Raw material formula with high ink absorption nano-alumina and preparation method thereof

Abstract

The invention relates to a raw material formula with high ink absorption nano-alumina and a preparation method thereof. The preparation method has the following steps: aluminium isopropoxide is dissolved in isopropanol, a lower molecular weight organic addition agent is added, the temperature is raised to 70 to 90 DEG C, deionized water is gradually added, and inorganic acid is added for regulation; after reaction, a product generated is stirred at the temperature ranging from 70 to 90 DEG C, and the temperature is retained for 0.5 to 3 hours; then, the product is transferred into a reaction kettle, heated at the temperature ranging from 120 to 170 DEG C and stirred, and the temperature is retained for 5 to 8 hours; and after being cooled, the product is rinsed and dried, and finally the high ink absorption nano-alumina can be prepared. The high ink absorption nano-alumina is prepared from the raw material of organic aluminium salt, thereby enabling the purity to be high, and the particle diameter and the glomeration to be small; and the high ink absorption nano-alumina has high dispersivity in aqueous phase. The high ink absorption nano-alumina of the invention has proper specific surface and pore volume, and can be used as inorganic pigment with the function of ink absorption; and a high ink absorption and high glaze photopaper coating can be prepared from the high ink absorption nano-alumina used as the inorganic pigment.

Description

technical field [0001] The invention relates to a raw material formula and preparation method of nano-alumina with high ink-absorbing performance, especially the preparation and application of nano-alumina. Background technique [0002] With the popularity of digital cameras and computers, the demand for high-gloss color inkjet paper is increasing. At present, the main inorganic pigment used in color inkjet printing media is silica, but the gloss of silica coating is low. The aluminum oxide coating has no cracks. Under the same coating amount, the aluminum oxide coating has a higher gloss, which can give the photo paper a brilliant color effect. [0003] Nano-alumina is an important inorganic functional material with attractive application prospects. It is widely used in catalysts, adsorbents or binders for catalyst molding, and most of them are used to prepare catalyst supports in the petrochemical industry. [0004] Chinese patent CN 1868885A discloses a preparation metho...

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Problems solved by technology

[0004] Chinese patent CN 1868885A discloses a preparation method of nano-alumina, which is prepared by precipitation reaction of aluminum salt solution in alkaline medium. Toxic flame retardants and the preparation of new microcrystalline alumina ceramics and high-performance alumina ceramic grinding media, etc., but this method does not involve small molecule organic additives such as ether, ethylene glycol monomethyl ether, and ethylene glycol monobutyl ether.

[0005] Chinese patent CN 1168659C discloses a preparation method of activated alumina, adopts carbonization method and controls the gelling temperature, shortens the gelling time, saves cooling equipment in the production process, reduces carbon dioxide consumption, improves equipment utilization, and reduces costs , the patent does not indicate the application direction of alumina

[0009] There is no relevant report on the preparation of nano-alumina with high ink absorption performance by using aluminum isopropoxide as a raw material and using small molecule organic additives (ether, ethylene glycol monomethyl ether, ethylene glycol monobutyl ether) in the above published documents.