Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, People's Republic of China; Innovation Center for Textile Science and Technology of DHU, Donghua University, Shanghai, 201620, People's Republic of China.
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, People's Republic of China; Innovation Center for Textile Science and Technology of DHU, Donghua University, Shanghai, 201620, People's Republic of China.
Carbohydr Polym. 2020 Apr 15;234:115934. doi: 10.1016/j.carbpol.2020.115934. Epub 2020 Jan 30.
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.
具有纤维素纳米晶复合聚甲基丙烯酸甲酯（PMMA）壳和正二十烷核的微胶囊相变化复合材料（MPCMs）通过 Pickering 乳液辅助溶剂蒸发法制备。PMMA 和正二十烷溶解在氯仿中作为油相。纤维素纳米晶（CNC）可以有效地稳定油包水（O/W）乳液，核壳比将影响 MPCMs 的热性能，研究发现最佳核壳比为 1:2，包封率达到 58.2%。PMMA 封装的 MPCMs 呈现出规则的球形，尺寸在 5-10 微米范围内。它们具有良好的热稳定性和高达 150.8 J/g 的熔融焓。热循环测试结果表明，在 100 次加热-冷却循环后，MPCMs 的熔融焓保持在 99%以上。所提出的 Pickering 乳液辅助溶剂蒸发法为微胶囊相变化材料的工业生产提供了一种潜在的方法。
