RSC Advances
·
2017
·Vol. 7
·期 7
·4000-4010
·
IF 3.108
Yongjing Xu,Liming Zou,Hongwei Lu,Tingjie Kang
The selection of non-hazardous solvent systems is an important factor that can significantly influence fiber formation during polymer electrospinning. In this paper, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/polyethylene oxide (PEO) has been electrospun using different solvent systems to investigate the influence of different solution properties on nanofiber morphology and diameter, the thermal and mechanical properties, as well as the degradation kinetics of the electrospun fibers. The morphology, thermal and mechanical properties of PHBV/PEO electrospun fibers were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TG) and differential scanning calorimetry (DSC), and a universal testing machine, respectively. The results showed that the binary-solvent system (dichloromethane/ethanol DCM/EtOH) gave the finest defect-free fibers, and exhibited the best thermal and mechanical properties of all the single solvents (chloroform (CHL), dichloromethane (DCM)). Therefore, the effect of DCM/EtOH in different ratios on PHBV/PEO electrospun fibers was studied in detail. In brief, the DCM/EtOH solvent system was considered to be the best candidate for PHBV/PEO for electrospinning.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 12
·5695-5711
·
IF 2.302
Xu Yongjing,Zou Liming,Lu Hongwei,Wei Yizhi,Hua Jianbing,Chen Shuyun
Abstract
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/polyethylene oxide (PEO) mats were fabricated by electrospinning in different weight ratios (i.e., 100/0, 90/10, 80/20, 70/30, 60/40, 50/50, 0/100). In this paper, dichloromethane (DCM) has been used as potential solvent for electrospinning. In order to evaluate the influence of PEO and DCM on the final properties of PHBV mat, the following characterization techniques were employed: scanning electron microscopy, Fourier transform infrared attenuated total reflectance spectroscopy, X-ray diffraction analysis, thermogravimetric analysis, differential scanning calorimetry, and the test of mechanical properties, water contact angle, porosity analysis, swelling properties, water–vapor transmission rate (WVTR) and in vitro degradation behavior. All PHBV/PEO electrospun mats consist of randomly oriented and distinctly separated fibers. The average fiber diameters and the porosity were 738–1098 nm and 80–90 %, respectively. The water contact angle, swelling ratio, WVTR, and in vitro degradation behavior of PHBV/PEO electrospun mats were 124°–55°, 265–436 %, 1977–2610 g m −2 day −1 , and 17–50 %, respectively. Besides, the crystallinity degree of PHBV/PEO electrospun mats has decreased with the increasing of PEO content. Therefore, PEO imparted PHBV/PEO electrospun mats on better properties, improving the nature defects of PHBV. In particular, PHBV/PEO 70/30 electrospun mat with optimizing performance, was considered the best candidate for potential scaffold in skin tissue engineering.
研究领域:
材料科学
·
生物医学工程
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）