Full-degradation deworming mulching film and preparation method thereof

Abstract

The invention relates to a full-degradation deworming mulching film and a preparation method thereof. The full-degradation deworming mulching film comprises as follows in parts by mass: PBAT 30-60%, polylactic acid 10-30%, starch 10-30%, plasticizer 5-10%, chain extender 0-2%, filler 5-10%, plant source pesticide-sustained-release microcapsule 5-20% and full-degradation color master batch 0-5%. The preparation method comprises the steps of firstly absorbing plant source pesticide on diatomaceous earth, then processing with polyvinyl alcohol according to specific technology to obtain the plant source pesticide-sustained-release microcapsule, and then manufacturing materials for the full-degradation deworming mulching film with the PBAT, starch, polylactic acid, plasticizer, chain extender and the filler according to a specific production technology. The biological full-degradation mulching film has deworming effect, has important significance on crop pesticide residue reduction and environment protection, and meets the requirement of sustainable development.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a fully degradable insect-repelling mulch film and a preparation method thereof. Background technique [0002] Plastic film is one of the important means of production in agricultural production. It can not only improve ground temperature, water conservation, soil conservation, fertilizer conservation and fertilizer efficiency, but also can kill weeds, prevent diseases and insect pests, prevent drought and waterlogging, suppress salt and protect seedlings, and improve near-ground light. thermal conditions, make the product hygienic and clean and many other functions. [0003] As a large agricultural country, my country has a vast territory and great climate differences across regions. Therefore, the application and development of mulch film has been very rapid in the past 30 years. It is the country with the largest consumption of mulch film, the largest cov...

AI Technical Summary

Problems solved by technology

[0004] While plastic film mulching technology has brought huge benefits to my country's agricultural production increase, it has also brought serious pollution to the soil, and there is a potential danger of white pollution.

Since most of the mulch films currently used are polyethylene or polyvinyl chloride mulch films, the stability of this type of mulch film is extremely high, and the fragments left in the soil cannot be degraded by soil microorganisms, nor can they be absorbed and utilized by crops.

A large number of plastic film residues have brought serious negative impacts on the ecological environment of farmland and agricultural production, causing a series of problems such as soil structure damage, arable land quality decline, crop production reduction, agricultural operation obstruction, and secondary environmental pollution.

[0005] In addition, during the growth of crops, it is inevitable that they will be infested by insect pests, resulting in a decline in harvest.

In order to reduce the impact of insect pests on crops, people often use seeds soaked in pesticides before planting or spray pesticides multiple times during the growth period of crops to achieve the purpose of deworming and killing insects. A lot of manpower and material resources are wasted and a lot of pesticides will remain on the surface of the crops or in the fruits, which poses a great threat and harm to human health.

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