title: Preparation of CMC-modified melamine resin spherical nano-phase change energy storage materials.
abstract: A novel carboxymethyl cellulose (CMC)-modified melamine-formaldehyde (MF) phase change capsule with excellent encapsulation was prepared by in situ polymerization. Effects of CMC on the properties of the capsules were studied by Fourier transformation infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), scanning electronic microscopy (SEM), X-ray diffractometry (XRD), and thermogravimetric analysis (TGA). The results showed that the CMC-modified capsules had an average diameter of about 50nm and good uniformity. The phase change enthalpy of the capsules was increased and the cracking ratio decreased by incorporating a suitable amount of CMC. The optimum phase change enthalpy of the nanocapsules was 83.46J/g, and their paraffin content was 63.1%. The heat resistance of the capsule shells decreased after CMC modification. In addition, the nanocapsule cracking ratio of the nanocapsules was 11.0%, which is highly attractive for their application as nano phase change materials.
authors.affiliation: Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Hu
authors.forename: Zhanhua
authors.initials: Z
authors.lastname: Huang
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D004355:Drug Stability; D005557:Formaldehyde / Q000737:chemistry; D053769:Nanocapsules / Q000737:chemistry*; D058105:Polymerization; D012117:Resins, Synthetic / Q000737:chemistry*; D013696:Temperature; D014227:Triazines / Q000737:chemistry*
chemical_list: D053769:Nanocapsules; D012117:Resins, Synthetic; D014227:Triazines; D005557:Formaldehyde; D002266:Carboxymethylcellulose Sodium; C011907:melamine
keywords: Carboxymethyl cellulose; Melamine resin; Nanocapsules; Phase change material; Sphere