Pure lactic acid is a colorless liquid, is a colorless to pale yellow liquid. Odorless, hygroscopic. The relative density of 1.2060 (25/4 ℃). Melting point 18 ℃. Boiling point 122 ℃ (2kPa). Refractive index nD (20 ℃) ??1.4392. With water, ethanol, glycerin, insoluble in chloroform, carbon disulfide and petroleum ether. Heating under normal pressure, concentrated to 50%, part of the anhydride into milk, thus products often contain 10% -15% of the milk anhydride.
2013年8月4日星期日
PLA is the field of medicine
Bio-pharmaceutical industry is the first to carry out polylactide application areas. Lactic acid on human security can be highly absorbed by tissue, combined with its excellent physical and mechanical properties, can also be applied in the biomedical field, such as disposable infusion set, to avoid demolition-type surgical sutures, drug relief package agents, artificial fractures fixation materials, tissue repair materials, such as artificial skin. High molecular weight magnessium lactate has a very high mechanical properties, in Europe and other countries have been used instead of stainless steel, as a new type of orthopedic fixation materials such as bone screws, bone plates are heavily used, which can be absorbed by the body metabolism characteristics make patients from secondary pain of surgery. Its technology and high added value, the medical industry, the development prospects of polymer materials.
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