JPH03180619A - Curing and greening material for slope face - Google Patents

Abstract

PURPOSE:To improve the stickiness, germination property, and water retentivity by scattering curing material consisting of starch residues mixed with carboxymethyl ether salt of starch residues on a slope face to be greened together with seeds. CONSTITUTION:A curing material is composed of 80-99.9wt.% squeeze residue of potatoes, beans, etc., from which starch is squeezed mixed with 0.1-20wt.% carboxymethylether salt of starch residues of an average ether replacement degree by carboxymethyl group of 0.1-1.0. This curing material is then scattered together with seeds on a slope face to be greened by a hydroseeder or the like. The curing material having a good stickness, germination property, and water retentivity in a wet condition can thus be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) The present invention relates to a novel slope greening curing material (hereinafter referred to as curing material) used in a slope greening method using seed spraying.

The seed spraying method, which has been practiced in Japan since around 1960, is
It is still being carried out in various places. The feature of this method is that the seeds are combined with greening materials and sown on the slope, and as they germinate and take root, a stable and strong slope is formed, and at the same time, the greening plays a role in environmental protection.

The greening materials used in the seed spraying method consist of curing material, which is the base material,
It consists of adhesive materials, water retention materials, fertilizers, etc. that play a supporting role.

For example, wood fibers, which are mainly used as a curing material in the seed spraying method, are not inherently sticky or water-retentive, so polyvinyl alcohol (PV) is used as an adhesive material.
Similar descriptions are also found in JP-A-63-55217 and JP-A-63-226411, etc., in which A), vinyl acetate emulsion, etc., and water-absorbing resins are used as water-retaining materials.

When the above additives are added to solid wood fibers, for example, tackiness can only be obtained when the sprayed material is dry (with a film formed), and water retention can only be obtained by greening. This had the disadvantage of making the inside of the material dense and losing its breathability. Furthermore, the state in which a film is formed on greening materials hardens the soil surface due to shrinkage and suppresses the germination of seeds, and conversely, in a moist state, there is a drawback that adhesiveness is not exhibited as described above.

Currently, unless conditions such as the geology of the slope and the weather are favorable, curing materials and seeds are likely to be washed away by heavy rain after construction, and conversely, failure to germinate due to dryness will occur if there is no appropriate rainfall. It will be necessary to carry out rework.

In addition, some construction methods have been implemented in which asphalt emulsion is spread after seed spraying using fibers without using adhesives or water-retaining materials. Although this method protects and strengthens the slope, it inhibits the water absorption ability of seeds and delays germination.
In the summer, the soil temperature rises too high and the seeds may wither and die, and there is a drawback that the process cannot be carried out due to drying.

The object of the present invention is to overcome the drawbacks of the prior art and provide a curing material that has both curing properties, adhesiveness, and water retention properties, and in particular, it We aim to provide a curing material that prevents seeds from flowing out and withering, is easy to work with, and is easy to install stably! B
shall be.

The present inventors have discovered that a mixture of industrial waste starch lees and carboxymethylated starch lees has not only curing properties but also adhesive and water-retaining properties as a curing material for seed spraying. We have discovered that this is a revolutionary curing material, and have achieved the present invention.

That is, the curing material of the present invention has a starch residue of 80 to 99°9.
A novel curing material characterized by being composed of 0.1 to 20% by weight of a carboxymethyl ether salt of starch meal having an average degree of ether substitution by carboxymethyl groups of 0.1 to 1.0. It is.

The starch lees used in the present invention are generally lees from which starch has been removed from potatoes (e.g. sweet potatoes, potatoes, etc.) and legumes (e.g. soybeans, corn, etc.).
The material is not limited to these, and may be, for example, konjac potato lees, citric acid lees, or bulb lees.

These are usually dry products with a moisture content of 15% or less, and are starchy and Wi1! The main component is It, with some other proteins, lipids, pectin, mannan, lignin,
Consists of etc. Further, the starch meal may be used alone or as a mixture of various starch meal items.

Next, carboxymethyl ether salts of starch meal (hereinafter referred to as
(described as CML), after adding alkali to starch meal,
It is a carboxymethyl ether salt obtained by reacting with monochloroacetic acid or an alkali salt of monochloroacetic acid to cause an etherification reaction, followed by purification with an aqueous methanol solution and drying. The average degree of ether substitution (DS) by carboxymethyl groups is from 0.1 to 1.0, preferably from 0.1 to 0.5 in use. 2 wt% water content of CML: The viscosity at 25°C at night is 5 to 2000 cP (measured using a B-type viscometer), and this viscosity value is not particularly limited in use. It may be a single product or a mixture.

