文献类型：期刊文献

英文题名：High-intensity ultrasound assisted manufacturing of melamine-urea-formaldehyde/paraffin nanocapsules

作者：Han, Shenjie[1] Lyu, Shaoyi[1] Wang, Siqun[1,2] Fu, Feng[1,3]

第一作者：Han, Shenjie

通信作者：Wang, SQ[1];Fu, F[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Univ Tennessee, Ctr Renewable Carbon, Knoxville, TN 37996 USA;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest R, Nanjing 210037, Jiangsu, Peoples R China

年份：2019

卷号：568

起止页码：75-83

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20190606487703);Scopus(收录号：2-s2.0-85061162104);WOS:【SCI-EXPANDED(收录号:WOS:000461361900009)】；

基金：This work was supported by the Fundamental Research Funds of CAF (No. CAFYBB2017ZX003), the National High-Tech R&D Program (863 Program) (Grant No. 2010AA101704), the USDA National Institute of Food and Agriculture, Hatch project 1,012,359 and the Special Fund for Forest Scientific Research in the Public Welfare (No. 201504603).

语种：英文

外文关键词：Melamine-urea-formaldehyde; Nanocapsule; Phase change material; Ultrasound treatment

摘要：The average diameters of encapsulated phase change materials (PCMs) affect their physical properties. In this study, the effects of the main emulsification variables (ultrasound time and output power of ultrasonic treatment) were explored and then melamine-urea-formaldehyde (MUF)/paraffin nanocapsules were obtained via an in-situ polymerization method. The influences of these variables on the stability of the MUF/paraffin nanoemulsions and the appearances, mean droplet diameter and thermos-physical properties of MUF/paraffin nanocapsules were investigated. Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), dynamic light scattering (DLS), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analyzer (TGA), and differential scanning calorimetry (DSC) were employed to characterize the morphologies, size distributions, and thermal stabilities of MUF/paraffin nanocapsules, respectively. The characterization results showed that the more stable nanoemulsion could be formed after ultrasonic treatment for 15 min under the output power at 600 W compared with mechanical stirring emulsification. When the ultrasonic output power was 600 W, the MUF/paraffin nanocapsules achieved the highest encapsulation efficiency (35.8%) and encapsulated paraffin in the MUF shell under the output power of 600 W was more than that obtained under other ultrasonic output power values. This study verified that the ultrasound-assisted emulsification process could be used to fabricate stable MUF/paraffin nanocapsules.