Method for preparing carbon foam using aryl ethane monomer

Abstract

The invention relates to a way to prepare carbon foam by aryl acetylene metamer which relates to the preparing technology of carbon foam. The way includes the following steps: choosing the material, the ratio (by weight) of meta-ethynylbenzene to para- ethynylbenzene is 5:2 and the purity is larger than 90-94%; adding blowing agent (skellysolve A) and foam-distributing agent; heating and stirring the solution; adding curing agent (sulphuric acid) and keep on stirring at constant temperature; blowing up the solution during solidifying process to get part of the solidified foam; cleaning the mentioned foam to remove the blowing agent and foam-distributing agent; classifying and completely solidifying the foam, the solidifying procedure includes the following steps: drying at 120 Deg C for 2h; drying at 150 Deg C for 2h; drying at 180 Deg C for 2h, drying at 200 Deg C for 2h and post-treating the foam at 350 Deg C under the atmosphere of nitrogen for 4h to get poly-aryl acetylene foam; heating under nitrogen atmosphere from room temperature to 900 Deg C at a speed of 10 Deg C / min while keeping the temperature for 180min to carbonize the foam; cooling the foam to room temperature to get carbon foam. The invention requires simple technologies and devices and has also solved the problem of poor mechanical function and hard to control the structure of the foam products.

Description

technical field [0001] The invention discloses a method for preparing carbon foam by using aryl acetylene monomer, relating to a preparation technology of carbon foam. Background technique [0002] Carbon foam is a light solid carbon material with carbon atoms as the skeleton and a porous network structure formed by stacking carbon atoms with each other. Its density ranges from 0.12 to 0.8 g cm -3 , The porosity is above 70%, of which open pores account for about 96%, and the diameter of the pores is more than ten nanometers to several hundred micrometers. Carbon foam has a series of remarkable physical properties such as its unique microstructure, large specific surface area, high porosity, excellent adsorption, low thermal expansion coefficient and good compression resistance. It is used in thermal control materials, It has broad application prospects in battery electrodes, supercapacitors, catalyst carriers, technical separation, aerospace and oth...

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned methods can obtain carbon foam, some methods have expensive raw materials and require high-pressure treatment, and the requirements for reaction equipment are high; some methods have very low yields and are difficult to carry out industrial production; application

In short, because the preparation of carbon foam has to overcome several difficulties such as cumbersome preparation process, uneasy control of product structure and poor mechanical properties, so far, no carbon foam preparation method with simple process, easy structure control and excellent product performance has been found at home and abroad.