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Water-collecting degradable mulching film and preparation method thereof

A technology for degrading plastic film and water collection, applied in the fields of botanical equipment and methods, plant protection, application, etc., can solve the problems of poor moisture retention of the degradable plastic film, unsuitable for application in arid and semi-arid areas, etc., to achieve cheap raw materials, improve use efficiency and The effect of stability and simple preparation process

Active Publication Date: 2019-12-31
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The inventor found that the existing degradable mulch film has poor moisture retention and is not suitable for application in arid and semi-arid areas. However, it is precisely the arid and semi-arid areas where mulch is most widely used and where crops most need mulching.

Method used

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  • Water-collecting degradable mulching film and preparation method thereof
  • Water-collecting degradable mulching film and preparation method thereof
  • Water-collecting degradable mulching film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The water-collecting and degradable plastic film is composed of the following components by mass:

[0047]

[0048] Wherein, the mixing ratio of DBS / BPO mixture is DBS:BPO=4:7;

[0049] 1# water-collecting agent is surface-modified mica powder with a particle size of 15 μm, prepared according to the following steps:

[0050] S1: Mix sodium silicate, polyacrylamide, hexamethylenetetramine, ethyl acetate, aluminum phosphate and polyoxyethylene ether in a weight ratio of 55:10:18:12:1.5:8.5 to prepare a surface Modifier;

[0051] S2: In a stirring state, spray the surface modifier obtained in S1 onto the surface of the hydrophilic powder filler to obtain a spray powder; wherein, the spraying amount of the surface modifier is 1.5% of the mass of the hydrophilic powder filler;

[0052] S3: Stir and dry the spray powder obtained in S2 at 40°C until it is fluffy and not agglomerated to obtain a fluffy powder;

[0053]S4: The fluffy powder obtained in S3 was heated and re...

Embodiment 2

[0060] The water-collecting and degradable plastic film is composed of the following components by mass:

[0061]

[0062] Wherein, the mixing ratio of the PBAT / PBS mixture is PBAT:PBS=8:2; the mixing ratio of the P-M-DBS / DCP mixture is P-M-DBS:DCP=1:2.

[0063] 2# water-collecting agent is surface-modified talcum powder with a particle size of 10 μm, which is prepared according to the following steps:

[0064] S1: Mix sodium silicate, polyacrylamide, hexamethylenetetramine, ethyl acetate, aluminum phosphate and polyoxyethylene ether in a weight ratio of 51:11:16:9:1.2:9 to prepare a surface Modifier;

[0065] S2: In a stirring state, spray the surface modifier obtained in S1 onto the surface of the hydrophilic powder filler to obtain a spray powder; wherein, the spraying amount of the surface modifier is 1% of the mass of the hydrophilic powder filler;

[0066] S3: Stir and dry the spray powder obtained in S2 at 30°C until it is fluffy and not agglomerated to obtain a fl...

Embodiment 3

[0074] The water-collecting and degradable plastic film is composed of the following components by mass:

[0075]

[0076] Wherein, the mixing ratio of PBAT / PLA mixture is PBAT:PLA=7:3; the mixing ratio of P-Cl-DBS / DTBP mixture is P-Cl-DBS:DTBP mixture=3:5.

[0077] 3# water-collecting agent is surface-modified glass microspheres with a particle size of 25 μm, prepared according to the following steps:

[0078] S1: Mix sodium silicate, polyacrylamide, hexamethylenetetramine, ethyl acetate, aluminum phosphate and polyoxyethylene ether in a weight ratio of 53:10:17:10:1.5:7.5 to prepare a surface Modifier;

[0079] S2: In a stirring state, spray the surface modifier obtained in S1 onto the surface of the hydrophilic powder filler to obtain a spray powder; wherein, the spraying amount of the surface modifier is 0.5% of the mass of the hydrophilic powder filler;

[0080] S3: Stir and dry the spray powder obtained in S2 at 30°C until it is fluffy and not agglomerated to obtain...

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Abstract

The invention discloses a water-collecting degradable mulching film, which comprises the following raw materials by weight: 100 parts of a degradable polymer, 0.5-3.5 parts of a hydrophobic agent, 2-5parts of a water-collecting agent and 0.5-2 parts of a tear-resistant agent. The mulching film contains the water-collecting agent and the hydrophobic agent simultaneously, the surface of the water-collecting agent is super-hydrophilic, can adsorb mist in the air and convert the mist into small liquid drops, and meanwhile, under the cooperation of the hydrophobic agent, the liquid drops cannot spread and stay at positions except the water-collecting agent, only can continuously enlarge in a spherical shape around the water-collecting agent, and then roll into soil under the action of gravity,thus realizing soil irrigation. Meanwhile, the water-collecting degradable mulching film provided by the invention has the characteristics of cheap raw materials and simple preparation process, and has great application value.

Description

technical field [0001] The invention relates to the technical field of biodegradable plastic film. More specifically, it relates to a water-collecting and degradable mulch film and a preparation method thereof. Background technique [0002] Mulch film is widely used in my country's agricultural production. It has the functions of increasing temperature and keeping moisture, resisting drought and saving water, improving fertility, and suppressing weeds. It has become an important support for increasing agricultural production in our country. However, the traditional plastic film cannot be degraded, and it is easy to remain in the soil to cause "white pollution". The promotion of degradable mulch film is an important new trend to solve the problem of mulch film residue. It not only gives full play to the covering effect of mulch film, but also degrades itself, which can be described as the best of both worlds. In my country, bounded by Daxing'an Mountains-Yinshan Mountain-He...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L83/04C08K13/06C08K9/10C08K3/34C08K5/1565C08K5/14C08K7/20C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2367/02C08J2467/04C08J2483/04C08K3/34C08K5/14C08K5/1565C08K7/20C08K9/10C08K13/06
Inventor 甄志超季嘉铭季君晖王格侠黄丹王萍丽卢波任中来
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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