Hollow poly-l-lactic acid microbead prepared by phase inversion emulsification technique with a simple solvent evaporation

Main Article Content

Amorn Chaiyasat
Rangsimun Cheanjai
Pongsakorn Kaewdee
Jirasak Threeprom
Preeyaporn Chaiyasat

Abstract

In recent year, the use of plastic microbeads in the production of some cosmetic and personal care products is widely prohibited because the microbeads derived from petrochemical monomer is difficult to degrade in a short time. In addition, they transport toxic chemicals into the environment.  Therefore, this research aims to study the preparation of hollow polymer microbeads using biodegradable and environmental friendly polymer as poly-l-lactic acid (PLLA).  PLLA microbeads were prepared by a simple solvent evaporation technique with phase inversion emulsification (PIE) for the polymer solution droplet generation. Influences of surfactant molecular weight and PLLA content on the particle size and hollow particle formation were studied. It was found that polyvinyl alcohol (PVA) with molecular weight ~100,000 g/mol and 87-90% hydrolysis represented high performance in order to maintain the colloidal stability of microbeads with a size range of ~100-200 mm. The amount of PLLA affects the hollow formation inside the microbead particles. The increase PLLA amount increased the internal viscosity of the microbeads. During the PIE process, the oil droplet containing polar surfactant as PVA absorbed some water. Thereafter, the absorbed water was then coalesced during solvent evaporation and finally formed pore or multipore in the inside of the microbeads. Using 40:1 (wt) of PLLA:PVA ratio, multihollow microbeads were obtained where the hollow microbeads were observed with the other ratios of PLLA:PVA (20:1 and 10:1; wt). 

Article Details

How to Cite
1.
Chaiyasat A, Cheanjai R, Kaewdee P, Threeprom J, Chaiyasat P. Hollow poly-l-lactic acid microbead prepared by phase inversion emulsification technique with a simple solvent evaporation. J Appl Res Sci Tech [Internet]. 2018 Dec. 21 [cited 2024 Apr. 20];17(2):41-53. Available from: https://ph01.tci-thaijo.org/index.php/rmutt-journal/article/view/157103
Section
Research Articles
Author Biographies

Rangsimun Cheanjai, Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi

Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Thanyaburi, Pathumthani 12110, THAILAND

Pongsakorn Kaewdee, Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi

Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Thanyaburi, Pathumthani 12110, THAILAND

Jirasak Threeprom, STP Chem Solutions Co.Ltd., Bang Bou Thong, Nonthaburi 11110, THAILAND 


STP Chem Solutions Co.Ltd., Bang Bou Thong, Nonthaburi 11110, THAILAND 

Preeyaporn Chaiyasat, Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi

Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Thanyaburi, Pathumthani 12110, THAILAND

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