Types of ether salts of CML include sodium (Na) salt, potassium (K) salt, lithium (Li) salt, calcium (Ca) salt, ammonium (NH4,) salt, etc. in the carboxymethyl group. For example, Na-CML represents carboxymethyl ether sodium salt of starch meal.The salt content of NaC1 etc. contained in CML is 10% or less, preferably 5%.
It is as follows.

As a specific production example, a molding example of Na-CML having an average degree of ether substitution by carboxymethyl groups of 0.4.25°C and a 2% aqueous solution viscosity of 600 cP is shown below. : Not limited.

Put 200g of sweet and bitter starch lees dried to a moisture content of 15% or less into a 3Z ribbon blender, and add 14% by weight of caustic soda 60%.
% methanol aqueous solution was added, and further 60% methanol aqueous solution was added.
50% monochloroacetic acid solution dissolved in methanol 96%
．． After adding 9g and etherifying at 70°C for 70 minutes, the remaining solvent was removed, washed twice with 2000cc of 75% methanol, and dried at 80°C, so that the average degree of ether substitution by carboxymethyl groups was 0.4. B type viscometer 25
Na-CML can be obtained with a 2% aqueous viscosity of 600 cP, measured at °C.

As mentioned above, the curing material of the present invention has an average degree of ether substitution by starch lees and carboxymethyl groups of 0°1 to 1.0 (
CML, preferably 0.1 to 0.5), and the blending ratio is 80 to 99.9% by weight of starch meal.
, CML 0.1-20% by weight (preferably 1-1O
weight%).

These curing materials can be obtained by arbitrarily mixing the above-mentioned two components according to the above-mentioned mixing ratio using a stirrer having a mixing function.

In addition, when using the curing material of the present invention, it is preferable that the pH of the slurry dispersed in water is adjusted within the range of 5 to 10. The slurry thus adjusted is processed by a machine such as a hydroseeder. Spread on the surface.

Standing The curing material of the present invention has adhesiveness in a wet state,
In addition, the surface of the blowing is soft, which promotes germination, and has a water-retaining ability.

This is thought to be because the starch lees and CML constituting the curing material of the present invention have water-retentive properties, and the adhesive component CML quickly dissolves in water and maintains appropriate shrinkage with the starch lees.

Therefore, the present invention solves the problem that conventional seed sprayers always lack curing properties, adhesive properties, or water retention properties.

If the curing material of the present invention is used, the germination of seeds is good, and when spraying on steep slopes of 60 degrees or more, there is no runoff due to rain, etc., and poor germination occurs due to drying. Therefore, there is no need for rework as in the conventional technology. Furthermore, by mixing the curing material of the present invention with an appropriate fertilizer, etc., the growth of plants after germination is improved and stable. A slope is obtained.

Further, the curing material of the present invention does not require the addition of a new caking agent or water-retaining material, greatly improving workability and economical efficiency.

Next, examples of the present invention will be shown, but the present invention is not limited by the examples.

In addition, the test method in Examples is as follows. Furthermore, all of the Examples and Comparative Examples were conducted on the same day.

[Germination rate] After adding water and kneading the mixture of starch meal, CM L, and seeds, N 370 CIIl x width 305 cm, depth 4
Pour into a 5mm aluminum vat (drainer type) and leave it indoors. The germination rate is the percentage of the number of germination after - weeks to the theoretical number of germination. Here, the theoretical number of germination is the number of germination when all the seeds germinated in 1.t.

The seeds used in this test are Weaving Love Grass,
The heavy season is from June to September.

[Water retention rate]

Starch meal from which seeds were removed using the same method as in the above test,
Pour a mixture of CML and water into an aluminum vat and store it outdoors (with a roof, at an outside temperature of 20°C) on a slope of 60°.
The remaining moisture content was measured one week after spraying, and the percentage of this residual moisture content to the moisture content of the curing material at the time of spraying was taken as the water retention rate.

Example 1 Sweet potato starch meal 400g (95.0% by weight),
Na-CML (raw material: sweet potato starch meal, O5O, 23
, 2.0 g of weaving love grass seeds were added to a curing material consisting of 21.1 g (5.0 wt. %) of which the viscosity of a 2 wt. Add 2400g of water and mix well. 370mm long, 305mm wide, 45m deep.
Pour into an aluminum vat, drain excess water, then stand at an angle of 60" to the horizontal surface, and stand for 27 to 3 weeks.
It was left in a room at 0°C. Thereafter, the number of germination was counted and the germination rate was determined. The results are shown in Table 1 along with the results of determining the water retention rate of the curing material after - weeks after conducting the same experiment as described above except that no seeds were added.

