کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5435048 1509147 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The control of beads diameter of bead-on-string electrospun nanofibers and the corresponding release behaviors of embedded drugs
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
The control of beads diameter of bead-on-string electrospun nanofibers and the corresponding release behaviors of embedded drugs
چکیده انگلیسی


- Bead diameter of bead-on-string electrospun nanofibers was controlled by varying solvent ratio and polymer concentration.
- The effect of the addition of particle drugs on BD of bead-on-string electrospun nanofibers was studied.
- The corresponding release behaviors of nanofibers with different BD loading micro-particle drugs were investigated.
- Bead-on-string nanofibers with bigger BD could alleviate the initial burst release.

Bead-on-string nanofibers, with appropriate control of the beads diameter, are potential fibrous structures for efficient encapsulation of particle drugs in micron scales and could achieve controlled drug release for tissue engineering applications. In this study, the beads diameter of electrospun bead-on-string nanofibers was controlled by adjusting the concentration of spinning polymer, poly (lactic-co-glycolic acid) (PLGA), and the solvent ratio of chloroform to acetone. The images of the scanning electron microscopy (SEM) suggested that bead-on-string nanofibers could be successfully obtained only with a certain range of PLGA solution concentration. Moreover, with the decrease in the solvent ratio of chloroform to acetone, the range was left-shifted towards a smaller concentration. In addition, increase in the PLGA solution concentration within the range the beads diameter became greater and the shape of the beads changed from oval to slender when increasing the PLGA concentration within the range. The bead-on-string nanofibers with different beads diameter were further used to load micro-particle drugs of tetracycline hydrochloride, as a model drug, to examine the release behavior of nanofibers scaffold. The release profiles of drug loaded bead-on-string nanofibers demonstrated the possibility to alleviate the burst drug release by means of beads diameter control.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: C - Volume 74, 1 May 2017, Pages 471-477
نویسندگان
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