Preparation method of lauryl alcohol/melamine-formaldehyde resin microcapsule phase-change material

Abstract

The invention discloses a preparation method of a lauryl alcohol / melamine-formaldehyde resin microcapsule phase-change material, and relates to preparation of a microcapsule phase-change material with an in-situ polymerization method. The method comprises the following steps: adding formaldehyde and a solvent to melamine, adjusting the pH to 8-9 by triethanolamine, and stirring until the solution is transparent, thereby obtaining a melamine-formaldehyde resin prepolymer; mixing an emulsifier, a cross-linking agent, a solvent and lauryl alcohol, and stirring for emulsifying, thereby obtaining a core material lauryl alcohol solution; adding the melamine-formaldehyde resin prepolymer to the core material lauryl alcohol solution, then adjusting the pH to 3-4 by formic acid, and stirring, thereby obtaining a lauryl alcohol / melamine-formaldehyde resin microcapsule phase-change material suspension; washing, suction-filtering, and baking to obtain the dried lauryl alcohol / melamine-formaldehyde resin microcapsule phase-change material powder. The prepared microcapsule has the small particle size of 1-2 microns, is even in particle size distribution, smooth in surface, round in shape and good in leakproofness, and has broad application prospect.

Description

technical field [0001] The invention relates to an in-situ polymerization method for preparing microcapsule phase change materials, in particular to a preparation method for dodecanol / melamine-formaldehyde resin microcapsule phase change materials. Background technique [0002] Energy is the basis for human survival. At present, with the rapid development of the global industry, the global energy is increasingly scarce, and the energy depletion crisis and environmental pollution have attracted more and more attention. Improving the efficiency of energy use and developing renewable energy are important issues facing human beings. At this time, energy storage is particularly important. For energy storage, thermal energy storage is the most used. Energy storage technology can be used to solve the contradiction between thermal energy supply and demand mismatch. It is an important technology to improve energy utilization efficiency and protect the environment. The field has br...

AI Technical Summary

Problems solved by technology

Some literatures have reported the preparation of microcapsule phase change materials by in-situ polymerization. Xiong Wei and other researchers published "Phase Change Energy Storage Micro "Preparation and Characterization of Capsules" paper; Liu Si and other researchers published the paper "Preparation and Performance Characterization of Phase Change Microcapsules for Clothing" in Guangdong Chemical Industry, Vol. 40, No. 2, Page 3-4, 2013, Shandong The patent applied by the Institute of New Materials of the Academy of Sciences is a high-temperature-resistant phase-change material microcapsule and its preparation method (publication number: 101376800), and the patent applied by China Lucky Film Group Corporation is a preparation method of microcapsules ( Publication number: CN1654116A), however, in these methods, it is impossible to ensure that all the polymerization occurs on the surface of the liquid microspheres. The microcapsules prepared by this method have a rough surface, poor airtightness and microcapsules distributed on the surface of the polymerization. In the resulting block polymer, it is impossible to separate or uniformly disperse the microcapsules, which makes the subsequent use of microcapsules or the manufacture of products quite difficult

Images