Modified carbon foam phenolic resin and preparation method thereof

Abstract

The invention relates to a modified carbon foam phenolic resin and a preparation method thereof. The modified carbon foam phenolic resin is prepared from the following raw materials: 100 mole fractions of phenol, 120-180 mole fractions of paraformaldehyde, 10-15 mole fractions of modifying agents, 0.1%-0.2% by weight of silane coupling agents relative to the weight percent of phenol and 2-4 mole fractions of catalysts. When the modified carbon foam phenolic resin is prepared, the method comprises the following steps of: adding the raw materials to a reaction kettle for uniform stirring; then heating to 70-80 DEG C, and then stopping heating; keeping temperature for 3-5 hours; and finally stopping reaction and reducing the temperature to acquire a finished product. The modified carbon foam phenolic resin disclosed by the invention is added with the silane coupling agents and increases the bonding force of a resin base and an inorganic substance, thereby enhancing the strength of a carbon foam product; and the modified carbon foam phenolic resin disclosed by the invention can be used for enhancing the toughness of synthetic resin and increasing the carbon residues of the synthetic resin by adding cyanamide and boride modifying agents and overcoming the defects of wastewater generation in a common preparation process, is favorable to environmental protection and has the characteristics of light weight, high strength, heat insulation, and the like by utilizing carbon foam materials prepared through the foaming ignition of the carbon foam resin.

Description

technical field [0001] The invention relates to a modification of phenolic resin and a preparation method thereof, which is suitable for foaming and burning at a high temperature to prepare carbon foam products. Background technique [0002] Ordinary phenolic resins are mostly synthesized by the synthesis method of thermosetting phenolic resins. Specifically, it is prepared by polymerizing phenol and excess formaldehyde aqueous solution (aqueous solution with a formaldehyde content of 37%) under the catalysis of alkaline substances (such as ammonia water, sodium hydroxide, barium hydroxide, etc.). Vacuum dehydration is required in the production process, resulting in waste water containing phenol and aldehyde. As we all know, the discharge of waste water will definitely cause environmental pollution. Moreover, the carbon foam material produced by the phenolic resin produced by this method has low strength and poor toughness, and cannot meet the requirements for use as a ca...

AI Technical Summary

Problems solved by technology

As we all know, the discharge of waste water will definitely cause environmental pollution

Moreover, the carbon foam material produced by the phenolic resin produced by this method has low strength and poor toughness, and cannot meet the requirements for use as a carbon foam material.