相关实验视频

Updated: Jun 4, 2025

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published on: September 19, 2020

具有不同网络结构和Si-H组分布的聚二氧化/Ag纳米复合物的热特性

Monika Wójcik-Bania¹, Edyta Stochmal²

¹Faculty of Geology, Geophysics, and Environmental Protection, AGH University of Krakow, 30-059 Kraków, Poland.

Materials (Basel, Switzerland)

|December 17, 2024

概括

聚二氧化/银纳米粒子 (Ag NP) 纳米复合材料使用现场减少进行了合成. 添加Ag NP改变了热性能和降解机制,产生了具有大量陶残留的Ag/SiOC材料.

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:

包含银纳米粒子 (Ag NPs) 的聚氧具有独特的物理化学特性.
这些纳米复合材料由于其增强的特性,对先进的材料应用具有前途.

研究的目的:

系统地研究聚氧/Ag纳米复合材料的热特性和降解机制.
探索现场结合的AgNP在热分解过程中对聚氧网络行为的影响.

主要方法:

通过水化合成聚氧矩阵的合成,然后在现场形成Ag NP.
热重力测量分析 (TGA) 与质谱学 (MS) 结合用于热性质评估.
福利埃变换红外光谱 (FTIR),拉曼光谱和X射线衍射 (XRD) 用于降解机制和材料特性.

主要成果:

引入AgNP改变了聚氧网的热性质,影响了热解过程中Si键的再分配.
FTIR分析揭示了AgNP对纳米复合材料降解途径的影响.
拉曼光谱和XRD证实了由此产生的Ag/SiOC材料中分别存在自由碳和金属银相.
在Ag/SiOC材料中获得的陶残留量在43%至84%之间.

结论:

这项研究成功地证明了制造具有可调节的热特性和降解行为的聚二氧化/Ag纳米复合材料.
这些发现为这些先进材料的热稳定性和分解机制提供了宝贵的见解.
开发的Ag/SiOC材料显示出在热要求苛刻的环境中具有高性能应用的潜力.

关键词:

纳米复合材料的使用方法聚氧化网络是多氧化网络.聚氧化类的多氧化.氧化碳化的氧化碳化银纳米颗粒的使用方法热性质热性质热性质

更多相关视频

Synthesis of Stimuli-responsive Nanogels using Aqueous One-step Crosslinking and Co-nanopolymerization

Synthesis of Stimuli-responsive Nanogels using Aqueous One-step Crosslinking and Co-nanopolymerization

Published on: January 24, 2025

Drawing and Hydrophobicity-patterning Long Polydimethylsiloxane Silicone Filaments

Drawing and Hydrophobicity-patterning Long Polydimethylsiloxane Silicone Filaments

Published on: January 7, 2019

相关概念视频

Molecular Weight of Step-Growth Polymers

Molecular Weight of Step-Growth Polymers

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...

Polymer Classification: Stereospecificity

Polymer Classification: Stereospecificity

Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...

Polymer Classification: Architecture

Polymer Classification: Architecture

Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...