Cholesterol removal from various samples by cholesterol-imprinted monosize microsphere-embedded cryogels.

Area of Science:

• Materials Science
• Biomedical Engineering
• Separation Science

Background:

• Cholesterol removal is crucial for various applications, including food processing and biomedical treatments.
• Developing efficient and selective adsorbent materials is an ongoing challenge.
• Poly(hydroxyethyl methacrylate) (PHEMA) cryogels offer a versatile matrix for material development.

Purpose of the Study:

• To develop and characterize cholesterol-imprinted microspheres embedded within PHEMA cryogels for selective cholesterol removal.
• To evaluate the adsorption capacity and reusability of the composite cryogel material.

Main Methods:

• Cholesterol-imprinted microspheres of poly(glycidyl methacrylate-N-methacryloyl-(L)-tyrosine methylester) were synthesized and embedded into PHEMA cryogels.
• Composite cryogels were characterized using swelling tests, BET surface area analysis, SEM, FTIR, and elemental analysis.
• Cholesterol removal efficiency was tested using homogenized milk and an intestinal mimicking solution.

Main Results:

• Embedding microspheres significantly increased the specific surface area of PHEMA cryogels from 13 to 72.7 m²/g.
• The composite cryogels demonstrated an 80% cholesterol removal rate from homogenized milk.
• A maximum adsorption capacity of 42.7 mg/g was achieved in an intestinal mimicking solution.
• The material maintained its adsorption capacity after 20 adsorption-desorption cycles.

Conclusions:

• Cholesterol-imprinted microspheres integrated into PHEMA cryogels create a highly effective composite material for selective cholesterol removal.
• The developed cryogel exhibits excellent adsorption capacity and remarkable reusability, indicating its potential for practical applications.