相关实验视频

Updated: Jun 21, 2026

A Freeze-Thawing Method to Prepare Chitosan-Polyvinyl alcohol Hydrogels Without Crosslinking Agents and Diflunisal Release Studies

A Freeze-Thawing Method to Prepare Chitosan-Polyvinyl alcohol Hydrogels Without Crosslinking Agents and Diflunisal Release Studies

Published on: January 14, 2020

在微波的帮助下,基在氨基酸基础上的深度阳性溶剂中的快速溶解

Jiake Wang^1,2, Chao Qin¹, Bingxia Xu¹

¹Key Laboratory of Anhui for Tobacco Chemistry, Tianda Road 9, Hefei, Anhui, 230088, China.

Macromolecular rapid communications

|November 8, 2024

概括

这项研究引入了一种绿色溶剂系统,使用含氨基酸和1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) 的深溶性溶剂 (DES),以快速溶解. 与传统方法相比,微波辅助显著减少了处理时间.

科学领域:

材料科学材料科学材料科学
绿色化学绿色化学
生物聚合物加工生物聚合物加工

背景情况:

基的高晶度和结合使其在常规溶剂中难以溶解.
现有的基溶剂往往具有毒性,效率低,成本高,需要更绿色的替代品.

研究的目的:

开发一种高效,快速的绿色溶剂系统,用于素溶解.
为了研究在新型溶剂系统中素溶解的机制.
为了证明开发的溶剂的可回收性.

主要方法:

制备一个三元的深溶解溶剂 (DES),包括氨基酸,尿素和1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU).
在准备好的DES中微波辅助素的溶解.
使用里叶变换红外光谱 (FT-IR),X射线衍射 (XRD),风湿学和光学显微镜,对溶解的基进行表征.

主要成果:

奇在3-10分钟内在DES/微波系统中迅速溶解,比传统加热 (6-8小时) 显著改善.
鉴定证实了基的成功溶解,并揭示了一种机制,涉及氨基酸和DBU的协同破坏基的键网络.
该DES表现出极好的可回收性,并在回收后保留了其素溶解能力.

结论:

一个新的,高效的,绿色的微波辅助DES系统有效地溶解了基.
开发的方法提供了一种快速且环保的基加工方法.
由于DES溶剂的可回收性质,提高了其可持续性和酸应用的经济可行性.

关键词:

氨基酸是氨基酸中的一种.奇丁丁是一种.深层欧性溶剂 (DES) 的使用微波炉微波炉微波炉微波炉微波炉的作用是什么?微波炉微波炉微波炉的作用是什么?溶剂溶剂的使用方法

更多相关视频

Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues

Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues

Published on: March 9, 2021

Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper

Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper

Published on: February 27, 2021

相关概念视频

Weak Base Solutions

Weak Base Solutions

Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...

Leveling Effect and Non-Aqueous Acid-Base Solutions

Leveling Effect and Non-Aqueous Acid-Base Solutions

This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):

Basicity of Heterocyclic Aromatic Amines

Basicity of Heterocyclic Aromatic Amines

Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).

Leveling Effect

Leveling Effect

In acid-base chemistry, the leveling effect refers to the limitation imposed by the solvent on the strength of acids and bases in solution. When a base stronger than the solvent's conjugate base is used, it deprotonates the solvent until the base is entirely consumed, making it ineffective against weaker acids. Conversely, an acid stronger than the solvent's conjugate acid protonates the solvent until the acid is depleted, rendering it ineffective against weaker bases. Essentially, the solvent...