Method for preparing solid aldehyde cloth through two-step method

Abstract

The invention relates to a method for preparing solid aldehyde cloth through a two-step method, and belongs to the technical field of high polymer material manufacturing. The method comprises the following steps: soaking a hydrophilic fiber product in a mixed solution of polyamine and a cross-linking agent, and heating and curing at 70-100 DEG C to obtain a polyamine modified matrix material; and soaking the material in a polyaldehyde aqueous solution with the solution temperature of 10-20 DEG C for 5-20 minutes, taking out the material, washing the material with water to remove free aldehyde groups, and vacuumizing to 0.3 Mpa to obtain the solid aldehyde cloth. The cross-linking agent is a substance with nitrogen rings at both ends of a molecular skeleton, oxygen rings at both ends of the molecular skeleton or lipid groups at both ends of the molecular skeleton. According to the solid aldehyde cloth prepared through the method, a large number of aldehyde groups are fixed to the surface of the base material, the content of the aldehyde groups can reach 6.1 mmol / g, stability is good, harm caused by volatilization of polyaldehyde to the human body is avoided, the steps are simple, the reaction conditions are mild, energy consumption is low, and the method is suitable for industrial large-scale production.

Description

technical field

[0001] The invention relates to a two-step method for preparing solid aldehyde cloth, which belongs to the technical field of polymer material manufacturing. Background technique

[0002] Aldehyde disinfectants mainly rely on the alkylation reaction between the aldehyde group and the sulfhydryl group, hydroxyl group, carboxyl group and amino group of the bacterial protein, so that the protein coagulates and achieves the purpose of disinfection and sterilization. Among the known aldehydes, glutaraldehyde is the best protein cross-linking agent. The cross-linking features are high activity, fast reaction, high binding capacity, stable product, and strong resistance to boiling water, acid, and enzymes. The sterilizing concentration of glutaraldehyde is 2%. There are mainly two types of glutaraldehyde on the market: 2% alkaline glutaraldehyde and 2% fortified acid glutaraldehyde. Glutaraldehyde has the strongest bactericidal effect when the pH is 7.5-8.5. The s...

Images