聚乙烯@二氧化的复合颗粒
Hanan Sertchook1, Hila Elimelech, Carina Makarov
1Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Journal of the American Chemical Society
|January 4, 2007
概括
研究人员开发了一种新的方法来制造物理互穿的聚乙烯 (PE) 和纳米复合材料. 这一突破使这些常见聚合物的纳米混合成为可能,克服了复合材料科学中以前的挑战.
科学领域:
- 聚合物科学和纳米技术
- 材料化学 材料化学
背景情况:
- 聚乙烯 (PE) 和二氧化分别是基本的有机和无机聚合物.
- 在纳米尺度上创建物理透的纳米复合材料一直是一个重大挑战.
- 现有的聚合物-复合材料往往缺乏真正的纳米物理混合.
研究的目的:
- 开发一种用于制备物理互穿的聚乙烯-二氧化纳米复合材料的新方法.
- 为了实现聚乙烯和的纳米物理混合.
- 详细说明了亚微米PE@颗粒的制备过程.
主要方法:
- 采用四甲氧化 (TEOS) 的sol-gel多凝聚工艺来捕获溶解的聚乙烯.
- 在高温下使用了TEOS溶解PE的乳液滴.
- 确定并使用特定的表面活性剂 (PE-b-PEG) 来稳定乳液并增强PE溶解.
- 通过使用TEM,SEM,表面积分析,TGA/DTA,DSC,SAXS和固态NMR光谱学来表征得到的纳米复合材料.
主要成果:
- 成功制备了低密度PE@silica和高密度PE@silica的亚微粒.
- 展示了一种方法来实现PE和的纳米物理混合.
- 基于广泛的分析,提出了复合粒子的形成机制和内部结构.
- 表面活性剂PE-b-PEG对于稳定乳液和溶解PE至关重要.
结论:
- 已经建立了一种创造物理互穿的PE-纳米复合材料的新方法.
- 这项工作克服了PE和的纳米物理混合的挑战.
- 开发的技术为具有可调节性质的新型复合材料设计提供了一条途径.
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