Dedicated material for full-biodegradation mulching film special for peanuts and preparation method thereof

Abstract

The invention discloses a dedicated material for a full-biodegradation mulching film special for peanuts. The dedicated material is characterized by being prepared from the following ingredients in parts by weight: 100 parts of PLA, 70 to 90 parts of PBAT, 0.5 to 1.0 part of nucleating agent, 5 to 10 parts of compound anti-hydrolysis agent, 0.5 to 1.5 parts of compound anti-ultraviolet agent, 3 to6 parts of molecular weight modifier and 20 to 30 parts of flexibility modifier. The mulching film prepared from the dedicated material disclosed by the invention has the advantages of excellent anti-hydrolysis performance, excellent light aging resistance, good flexibility performance, good mulching film anti-blocking property (saving mulching film laying time) and high light transmittance. Under the composting condition, the dedicated material can be completely and biologically degraded into carbon dioxide and water; thus, pollution to soil and environment is avoided, and the dedicated material is suitable for being utilized as peanut mulching films.

Description

technical field [0001] The invention belongs to the technical field of ground covering films, and in particular relates to a special material for fully biodegradable plastic film for peanuts and a preparation method thereof. Background technique [0002] At present, mulch film has been widely used in the agricultural fields of various countries, and has attracted much attention for its unique functions of heat preservation, moisture retention, moisture conservation, fertilizer increase, and production increase; in my country, the annual use of mulch film exceeds 1 million tons. The materials are basically traditional petroleum-based materials such as PE, which will be left in the soil after use and discarded, causing serious white pollution; peanut planting is very common in my country and has great development prospects; bio-polyester materials such as polyacrylonitrile Polyethylene carbonate (PPC), polylactic acid (PLA), polybutylene terephthalate-adipate (PBAT), as new biod...

AI Technical Summary

Problems solved by technology

According to the patent analysis, there are few degradable mulch films dedicated to peanut covering, and the peanut degradable mulch film needs to meet the following characteristics: (1) Since the mulch film needs to be exposed to high-temperature ultraviolet radiation in summer, special ultraviolet rays and light stabilizers need to be added; (2) The summer rain is relatively heavy. However, biodegradable materials are prone to hydrolysis, and a single anti-hydrolysis agent is difficult to meet the requirements