Acid modified chitosan adsorbent

Acid modified chitosan adsorbent

①Pyruvic acid modification: Swell 1.

②Modification of α-ketoglutarate After swelling a certain amount of chitosan with distilled water for 24 hours, add α-ketoglutarate at a certain molar ratio , stir at room temperature until the solution is transparent, and filter with glass fiber

③Use thioglycolic acid as the thiolating agent to modify 20 mL of thioglycolic acid and 15 mL of acetic anhydride .

④Acrylic acid as monomer graft copolymerization The author and members of the research team used cross-linked spherical chitosan beads as the skeleton and acrylic acid (AA) as the monomer.

Add a certain mass of cross-linked spherical chitosan beads (with a water content of 25.

a.

Table 4-50 The influence of the type of initiator on the grafting reaction

The data in Table 4-50 shows that the type of initiator has a great influence on the grafting reaction process.

b.

c.

Table 4-51 The effect of monomer dosage on grafting reaction

It can be seen from Table 4-51 that as the monomer concentration increases, the concentration of chitosan monomer free radicals increases, and the polymerization rate increases, which is beneficial to the graft copolymerization of chitosan.

d.

e.

Related links: Aldehyde modified chitosan adsorbent (2)