Design and development of mild surfactants for human body

2019-10-16 09:59:44

With the increasing awareness of environmental protection, more and more attention has been paid to the environmental safety of surfactants, such as the discussion on whether surfactants cause harm to environmental safety, the ecology and toxicity assessment of surfactants, etc. At the same time, many people worry that with a wide variety of daily chemical products becoming people's daily necessities, such as toothpaste, soap, tableware detergent, washing powder (agent) and all kinds of cosmetics, everyone will take a certain amount of surfactants more or less every day. Therefore, there is a growing call for the research and development of environmental friendly, non-toxic and biodegradable surfactants.

At present, the research, production and utilization of surfactants are developing towards green and functional direction. The specific performance is as follows:

1) improve the molecular structure of surfactants and develop green surfactants that are easy to be biodegraded. For example, alkenyl sulfonates, oxidanes, polyoxyethylene nonionic surfactants, crown ethers, starch based, amino acid based polymer surfactants, amphoteric surfactants, biosurfactants with excellent degradation performance will gradually replace alkyl, aryl sulfonates, polyoxyethylene alkylphenol ethers with benzene ring and other hard to biodegrade surfactants.

2) design and develop a mild surfactant for human body to avoid significant damage to human skin and internal organs during the use of surfactant.

3) in the process of surfactant synthesis, we should make full use of the synergistic effect between surfactants, screen and develop multi-functional treatment agents, expand the cleaning function, and reduce the cost of treatment agents.

4) in consideration of the green of surfactant products and raw materials, the research and development of green chemical synthesis process of surfactant should be strengthened. In the cable tray, the appearance of the socket, the material used for the panel, the number of sockets and so on all determine the quality of the whole tray body and the use effect, but the real power on situation is determined by the copper strip inside the socket. The thick copper strip with good elasticity is the best choice, and the good socket copper strip is the key part to avoid the fire hazard.

Some of the poor quality spots on the market are broken. Most of the copper pieces are ordinary brass, with the thickness of less than 0.4mm. Moreover, the surface of the copper pieces is not treated safely, which is easy to be oxidized, corroded, deformed by heat, and the long-term use toughness is poor, resulting in poor contact between the plug and the socket. It is necessary to plug and unplug repeatedly when power is on to ensure that the contact is in place. After plug in, it may also loose and affect the normal power consumption.

The high-quality cable tray is made of phosphor bronze with a thickness of 0.5mm. The copper surface is also nickel plated. It has strong elasticity, excellent corrosion resistance, oxidation resistance, good thermal conductivity, and is not easy to loose, which reduces the possibility of fire.

In addition, for the socket, in addition to the copper material, the thickness of the copper is also an important consideration. The thick pure copper plug-in has the following advantages: strong and durable toughness, not easy to deform; suitable for long-term and multiple plugging, good contact between socket and plug, close connection; thick copper, can improve the current passing capacity, reduce the resistance of copper itself; thick copper, oxidation resistant, rust free, not easy to increase the resistance and heat due to copper corrosion. It can be said that good sockets play a decisive role in the quality of sockets.

At the same time, the material of the socket panel is also an important part to determine the service life of the cable reel, because the socket needs to be used for a long time. When the power is often on, the high temperature will cause the poor panel to burn and melt, which will affect the normal use of the cable reel.