Bamboo fiber degradable mulching film and preparation method thereof

By employing technologies such as bamboo fiber composite modified starch, a high-strength biodegradable mulch film is prepared, solving the problem of difficult degradation of mulch films in existing technologies. This ensures the integrity of the mulch film throughout its growth cycle and meets the requirements for mechanized laying. It also solves the problems of soil residue pollution and microplastics associated with existing mulch films, achieving soil residue pollution control and mechanized laying throughout the mulch film's growth cycle.

CN120904539AInactive Publication Date: 2025-11-07FUJIAN MANSHANHONG NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202511448643.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-11
Publication Date
2025-11-07
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Traditional polyethylene mulch films are difficult to degrade, leading to the accumulation of residual film in the soil. Existing biodegradable mulch films have poor mechanical properties, uncontrollable degradation rates, and pose environmental risks. Current processes have failed to effectively solve the problem of uneven fiber dispersion, resulting in poor stability of the membrane structure.

Method used

Using all-natural materials such as bamboo fiber, composite modified starch, and chitosan, a high-strength, controllable degradable mulch film is prepared by enhancing interfacial adhesion through a nano-silica-chitosan composite coating, forming a stable network structure with lignin-maleic anhydride graft copolymer, combined with organic modified montmorillonite and Bacillus subtilis degradation promoter, and ultraviolet crosslinking technology.

Benefits of technology

It achieves the integrity of the mulch film throughout its growth cycle and meets the requirements for mechanized laying. After degradation, it leaves no harmful residues, improves soil structure, enhances water use efficiency, reduces soil-borne diseases, meets clean production standards, and reduces raw material costs.

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Abstract

The invention discloses a bamboo fiber degradable mulching film and a preparation method thereof, and belongs to the technical field of agricultural environment-friendly materials. The mulching film is prepared from bamboo fibers loaded with a nano silicon dioxide-chitosan composite coating on the surface, acetate-sodium alginate composite modified starch, a lignin-maleic anhydride grafted copolymer cross-linking agent, a bacillus subtilis degradation accelerant and the like. The preparation method comprises the steps of bamboo fiber pretreatment, composite modified starch preparation, graft copolymer synthesis, melt extrusion granulation, film casting, ultraviolet crosslinking and the like. According to the invention, the bamboo fibers are modified by innovatively adopting the nano silicon dioxide-chitosan composite coating, so that the interfacial compatibility and the antibacterial performance are improved; the film-forming property and the air permeability of the matrix are optimized through the acetate-sodium alginate composite modified starch; a lignin-maleic anhydride grafted copolymer is used for replacing a traditional cross-linking agent, and synergy of mechanical enhancement and controllable degradation is achieved.
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