Acid modified palygorskite-polyurethane porous material as well as preparation method and application thereof

Abstract

The invention discloses an acid modified palygorskite-polyurethane porous material as well as a preparation method and an application thereof, belonging to the technical field of synthesis of inorganic-organic materials. According to the preparation method of the acid modified palygorskite-polyurethane porous material, palygorskite is modified for preparing acid modified palygorskite, polybasic alcohol, foaming agent, a foaming stabilizer, water and a catalyst are added, mixed and uniformly stirred, then diisocyanate is added for mixing and foaming at a temperature of 50-70 DEG C, and finally the mixture is subjected to aging at the temperature of 90-105 DEG C for 1-2 hours, and after being cooled, the acid modified palygorskite-polyurethane porous material is obtained. Aiming to the characteristics of rich reserves, low cost, non-abrasion property, high chemical stability, large specific surface area and the like of palygorskite, the preparation method of acid modified palygorskite-polyurethane porous material via foaming by one step is provided. Additionally, by the adoption of the prepared acid modified palygorskite-polyurethane porous material in the absorption of cationic dye, the operation is simple, the cost is low, the absorption rate is high, and the use value is higher.

Description

Technical field [0001] The invention is the field of inorganic-organic materials synthesis, which involves acid-modified bumpy soil-polyurethane polyita, which specializes in a acid-modified bumpy soil-polyurethane porous material and its preparation methods and applications. Background technique [0002] With the rapid development of the dye industry and the advancement of post -finishing technology, new auxiliary agents, dyes, and finishing agents have been used in the printing and dyeing industry. The resulting printing and dyeing wastewater has also become one of the main harmful wastewater.The components of the dye wastewater, high concentration, deep chroma, good hydrophilicity, poor biochemical and harmfulness, and difficult to degrade the content of toxic organic ingredients.Organic objects are increasingly threatened and harmful to the environment, especially the water environment.Pollution and toxicity of dye wastewater have become a key issue for the survival and devel...

AI Technical Summary

Problems solved by technology

[0011] (1) Dyeing and Finishing Technology, 2008, 30(12): 6-10, reported the use of polydimethyldiallylammonium chloride (PDMDAAC) and sodium dodecyl sulfate (SDS) modified attapulgite on the adsorption of trace methylene blue in simulated polluted water. The results show that the removal rate of methylene blue in wastewater can reach 98.56%, but there are certain requirements for the pH value of wastewater solution. Not easy to separate after adsorption;

[0012] (2) Water purification technology, 2009, 28(2): 68-71, reported the adsorption test of modified attapulgite on basic blue 54, The results show that the maximum adsorption capacity of modified attapulgite to basic blue 54 can reach 550 mg / g, but the modified attapulgite is still powdery solid, which is not easy to separate;

[0013] (3) Journal of Hazardous Materials, 2011, 194: 7-14, reported the preparation of attapulgite modified with amino-terminated organosilicon and was successfully used in Adsorption of reactive red 3BS, reactive blue KE-R, and reactive black GR, the results show that the modified attapulgite can adsorb 99.32%, 99.67% and 96.42% of the three reactive dyes, but in the preparation process used APTES and toluene are poisonous and pollute the environment when inhaled;

[0014] (4) Chemical Engineering Journal, 2011, 166: 40-48, reported the synthesis of β-cyclodextrin / attapulgite material and its use in aqueous solution 2, Adsorption of 4-dichlorophenol and 2,6-dichlorophenol, but the reaction temperature is high, the reaction time is long, and a large amount of energy is consumed. At the same time, a large amount of DMF is required, which increases the cost;

[0015] (5) Chemical Engineering Journal, 2012, 183: 315-324, reported the preparation of low-cost, high-efficiency zirconium-modified attapulgite adsorbent and successfully For the adsorption of fluoride, the results show that the adsorption capacity of the modified adsorbent becomes larger, but its preparation process is more complicated and the reaction conditions are higher;

[0016] (6) European Polymer Journal, 2007, 43: 3766-3772, reported the preparation of water-based polyurethane / attapulgite nanocomposites, and the results showed that attapulgite modified The heat resistance, tensile strength and elongation at break of the resulting waterborne polyurethane were improved, but the adsorption of cationic dyes was not further studied