Physicochemical properties and structure of starch ester/copolymer/complex synthesized by combination of microwave and acid (anhydride): A review

Wang, Wei; Hu, Aijun; Liu, Shiwei; Yan, Jiatian; Liu, Yu; Zheng, Jie

doi:10.1016/j.tifs.2023.06.033

Cited by 8 publications

(3 citation statements)

References 76 publications

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“…1) to yield esterified starch, this process involves the substitution of the hydroxyl groups of starch by an acid or an anhydride to produce esterified starch. Typically, these reactions are carried out at temperatures ranging from 50 to 90 °C, with a reaction time varying from 1 to 6 hours [30]. Utilizing either alkaline catalysts like potassium carbonate, sodium hydroxide, and sodium hydrogen phosphate, or acidic catalysts such as p-toluene sulfonic acid, hydrochloric acid, and sulfuric acid [31].…”

Section: Esterificationmentioning

confidence: 99%

A review of the chemical modification and applications of starch

El Farkhani,

Dadou,

El Miz

et al. 2024

BIO Web Conf.

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The modification of starch using esterification, etherification, oxidation, and Schiff base formation has garnered significant interest owing to its wide-ranging applications in different sectors. This overview delves into the various techniques utilized for modifying starch molecules and examines their utilization in adsorption, adhesive formulations, pharmaceuticals, nanoparticle synthesis, and film manufacturing. The article delves into the synthesis pathways associated with esterification, etherification, oxidation, and Schiff base formation, underscoring their influence on the physicochemical characteristics of starch. Furthermore, it thoroughly examines the application of modified starch in pollutant adsorption processes, as adhesive agents in industries, as excipients in pharmaceutical formulations, and as crucial elements in the creation of starch-based nanoparticles and films.

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Section: Esterificationmentioning

confidence: 99%

A review of the chemical modification and applications of starch

El Farkhani,

Dadou,

El Miz

et al. 2024

BIO Web Conf.

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show abstract

“…where W (%) is the mass fraction of ferulic acid in starch ferulate; C (mg/L) is the mass concentration of ferulic acid calculated from the standard curve; V (mL) is the volume of the extraction solution; m 0 (g) is the mass of starch ferulate; M (194. 19) is the relative molecular mass of ferulic acid; 162 (g/mol) is the molar mass of one glucose unit; and DS is the amylose substitution degree.…”

Section: Calculation Of Degree Of Substitutionmentioning

confidence: 99%

“…The samples (4 mg) were mixed with 15 µL of FITC acetone solution (0.1 mg/mL) protected from light. After 20 min, the suspension was dropped on a slide and observed at an excitation wavelength of 498 nm and an emission wavelength of 517 nm [19].…”

Section: Confocal Laser Scanning Microscopy (Clsm) Analysismentioning

confidence: 99%

Unveiling Optimal Synthesis and Structural Insights of Starch Ferulate via the Mechanoenzymatic Method

Liu,

Gao,

Xin

et al. 2023

Foods

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In this study, starch ferulate was synthesized employing a mechanoenzymatic method, specifically based on the twin screw extrusion technique and lipase catalysis. The research then primarily centered on optimizing process parameters and conducting structural analysis. Optimal conditions were determined to be 8.2% ferulic acid addition, 66 °C extrusion temperature, and 3.2% lipase (N435) addition. The enzyme-catalyzed time was 30 s. The degree of substitution for starch ferulate was quantified at 0.005581 under these specific conditions. The presence of C=O bonds in the synthesized starch ferulate proved that the synthesis process was efficient. Additionally, the crystal structure underwent reconstruction. Observations through Scanning Electron Microscopy (SEM) and Confocal Laser Scanning Microscopy (CLSM) demonstrated that the mechanoenzymatic method led to an augmentation in the specific surface area of starch molecules, thereby facilitating the exposure of active sites. This breakthrough underscores the vast potential of mechanoenzymatic techniques to revolutionize the rapid and sustainable synthesis of starch ferulate, marking a pioneering stride in ester synthesis. The insights garnered from this study transcend theory, offering a visionary roadmap for the development and real-world deployment of advanced modified starch esters.

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Effects of different pretreatment methods on the degree of substitution, structure, and physicochemical properties of synthesized malic acid sweet potato starch ester

Wang,

Liu,

et al. 2024

J Sci Food Agric

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BACKGROUNDThe preparation of malic acid starch ester (MSE) is mostly carried out using a high temperature method, but there are problems such as high energy consumption, long preparation time, and uneven heating. Microwave technology can be used to overcome these limitations. The semi‐crystalline structure of starch granules hinders the modifier's access to the matrix, thus limiting the esterification reaction. Physical techniques can act on the interior of the starch to create a number of active sites, thereby facilitating the reaction of the starch with esterification reagents. Therefore, this study investigated the effect of starch pretreatment by microwave, heat‐moisture, and ultrasonic techniques on the degree of substitution (DS), structure, and physicochemical properties of MSE synthesized by the microwave method.RESULTSThe DS of MSE was increased after pretreatments. The modified starch obtained by different pretreatment methods did not show new characteristic peaks, while the MSE synthesized showed new absorption peaks near 1735 cm−1. The granular structure and morphology of the modified starch obtained by microwave and heat‐moisture pretreatment were gelatinized and aggregated, while some of the starch particles of the modified starch obtained by ultrasonic pretreatment appeared pore‐sized. The relative crystallinity and gelatinization enthalpy of the MSE were reduced, but the crystallization pattern remained as A‐type.CONCLUSIONOverall, the results suggest that various pretreatment methods can enhance the DS of MSE by disrupting the structure of starch. The findings of this study provide theoretical support for improving the DS of esterified starch. © 2024 Society of Chemical Industry.

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Physicochemical properties and structure of starch ester/copolymer/complex synthesized by combination of microwave and acid (anhydride): A review

Cited by 8 publications

References 76 publications

A review of the chemical modification and applications of starch

A review of the chemical modification and applications of starch

Unveiling Optimal Synthesis and Structural Insights of Starch Ferulate via the Mechanoenzymatic Method

Effects of different pretreatment methods on the degree of substitution, structure, and physicochemical properties of synthesized malic acid sweet potato starch ester

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