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The multi-dimensional oscillating nano-ball milling technology and multi-level grading nano-ball milling technology invented by Lu Qing and Qu Yuan have better solved the technical application of nano-plant powder preparation (the former has obtained patents, and the latter has entered the trial).
1. Nano-plant ball milling preparation technology
1. Multi-dimensional oscillating high-energy nano-ball milling technology. The multi-dimensional oscillating high-energy nano-ball mill passes the rapid multi-dimensional oscillating movement of the tank, which causes the irregular movement of the grinding medium to generate a huge impact force, prolongs the trajectory of the grinding medium, improves the impact energy, and reduces the impact blind spot. The working efficiency is The tens of times of the traditional ball mill can significantly improve the impact energy and the number of movements in the tank, so that the particles of the pulverized material reach the nanometer level, and the uniformity of the powder particles is greatly improved. The pulverized particle size is at least 10 nm. Closed high energy ball mill. Qinhuangdao Taiji Ring Nano-product Co., Ltd. has successfully developed nano-food (nano-tea, nano-coffee) and nano-medicine (external paste) with this equipment, and began to promote its application.
The equipment is used in a wide range of applications. In addition to plants, organic and inorganic materials such as metals, non-metals, multi-alloys, mechanized alloys, animals, minerals, and medicinal materials can be subjected to nano-scale pulverization experiments and production (flammable and explosive materials are required). Add a protective agent such as argon, nitrogen, carbon dioxide, etc.).
2. Multi-level hierarchical nano-ball milling technology
The multi-level grading nano ball mill adopts the principle of the bartender's arm movement, and the bidirectional repeated fast operation enhances the probability of the trajectory change of the grinding media, resulting in high energy impact, causing the material to impact the ball mill during the movement, and the micron-sized powder is in the multi-cavity, multi-level The multi-diameter grinding medium (from large to small) flows continuously and pulverizes to produce a grading and pulverizing effect, and finally pulverizes into a powder of 10 nm or more. The equipment is an open ball mill, which can continuously feed and discharge, dry grinding and wet grinding. It can be widely used in animal, plant, mineral, metal, ceramic and non-flammable and explosive organic and inorganic materials.
Second, some problems in the preparation of nano-plant powder ball milling
1, temperature problems. Since the above two ball milling techniques are high-energy ball milling, they will heat up rapidly, and the plant powder is easily coked and carbonized. In order to keep the plant components unchanged, temperature is the first problem to be solved. Closed ball milling, although it can be cooled by liquid nitrogen, due to the purity of liquid nitrogen (usually the purity of liquid nitrogen is difficult to control), plants are easily contaminated and the production cost is high. For this reason, we use tank jackets to circulate water for cooling. , effectively control the temperature of the process.
2. Humidity problem. Usually, the dry content of the plant is about 5-10%, which increases the toughness and elasticity of the plant. In order to increase its brittleness, it is necessary to remove the water. We use the micron powder to dry at 55 ° C for 4-6 hours, and then dry and then ball milled to obtain better results. If the experimental equipment is used for the sample, the roots, stems, skins, leaves, flowers, and fruit mashes (or small pulverizer coarse powder) can be directly dried and then canned. If fresh plants are used, the pulp is first beaten with a conventional pulverizer, and then the nano-plant slurry is prepared by a high-energy ball mill, and then spray-dried, such as preparing green tea or raw herbal tea.
3. Sticky toughness problem. Plants contain sugar. If the sugar content is too high, the problem of visco-toughness will occur. If there is too much oil and too much gum, there will be problems such as ripening, sputum, jujube, frankincense, myrrh, etc. It is easy to stain the ball in the ball mill. , the ball into a group, can not achieve a good crushing effect. These varieties, such as the use of deep-frozen ball mills, such as the addition of liquid nitrogen will pollute the plants, the freezing of the refrigerator to remove the feed will produce temperature problems. In this regard, we use wet-type slurry grinding, the method is: after the traditional pulverization, adding water to stir the slurry, and then using the ball mill to prepare the nano-slurry, after the ball-milling effect is taken out, using spray drying, the problem is better solved, and the method is retained. The characteristics of the original plant.
4. Pollution problems. The ball milling technology, especially the high-energy ball milling technology, has a very serious pollution problem. If steel balls are used, cooling and cooling are not carried out, and material pollution is very serious. After cooling with water cooling, the steel ball is replaced with nano-zirconia balls, and the tank is also replaced with zirconia lining to minimize material contamination. If the plant is crushed, the grinding ball is replaced once every six months, and the pollution is quite low. In addition, zirconium is also a trace element required by human teeth and bones. It has a very small amount of zirconium in food and health care products, which is beneficial and harmless.
