相关实验视频

Updated: Jul 22, 2025

Functionalization and Dispersion of Carbon Nanomaterials Using an Environmentally Friendly Ultrasonicated Ozonolysis Process

Functionalization and Dispersion of Carbon Nanomaterials Using an Environmentally Friendly Ultrasonicated Ozonolysis Process

Published on: May 30, 2017

使用氧化物来增强碳纤维界面粘附性,并作为"移植到"表面修饰策略的

Daniel J Eyckens¹, Jacqui L Adcock², James P Blinco³

¹CSIRO Manufacturing, Clayton, VIC, 3168, Australia.

Macromolecular rapid communications

|July 20, 2023

概括

用氧化物组对碳纤维的表面修改增强了拉伸强度和模量等机械性能. 聚合物接种提高了纤维强度,但与小分子相比,在环氧中表现出较少的界面剪切强度增强.

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
表面工程是什么?表面工程是什么?

背景情况:

碳纤维是复合材料中重要的增强材料.
表面修改是改善纤维矩阵粘附和复合材料性能的关键.
氧化物组为表面功能化提供了多功能定点.

研究的目的:

使用"移植到"策略将碳纤维与氧化物组和接种聚合物功能化.
评估聚合物接种对碳纤维机械性能的影响.
在环氧基质中评估改性碳纤维的界面切割强度.

主要方法:

在碳纤维上对氧化物组进行共价接种.
添加了TEMPO终结的聚 ((n-丁烯酸盐) 和聚烯.
改性纤维的拉伸强度和模量测试.
在环氧矩阵中测量界面切割强度.
分子动力学模拟以探测接口行为.

主要成果:

表面修改提高了拉伸强度高达18%,Young的模量高达12%.
在环氧的界面切割强度提高了高达144%的小分子修饰.
与小分子修饰相比,聚合物移植表面显示较低的界面切割强度增加.
分子动力学模拟显示了聚合物移植表面的不兼容性问题.

结论:

用氧化物组进行表面功能化,有效地增强碳纤维的机械性能.
聚合物接种可以改善纤维的内在特性,但可能会因为不兼容性而限制界面粘附.
小分子表面修饰似乎更有效地提高了环氧复合材料的界面剪切强度.
接口设计对于优化复合材料性能至关重要,考虑到纤维特性和矩阵相互作用.

关键词:

碳纤维碳纤维的使用电化学电化学电化学亚氧化物亚氧化物聚合聚合的过程中.表面的修改表面的修改

更多相关视频

Grafting Multiwalled Carbon Nanotubes with Polystyrene to Enable Self-Assembly and Anisotropic Patchiness

Grafting Multiwalled Carbon Nanotubes with Polystyrene to Enable Self-Assembly and Anisotropic Patchiness

Published on: April 1, 2018

Synthesis and Functionalization of Nitrogen-doped Carbon Nanotube Cups with Gold Nanoparticles as Cork Stoppers

Synthesis and Functionalization of Nitrogen-doped Carbon Nanotube Cups with Gold Nanoparticles as Cork Stoppers

Published on: May 13, 2013

相关概念视频

Nucleophilic Addition to the Carbonyl Group: General Mechanism

Nucleophilic Addition to the Carbonyl Group: General Mechanism

The carbonyl carbon in an aldehyde or ketone is the site of a nucleophilic attack due to its electron-deficient nature. Depending on the strength of the incoming nucleophile, the reaction occurs via different mechanistic pathways.
A stronger nucleophile can directly attack the electrophilic center, the carbonyl carbon. The HOMO orbital of the nucleophile interacts with the LUMO (π* antibonding) orbital present on the carbonyl carbon. This interaction breaks the π bond and shifts the...

Anionic Chain-Growth Polymerization: Overview

Anionic Chain-Growth Polymerization: Overview

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,...