Preparation and Properties of Hydrogel Microparticles Based on Chitosan
- PDF / 287,276 Bytes
- 9 Pages / 594 x 792 pts Page_size
- 61 Downloads / 401 Views
PREPARATION AND PROPERTIES OF HYDROGEL MICROPARTICLES BASED ON CHITOSAN A. N. Kraskouski,1 V. V. Nikalaichuk,1 V. I. Kulikouskaya,1 K. S. Hileuskaya,1 J. N. Kalatskaja,2 E. L. Nedved,2 N. A. Laman,2 and V. E. Agabekov1
UDC 54.057:544.77:577.114
Positively charged (zeta potential 22-31 mV) hydrogel microparticles based on low and high molecular weight chitosan were synthesized. The effect of the crosslinking agent on their physicochemical characteristics was studied. It was established, that among obtained hydrogel particles, the ones based on low molecular weight chitosan crosslinked with citrate anions, followed by additional treatment with glutaraldehyde, are the most promising as carriers of growth regulators or plant protection products.
Keywords: chitosan, ionotropic gelation, crosslinking agent, phytotoxicity.
One of the latest trends in crop production is the development of scientifically based technologies that ensure sustainable growth of plant productivity in the current global climate change and reduce the environmental impact on the ecosystem. An important component of such technologies is the use of non-toxic complexes of physiologically active compounds in polymer matrices – resistance inducers and plant growth regulators [1, 2] that are capable of biodegradation, which have a wide range of action due to complementary functions of their components. Polysaccharide-based hydrogel particles are promising materials for the development of new delivery systems for plant growth regulators [3, 4]. Polysaccharides act not only as carriers of active components in such systems, but also show their biological effect [5, 6]. For example, chitosan, which is a natural polysaccharide, has fungicidal, antiviral, elicitor, and other activities [7, 8]. Thus, the authors [9] showed that low molecular weight phytoactive chitosan (M < 15 kDa) and salicylic acid have a therapeutic and protective effect against the potato virus Y, which is higher with the combined use of components compared to a separate use, both in vitro and in field studies. Chitosan as an elicitor increases plant resistance to fungal [10, 11] and viral [12] diseases. Chitosan particles systems have a wide range of applications in sowing and pre-sowing protection and can be used to deliver pesticides, fertilizers, and genetic materials [13]. The use of nanoparticles of chitosan with paraquat (N,N¢-dimethyl-4,4¢-dipyridylium dichloride) has reduced the toxicity of the herbicide, which allows bringing weeds under control with less damage to the environment [14]. The authors [15] report the fungicidal activity of chitosan nanoparticles depending on its molecular weight. There is also data [16] regarding the positive effect on plant growth and development, as well as the effective use of chitosan nanoparticles with anionic proteins isolated from Penicillium oxalicum in the treatment of ________ 1 Institute of Chemistry of New Materials, NAS of Belarus, Minsk, Belarus. E-mail: [email protected]. 2 V. F. Kuprevich Institute of Experimental Botany,
Data Loading...
