Polysaccharide assisted microencapsulation for volatile phase change materials with a fluorescent retention indicator

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@article{10f11c2f0f514b22b5f5bd098c28f7b3,
title = "Polysaccharide assisted microencapsulation for volatile phase change materials with a fluorescent retention indicator",
abstract = "Low freeze point paraffin-based phase change materials (PCMs) for thermal energy storage often have very high vapor pressure, rendering it extremely challenging to encapsulate. This work reports our success in fabricating amino resin microcapsules with low freeze point PCMs cargos. Our findings challenge the emulsifier selection criteria proposed a decade ago, and enable better understanding of the role of emulsifiers in the one-step encapsulation process without precondensate synthesis. A facile, low cost, efficient and efficacious screening method utilizing a fluorophore is reported here for fast examination of core retention without resorting to more complex but unnecessary quantification techniques. This method is transferable to other encapsulation methods or materials as a qualitative analysis tool. We report two new emulsifiers, i.e. xanthan gum and methylcellulose, which contribute to successful encapsulation of volatile cargos via the one-step in situ polymerization route. The concentration of xanthan gum affects not only the capsule size, but also shell thickness and surface roughness. Most importantly, we have demonstrated with methylcellulose that carboxyl or anhydride moieties in emulsifiers are not essential for the one-step process, contrary to the literature. Capsules produced with methylcellulose also demonstrate superior thermal cycling fatigue resistance.",
keywords = "Microcapsules, in situ polymerization, Emulsifiers, fluorescent, Phase change materials, PCM",
author = "Yan Zhang and Zhu Jiang and Zhibing Zhang and Yulong Ding and Qinghua Yu and Yongliang Li",
year = "2019",
month = mar,
day = "1",
doi = "10.1016/j.cej.2018.11.054",
language = "English",
volume = "359",
pages = "1234--1243",
journal = "Chemical Engineering Journal",
issn = "1385-8947",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Polysaccharide assisted microencapsulation for volatile phase change materials with a fluorescent retention indicator

AU - Zhang, Yan

AU - Jiang, Zhu

AU - Zhang, Zhibing

AU - Ding, Yulong

AU - Yu, Qinghua

AU - Li, Yongliang

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Low freeze point paraffin-based phase change materials (PCMs) for thermal energy storage often have very high vapor pressure, rendering it extremely challenging to encapsulate. This work reports our success in fabricating amino resin microcapsules with low freeze point PCMs cargos. Our findings challenge the emulsifier selection criteria proposed a decade ago, and enable better understanding of the role of emulsifiers in the one-step encapsulation process without precondensate synthesis. A facile, low cost, efficient and efficacious screening method utilizing a fluorophore is reported here for fast examination of core retention without resorting to more complex but unnecessary quantification techniques. This method is transferable to other encapsulation methods or materials as a qualitative analysis tool. We report two new emulsifiers, i.e. xanthan gum and methylcellulose, which contribute to successful encapsulation of volatile cargos via the one-step in situ polymerization route. The concentration of xanthan gum affects not only the capsule size, but also shell thickness and surface roughness. Most importantly, we have demonstrated with methylcellulose that carboxyl or anhydride moieties in emulsifiers are not essential for the one-step process, contrary to the literature. Capsules produced with methylcellulose also demonstrate superior thermal cycling fatigue resistance.

AB - Low freeze point paraffin-based phase change materials (PCMs) for thermal energy storage often have very high vapor pressure, rendering it extremely challenging to encapsulate. This work reports our success in fabricating amino resin microcapsules with low freeze point PCMs cargos. Our findings challenge the emulsifier selection criteria proposed a decade ago, and enable better understanding of the role of emulsifiers in the one-step encapsulation process without precondensate synthesis. A facile, low cost, efficient and efficacious screening method utilizing a fluorophore is reported here for fast examination of core retention without resorting to more complex but unnecessary quantification techniques. This method is transferable to other encapsulation methods or materials as a qualitative analysis tool. We report two new emulsifiers, i.e. xanthan gum and methylcellulose, which contribute to successful encapsulation of volatile cargos via the one-step in situ polymerization route. The concentration of xanthan gum affects not only the capsule size, but also shell thickness and surface roughness. Most importantly, we have demonstrated with methylcellulose that carboxyl or anhydride moieties in emulsifiers are not essential for the one-step process, contrary to the literature. Capsules produced with methylcellulose also demonstrate superior thermal cycling fatigue resistance.

KW - Microcapsules

KW - in situ polymerization

KW - Emulsifiers

KW - fluorescent

KW - Phase change materials

KW - PCM

UR - http://www.scopus.com/inward/record.url?scp=85056285282&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2018.11.054

DO - 10.1016/j.cej.2018.11.054

M3 - Article

AN - SCOPUS:85056285282

VL - 359

SP - 1234

EP - 1243

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

ER -