基于迪瓦尼林聚胺的具有可定制材料特性的共价适应性网络
Noé Fanjul-Mosteirín1, Karin Odelius1
1Wallenberg Wood Science Center, WWSC, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
Biomacromolecules
|March 18, 2024
概括
新的共价适应性网络 (CAN) 提供了一种可持续的替代热固体. 这些基于聚胺的材料是可再加工和化学回收的,保持强大的机械性能.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 可持续化学 可持续化学
背景情况:
- 热提供了高的机械和化学强度,但不能再加工.
- 共价适应性网络 (CAN) 旨在将热性质与再加工能力相结合.
- 开发可持续的替代品以化石为基础的热是至关重要的.
研究的目的:
- 设计和合成基于高可再生能源的新型聚胺共价适应性网络 (CAN).
- 调查结构-属性关系,并定制这些CAN的热力学性能.
- 评估开发的CANs的再加工和化学回收潜力.
主要方法:
- 合成基于聚胺的CANs,使用二瓦尼林衍生物和基于亚利法性脂肪酸的氨基.
- 热力学性能的表征,包括拉伸强度和玻璃过渡温度.
- 通过单体回收对再加工周期和化学回收进行评估.
主要成果:
- 具有不同比例的柔性和刚性氨基的CAN表现出可调整的拉伸强度 (1.07-18.7 MPa) 和玻璃过渡温度 (16-61 °C).
- 合成的CANs表现出由于可逆性 imine 功能的快速应激放松.
- 材料成功地重新处理了多达三次,没有显著的性能损失,并通过化学回收来回收迪瓦尼林单体.
结论:
- 具有高可再生能源含量的聚胺基CAN为传统热提供了一个有希望的,可持续的替代方案.
- 这些材料的再加工和化学回收的能力解决了聚合物生命周期结束的担忧.
- 这些可适应的网络为具有可调节性质的环保材料铺平了道路.
更多相关视频
09:12Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
Published on: June 1, 2016
9.2K
11:09Grafting Multiwalled Carbon Nanotubes with Polystyrene to Enable Self-Assembly and Anisotropic Patchiness
Published on: April 1, 2018
8.1K
相关概念视频
02:18Network Covalent Solids
13.5K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
13.5K
01:10Polymers: Molecular Weight Distribution
3.4K
For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
3.4K
01:20Types of Step-Growth Polymers: Polyesters
2.2K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.2K