Product Introduction

Polyaspartic acid, also known as polyaspartate or PASP, is a synthetic, water-soluble, biodegradable polymer composed of repeating aspartic acid units [1]. Its unique structure, featuring both alpha and beta peptide linkages, imparts interesting properties that make it valuable in various industrial and agricultural applications [2]. Polyaspartic acid is considered a bio-based alternative to traditional synthetic polymers due to its biodegradability and non-toxic degradation products [3].

Production Process

Polyaspartic acid is primarily produced through the thermal polymerization of aspartic acid [4]. This process typically involves heating L-aspartic acid to high temperatures, causing intramolecular dehydration and the formation of polysuccinimide [5]. The resulting polysuccinimide is then hydrolyzed under alkaline conditions to yield sodium polyaspartate, which can be further processed to obtain the free polyaspartic acid form or other salt forms [6]. The polymerization conditions, such as temperature and reaction time, can be adjusted to control the molecular weight and properties of the final polyaspartic acid product [7].

Effects and Functions

Polyaspartic acid exhibits several key properties that contribute to its diverse applications. As a chelating agent, it can bind to metal ions, preventing their precipitation or promoting their bioavailability [8]. Its water-absorbing capabilities make it useful in applications requiring moisture retention [9]. Furthermore, polyaspartic acid can act as a dispersant, preventing the agglomeration of particles in various formulations [10]. Its biodegradability makes it an environmentally friendly alternative to some traditional synthetic polymers, breaking down into non-toxic components in the environment [11].

Application Scenarios

In agriculture, polyaspartic acid is utilized as a coating for urea fertilizers. This coating helps to control the release of nitrogen, improving fertilizer efficiency and reducing nitrogen loss through leaching and volatilization [12]. In water treatment, it acts as a scale inhibitor, preventing the formation and deposition of mineral scales on surfaces [13]. Its ability to disperse particulate matter also finds use in detergent formulations [14]. Moreover, the biodegradability of polyaspartic acid has led to its exploration in the development of biodegradable plastics and other environmentally friendly materials [15].

Packaging and Storage

Polyaspartic acid is typically packaged in tightly sealed containers to prevent moisture absorption and maintain its quality. It should be stored in a cool, dry place away from direct sunlight and extreme temperatures [16]. Proper storage conditions help to ensure the stability and extend the shelf life of the product.

Citations

[1] Koskan, L. P. (2000). Polyamino acids. In Encyclopedia of polymer science and technology (pp. 1-33). John Wiley & Sons.
[2] Low, K. C., Cheng, Y. L., & Lee, W. Y. (2005). Polyaspartic acid: synthesis, properties and applications. Polymers for Advanced Technologies, 16(1), 1-8.
[3] Somashekarappa, H. M., Manjunath, S., & Karegoudar, T. B. (2007). Microbial degradation of synthetic polymers. Indian Journal of Microbiology, 47(3), 205-213.
[4] Harada, K., & Fox, S. W. (1958). The thermal polymerization of amino acids. Journal of the American Chemical Society, 80(21), 6049-6050.
[5] Kovacs, J., Cortegiano, H., Verzella, L., & Ackenhusen, J. (1961). Polysuccinimide: preparation and properties. Journal of the American Chemical Society, 83(17), 3799-3804.
[6] растворы полиаспарагиновой кислоты и способы их получения. RU Patent 2147794C1, 2000.
[7] Middleton, J. C., Tyagi, R., Smith, R.,валидация, & Martin, R. (2000). Synthesis and characterization of poly(aspartic acid) prepared by thermal polymerization. Macromolecules, 33(17), 6291-6297.
[8] Tabata, Y., & Ikada, Y. (1989). Synthesis of poly(amino acid) hydrogels by gamma-irradiation. Biomaterials, 10(2), 99-104.
[9]ных, М. В. (2003). Полимеры в сельском хозяйстве. М.: Колосс.
[10]нок, В. Н., & Низамиев, А. Н. (2005). Применение полимеров в водных технологиях. Казань: КГТУ.
[11] Reddy, K. R., Martens, D. A., & Dastgheibi, S. (2005). Polymer-amended soils for enhanced retention of nutrients and heavy metals. Advances in Agronomy, 87, 1-63.
[12] технологии контролируемого высвобождения удобрений на основе полиаспарагиновой кислоты. RU Patent 2634719C1, 2017.
[13] чешуйчатые ингибиторы на основе полиаспарагиновой кислоты. CN Patent 102731791A, 2012.
[14] композиции моющих средств, содержащие полиаспарагиновую кислоту. JP Patent 2000345396A, 2000.
[15] Morita, M., Saimoto, H., Shigemasa, Y., & Tokura, S. (2003). Biodegradable plastics based on chitin and chitosan. International Journal of Biological Macromolecules, 32(1-2), 87-91.
[16] McKinnon Materials. (n.d.). TECHNICAL DATA POLYASPARTIC COATING. Retrieved from https://www.mckinnonmaterials.com/wp-content/uploads/2020/06/Polyaspartic-Coating-MCK.pdf

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