5. The problem of particle agglomeration. The plant is pulverized to nanometer size, its specific surface area is large, its surface energy is high, its surface charge is very large, and most of them are hydrophilic substances, which are easy to absorb water to produce agglomeration, while health care products and foods tend to be made into plant drinks, reunited. Nano-plant powder is difficult to disperse when it is washed with water, and it is easy to precipitate, affecting the sensory effect, and the taste is also sloppy. The way to overcome this shortcoming has become the trade secret of companies in various countries. One is to add a food grade dispersant to the micron-sized material before ball milling, and perform surface modification during ball milling to remove surface energy, eliminate surface static electricity, and improve dispersibility. The dispersant can also improve the ball milling effect; the other is to add a food-grade surface modifier to the micron-sized material before ball milling, and modify the surface of the nano-plant particles by grinding and dispersing in the ball milling process to improve the dispersibility. No matter whether it is brewed with cold or hot water, the green tea immediately turns green and the black tea immediately brightens and does not precipitate for a long time.
6, particle size and uniformity problems. The particle size, i.e., the particle size of the particles, is generally expressed as an average particle size, that is, a statistical average particle diameter value of the powder. How large is the size of nano-plant powder? For many years, we believe that the average particle size should not be less than 100 nanometers. It is best between 120 and 180. The plants in this interval not only break the wall, but also the cells inside have been broken. The physical refinement process has been completed and nutrition can be achieved. And the full absorption of the pharmaceutical ingredients (except for the study of viral plants). If you completely pursue below 100 nanometers, increase the risk of instability, modification, denaturation and toxic side effects. The purpose of nano-plant processing is to increase its high absorbency, and it is still too early to produce new modified materials.
The uniformity is the distribution range of the particles. The more concentrated the distribution, the more uniform the particles, and the poor uniformity of ball-milling to prepare nano-powders, so it is not ideal for the preparation of strictly nano-modified materials such as metals. However, it is suitable for the preparation of nano-plant powders, because the physical processing of nano-plants is for "conservative" rather than modification. So we strive to control the particles mostly at 60-180 nm. The main point of control is: to minimize the ball milling time. So we use the "three-step method of nano-tea preparation." It is pulverized by the traditional method and then pulverized by airflow (air pulverization is the collision between materials, does not increase the pollution of iron), and then the micron-sized material is subjected to high-energy ball milling to prepare nano-powder, which greatly shortens the ball milling time and reduces the ball milling time. Pollution.
After the first two steps of control (such as pulverization, sieving, jet pulverization, and sieving), the problem of uneven ball milling particles is largely solved. Achieve the desired uniformity.
Third, the development and prospect of nano-plant powder ball milling technology
Plants contain a large amount of organic matter such as proteins, amino acids, vitamins, cellulose, trace elements, and dozens of essential inorganic mineral elements and pharmaceutical ingredients, which have important health care effects on the human body. Studies have proved that if they are not broken Walls, nutrients or medicinal ingredients are not fully absorbed, and in physical pulverization technology, ball milling technology is favored for its high efficiency and low cost. However, in the preparation of nano-powders, especially in the preparation of nano-plant powders, new challenges have been encountered, such as uneven particle size, serious pollution, and too long processing time. After several years of embarrassment, new ball milling technology is also developing. Looking back, it is still a low-cost, high-efficiency feasible method for nano-plant powder preparation.
The nano-plant powder prepared by multi-dimensional oscillating and multi-level grading new ball milling technology is processed by pure physical method. The plant itself has no damage and does not introduce other components, which relatively guarantees the naturalness and integrity of the plant components. The field of application is particularly extensive.
Our practice has stated and will continue to prove that Japan has taken the lead in introducing ultra-fine technology into the field of plant Chinese medicine. We are the first to develop and introduce high-energy nano-ball milling technology into the field of plants and Chinese medicine. This new pulverization technology and the nano-scale plant powder prepared by it will bring new vitality to the plant processing related industries and become a new growth point in the food, health care products, cosmetics and Chinese medicine industry, with its high solubility and high dissolution. Degree, high absorbency, high adsorption strength, and high bioavailability produce fast-acting, efficient, long-lasting products that serve human health.
Application of nano-plant powder ball milling preparation technology
The research and development of nano-plant powder products is slow, such as nano-pollen, fungus and other natural plant health foods, valuable medicinal plants such as ginseng, ganoderma spores, pearls, and cordyceps, and nano-plant powders of toxic medicinal plants such as sphagnum The product is still in the development stage. There are both scientific and technical issues here. In terms of scientific issues, such as the problem of nano-plant powders, there have been application articles published. This article is about technical application issues.