作为水体的深层欧特基溶剂前体的作用:揭示增强强电力酸溶解的协同作用/对抗作用
Filipe H B Sosa1, Dinis O Abranches1, André M da Costa Lopes1,2
1CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
ACS sustainable chemistry & engineering
|June 14, 2024
概括
深度浸泡溶剂 (DESs) 通过利用水物有效地溶解卡夫. 溶解度与酒精基链长度相关,其中1,4-butanediol显示最大增强.
科学领域:
- 绿色化学 绿色化学
- 生物质的价值化 生物质的价值化
- 材料科学 材料科学 材料科学
背景情况:
- 复杂的芳香聚合物lignin是化学品和材料的有前途的原料.
- 有效的素溶解对于其工业利用至关重要.
- 含有深溶性溶剂 (DES) 的水类物质增强了素的水溶性.
研究的目的:
- 调查键接受器 (HBA) 和键捐赠器 (HBD) 在DES中对素溶解的作用.
- 探索不同酒精基链长度对素溶解性的影响.
- 为了阐明在水性DES混合物中的素溶解机制.
主要方法:
- 研究了六种不同的酒精 (从甘油到1,6-hexanediol) 和化作为水.
- 评估了 Kraft 素在水性介质中的可溶性增强,其中含有不同的水组合物.
- 分析了水结构和素溶解度之间的关系.
主要成果:
- 观察到酒精基链长度与素可溶性增强之间的相关性.
- 1,4-butanediol显示出由于最大化溶解物-水基聚合物,具有最高的溶解性增强.
- 在稀释区域,DES的热效应具有添加性,但在缩区域,它有利于纯成分.
结论:
- 特别是那些具有优化HBA/HBD组合和链长度的DES,对于素溶解是有效的.
- 了解水 - 质素相互作用是优化生物质加工的关键.
- 这项研究提供了关于调整DES特性以实现高效的素增值的见解.
相关概念视频
01:08Sample Preparation for Analysis: Advanced Techniques
321
Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
321
02:29Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis
10.3K
Overview
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
10.3K
01:15Hydrolysis
104.9K
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
104.9K
01:12Precipitation Processes
442
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
442