Example 2 Sweet potato starch cake 300g (72.7% by weight), citric acid cake 100g (24.3% by weight), Na-CML
(Raw material: sweet potato starch meal, DS 0.38.25℃
The viscosity of a 2% aqueous solution using a B-type viscometer was 130c.
P) 12.4g (3.0% by weight) of curing material,
After adding 2.0 g of weaving love grass seeds and mixing uniformly, an experiment was conducted in the same manner as in Example 1. 0 germination rate.
Table 1 shows the results of determining the water retention rate.

Example 3 Sweet potato starch meal 350g (85.7% by weight) Corn starch meal 50g (12.3% by weight), N
a-CML (raw materials: corn starch meal, O5O,5
After adding 2.0 g of weaving love grass seeds to a curing material consisting of 8.2 g (2.0 wt. %) of a 2 wt. Table 1 shows the results of the zero germination rate and water retention rate obtained through the same experiment as in Example 1.

Example 4 Sweet potato starch meal 400g (91.0% by weight), N
a-CML (raw material: sweet potato starch meal, DS 0.17
．． 2.0 g of weaving love grass seeds were added to a curing material consisting of 39.6 g (9.0 wt. %) of 2 wt. The experiment was conducted in the same manner as in Example 1.
Table 1 shows the results of germination rate and water retention rate.

Example 5 Sweet potato starch meal 400g (99.1% by weight), N
a-CML (raw materials: sweet potato starch meal, O5O, 35,
Viscosity of a 2% aqueous solution by B type viscometer at 25°C: 1
2.0 g of weaving love grass seeds were added to the curing material consisting of 3.6 g (200 cP) (0.9 fE amount%), mixed uniformly, and then an experiment was conducted in the same manner as in Example 1.
Table 1 shows the results of germination rate and water retention rate.

Comparative Example 1 Instead of the mixture of starch meal and Na-C skin in Example 1, 400 g of wood fiber with 30% water content (100 g
% by weight) and weaving lovegrass seeds 2.
0g and 2400g of water were added and thoroughly kneaded. The following experiment was conducted in the same manner as in Example 1, and the results of 0 germination rate and water retention rate are shown in Table 1.

Comparative Example 2 400 g of wood fiber with a moisture content of 30% (98
, 0% by weight) was used, and 8.2g (2.0% by weight) of commercially available vinyl acetate emulsion was added as an adhesive, and 2.0g of weaving love grass seeds were added and mixed uniformly. After that, 2400 g of water was added and thoroughly kneaded. The following experiment was conducted in the same manner as in Example 1.

Table 1 shows the results of germination rate and water retention rate.

Comparative Example 3 Instead of the mixture of starch meal and Na-CML in Example 1, 400 g of wood fiber with 30% water content (97
8.2 g (2.0 wt.%) of commercially available vinyl acetate emulsion was added as an adhesive, and 0.8 g (0.8 wt.%) of commercially available polyacrylic M If fat was added as a water-retaining material.
21! %), add 2.0 g of weaving love grass seeds, mix evenly, and add 240 g of water.
08 was added and thoroughly kneaded. Table 1 shows the results of an experiment conducted in the same manner as in Example 1 to determine the germination rate and water retention rate.

The curing material of the present invention has all of the properties of curing, adhesiveness, and water retention, and is an unprecedented product. Therefore, by using the curing material of the present invention, seeds are prevented from flowing out and withering, there is no need for rework as in the prior art, and slope covering can be completed in a short period of time.

Furthermore, since the curing material of the present invention has quick dispersibility in water, preparation work for spraying can be completed in a short time, and workability is greatly improved.

Furthermore, the present invention can greatly contribute to the reuse of resources by effectively utilizing starch meal, which is an industrial waste and has become a major problem in environmental health.

Claims (1)

[Claims] A slope greening curing material used in the seed spraying slope greening method, comprising 80 to 99.9% by weight of starch meal and an average degree of ether substitution by carboxymethyl groups of 0.1 to 1.0. A novel slope greening curing material characterized by comprising 0.1 to 20% by weight of carboxymethyl ether salts of the following types.