Due to its unique properties, xanthan gum has extremely wide applications in over a dozen fields, including food, petroleum, pharmaceuticals, and daily chemicals. Its high degree of commercialization and wide range of applications surpasses that of any other microbial polysaccharide.
1. Food Applications: Xanthan gum is added to many food products as a stabilizer, emulsifier, suspending agent, thickener, and processing aid. Xanthan gum can control the rheology, structure, flavor, and appearance of products, while its pseudoplasticity ensures a good taste. Therefore, it is widely used in salad dressings, bread, dairy products, frozen foods, beverages, condiments, brewing, confectionery, pastries, soup bases, and canned foods. In recent years, people in more developed countries have often worried about the high calorie content of food leading to weight gain. Xanthan gum, because it cannot be directly degraded by the human body, alleviates this concern. Furthermore, according to a 1985 report from Japan, a comparative test of eleven food additives showed that xanthan gum was the most effective anticancer agent.
2. In the daily chemical industry: Xanthan gum molecules contain a large number of hydrophilic groups, making it an excellent surfactant with antioxidant and anti-aging properties. Therefore, it is a key functional ingredient in almost all high-end cosmetics. Furthermore, xanthan gum can be used as a thickener and stabilizer in toothpaste, reducing tooth surface wear.
3. In the medical field: Xanthan gum is a highly sought-after functional component in microcapsule drug delivery systems, playing a crucial role in controlling drug release. Due to its strong hydrophilicity and water-retention properties, it also has many specific medical applications, such as forming a dense water film to prevent skin infections and alleviating thirst after radiotherapy. In addition, Li Xin and Xu Lei have written that xanthan gum itself has a significant enhancing effect on humoral immunity in mice.
4. Industrial and Agricultural Applications: In the petroleum industry, due to its strong pseudoplasticity, a low-concentration xanthan gum (0.5%) aqueous solution can maintain the viscosity of drilling fluid and control its rheological properties. Therefore, the viscosity is extremely low in the high-speed rotating drill bit area, saving power; while maintaining high viscosity in the relatively stationary borehole area, thus preventing wellbore collapse. Furthermore, due to its excellent salt resistance and heat resistance, it is widely used in drilling in special environments such as marine areas and high-salt zones, and can be used as an oil displacement agent to reduce dead oil zones and improve oil recovery rates.
