Preparation of Microcapsules Containing Erythritol with Interfacial Polycondensation Reaction by Using the (W/O) Emulsion

Hayashi, Yasuhito; Fuchigami, Kiyomi; Taguchi, Yoshinari

doi:10.4236/jeas.2014.44014

Cited by 10 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7 The thermal energy is stored by the solidliquid PCMs, while the supporting materials maintain the solid shape of the form-stable PCMs. The supporting materials for form-stable PCMs can be ether inorganics such as diatomite, 6 SiO 2,8 TiO 2 9 and fly ash, 10 etc., or polymers such as polymethyl methacrylate, 11 polyurethane, 12 resin, 13 and polyaniline (PANI), 14,15 etc. Graphite-based materials are another kind of important supporting materials.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, polymer-supported sugar alcohols form-stable PCMs are rarely reported. 12,22,23 On the other hand, sugar alcohols in general exhibit very high and unstable supercooling, which is unfavorable for their applications. The reason why supercooling is occurred is still not fully understood.…”

Section: Introductionmentioning

confidence: 99%

“…The supporting materials for form-stable PCMs can be ether inorganics such as diatomite, 6 SiO 2, 8 TiO 2 9 and fly ash, 10 etc., or polymers such as polymethyl methacrylate, 11 polyurethane, 12 resin, 13 and polyaniline (PANI), 14,15 etc. The supporting materials for form-stable PCMs can be ether inorganics such as diatomite, 6 SiO 2, 8 TiO 2 9 and fly ash, 10 etc., or polymers such as polymethyl methacrylate, 11 polyurethane, 12 resin, 13 and polyaniline (PANI), 14,15 etc.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Preparation and characterization of erythritol/polyaniline form‐stable phase change materials containing silver nanowires

et al. 2019

View full text Add to dashboard Cite

Summary Sugar alcohols are promising solid‐liquid phase change materials (PCMs). However, problems such as possible leakage of liquid PCMs, high and unstable supercooling, and low thermal conductivity need to be solved. In this work, a novel form‐stable PCM in which m‐erythritol (ME), polyaniline (PANI), and silver nanowires (Ag NWs) were applied as solid‐liquid PCM, supporting material, and thermal conductive filler, respectively, was successfully prepared in anhydrous ethanol by surface polymerization of aniline. Form‐stable PCM with good form stability could be obtained when the ratio of ME/(aniline + ME) was no more than 78.7 wt%. The melting enthalpy (ΔHm) of the ME/PANI form‐stable PCMs could attain 234.8 J/g while that of the ME/PANI/Ag NWs form‐stable PCMs was about 220 J/g. In addition, the thermal conductivity of the form‐stable PCM was increased by 61.6% when 7.5 wt% Ag NW was added. Moreover, the supercooling of ME was effectively suppressed from 100°C for pure ME to 60°C, corresponding to an improvement of 40%, for the form‐stable PCM containing 7.5 wt% Ag NWs. The supercooling suppression could be ascribed to that PANI provided great amounts of nucleating centers and improved the nucleation kinetics, and Ag NWs improved the thermal diffusivity and thus increased the crystallization rate.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Preparation and characterization of erythritol/polyaniline form‐stable phase change materials containing silver nanowires

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Different types of microcapsules have been focused such as: encapsulation of dicyclopentadiene (DCPD) [4], a first generation selfhealing system containing a liquid healing agent and Grubb's catalyst particles based on ring opening metathesis polymerization (ROMP), microcapsules containing erythritol with interfacial polycondensation reaction by using the (W/O) emulsion [5], microcapsule for a self-repairing anticorrosion coating based on a polydimethylsiloxane (PDMS) [6] healing chemistry, microcapsule containing catalyst for self-healing polymeric material such stannous octoate or dibutyltindilaurate (DBTL) [7], etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Microcapsules From Prepolyurethanes

Thai¹

2018

JST

View full text Add to dashboard Cite

Polyurethane (PU) microcapsules containing toluene diisocyanate (TDI) healing agent were synthesized by mixing PU with chain extender ethyleneglycol (EG) via interfacial polymerization of oil-in-water (gum arabic emulsifier). The morphology and size of the capsules greatly depend on a variety of factors including dispersion speed and emulsifier ratio. The preparation of PU prepolymer and microcapsulation of TDI are presented. The diameter of smooth spherical microcapsules ranged from 93, 160 and 239 µm are produced by varying the agitation rate from 800 rpm to 1200 rpm. The core content of microcapsules is influenced by the ratio of chlorobenzene (CB) solvent in oil phase. The microcapsules have about 40.5 wt% of core which are capable of application in self-healing coatings when using 20 wt% CB and 17.5 wt% emulsifer ratio.

show abstract

“…As the preparation methods of microcapsules containing aqueous solution, the following preparation methods have been reported, the suspension polymerization method [5] [6], the interfacial polycondensation method [7] [8], the gelling in liquid method [9], the melting dispersion cooling method [10] [11], and the inverse interfacial polymerization method [12]. These preparation methods cleverly used the multiple emulsion such as (W/O)/W emulsion [13]…”

Section: Introductionmentioning

confidence: 99%

Preparation of Microcapsules Containing Dye Aqueous Solution and Investigation of Release Feature According to Preparation Method

Taguchi¹,

Saito²

2017

JEAS

Self Cite

View full text Add to dashboard Cite

Microcapsules containing the dye aqueous solution were prepared with three kinds of preparation methods and the release feature of microcapsules with each preparation method was mainly investigated. As a dye tried to microencapsulate, methylene blue was adopted, because methylene blue aqueous solution was changed in color with light irradiation and utilized in order to check the degree of river pollution. Microencapsulation using multiple emulsion was performed with the suspension polymerization method, the inverse interfacial polycondensation method and the suspension polymerization in parallel with the interfacial polymerization method, respectively. The release feature of microcapsules prepared with each preparation method was estimated with the solute permeability coefficient. It was found that the release feature of dye aqueous solution was different according to the preparation method and could be delicately controlled by microencapsulating with the suspension polymerization in parallel with interfacial polycondensation reaction and forming the polyurethane shell on the surface of the dye aqueous solution droplets.

show abstract

Preparation of Microcapsules Containing Erythritol with Interfacial Polycondensation Reaction by Using the (W/O) Emulsion

Cited by 10 publications

References 17 publications

Preparation and characterization of erythritol/polyaniline form‐stable phase change materials containing silver nanowires

Preparation and characterization of erythritol/polyaniline form‐stable phase change materials containing silver nanowires

Synthesis of Microcapsules From Prepolyurethanes

Preparation of Microcapsules Containing Dye Aqueous Solution and Investigation of Release Feature According to Preparation Method

Contact Info

Product

Resources

About