阅读说明：本技术 纳米复合浆料的制备方法 (Preparation method of nano composite slurry ) 是由 吴瑛 吴春金 于 2020-04-17 设计创作，主要内容包括：本发明涉及一种纳米复合浆料的制备方法,属于纳米浆料技术领域,解决了制备稳定的功能性纳米复合浆料的问题,本发明由以下步骤组成,S1电气石前处理,S2电气石粉体浆料制备：将前处理好的电气石粉体与分散剂和去离子水按照比例1：0.003-0.01：5-50混合均匀并调节pH值≥7.5,加入研磨介质进行粉碎,得到电气石粉体浆料,所述的研磨介质平均粒径为0.1mm-0.4mm,所述的研磨介质与电气石粉体质量比为4-20：1,S3纳米复合浆料制备,最终得到平均粒度小于50nm的纳米复合浆料。本发明提供的纳米复合浆料的稳定性优良,工艺简便,易于操作,分散效果好,可以大规模广泛应用,在增加涂料的负离子释放值、抑菌防霉等作用基础上,还可以以及可以用于纺织等领域。(The invention relates to a preparation method of nano composite pulp, belonging to the technical field of nano pulp and solving the problem of preparing stable functional nano composite pulp, the invention comprises the following steps of S1 tourmaline pretreatment and S2 tourmaline powder pulp preparation: mixing the pretreated tourmaline powder with a dispersing agent and deionized water according to the proportion of 1: 0.003-0.01: 5-50, uniformly mixing, adjusting the pH value to be more than or equal to 7.5, adding a grinding medium, and crushing to obtain tourmaline powder slurry, wherein the average particle size of the grinding medium is 0.1-0.4 mm, and the mass ratio of the grinding medium to the tourmaline powder is (4-20): 1, S3 nano composite slurry preparation, and finally obtaining the nano composite slurry with the average particle size of less than 50 nm. The nano composite slurry provided by the invention has the advantages of excellent stability, simple and convenient process, easy operation and good dispersion effect, can be widely applied in a large scale, and can be used in the fields of textile and the like on the basis of increasing the negative ion release value, bacteriostasis, mildew prevention and the like of the coating.)

1. A method for preparing nano composite slurry is characterized in that: the method comprises the following steps of (1),

s1 tourmaline pretreatment: after the raw material of the tourmaline is pretreated, the raw material is crushed by a dry method, passes through a 230-sand 425-mesh sieve, is repeatedly cleaned to obtain tourmaline powder,

s2 preparation of tourmaline powder slurry: mixing the pretreated tourmaline powder with a dispersing agent and deionized water according to the proportion of 1: 0.003-0.01: 5-50, uniformly mixing, adjusting the pH value to be more than or equal to 7.5, adding a grinding medium, and crushing to obtain tourmaline powder slurry, wherein the average particle size of the grinding medium is 0.1-0.4 mm, and the mass ratio of the grinding medium to the tourmaline powder is (4-20): 1,

preparation of S3 nano composite slurry: adding the nano tourmaline powder carrier aqueous solution into the tourmaline powder slurry, continuously crushing until the crushing is finished, and removing the precipitate after the crushing is finished to obtain the nano composite slurry with the average grain diameter less than 50 nm.

2. The method for preparing a nanocomposite paste according to claim 1, characterized in that: in the step S3, the ratio of the tourmaline powder slurry to the nano tourmaline powder carrier aqueous solution is 1: 0.01-1.

3. The method for preparing a nanocomposite paste according to claim 1, characterized in that: in the step S3, the nano tourmaline powder carrier includes nano cellulose, the length-diameter ratio of the nano cellulose is not less than 100, and the diameter is 5-100 nm.

4. The method for preparing a nanocomposite paste according to claim 1, characterized in that: in the step S2, the pulverization is to put the mixture of the pretreated tourmaline powder, the dispersant and the deionized water into a nano grinding device, and add a grinding medium into the nano grinding device for pulverization, wherein the rotation speed of the nano grinding device is 1000-2500 rpm, and the grinding time is 4-6 h.

