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相关概念视频

Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
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对于塑料替代品的固体生物基泡的加速设计

Isaac Y Miranda-Valdez1, Tero Mäkinen1, Sebastian Coffeng1

  • 1Department of Applied Physics, Aalto University, P.O. Box 15600, 00076 Aalto, Espoo, Finland. isaac.mirandavaldez@aalto.fi.

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概括

研究人员优化了生物基甲基纤维纤维泡以替代塑料. 贝叶斯优化确定了强大的闭细胞泡和强大的纤维网络的组成,使可持续材料的合理设计成为可能.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 生物技术是生物技术.
  • 可持续的高分子.

背景情况:

  • 生物基材料对于替代传统塑料至关重要.
  • 设计具有定制机械性能的生物基材料仍然是一个重大挑战.
  • 甲基纤维复合材料为可持续材料开发提供了一个有希望的途径.

研究的目的:

  • 优化全生物基甲基纤维纤维复合泡的机械性能.
  • 通过将加工,结构和特性联系起来,建立生物基材料的合理设计方法.
  • 为了证明优化方法的可转移性到其他生物基泡配方.

主要方法:

  • 利用贝叶斯优化与高斯过程回归来将材料组成映射到机械性能.
  • 运用液体生物纤维悬浮液体的气质特性作为泡设计的快速测量描述符.
  • 分析了用于高效材料设计的质性质的低维子空间.

主要成果:

  • 确定了甲基纤维纤维泡的两个最佳成分:高甲基纤维素强密细胞泡,高纤维含量甲基纤维素结合纤维网络.
  • 证明了质性质可以有效预测最终泡的机械性质.
  • 验证了生物基固体泡合理设计的方法.

结论:

  • 一种新的贝叶斯优化方法使生物基泡的合理设计能够具有所需的机械性能.
  • 该方法允许创建适合作为塑料替代品的甲基纤维素纤维泡.
  • 开发的方法可应用于更广泛的生物基泡成分.