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 Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth.  Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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纤维素纳米晶体与阴离子块共聚合物修饰

Olga Lidia Torres-Rocha1, Julien Pinaud2, Patrick Lacroix-Desmazes2

  • 1Department of Chemical Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada.

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概括
此摘要是机器生成的。

研究人员开发了一种简单,低成本的方法,使用区块共聚物修改纤维素纳米晶体 (CNC). 这种非共价方法通过改变表面特性来提高CNC与聚合物的兼容性,克服了关键的商业化障碍.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 纳米技术纳米技术

背景情况:

  • 纤维素纳米晶体 (CNC) 具有理想的机械和光学性能,但它们的高水友性限制了与许多聚合物的兼容性.
  • 目前的共价变异方法通常是复杂和昂贵的,阻碍了商业应用.

研究的目的:

  • 开发一种简单,廉价,非共价的方法,使用块共聚物修改CNC表面.
  • 研究块共聚合物结构对CNC分散性和表面修饰的影响.

主要方法:

  • 通过氧化物介导的聚合物合成五种新的区块共聚合物,其中包括一个丁乙烯胺基胺固定块和一个非离子稳定块.
  • 对和稳定块的聚合度 (DPn) 的系统变化.
  • 在各种有机溶剂中对修改的CNC分散性的评估.

主要成果:

  • 非共价性修改有效地提高了CNC与有机溶剂的兼容性.
  • 固定块和稳定块的DPn显著影响了聚合物与CNC表面结合的量.
  • DPn也极大地影响了CNC在不同有机溶剂中的分散性.

结论:

  • 非共价块共聚物修改提供了一个简单且具有成本效益的策略,以提高CNC与聚合物的兼容性.
  • 量身定制块共聚合物的DPn提供了一个可调的方法来控制CNC表面特性和溶剂分散性.
  • 这种方法为纤维素纳米晶体的更广泛的商业利用提供了一个有希望的途径.