What are the high-end application fields of porous calcium carbonate?
Porous materials are a class of materials with special properties, generally with large specific surface area, good thermal stability, chemical stability and biodegradability, and a suitable degradation rate, which makes the material suitable for use in many fields such as medicine, electronics, and ceramics. It can be widely used and is a very promising functional material.
1. Drug carrier
Drug carriers are an important part of targeted drug delivery, especially in the treatment of some major diseases (such as cancer, hyperglycemia, etc.). The substance selected as the drug carrier should not only be able to load a sufficient amount of drugs without reacting with it, but also be able to fully release the drug under specific conditions to exert its efficacy, and at the same time, the carrier itself should be non-toxic and stable in nature, etc. Require. Traditional carriers are often difficult to decompose, toxic or have small pore capacity.
Using porous calcium carbonate as a carrier can not only effectively solve the above problems, but also can be directly used as a drug to supplement calcium, inhibit gastric acid, and the like. Therefore, in recent years, there have been more and more studies on the application of porous calcium carbonate in drug delivery at home and abroad.
2. Bioceramics
Calcium carbonate is widely used in biology and medicine because of its good osteogenic and osteoinductive activity, biocompatibility and degradability. Using natural resources with high calcium carbonate content such as natural coral as raw materials, the new porous calcium carbonate ceramic PCCC prepared by various methods such as salting out method can be made into cell scaffolds. It has been used as human bone marrow cells, In vitro culture of fibroblasts, gingival fibroblasts and fetal rat osteocytes. Clinically, orthopedics and oral and maxillofacial surgery use PCCC for the repair of bone defects, and have achieved good results.
3. Waste paper recycling
While the whole country attaches great importance to the supply-side reform, environmental protection is also paying more and more attention. In the field of environmental protection, the degree of recycling of waste paper has reached an unprecedented level. Asia’s waste paper consumption accounts for half of the global waste paper consumption, and its consumption in 2015 was about 103 million tons, far exceeding that of Europe and the United States. However, in terms of the key technology of recycling waste paper, due to the late start of China’s development and insufficient investment in the early stage, the technology is relatively backward and the scope of utilization of recycled paper is narrow.
4. Superhydrophobic surface material
Super-hydrophobic material, also known as imitation lotus leaf surface material, is a special material with a stable surface contact angle greater than 150° and a rolling contact angle less than 10°. The preparation of superhydrophobic materials is mainly affected by their surface, so it is the key to develop superhydrophobic surface materials.
5. Biosensors
Biosensors are rapid and trace analysis methods at the molecular level of substances, and have broad application prospects in clinical diagnosis, industrial control, food and drug analysis, environmental protection, and biotechnology research.
6. Biological microcapsules
Biological microcapsules originated in the 1950s, mainly encapsulating biologically active substances in microcapsules with selectively permeable membranes, and is the main technical means for immobilizing biological substances (cells, enzymes, etc.). Among the preparation methods of microcapsules, the template method is the most commonly used, and the templates usually used are all porous materials. In recent years, due to the strong development momentum of porous calcium carbonate, scientific researchers have also applied it to the preparation of biological microcapsules.
7. Other
Porous calcium carbonate is not only used in the above-mentioned fields, but also has good performance in many other aspects.