Generally, silane PEG is first dissolved in a mixture of ethanol/water solution, then allow the solution to contact with oxidized glass or silica surface for 30 min to 2 hours. Under this condition, silane PEG should bind to the material covalently.

Materials Required:

• Pegylation solution: Ethanol/water (w/w, 95%/5%);
• Silane PEG stock solution, 10~50 mg/mL in pegylation solution, prepare in fresh.
• Washing solution: Distilled water.

Reaction Steps:

1. Dissolve targeted materials in Pegylation buffer.

2. Add silane PEG stock solution to the targeted conjugation materials with the final concentration keep at least 10 mg/mL. 10~50 molar excess of silane PEG needed for optimal conjugation;

3. Allow mixture agitates at room temperature for 30 min at room temperature or 2 hours at 4 -20 ⁰C.

4. Wash out unreacted materials either by distilled water.