5. The method for preparing nanocomposite paste according to claim 2, characterized in that: in the step S3, the nano tourmaline powder carrier further includes a natural polymer and a cellulose derivative, the natural polymer includes one or more of gelatin, alginate jelly and collagen, the cellulose derivative includes one or more of carboxymethyl cellulose, ethyl cellulose, hydroxypropyl cellulose and hydroxypropyl methyl cellulose, and the ratio of the nano cellulose, the natural polymer and the cellulose derivative in the mineral powder nano carrier is 10: 1-2: 2-3.

6. The method for preparing a nanocomposite paste according to claim 5, characterized in that: the preparation method of the nano tourmaline powder carrier water solution comprises the following steps of fully dissolving natural polymers and cellulose derivatives in deionized water, adding nano cellulose, and uniformly mixing to obtain the nano tourmaline powder carrier water solution.

7. The method for preparing a nanocomposite paste according to claim 1, characterized in that: in the step S1, the tourmaline raw material is pretreated by removing surface impurities from the tourmaline raw material, adding an anionic sodium polycarboxylate dispersant after removing the surface impurities, wherein the mass ratio of the anionic sodium polycarboxylate dispersant to the tourmaline raw material is 0.6-1.2: 1.

8. the method for preparing a nanocomposite paste according to claim 1, characterized in that: in the step S1, the dry grinding includes primary grinding and secondary grinding, an anionic sodium polycarboxylate dispersant is added after the primary grinding and before the secondary grinding, and the mass ratio of the anionic sodium polycarboxylate dispersant to the tourmaline raw material is 1-1.5: 1.

9. the method for preparing a nanocomposite paste according to claim 1, characterized in that: in the step S2, the dispersing agent is a pyridinium salt, and the ratio of the tourmaline powder to the pyridinium salt and deionized water is 1: 0.003-0.005: 20-50.

10. The method of preparing a nanocomposite paste according to claim 9, characterized in that: the preparation method of the mixture of the tourmaline powder, the pyridinium salt and the deionized water comprises the following steps of fully mixing the tourmaline powder and the deionized water, adjusting the pH value to 8-10, and finally adding the pyridinium salt and fully mixing.

Technical Field

The invention belongs to the technical field of nano-slurry, and relates to a preparation method of nano-composite slurry.

Background

Tourmaline is a unique self-generating polar mineral, has piezoelectric effect and pyroelectric effect, can emit far infrared rays and induce negative ions, and is widely applied to the fields of fillers, pigments, sealing materials, electrical functionality, adsorbing materials, air purifying materials, building materials and the like. The tourmaline superfine powder has special superfine effect, but has serious agglomeration phenomenon. Chinese invention patent [ application No.: CN201110208511.9 discloses an inorganic nano tourmaline powder aqueous slurry composition and its preparation method, which comprises charging distilled water, aqueous wetting dispersant silik-7110, triethanolamine, and dimethylethanolamine into a reaction vessel, gradually adding inorganic nano tourmaline negative ion powder under high speed dispersion condition to obtain slurry, and grinding and dispersing the slurry in a three-roll machine. The prepared water-based slurry has good dispersibility and no color change, and can be stored for 30 days at the temperature of 50 ℃. However, the invention directly utilizes the inorganic nano tourmaline negative ion powder with the grain size range less than 50nm, namely the tourmaline superfine powder with serious agglomeration phenomenon is utilized to prepare the water-based slurry, the cost is higher and the stability is difficult to adapt to practical production application.

Therefore, how to prepare stable functional nano composite slurry becomes a problem which needs to be solved urgently.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for producing a nanocomposite paste.

In order to achieve the purpose, the invention adopts the following technical scheme: a preparation method of nano composite slurry comprises the following steps,

s1 tourmaline pretreatment: after the raw material of the tourmaline is pretreated, the raw material is crushed by a dry method, passes through a 230-sand 425-mesh sieve and is repeatedly cleaned to obtain tourmaline powder, and S2 tourmaline powder slurry is prepared: mixing the pretreated tourmaline powder with a dispersing agent and deionized water according to the proportion of 1: 0.003-0.01: 5-50, uniformly mixing, adjusting the pH value to be more than or equal to 7.5, adding a grinding medium, and crushing to obtain tourmaline powder slurry, wherein the average particle size of the grinding medium is 0.1-0.4 mm, and the mass ratio of the grinding medium to the tourmaline powder is (4-20): 1,

preparation of S3 nano composite slurry: adding the nano tourmaline powder carrier aqueous solution into the tourmaline powder slurry, continuously crushing until the crushing is finished, and removing the precipitate after the crushing is finished to obtain the nano composite slurry with the average grain diameter less than 50 nm.

