Chitosan-based water-absorbing microsphere as well as preparation method and application thereof
By using chitosan, polyglutamic acid, and hydroxypropyl cellulose as raw materials, water-absorbing microspheres with an interpenetrating network structure were prepared, solving the environmental pollution and salt and acid/alkali resistance problems of existing materials. This achieved high water absorption and recyclability, making it suitable for improving the soil environment.
CN120919925APending Publication Date: 2025-11-11QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
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Patent Information
- Application Number
- CN202511381451.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2025-11-11
AI Technical Summary
Technical Problem
Existing superabsorbent materials have poor biodegradability, pollute the environment, have poor resistance to salt, acid and alkali, and have a limited number of recycling cycles.
Method used
Water-absorbing microspheres were prepared by reverse emulsion polymerization using chitosan, polyglutamic acid, and hydroxypropyl cellulose as raw materials. This process formed a rigid-flexible interpenetrating network structure, which enhanced the material's resistance to salt, acids, and alkalis, as well as its recyclability.
Benefits of technology
The prepared water-absorbing microspheres exhibit good water absorption in salt and acid/alkali solutions, possess a certain degree of recyclability, are suitable for complex soil environments, and reduce agricultural application costs.
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Abstract
The invention discloses a chitosan-based water-absorbing microsphere as well as a preparation method and application thereof, and belongs to the technical field of macromolecular water-absorbing microspheres. The preparation method comprises the following steps: (1) adding an emulsifier into an organic solvent, stirring and dissolving uniformly to obtain an oil phase solution; and (2) mixing a chitosan aqueous solution, a polyglutamic acid aqueous solution and a hydroxy propyl cellulose aqueous solution, adding the mixture into the oil phase solution, uniformly stirring and mixing, then adding concentrated hydrochloric acid and a cross-linking agent to carry out polymerization reaction, and after the reaction is finished, washing, centrifugally separating and drying to obtain the chitosan-based water-absorbing microspheres. The gel water-absorbing microspheres taking chitosan, hydroxy propyl cellulose and polyglutamic acid as matrixes are prepared for the first time through an inverse emulsion polymerization method, are environment-friendly, have good water absorption in a salt solution and an acidic and alkaline solution, have certain recyclability, are beneficial to improving soil conditions and promoting crop growth, and can be used as a water-absorbing material for the first time. The maximum water holding capacity and the water retention capacity of the soil can be improved.
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