Pedagogical experience: 14 years. He has been working in this position since 2021.
Khuzhanov Erkin Berdiyevich is a multifaceted scientist with high scientific potential and professional skills, as well as an innovative educator. In his field, he stands out for his constant inquisitiveness, dedication of his knowledge and experience to young people, enthusiasm, and sense of responsibility.
He participated in creating a new generation of physics textbooks in the republic and developing the national curriculum. In 2020, he defended his dissertation for the degree of Doctor of Philosophy (PhD) in Pedagogical Sciences on improving the methodology of teaching physics in secondary schools. He is considered a prominent scientist among scholars working to increase the effectiveness of physics education in the continuous education system of Uzbekistan.
In 2025, he was awarded the academic title of professor and the badge of "Excellence in Public
EDUCATION
Physics and astronomy bachelors, method teaching physics masters
RESEARCH, TEACHING, or OTHER INTERESTS
Physics and Astronomy, Computer Science, Education, General Physics and Astronomy
VISCOELASTIC CHARACTERIZATION OF AQUEOUS POLYACRYLAMIDE SOLUTIONS: A COMPREHENSIVE RHEOLOGICAL INVESTIGATION and Ummatjon A. Asrorov New Materials Compounds and Applications, 2025 This study investigates the viscoelastic properties of aqueous solution of polyacrylamide using the Anton Paar MCR 92 Rheometer to assess its storage (G′(ω)) and loss (G′′(ω)) moduli across various frequencies. Initial findings indicate that at lower frequencies, polyacrylamide exhibits viscous behavior with minimal elasticity, attributed to the coiled state of the polymer chains. As frequency increases, the material transitions to displaying significant elastic characteristics, suggesting an uncoiling of the polymer chains. At higher frequencies, both G′(ω) and G′′(ω) rise, indicating more solid-like behavior due to molecular alignment, which reduces viscosity and enhances elasticity. The molecular mass, measured using an Ubbelohde capillary viscometer, aligned with literature values, affirming the reliability of the experimental data. Additionally, the activation energy (Eα=88.95 kJ/mol) was determined using the Time Temperature Superposition (TTS) principle and the Williams-Landel-Ferry (WLF) model, emphasizing polyacrylamide's high thermal and mechanical stability, ideal for applications requiring robust performance in dynamic environments.
STRUCTURE AND PHYSICO-MECHANICAL PROPERTIES OF POLYELECTROLYTE COMPLEXES BASED ON SODIUM CARBOXYMETHYLCELLULOSE POLYSACCHARIDE AND POLYACRYLAMIDE Sabitjan Ya. Inagamov, Ummatjon A. Asrorov, Erkin B. Xujanov East European Journal of Physics, 2023 In this paper, the structure and physico-mechanical properties of films of polyelectrolyte complexes (PEC) based on sodium carboxymethylcellulose (Na-CMC) with linear polyacrylamide (PAA) have been studied. Polyelectrolyte complexes were obtained by mixing aqueous solutions of Na-CMC and PAA components in various ratios of components and pH of the medium. The structure of the obtained products was determined using IR spectroscopy and electron microscopy. IR spectra in the range 400–4000 cm-1 were recorded on NIKOLET Magna-560 IR and Specord-75IR spectrophotometers (Carl Zeiss, GDR). The mechanical properties of films of polyelectrolyte complexes were determined by stretching at a constant speed of movement of the lower clamp, 50 mm/min, on an Instron-1100 automatic dynamometer (England) at room temperature. IR spectroscopic data showed that polyelectrolyte complexes based on Na-CMC and PAA were stabilized due to the cooperative ionic bond between Na-CMC carboxylate anions (-COO-) and amine groups (-NH2) of polyacrylamide. It is shown that PEC films with an equimolar ratio of Na-CMC and PAA components have an increased value of mechanical strength (σр = 38 MPa), elastic modulus (Е = 73 MPa) and a minimum relative elongation (ε = 0.5%). And in excess of Na-CMC or PAA leads to a decrease in mechanical strength and elastic modulus, which is associated with a decrease in the frequency of intermolecular bonds. It has been ascertained that water-soluble polyelectrolyte complexes based on Na-CMC and PAA with increased strength properties can be obtained from solutions of components taken at an equimolar ratio of interacting components. By changing the ratio of components, properties such as mechanical strength, modulus of elasticity and elongation can be controlled. This can serve as one of the means of controlling the structure and properties of Na-CMC and PAA polyelectrolyte complexes. The regulation of the physico-mechanical properties of PEC films opens up wide opportunities for their use as a soil structure former in agriculture and water management and as the basis for soft drugs in pharmacy.
