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A method for the preparation of polymeric nanocapsules without stabilizer
1PCLCC, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, China.
Summary
Researchers developed poly(L-lactide) nanocapsules for bovine serum albumin (BSA) delivery using a novel glycerin-water system. Polymer hydrophilicity significantly impacts BSA entrapment efficiency in these nanocarriers.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Drug Delivery Systems
Background:
- Polymeric nanocapsules are promising for drug delivery.
- Traditional stabilizers can affect nanocarrier properties.
- Developing efficient and stable nanocarrier systems remains a challenge.
Purpose of the Study:
- To prepare poly(L-lactide) nanocapsules for bovine serum albumin (BSA) encapsulation.
- To investigate the effect of a glycerin-water mixture as a stabilizer.
- To evaluate the influence of polymer hydrophilicity on encapsulation efficiency.
Main Methods:
- Modified W/O/W double emulsion technology was employed.
- Poly(L-lactide) (PLLA) and polycaprolactone-poly(ethylene oxide) block copolymer (PCE) were used as encapsulating polymers.
- Bovine serum albumin (BSA) was used as a model protein payload.
- Nanocapsule size and BSA entrapment efficiency were analyzed.
Main Results:
- Spherical poly(L-lactide) nanocapsules were successfully prepared.
- A glycerin-water mixture enhanced nanocapsule formation due to viscosity and hydroxyl groups.
- BSA entrapment efficiency was higher with the more hydrophobic PLLA compared to PCE.
- Hydrophilicity of the polymer significantly influenced BSA entrapment efficiency.
Conclusions:
- Glycerin-water mixtures are effective stabilizers for PLLA nanocapsule preparation.
- Polymer hydrophilicity is a critical factor determining protein encapsulation efficiency.
- PLLA nanocapsules show potential for effective BSA delivery.