19812-60-3Relevant articles and documents
Effects of novel boric acid esters on ion transport properties of lithium salts in nonaqueous electrolyte solutions and polymer electrolytes
Tabata, Sei-Ichiro,Hirakimoto, Takuro,Tokuda, Hiroyuki,Susan, Md Abu Bin Hasan,Watanabe, Masayoshi
, p. 19518 - 19526 (2004)
Three novel polymerizable anion receptors based on boric acid esters have been synthesized. The addition of these monomers appreciably enhanced the ionic conductivity of certain electrolyte solutions comprised of an aprotic organic solvent of low polarity and a lithium salt of low dissociation ability. Analysis of the viscosity and pulse-field-gradient spin-echo (PGSE) NMR results in association with the ionic conductivity data revealed that the conductivity enhancement originated from the increase in the degree of dissociation, resulting from the addition of these anion receptors. The 11B NMR spectra of dimethoxyethane electrolyte solutions with added boric acid ester monomers substantiated the finding that the ionic dissociation was facilitated by strong interaction between the Lewis-acidic anion receptor and Lewis-basic anions. The polymerizable anion receptor of the catechol borate derivative was cross-linked with a polyether macromonomer containing different lithium salts. The ionic conductivity could be correlated with glass transition temperatures of the polymer electrolytes by the WLF equation. The ionic conduction behavior of the boron polymer electrolytes was compared with that of the reference polymer electrolytes, and the lithium cation transference number was clarified to be higher for the former. The polymer electrolytes showed similar conduction behavior to that of the electrolyte solutions containing the anion receptor monomers.
Phosphate cross-linking agent and preparation method thereof, phosphate-based cross-linked gel polymer electrolyte and preparation method and application thereof
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Paragraph 0047-0048; 0056, (2020/08/17)
According to the invention, the safety of the battery can be improved based on introduction of phosphate into the gel polymer electrolyte, , the adjustable flexibility is improved by introduction of aPEO chain segment, and the stability and the polymerization capability are improved by introduction of acrylate; thus, further research is carried out on the basis of the prior art, the polyfunctional phosphate cross-linking agent is obtained and is applied to the preparation of the phosphate-based cross-linked gel polymer electrolyte, so the cross linking agent can be copolymerized with other functional monomers to synthesize gel polymer electrolyte; the gel polymer electrolyte has the advantages of simple and convenient preparation method, high ionic conductivity, high thermal stability andgood electrochemical stability, the assembled sodium ion battery has good cycling stability and high-temperature performance, and the phosphate-based gel polymer electrolyte with high safety is provided for quasi-solid sodium/lithium ion batteries.
Stabilized vesicles consisting of small amphiphiles for stepwise photorelease via UV light
Dong, Jianming,Zeng, Yi,Xun, Zhiqing,Han, Yongbin,Chen, Jinping,Lee, Ying-Ying,Li, Yi
experimental part, p. 1733 - 1737 (2012/06/15)
A small amphiphile consisting of hydrophilic tetraethylene glycol monoacrylate and hydrophobic alkyl chain which were connected by an o-nitrobenzyl unit, a photolabile group, was designed and synthesized. The critical aggregate concentration of the synthesized amphiphile was determined to be about 3 × 10-5 M by the fluorescence probe technique. Nanosized vesicles were prepared and stabilized by in-situ radical polymerization without altering the morphology. The polymeric vesicle was highly stable which retained vesicular shape under dilution or UV irradiation. Hydrophobic guests can be encapsulated within the vesicle membrane and released out of the vesicle by UV stimulus through splitting the amphiphilic structure of the amphiphile. Distinguished dose-controlled photorelease of the polymeric vesicle is achieved due to the maintenance of the vesicular shape integrity which makes the guest release depend on the cleavage amount of amphiphilic structure during UV irradiation. This study provides a promising strategy to develop stable drug delivery systems for sustained and phototriggered release.
