What is the application potential of nano calcium carbonate in biodegradable materials?
Publish Time: 2025-04-27
With the enhancement of global environmental awareness and the pursuit of sustainable development, biodegradable materials have received widespread attention because of their ability to reduce environmental pollution. As a functional filler, nano calcium carbonate has shown great application potential in the field of biodegradable materials due to its unique physical and chemical properties.1. Basic characteristics of nano calcium carbonateNano calcium carbonate is a fine particle form of calcium carbonate with high specific surface area, good dispersibility and excellent mechanical properties. Its particle size is usually less than 100 nanometers, and the special size effect gives it performance advantages different from ordinary calcium carbonate. For example, nano calcium carbonate exhibits higher hiding power, whiteness and extremely low oil absorption, which provide possibilities for its application in different fields.2. Introduction to biodegradable materialsBiodegradable materials refer to a class of materials that can be decomposed into harmless substances such as carbon dioxide and water by the action of microorganisms in the natural environment. Such materials include but are not limited to polylactic acid (PLA), polyhydroxyalkanoates (PHA), etc. They are widely used in packaging, agricultural covering films and other fields, aiming to replace traditional plastic products and alleviate white pollution problems.3. The role of nano calcium carbonate in biodegradable materialsEnhance mechanical properties: Adding nano calcium carbonate to biodegradable materials can significantly improve the tensile strength, impact strength and other mechanical properties of the composite material. This is because nano calcium carbonate particles can form an effective reinforcing network structure inside the matrix, thereby improving the firmness and durability of the overall material.Promote the degradation process: Studies have shown that the presence of nano calcium carbonate helps to accelerate the decomposition rate of biodegradable materials. On the one hand, nano calcium carbonate itself can serve as a carrier for microbial growth and promote microbial attachment; on the other hand, it can also adjust the pH value of the material surface, create environmental conditions conducive to microbial activity, and thus accelerate the degradation rate.Optimize processing performance: Due to its special morphology and size distribution, nano calcium carbonate can effectively reduce the viscosity of biodegradable materials, improve melt fluidity, and make the processing process smoother. In addition, the modified nano calcium carbonate has an extremely low oil absorption value, which not only reduces the amount of additives, but also reduces production costs.Improve product appearance quality: High whiteness and high hiding power are one of the important characteristics of nano calcium carbonate. When used to prepare biodegradable materials, these properties can help obtain finished products with uniform color and high gloss, meeting the market's aesthetic needs for high-quality environmentally friendly products.4. Practical application case analysisAgricultural mulch: Biodegradable mulch filled with nano calcium carbonate can not only ensure the heat preservation and moisture retention effect required during crop growth, but also decompose quickly after use, avoiding the soil pollution problem caused by the residue of traditional PE mulch.Disposable tableware: Disposable tableware made of biodegradable plastics enhanced by nano calcium carbonate has sufficient strength to withstand daily use requirements and can be naturally degraded in a short time after being discarded, becoming an effective solution to "white garbage".In summary, nano calcium carbonate has great application potential in biodegradable materials. Through reasonable design and optimization of formula, nano calcium carbonate can not only significantly improve the performance indicators of biodegradable materials, but also help promote the development of green manufacturing technology.
