Preparation method of nanometer resin with high hygroscopy

Abstract

The invention discloses a preparation method of nanometer resin with high hygroscopy, which comprises the following steps: adopting crylic acid monomers to carry out graft copolymerization on carboxymethylcellulose; adding organic quaternary ammonium salt to modify montmorillonoid; and preparing CMC/acrylic polymers/OMMT nanometer resin with high hygroscopy through an in situ intercalation polymerization method of aqueous solution. The adoption of the carboxymethylcellulose and the montmorillonoid reduces the dosage of the acrylic polymers, so that the cost is lowered; and after the nanometer resin with the high hygroscopy is dried, the absorption of pure water can be 500g/g, the absorption of normal saline can be 130g/g, the gelstrength can be 13 times of that of the graft copolymerization materials, so the resin has good biodegradation property and can be bio-degraded within 3-4 months and is a green and environment-friendly water retention product. In addition, the raw materials used in the invention, namely the carboxymethylcellulose and montmorillonoid have wide sources, excellent biocompatibility, can remit the shortage of oil resources, and has obvious cost advantages and wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing a water-absorbing resin, in particular to a method for producing a superabsorbent nano-resin by using carboxymethyl cellulose (CMC), which is cheap, easy to obtain, reproducible, easily degradable and non-polluting, as a raw material. Background technique [0002] Super Absorbent Resin (SAR) is a functional polymer material with super water absorption capacity, which is widely used in agricultural and forestry production, landscaping, building materials, drought resistance and water retention, sand prevention and control, and other fields. Due to its huge market demand and high demand growth rate, it has become a very important polymer material in the development of the national economy and people's lives. [0003] Different fields of use have different performance requirements for SAR. The SAR suitable for agriculture and forestry should meet the requirements of "environmental friendliness, easy availab...

AI Technical Summary

Problems solved by technology

In recent years, acrylic polymers, the mainstream product of superabsorbent resins, are non-renewable resources because the synthetic raw materials come from petroleum, and the current petroleum resources are relatively insufficient, so it is difficult to increase reserves and stabilize production. Resin is difficult to be decomposed by microorganisms in the soil, and its salt tolerance is also poor, which limits its application and promotion. Therefore, the source of raw materials for superabsorbent resins, especially the comprehensive utilization of natural resources, is researched and developed with high water absorption capacity. A superabsorbent material with high gel strength, good salt tolerance and biocompatibility at the same time is a very important and urgent issue, which is also of great significance for expanding the application range of SAR in the field of agriculture.