CN1445275A

CN1445275A - Preparation of polyvinyl alochol modifier-liquid ecological mulchine film

Info

Publication number: CN1445275A
Application number: CN 02108889
Authority: CN
Inventors: 王建红
Original assignee: INST OF SOIL AND FERTILIZER ZHEJIANG PROVINCE AGRICULTURAL SCIENTIFIC ACADEMY
Current assignee: INST OF SOIL AND FERTILIZER ZHEJIANG PROVINCE AGRICULTURAL SCIENTIFIC ACADEMY
Priority date: 2002-04-22
Filing date: 2002-04-22
Publication date: 2003-10-01
Anticipated expiration: 2022-04-22
Also published as: CN1178984C

Abstract

A process for preparing the ecological liquid ground film, which is the modified polyvinyl alcohol and can be sprayed on the ground surface to become ground film, includes such steps as proportionally mixing water, polyvinyl alcohol, carboxy methyl cellulose and vinyl acetate, heating to 70-80 deg.C while stirring, proportionally adding potassium persulfate, emulsifier OP, propanediol and glutaraldehyde, reaction while stirring, and filtering. Its advantages are natural degradation, no secondary pollution, low cost and wide application.

Description

The preparation of polyvinyl alochol modifier-liquid ecological mulchine film

Technical field

But the preparation of the liquid mixture of form mulching after the present invention relates to spray, but the preparation of the liquid mixture of form mulching after particularly prepared in reaction is sprayed in the presence of water with polyvinyl alcohol, carboxymethyl cellulose and ethyl acetate.

Background technology

Data shows according to the relevent statistics, and China desert, Gobi desert and the desertification land total area are 168.9 ten thousand square kilometres, account for 17.6% of area, and the whole nation nearly has that 1/3rd area just is being subjected to hazards of sand storms.Since the nineties, China's sandy land area is with the speed expanded in 2460 square kilometres of every year.By 1999, " engineering prevents and controls desertification " that China serves as theme with three Norths dust storm band administered 6.44 ten thousand kilometers in desert altogether, but still is in the state of " sand advances the people and moves back ".According to satellite remote sensing technique for investigation statistics, the whole nation can utilize the grassland quickening degeneration with annual 2% speed.Desertification has brought direct harm to people's life with existence, and big and medium-sized cities, industrial and mineral and national defense facility are caused serious threat.It is extremely urgent to we can say that China prevents and treats the work of Desertification.

Liquid ground film is that relative solid mulch film is commonly called as by agreement.Liquid ground film itself is a kind of liquid, and the spray smile can the very thin one deck cured film of fixed formation after face of land dehydration, and is water insoluble under this film normal temperature, has the soil moisture conservation of heating, water conservation, conserves water and soil, increases the soil aggregate effects such as physical behavior of improving the soil.The later stage nineties in last century, the domestic liquid ground film that begins one's study, wherein the most representative with the liquid ground film of the Chinese Academy of Agricultural Sciences and China's Petroleum Industry main office joint research and development.Also have application number 98107594, notification number 1232857, the Chinese invention patent in November 7 calendar year 2001 Granted publication day, also disclosed a kind of liquid ground film and preparation method thereof.These liquid ground films are made has a large amount of pitches in raw materials used, causes secondary pollution after causing this liquid ground film to use, and its cost height, thereby is difficult to promote.

Technical problem to be solved by this invention provides after a kind of spray the preparation of polyvinyl alochol modifier-liquid ecological mulchine film that can form mulching, this ecological fluid soil conditioner is used for agriculture production, dune-fixating forestation, planting trees and grass, conserves water and soil, improvement is administered in the saltings, the crop seasonal drought is early sent out, alleviated to road bank protection, promotion crop, have good action, and its cost is lower.

For solving the problems of the technologies described above, its special character of technical scheme that the preparation of polyvinyl alochol modifier-liquid ecological mulchine film of the present invention is adopted is to adopt step:

1. in first reactor, add 2～4 parts of 100 parts of entry, 3～6 parts of polyvinyl alcohol, 1～3 part of carboxymethyl cellulose and vinyl acetates by weight, be heated to 70～80 ℃ and stir;

2. the compound after the described stirring is added second reactor, and in wherein adding 0.05～0.1 part of 0.1～0.3 part of Potassium Persulphate, 0.3～1.0 part of OP emulsifying agent, 1～2 part of propylene glycol and glutaraldehyde, stirring reaction by weight;

3. described reacting rear material is filtered, getting emulsion is described polyvinyl alochol modifier-liquid ecological mulchine film.

