2013年6月4日 · The crosslinked thiolated PVA (TPVA) hydrogels were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and Fourier transform infra red spectroscopy coupled with thermal analysis (TG-FTIR) techniques.

2022年8月15日 · In this study, we report the design and development of a FGM based on thiolated poly (vinyl alcohol) (TPVA) and nano-hydroxyapatite (nano-HA) with graded bioactivity, cell compatibility, and degradability properties that are conducive for bone regeneration.

XRD analysis showed that the degree of crystallinity of the PVA/IL composites had a decreasing trend with an increase of IL. TGA showed that IL could effectively improve the thermal stability of...

Download scientific diagram | XRD spectra of poly(vinyl alcohol) (PVA), thiolated poly(vinyl alcohol) (TPVA), and thiolated PVA-HA composite (TPVA-HA). from publication: Functionally Graded...

2020年7月5日 · Specifically, the thiol-terminated PVA (TPVA) precursor together with methacrylated PVA has been chosen to form thiol-acrylate PVA hydrogels by the photopolymerization approach (Scheme 1). In this system, the introduction of TPVA with abundant hydrophilic OH groups can bring about the raise of the hydrophilicity to balance hydrophobicity ...

Transmission-FTIR spectra of PVA and TPVA were recorded using a spectrometer (Nicolet iS50, Thermo Fisher Scientific, Shanghai, China) in the spectral range from 400 to 4000 cm −1 based on 30 scans. X-ray diffraction (XRD) measurements were carried out on a D8 Discover X-ray diffractometer (Bruker, Billerica, MA, USA) using Cu–Ka radiation.

2004年2月10日 · The structure of physical poly (vinyl alcohol) (PVA) hydrogels prepared by subjecting a PVA/D 2 O solution (11% w/w PVA) to freeze (−22 °C)/thaw (+25 °C) cycles has …

2013年6月4日 · 交联的硫醇化 PVA (TPVA) 水凝胶通过热重分析 (TGA)、差示扫描量热法 (DSC)、X 射线衍射 (XRD) 和傅里叶变换红外光谱结合热分析 (TG-FTIR) 技术进行表征。 所得材料的交联使用三种交联剂三偏磷酸钠 (STMP)、乙二醛和硼酸进行。 研究了酯化和交联对材料理化性能的影响。 XRD 表明交联后TPVA 水凝胶的结晶度降低。 DSC 观察进一步证实了这些结果。 TPVA 水凝胶的热稳定性得到增强。 对于具有不同TG1A浓度和不同交联剂的不同STMP交联样品，观察 …

2024年12月12日 · 结合xrd和dsc分析结果可知，双向拉伸使tpva分子链的聚集态结构发生变化，结构规整性和分子链堆积密度增加，结晶度和平均晶粒尺寸随之增大，从而使氧气在薄膜中的扩散变得困难[18]，加之增塑剂难以进入分子链排列紧密的结晶区[19]，必须绕过晶粒，使得薄膜 ...

The broad peaks observed in the XRD pattern around 10° of 2θ indicate the average intermolecular distance of the amorphous part, and small peaks are centered at around 20° of 2θ [22].