In recent years, silicone products have gradually become a research hotspot, mainly because their molecular structure is different from general hydrocarbon surfactants and have both inorganic characteristics and organic functions. On the one hand, silicones have relatively stable properties, such as heat resistance, low temperature adaptability, antistatic property, water repellency and biochemical inertness, and can be widely used in the production of medical devices. On the other hand, silicones also have low surface properties, low toxicity and antibacterial properties, and can be used in fabric finishing and pesticides. Therefore, silicone surfactants have broad application prospects and huge development potential, and the prospects are good.
The hydrophobic group of the surfactant is composed of an alkylsiloxane backbone, which is stronger in hydrophobic properties than traditional carbon-chain hydrocarbon surfactants. It shows lower surface tension in the solution at the same concentration, and the higher hydrophobic group Si-O bond energy (105kcal/mol) makes it more stable, making it a highly efficient surfactant. The surfactants currently on the market are soluble, easy to elute, and easy to gradually accumulate on the surface of the human body. Long-term use is easy to cause lesions. If methoxysilanes are used to replace the alkyl groups of ordinary silanes, their properties can be greatly changed. First, methoxysilane has silane coupling properties. When diluted with water, silanol and methanol are formed due to hydrolysis of methoxy groups. The hydrolyzed organosilicon compound can be bonded to the fiber through covalent bonds, that is, the hydroxyl group in the silanol reacts with the fiber surface through dehydration condensation and closely bonds with each other to form a strong membrane; secondly, the toxicity and irritation of the organosilicon surfactant are greatly reduced.
Allyl polyether is the production ofAn important material for non-ionic silicone surfactants. It is widely prepared by hydrosilylation addition reaction between hydrosilane and allyl polyether containing unsaturated double bonds under certain conditions. Polyether-modified silicone emulsifier can be synthesized by hydrosilylation addition reaction using hydrogen-containing silicone oil and allyl-terminated polyether as raw materials under the catalysis of chloroplatinic acid. The results show that the surfactant can effectively reduce the surface tension and has excellent emulsifying properties.
Hangzhou Danwei Technology Co., Ltd. specializes in customizing allyl polyether with different EO/PO ratio and molecular weight. Welcome to consult: 0571-82890506 13567543015.
