobic liquid acrylate monomers, and they can form inclusion complexes with guest monomers such as adamantane or fluoroalkyl groups tethered to a vinyl residue. The bulk polymerization of the liquid acrylate monomers with the PM-CDAAmMe or PAc-CDAAmMe monomers and the guest monomers gave highly flexible and tough elastomers. Tensile tests on the obtained supramolecular elastomers showed fracture strains of over 800% and fracture energies that were 12 times larger than those of covalently cross-linked conventional elastomers, indicating that the host–guest cross-linking made the supramolecular elastomers quite tough. During the deformation process, the applied stress is dispersed into the supramolecular elastomers by dissociation and recombination of the reversible host–guest complex. Moreover, these host–guest complexes also allo...
70 citations
TL;DR: In this article, the fracture energy of the resulting polymeric material is higher than that of the polymeric materials without non-covalent interactions as well as that with one non-Covalent interaction.
28 citations
TL;DR: In this paper, high flexible and tough elastomers were obtained from the bulk copolymerization of a peracetylated cyclodextrin (CD) monomer and small alkyl acrylate main chain monomers without a guest monomer.
Abstract: Highly flexible and tough elastomers were obtained from the bulk copolymerization of a peracetylated cyclodextrin (CD) monomer and small alkyl acrylate main chain monomers without a guest monomer. ...
25 citations
TL;DR: The supramolecular polymeric IG was prepared from bulkCopolymerization of the host–guest complex between peracetylated γ-cyclodextrin and 2-ethyl-2-adamantane in the presence of acrylate followed by immersing the copolymer in 1- methyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIm TFSI).
Abstract: Ionic liquid gels (IGs) have received much attention due to their electrochemical properties. IGs previously reported were formed by chemically cross-linked structures. The ionic conductivity (σ) o...
20 citations
TL;DR: In this paper, an efficient synthesis to prepare polymeric membranes containing cyclodextrins (CDs) was disclosed, and the specific surface area of the CD membrane (BP) is 10 times higher than that of a CD-based polymeric membrane prepared via solution casting using a solution containing poly(ethyl acrylate) and PAcγCD.
20 citations
TL;DR: In this article, a β-cyclodextrin (β-CD) cross-linked polymer monolith (CD monolith) was constructed by phase separation technique and effective removal of the pollutants by using prepared CD monolith columns.
11 citations
TL;DR: In this paper, the authors focus on the mechanical properties and self-recovery behaviors of supramolecular polymeric elastomers swollen with ionic liquid and gain insight into the correlation between ionic fluid content and mechanical properties.
Abstract: Supramolecular materials have received considerable attention due to their higher fracture energy and self-recovery capability compared to conventional chemically cross-linked materials. Herein, we focus on the mechanical properties and self-recovery behaviours of supramolecular polymeric elastomers swollen with ionic liquid. We also gained insight into the correlation between ionic liquid content and mechanical properties. These supramolecular polymers with ionic liquid can be easily prepared from bulk copolymerization of the host–guest complex (peracetylated cyclodextrin and adamantane derivatives) and alkyl acrylates and subsequent immersion in ionic liquid such as 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. The supramolecular polymeric elastomers showed a self-recovery ability, which the conventional chemically cross-linked elastomers with ionic liquid cannot achieve.
10 citations
TL;DR: This work prepared polymeric materials cross-linked by donor-acceptor (DA) interactions between pyrene (Py) and trinitrobenzene (TNB) on the same polymer side chain with high fracture energy.
8 citations
6 citations