Related Experiment Video
Updated: Aug 16, 2025
10:42
Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
18.2K
Dissolution behaviour of corn starch with different amylose content in ionic liquids
Dan Chen1, Zhe Zhao1, Yingying Wu1
1State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, China.
International Journal of Biological Macromolecules
|December 19, 2022
Summary
Waxy corn starch (WCS) dissolves fastest in ionic liquids, but experiences the most structural damage. Dissolution-regeneration alters starch crystallinity, improving thermal stability, with [AMIM]Cl showing better dissolution capabilities.
Area of Science:
- Biochemistry
- Materials Science
- Polymer Chemistry
Background:
- Corn starch (CS), high amylose corn starch (HACS), and waxy corn starch (WCS) possess distinct amylose contents influencing their properties.
- Ionic liquids (ILs) like 1-allyl-3-methylimidazolium chloride ([AMIM]Cl) and 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) are explored as solvents for biopolymers.
Purpose of the Study:
- To investigate the dissolution behavior of CS, HACS, and WCS in [AMIM]Cl and [BMIM]Cl.
- To analyze the structural and thermal properties of regenerated starches after dissolution.
- To compare the efficacy of [AMIM]Cl and [BMIM]Cl in starch dissolution and assess the impact on starch structure.
Main Methods:
- Comparative analysis of starch dissolution states in two different ionic liquids.
- Characterization of structural properties (crystallinity) of native and regenerated starches.
- Thermal analysis (e.g., DSC, TGA) to evaluate changes in thermal stability.
Main Results:
- WCS, with the lowest amylose content, exhibited the fastest dissolution rate but also the most significant structural damage and lowest solubility.
- Dissolution-regeneration in ILs transformed the A-type crystalline structure of WCS and CS into an amorphous state.
- The B-type crystalline structure of HACS converted to an ordered V-shaped structure, and overall thermal stability of starch improved post-treatment.
- [AMIM]Cl demonstrated superior starch dissolution capability with less structural damage compared to [BMIM]Cl.
Conclusions:
- The amylose content of corn starch significantly impacts its dissolution kinetics and structural integrity in ionic liquids.
- Ionic liquid-mediated dissolution-regeneration is an effective method for modifying starch crystallinity and enhancing its thermal stability.
- [AMIM]Cl is a more suitable ionic liquid for dissolving starch with minimal structural degradation.
Related Concept Videos
02:55Solubility of Ionic Compounds
63.7K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
63.7K
02:28Intermolecular Forces in Solutions
34.3K
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
34.3K
02:16Solution Formation
32.3K
There is no one solvent that can dissolve every type of solute. Some substances that readily dissolve in a certain solvent might be insoluble in a different solvent. A simple way to predict which substances dissolve in which solvent is the phrase "like dissolves like". This means that polar substances, such as salt and sugar, dissolve in a polar substance like water. In contrast, non-polar substances are more soluble in non-polar solvents such as carbon tetrachloride.
This selective...
This selective...
32.3K
01:23Factors Affecting Dissolution: Particle Size and Effective Surface Area
932
Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are...
932
01:21Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism
366
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
366
03:13Intermolecular Forces
59.0K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
59.0K