• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>2010 International Conference on Enabling Science and Nanotechnology >Microstructure and properties of novel optically active poly(ester-imide)/TiO2 bionanocomposites containing natural amino acids moieties
【24h】

Microstructure and properties of novel optically active poly(ester-imide)/TiO2 bionanocomposites containing natural amino acids moieties

机译：新型含天然氨基酸部分的旋光活性聚酯（酰亚胺）/ TiO 2 纳米复合材料的微观结构和性能

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Poly(ester-imide)s (PEI)s are a kind of non-vinyl polymers which can be prepared via step-growth polymerization. They contain ester and imide linkages in the polymer backbones and lately show significant applications, such as adhesives, printed circuit boards, membranes, and engineering thermoplastics [1,2]. Synthesis of chiral polymers is an important field in macromolecular science. they have attracted a large deal of interest in the applications of fields for instance drug delivery, tissue engineering, dentistry and chiral stationary phases for resolution of enantiomers in chromatographic techniques [3–4] due to their promising properties. In recent times, composites of biopolymers and bioactive inorganic materials have been extensively studied, due to a large variety of potential applications. They have been developed as bone-repairing devices because of their biocompatibility, bioactivity, and biodegradability [5]. Several recent studies have suggested that some shapes of TiO2 could act as a bioactive material in the sense that the material leads to an interfacial bonding to tissue by way of the formation of a biologically active hydroxyapatite layer on the implant surface. In this presentation I would like to show preparation of new optically active PEIs which were synthesized from the polymerization reaction of N,N′-(pyromellitoyl)-bis-L-amino acids diacid with diols using direct polymerization method. The optically active PEI/titanium dioxide (PEI/TiO2) bionanocomposites were synthesized under ultrasonic irradiation. The formation of PEI was confirmed by 1H-NMR, FT-IR, specific rotation and elemental analysis. The obtained polymers were optically active and thermally stable and due to present of amino acid group on the PEIs backbone, they could be categorized under environmentally friendly polymers The resulting bionanocomposites were characterized by FT-IR, powder X-ray diffraction (XRD), thermogravimetric analysis (TGA--) and their morphology were investigated by scanning electron microscopy (SEM), scanning electron image (SEI), and transmission electron microscopy (TEM) analyses. The TEM, SEM and SEI results indicated that the nanoparticles were dispersed homogeneously in PEI matrix on nanoscale (Figures 1 and 2).
机译：聚（酯酰亚胺）（PEI）是一种非乙烯基聚合物，可以通过逐步增长聚合反应制备。它们在聚合物主链中包含酯键和酰亚胺键，并且最近显示出重要的应用，例如粘合剂，印刷电路板，膜和工程热塑性塑料[1,2]。手性聚合物的合成是大分子科学中的重要领域。由于其有前途的特性，它们在色谱技术中分离对映异构体的药物输送，组织工程，牙科和手性固定相等领域引起了广泛的兴趣[3-4]。近年来，由于各种各样的潜在应用，已经对生物聚合物和生物活性无机材料的复合材料进行了广泛的研究。由于它们的生物相容性，生物活性和生物降解性，它们已被开发为骨修复装置[5]。最近的一些研究表明，某些形状的TiO 2 可以充当生物活性材料，因为该材料通过在生物体上形成生物活性羟基磷灰石层而导致与组织的界面键合。植入物表面。在本演讲中，我想展示制备新的旋光性PEI的方法，这些PEI是由N，N'-（均苯四甲酰基）-双-L-氨基酸二酸与二醇通过直接聚合方法进行聚合反应而合成的。在超声辐射下合成了旋光性PEI /二氧化钛（PEI / TiO 2 ）生物纳米复合材料。通过1 H-NMR，FT-IR，比旋光度和元素分析证实了PEI的形成。所得聚合物具有光学活性和热稳定性，并且由于PEIs骨架上存在氨基酸基团，因此可以归类为环境友好型聚合物。分析（TGA- -- ）及其形态通过扫描电子显微镜（SEM），扫描电子图像（SEI）和透射电子显微镜（TEM）分析进行了研究。 TEM，SEM和SEI结果表明，纳米颗粒在纳米级的PEI基质中均匀分散（图1和2）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号