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Method for preparing chitosan/organo montmorillonite nanometer composite material

A nano-composite material, organic montmorillonite technology, applied in chemical instruments and methods, other chemical processes, etc., to achieve the effect of improving utilization and improving economic benefits

Inactive Publication Date: 2009-09-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is to improve the utilization rate of chitosan, reduce the intercalation reaction time, and the material is easy to recycle after being used as an adsorbent, without secondary pollution

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  • Method for preparing chitosan/organo montmorillonite nanometer composite material
  • Method for preparing chitosan/organo montmorillonite nanometer composite material

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Embodiment Construction

[0022] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0023] Purification of Montmorillonite:

[0024] Prepare the montmorillonite into a 7% (w / w) suspension, stir it electrically for 15 minutes, let it stand for 10 minutes, pour out the upper liquid, discard the sand at the bottom, and add a certain amount of water to make the mass fraction of the montmorillonite approx. 5%, stir for 20 minutes, let stand for 20 minutes, discard the sand at the bottom, evaporate the above liquid to dryness at 95°C, and grind through a 100-mesh sieve.

[0025] Organicization of Montmorillonite:

[0026] Weigh a certain amount of purified montmorillonite, add deionized water to prepare a suspension with a mass concentration of 8%, measure 100ml into a 250ml Erlenmeyer flask, and stir for 30min in a water bath at 60°C. Dissolve 2.4g of cetyltrimethylammonium bromide in 50ml of deionize...

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Abstract

The invention relates to a method for preparing a chitosan / organo montmorillonite nanometer composite material, belonging to the technical field of new technologies and new materials. The method comprises the following steps: organo montmorillonite is added according to a certain proportion to a chitosan solution with a mass percentage of 0.05 percent to 0.4 percent and a pH value of 4.5 to 5.5; the organo montmorillonite and the chitosan solution are stirred and react at 50 DEG C to 60 DEG C for 10 hours to 16 hours; the reacted solution is evaporated under a water-bath condition of 80 DEG C to 95 DEG C until no obvious liquid exists; the obtained solid is deuibuzed, dispersed, filtered and washed to be neutral; and the obtained solid is dried, ground and screened at 80 DEG C to 95 DEG C so as to obtain the chitosan / organo montmorillonite nanometer composite material. The invention has the advantages of little water consumption and wild reaction condition, and the prepared chitosan / organo montmorillonite nanometer composite material is easy to recycle after being used as an adsorbent, has no secondary pollution, is beneficial to environmental protection and can be applied in fields, such as water treatment, preservatives, antibacterial agents, and the like.

Description

technical field [0001] The invention belongs to the technical field of new technology and new material, and relates to a method for preparing chitosan / organic montmorillonite nanocomposite material by combining impregnation and evaporation. Background technique [0002] Chitosan is a natural polymer polysaccharide obtained after deacetylation of chitin. It is non-biologically toxic and degradable. It is an excellent adsorbent, mainly used to adsorb heavy metals, transition metals, dyes, etc. The main mechanism There are -NH in its molecular structure that can react with these substances 3 + and -OH. In addition, chitosan also has good flocculation, complexation, film-forming and other properties, and is widely used in food, environmental protection, purification of traditional Chinese medicine, papermaking and other fields. There are also studies on chitosan as an antibacterial agent and inhibition of nitrite formation. However, due to the limitations of the physical pro...

Claims

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Application Information

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IPC IPC(8): B01J20/30C08J3/20C08L5/02C08K9/04C08K3/34
Inventor 张爱丽周集体黄育刚
Owner DALIAN UNIV OF TECH
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