Understanding and applications of collison-induced chemistry with hyperthermal hydrogen and inert gas

高温氢气和惰性气体碰撞诱导化学的理解和应用

• 批准号: 327221-2009
• 负责人: Lau, Leo
• 金额: $ 3.64万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=457817
• 关键词: Understanding; applications; collison; induced; chemistry

This proposal aims at further lifting the scientific understanding and technological impact of our research in novel chemistry induced by hyperthermal collision. Since 2004, we have shown with many examples that when adsorbed organic precursor molecules are bombarded by 5-10eV protons, generally only their C-H bonds are cleaved because the kinetic energy transfer is merely effective in H---H collisions. The recombination of the carbon radicals leads to cross-linking the molecules into a stable molecular network having the desirable chemical functionalities of the precursor. A "green" technology requiring little chemical reagents other than hydrogen is thus invented to produce a cross-linked molecular film with tailor-made properties for surface modification or membrane applications. In 2008, we successfully developed a production prototype reactor to show that neutral hyperthermal molecular hydrogen can be generated to replace protons, for surface modification of electrically insulating substrates such as polymers or biomaterials. Grafting molecules with desirable chemical/biochemical properties on a polymer in a large area (>300 cm2) with a high throughput (< 1 second of exposure time) has indeed been demonstrated. Technology commercialization is under way.

该提案旨在进一步提升我们对超热碰撞引发的新化学研究的科学认识和技术影响。自2004年以来，我们已经用许多例子表明，当吸附的有机前体分子被5- 10 eV的质子轰击时，通常只有它们的C-H键被裂解，因为动能转移仅在H-H碰撞中有效。碳自由基的重组导致分子交联成具有前体的所需化学官能团的稳定分子网络。因此，发明了一种“绿色”技术，该技术需要很少的除氢以外的化学试剂来生产具有针对表面改性或膜应用的定制性质的交联分子膜。2008年，我们成功开发了一个生产原型反应堆，表明可以产生中性超高温分子氢来取代质子，用于聚合物或生物材料等电绝缘基材的表面改性。确实已经证明了在大面积（>300 cm 2）中以高通量（< 1秒的暴露时间）将具有期望的化学/生物化学性质的分子接枝到聚合物上。技术商业化正在进行中。