Described reacting rear material filters the gained emulsion basin of packing into, and cooling back packing gets the finished product polyvinyl alochol modifier-liquid ecological mulchine film.

Ecological fluid soil conditioner normal temperature of the present invention is colourless liquid down, construction ground is diluted to finite concentration with a large amount of cold water at the scene, through manually or with mechanical spraying equipment spraying in the face of land, can form one deck cured film on the face of land after half an hour, this film is water insoluble at normal temperatures, has fixing soil table, promotes soil aggregate to form, reduce functions such as soil water evaporation, increase table soil temperature degree.

Ecological fluid soil conditioner of the present invention is indicated as the nontoxicity product through animal toxicity test, and plant, animal, human body are had no side effect, and environment is not had any harm yet.

Liquid ground film of the present invention is the long-chain oxy-compound, and degraded back becomes carbohydrate, and it is residual not have any nuisance, does not also exist to resemble to use solid plastic film and cause " white pollution " problem.

Liquid ground film of the present invention can be widely used in agriculture production, dune-fixating forestation, planting trees and grass, conserves water and soil, improvement is administered in the saltings, crop seasonal drought etc. is early sent out, alleviated to road bank protection, promotion crop.Be mainly used in northern China and check winds and fix drifting sand and reduce soil water evaporation, to improving the greening and afforestation surviving rate and suppressing face of land sand, prevent the unusual effect that has of sandstorm, show by the test of planting trees at the sand ground of Duolun County, the Inner Mongol, this mulch film and a kind of water-holding agent are used, survival rate of planting in desert is reached more than 90%, be subjected to the attention of local government.This mulch film is mainly used in the increase soil temperature at China's southern area, reduce soil water evaporation, prevent face of land soil erosion and suppress the soil accumulation of salt in the surface soil etc., also can be used for rabi and grow seedlings, alleviate the summer crop seasonal drought, prevent loss of soil nutrient, suppress the tidal land ground and the plastic shed soil accumulation of salt in the surface soil etc.Test shows, spraying can increase soil temperature behind this mulch film, reduces soil water evaporation rate etc., to having prevented erosion certain effect; In addition, this mulch film sprays directly rupture of membranes and going out of face of land ensuing crop seed, need not artificial rupture of membrane.

Mulch film of the present invention also has easy to use, the characteristics that cost is low.During use behind the dilute with water available artificial, machinery or vertisplane spray.About 60～75 yuan/mu of this mulch film cost, approaching with solid mulch film cost, be easy to be accepted by market.

Embodiment

Embodiment 1:

1. in first reactor, add 2 parts of 100 parts of entry, 3 parts of polyvinyl alcohol, 1 part of carboxymethyl cellulose and vinyl acetates by weight, be heated to 70 ℃ and stir;

2. the compound after the described stirring is added second reactor, and in wherein adding 0.05 part of 0.1 part of Potassium Persulphate, 0.5 part of OP emulsifying agent, 1 part of propylene glycol and glutaraldehyde, stirring reaction 3 hours by weight;

3. will flow into the emulsion basin, cooling back packing behind the described reacting rear material process filter.

Embodiment 2:

1. in first reactor, add 3 parts of 100 parts of entry, 5 parts of polyvinyl alcohol, 2 parts of carboxymethyl celluloses and vinyl acetates by weight, be heated to 75 ℃ and stir;

2. the compound after the described stirring is added second reactor, and in wherein adding 0.1 part of 0.2 part of Potassium Persulphate, 0.7 part of OP emulsifying agent, 1.5 parts of propylene glycol and glutaraldehyde, stirring reaction 3 hours by weight;

Embodiment 3:

1. in first reactor, add 4 parts of 100 parts of entry, 6 parts of polyvinyl alcohol, 3 parts of carboxymethyl celluloses and vinyl acetates by weight, be heated to 80 ℃ and stir;

2. the compound after the described stirring is added second reactor, and in wherein adding 0.1 part of 0.3 part of Potassium Persulphate, 1 part of OP emulsifying agent, 2 parts of propylene glycol and glutaraldehyde, stirring reaction 2.5 hours by weight;

Claims

1, the preparation of polyvinyl alochol modifier-liquid ecological mulchine film is characterized in that adopting step:

2, the preparation of polyvinyl alochol modifier-liquid ecological mulchine film as claimed in claim 1 is characterized in that described reacting rear material filters the gained emulsion basin of packing into, and cooling back packing gets the finished product polyvinyl alochol modifier-liquid ecological mulchine film.