mortar additive hpmcMay 11th 2023
HPMC manufacturer-What is cellulose ether?
Expanding the high value-added utilization of cellulose-based natural resources is the need of the national renewable resources development strategy, and is one of the hotspots in the development of global economy, energy and new materials. Cellulose ether is an important cellulose derivative. It is a general term for a variety of derivatives obtained from natural cellulose as raw materials through alkalization, etherification, purification and drying. It occupies an increasingly important role in the national economy. status.
Most cellulose ethers have the following characteristics.
(1) The raw material resources are abundant and renewable. The raw material of cellulose ether is natural cellulose. It is the most abundant natural organic renewable resource on earth, and there are trillions of tons of plant cellulose regenerated through photosynthesis every year.
(2) Biodegradable, low calorie, non-toxic and good biocompatibility. Most cellulose ethers are environmentally friendly, non-toxic and harmless to humans and animals, and can be used in food, medicine, cosmetics and other industries.
(3) The product has a wide range of uses. As an important water-soluble polymer, cellulose ethers are used in petroleum exploration, ceramics, washing powder, food, medicine, cosmetics, printing and dyeing, building materials, papermaking, textiles, coatings, leather, polymer polymerization, aerospace and national defense, etc.
(4) The products are rich, the performance is diverse, and the output is large. There are many kinds of cellulose ethers. There are dozens of cellulose ethers that can be synthesized at present, and there are more than ten kinds of cellulose ethers with large-scale production conditions. Its total annual production capacity is more than 600,000 tons, of which about 200,000 tons of non-ionic cellulose ethers and more than 400,000 tons of ionic cellulose ethers are still growing.
The earliest synthesized cellulose tunnel was methyl cellulose (MC) synthesized by Suida in 1905. Lilienfeld first prepared ethyl cellulose (EC) in 1912 by using diethyl sulfate as an etherifying agent to react with alkali cellulose .E. Jansen prepared carboxymethyl cellulose (CMC) in 1918. Then people successively prepared a variety of cellulose ethers, such as hydroxypropyl cellulose (HPC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl cellulose (HEC), hydroxypropyl carboxymethyl cellulose ( HPCMC) and other cellulose ethers. At the same time, the preparation method, process control, performance research and product application of cellulose have been greatly developed. Some new cellulose ether products, new processes, new equipment, new theories, new application fields and new application technologies are constantly emerging.