完全生物基的环氧树脂来自素和环氧化大豆油:刚性-柔性,可调节性质和高素含量
Xiang Zhen1, Xuelu Cui2, Akram Ali Nasser Mansoor Al-Haimi3
1School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, PR China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China.
International journal of biological macromolecules
|November 5, 2023
概括
用油无水化物修改的技术素增强了氧化大豆油 (ESO) 热. 这种生物基硬化剂提高了热力学性能,提高了拉伸强度和形状记忆性能,用于先进的聚合物应用.
科学领域:
- 聚合物科学与工程 聚合物科学与工程
- 材料科学 材料科学 材料科学
- 生物材料是一种生物材料.
背景情况:
- 氧化大豆油 (ESO) 热由于热力学性能差,限制了它们的应用.
- 技术性素是一种生物基聚合物,为材料增强提供了机会.
- 开发可持续的高性能耐热聚合物是一个关键的研究领域.
研究的目的:
- 改进氧化大豆油 (ESO) 热的热力学性能.
- 调查改性技术素作为ESO的生物基硬化剂的潜力.
- 评估红素含量对ESO热的动态机械和形状记忆性能的影响.
主要方法:
- 用油无水化物对技术性素进行修改.
- 在氧化大豆油 (ESO) 配方中加入改性素作为硬化剂.
- 热力学性能的表征,包括抗拉强度,破裂时的延长,玻璃过渡温度和形状记忆行为.
- 对热稳定性和燃烧效率的分析.
主要成果:
- 改性技术素显著提高了ESO热的抗拉强度 (从2.8 MPa提高到34.0 MPa).
- 添加素改善了玻璃过渡温度 (从16.9°C到118.6°C) 和形状记忆特性 (固定和恢复比率).
- 增加的素含量导致由于受限的细分放松导致更高的激活能量,而热稳定性下降,但炭产量有所改善.
结论:
- 改性技术素作为一种有效的生物基硬化剂,用于氧化大豆油 (ESO) 热.
- 素的结合大大提高了ESO基材料的热力学和形状记忆性能.
- 技术性素作为一种可持续的替代固化剂,有望成为开发高性能热固化聚合物的替代固化剂.
相关概念视频
01:21Wood Products
87
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
87
03:00Preparation of Epoxides
7.8K
Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...
7.8K
02:26Base-Catalyzed Ring-Opening of Epoxides
8.6K
Due to their highly strained structures, epoxides can readily undergo ring-opening reactions through nucleophilic substitution, either in the presence of an acid or a base. The nucleophilic substitution reactions in the presence of acid are called acid-catalyzed ring-opening reactions, and nucleophilic substitution reactions in the presence of a base are called base-catalyzed ring-opening reactions. Epoxides undergo base-catalyzed ring-opening reactions in the presence of a strong nucleophile...
8.6K
02:38Structure and Nomenclature of Epoxides
6.5K
Cyclic ethers are heterocyclic compounds with an oxygen atom in the ring along with carbon atoms. They are named depending on the number of carbon atoms present in their ring system. Cyclic ethers with a three-membered ring system are called “oxirane”, four-membered ring systems as “oxetane”, five-membered ring systems as “oxolane”, and six-membered ring systems as “oxane”. The cyclic structure of these rings imposes angle strain, and this strain...
6.5K