In the above method for preparing a nano composite slurry, in step S3, the ratio of the tourmaline powder slurry to the nano tourmaline powder carrier aqueous solution is 1: 0.01-1.

In the above preparation method of the nano composite slurry, in the step S3, the nano tourmaline powder carrier includes nano cellulose, and the length-diameter ratio of the nano cellulose is not less than 100, and the diameter is 5-100 nm.

In the above preparation method of the nano composite slurry, in the step S2, the pulverization is to put the mixture of the pretreated tourmaline powder, the dispersant and the deionized water into a nano grinding device, and add the grinding medium into the nano grinding device for pulverization, wherein the rotation speed of the nano grinding device is 1000-2500 rpm, and the grinding time is 4-6 h.

In the preparation method of the nano composite slurry, in step S3, the nano tourmaline powder carrier further includes a natural polymer and a cellulose derivative, the natural polymer includes one or more of gelatin, alginate jelly and collagen, the cellulose derivative includes one or more of carboxymethyl cellulose, ethyl cellulose, hydroxypropyl cellulose and hydroxypropyl methyl cellulose, and a ratio of the nano cellulose, the natural polymer and the cellulose derivative in the mineral powder nano carrier is 10: 1-2: 2-3.

In the preparation method of the nano composite slurry, the preparation method of the nano tourmaline powder carrier aqueous solution comprises the following steps of firstly, fully dissolving natural polymers and cellulose derivatives in deionized water, then adding nano cellulose, and uniformly mixing to obtain the nano tourmaline powder carrier aqueous solution.

In the above method for preparing a nanocomposite paste, in step S1, the tourmaline raw material is pretreated by first removing surface impurities from the tourmaline raw material, and then adding an anionic sodium polycarboxylate dispersant to the tourmaline raw material, wherein the mass ratio of the anionic sodium polycarboxylate dispersant to the tourmaline raw material is 0.6-1.2: 1.

in the above method for preparing a nanocomposite paste, in step S1, the dry pulverization includes primary pulverization and secondary pulverization, and an anionic sodium polycarboxylate dispersant is added before the secondary pulverization after the primary pulverization, wherein the mass ratio of the anionic sodium polycarboxylate dispersant to the tourmaline raw material is 1-1.5: 1.

in the above method for preparing a nanocomposite paste, in step S2, the dispersing agent is a pyridinium salt, and the tourmaline powder, the pyridinium salt and deionized water are mixed in a ratio of 1: 0.003-0.005: 20-50.

In the preparation method of the nano composite slurry, the tourmaline powder, the pyridinium salt and the deionized water are prepared by the following steps of firstly, fully mixing the tourmaline powder and the deionized water, then adjusting the pH value to 8-10, and finally adding the pyridinium salt and fully mixing.

Compared with the prior art, the invention has the advantages that:

1. the nano composite slurry provided by the invention has the advantages of excellent stability, simple and convenient process, easy operation and good dispersion effect, can be widely applied in a large scale, and can be used in the fields of textile and the like on the basis of increasing the negative ion release value, bacteriostasis, mildew prevention and the like of the coating.

2. The invention reduces agglomeration to the maximum extent by compounding the size while crushing the tourmaline and is beneficial to the mixing of tourmaline particles and a solvent.

3. The nano composite pulp provided by the invention utilizes the piezoelectric effect and the pyroelectric effect of the nano tourmaline particles, reduces the agglomeration phenomenon of the nano tourmaline particles, has narrow particle size distribution, low average particle size, spherical nano particles and low agglomeration degree, and enhances the stability of the nano composite pulp.

4. The invention carries out gel state compounding on the nano particles, and further enhances the dispersibility of the tourmaline particles and the stability of the slurry.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments. All materials were commercially available and the data listed were averaged over the three values.