Cellulose nanocrystals-composited poly (methyl methacrylate) encapsulated n-eicosane via a Pickering emulsion-templating approach for energy storage. (15th April 2020)

• Record Type: Journal Article
• Authors: Wang, Feifei; Zhang, Yunchong; Li, Xiang; Wang, Bijia; Feng, Xueling; Xu, Hong; Mao, Zhiping; Sui, Xiaofeng
• Is Part Of: Carbohydrate polymers. Volume 234(2020)
• Publication Date: 2020-04-15
• Subjects: Cellulose nanocrystals -- Pickering emulsion -- Microencapsulated phase change composite materials -- Solvent evaporation; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2020.115934
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: MPCMs prepared from CNC-composited PMMA and n-eicosane via Pickering emulsion. The prepared MPCMs are thermally reliable and have encapsulation ratio up to 58.2 %. The procedure represents a low energy-consuming method to prepare MPCMs. Abstract: Microencapsulated phase change composite materials (MPCMs) with cellulose nanocrystals-composited poly (methyl methacrylate) (PMMA) as shell and n-eicosane as core was facially prepared via Pickering emulsion assisted solvent evaporation approach. PMMA and n-eicosane were dissolved in chloroform as the oil phase. Cellulose nanocrystals (CNC) can efficiently stabilize oil - in - water (O / W) emulsion, and the core-shell ratio will affect the thermal properties of MPCMs, study found that the optimal core-shell ratio was 1:2 and encapsulation ratio reached 58.2 %. The PMMA encapsulated MPCMs displayed a regular spherical shape sized in the range of 5–10 micrometers. They had favorable thermal stability and melting enthalpy of up to 150.8 J/g. Results of the thermal cycling tests showed melting enthalpy of MPCMs were maintained by over 99 % after 100 heating-cooling cycles. The proposed Pickering emulsion assisted solvent evaporation approach provides a potential way for industrial production of microencapsulated phase change materials.