Anaerobic microorganism-degradable polypropylene nonwoven fabric and method for preparing the same

By constructing a multi-component synergistic degradation network using a composite filler consisting of modified chitosan, activated carbon, nano-iron oxide, modified nano-silica, and hyperbranched polysiloxane, the problem of polypropylene nonwoven fabric being difficult to degrade in the natural environment was solved, achieving stability and efficient degradation of the nonwoven fabric.

CN122446432APending Publication Date: 2026-07-24DONGYING SHENZHOU BUILDING MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGYING SHENZHOU BUILDING MATERIALS CO LTD
Filing Date
2026-05-29
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing polypropylene nonwoven fabrics are difficult to degrade in the natural environment. Traditional degradation methods are energy-intensive, costly, or pose safety risks. Furthermore, in existing anaerobic microbial degradation methods, the interfacial bonding between hydrophilic polymers and hydrophobic PP is weak, affecting spinning processability and mechanical properties.

Method used

An anaerobic degradation functional composite filler is formed by using modified chitosan, activated carbon, nano-iron oxide, modified nano-silica, and hyperbranched polysiloxane. Through in-situ composite with hyperbranched polysiloxane, a multi-component synergistic degradation network is constructed. The modified components are uniformly dispersed in the PP matrix, forming chemical bonds and physical entanglements.

Benefits of technology

It achieves good stability and processing performance of nonwoven fabric during use, and degrades rapidly and efficiently in an anaerobic environment after disposal, with a degradation rate as high as 17.4-22.1%, meeting the requirements of sanitary grade nonwoven fabric, and has good environmental benefits and industrial application prospects.

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Abstract

The application discloses an anaerobic microbial degradation polypropylene non-woven fabric and a preparation method thereof. The non-woven fabric is prepared from raw materials containing the following components: polypropylene resin, modified chitosan, activated carbon, nano-Fe3O4, modified nano-SiO2, hyperbranched polysiloxane and maleic anhydride grafted polypropylene. The modified chitosan, activated carbon, nano-Fe3O4 and modified nano-SiO2 are in-situ compounded by the hyperbranched polysiloxane to form an anaerobic degradation functional composite filler. The modified chitosan, activated carbon, nano-Fe3O4 and modified nano-SiO2 are pre-compounded by the hyperbranched polysiloxane to form the anaerobic degradation functional composite filler. The anaerobic degradation functional composite filler can be uniformly dispersed in the polypropylene resin, so that the non-woven fabric has good processability, and the prepared non-woven fabric has stable performance in the use stage and can be quickly and efficiently degraded in an anaerobic environment after being discarded.
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