Supercritical antisolvent micronization of some biopolymers

被引:112
作者
Reverchon, E
Della Porta, G
De Rosa, I
Subra, P
Letourneur, D
机构
[1] Univ Salerno, Dipartimento Ingn Chim & Alimentare, I-84084 Fisciano, SA, Italy
[2] Univ Paris 13, Inst Galilee, CNRS, Lab Ingn Mat & Hautes Press, F-93430 Villetaneuse, France
[3] Univ Paris 13, Lab Rech Macromol, F-93430 Villetaneuse, France
关键词
supercritical antisolvent micronization; biopolymers; nano and micro-particles;
D O I
10.1016/S0896-8446(00)00069-3
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We processed various biopolymers by semi-continuous supercritical antisolvent precipitation (SAS) to evaluate the possibility of producing nano and micro-particles of controlled size and distribution. First, some liquid expansion curves were experimentally produced to study the general behavior of the ternary systems antisolvent-solvent-biopolymer. A condition that guarantees a successful SAS micronization is that solute does not modify the expansion curves of the solvent-antisolvent binary system. SAS experiments were performed by varying the process parameters; we mainly studied the influence of pressure, temperature and liquid solution concentrations. SEM images of the processed material were used to study morphologies, mean particle size and particle size distribution. We successfully processed by SAS dextran, poly-L-lactide (PLLA) and poly-(hydroxypropylmethacrylamide) (HPMA), using dimethylsulfoxide (DMSO) and dichloromethane (DCM) as liquid solvents. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:239 / 245
页数:7
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