Green starch conversions: Studies on starch acetylation in densified CO2

Muljana, Henky; Picchioni, Francesco; Heeres, Hero J.; Janssen, Ljj Jos

doi:10.1016/j.carbpol.2010.05.032

Cited by 32 publications

(22 citation statements)

References 32 publications

(47 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The form and intensity of the signals according to the ATR–FTIR, NMR, and XRD results are characteristic of banana starch . Thus, it was concluded that banana starch was successfully obtained.…”

Section: Methodsmentioning

confidence: 87%

Chemical modification of banana starch by the in situ polymerization of ϵ-caprolactone in one step

et al. 2016

View full text Add to dashboard Cite

The chemical modification of starch from physiologically immature bananas (Musa paradisiaca L.) was performed via the in situ polymerization of ϵ‐caprolactone (CL) utilizing ammonium decamolybdate as a catalyst to obtain a starch‐g‐PCL copolymer in one step. The copolymerization conditions were studied by varying the CL/catalyst mass ratio, the reaction temperature, and the reaction time. The final product was characterized using different technical instruments to demonstrate copolymerization. Based on the results, the graft copolymer was successfully synthesized, and the mass yield reached 85.2% at a temperature of 110°C with a DPn(NMR) of 10 and a Mn(NMR) of 1141 Da. The monomer conversion to copolymer followed a power‐law model with a reaction order of 3/2. The thermal properties and crystallinity of the starch and polycaprolactone in the copolymer were affected due to the formation of starch‐g‐PCL clusters.

show abstract

Section: Methodsmentioning

confidence: 87%

Chemical modification of banana starch by the in situ polymerization of ϵ-caprolactone in one step

et al. 2016

View full text Add to dashboard Cite

show abstract

“…It proved that the numbers of the OH groups of amylose were reduced by the separation and acetylation. The stretching vibration of the C‐H bond of HACS at the wave number 2930 cm −1 (Muljana, Picchioni, Heeres, & Janssen, ) was also different from amylose, AA in peak intensity, that is, the peak intensity of the C‐H bond of HACS was also obviously stronger than that of amylose and AA. The stretching vibration peak of the C‐C and C‐O bonds of amylose and AA at wave number 1150 cm −1 (Mahmoudi Najafi, Baghaie, & Ashori, ) became weak too, compared with HACS.…”

Section: Optimization Of Technology Parametersmentioning

confidence: 99%

Amylose: Acetylation, Optimization, and Characterization

Tang

Fan

et al. 2019

Journal of Food Science

View full text Add to dashboard Cite

Amylose, as a polymeric carbohydrate, is a very attractive raw material owing to its performances. However, the acetylation of amylose separated from high amylose corn starch (HACS) will be beneficial to further improve its functional characteristics so that acetylated amylose (AA) is able to be well applied for some special situations. In this work, we chiefly discuss the optimization of acetylation conditions by a response surface methodology, property, and characterization of AA. The experimental results indicated that the acetylation of amylose was affected by some factors, such as reaction temperature, reaction time, amount of acetic anhydride, and pH. The blue value of amylose was changed by acetylation. Maltese crosses on the separated amylose particles disappeared owing to the separation. The crystalline structure of HACS was C‐type, whereas the structure of AA was the immediate between B‐ and V‐type. The acetylation lowered the onset temperature, peak temperature, and end temperature of amylose, but raised its melting enthalpy. Practical Application Although inherent functional diversity of starch extracted from different biological sources adds to the range of applications, acetylated amylose, as an additive, will be better control the consistency and texture of some foods, enhance the strength of edible films, and improve the slow‐release of drugs. It will also provide options for extending the scope of desired functional characteristics.

show abstract

“…Several studies demonstrated great potential of scCO 2 as a solvent for the catalyzed synthesis of the fatty acid starch esters and starch acetylation . Degree of substitution (DS = 0.1–0.31) in the case of scCO 2 ‐aided synthesis of the fatty acid/PS esters was shown to be depended on applied pressure and temperature, type of basic catalysts, and fatty acid derivatives .…”

Section: Scco2‐assisted Chemical Modification Of Starchmentioning

confidence: 99%

“…Starch‐acetates are traditionally produced in a reaction of native starch with an acetate source such as Ac 2 O in water . A high water content used to prevent mixing problems in the reactor negatively affects reaction selectivity toward the desired starch acetate product (S SA ) due to the simultaneous hydrolysis of acetic anhydride to acetic acid . Organic solvents, such as pyridine and DMSO used to improve selectivity, have negative impact on the environment and safety of the end‐product .…”

Section: Scco2‐assisted Chemical Modification Of Starchmentioning

confidence: 99%

“…A high water content used to prevent mixing problems in the reactor negatively affects reaction selectivity toward the desired starch acetate product (S SA ) due to the simultaneous hydrolysis of acetic anhydride to acetic acid . Organic solvents, such as pyridine and DMSO used to improve selectivity, have negative impact on the environment and safety of the end‐product . Sub‐ and supercritical CO 2 ‐assisted starch acetylation has been recently proposed to overcome aforementioned problems .…”

Section: Scco2‐assisted Chemical Modification Of Starchmentioning

confidence: 99%

See 1 more Smart Citation

Utilization of supercritical CO₂as a processing aid in setting functionality of starch-based materials

2016

View full text Add to dashboard Cite

Modification of native starch enables fabrication of a broad spectrum of technologically valuable products for food and non-food applications. Given the increased public concern about food safety and rigorous environmental regulations, a special attention is paid to non-thermal and organic solvent-free treatments of the starch-based materials. Supercritical carbon dioxide (scCO 2 ) is considered to be an attractive processing aid for starch modification due to its unique physicochemical properties such as low viscosity, absence of surface tension, high diffusivity, tuneable density and controllable solvent strength, low critical parameters (7.38 MPa, 31.1°C), availability, and environmental acceptability. This is the first review on different use of scCO 2 as a processing aid in setting functionality of starch-based materials including scCO 2 -assisted gelatinization, fabrication of porous materials, impregnation, and chemical modification. In these processes, scCO 2 is used as a plasticizer, blowing agent, solvent, medium or anti-solvent to alter structural, and/or physicochemical properties of starch. The advantages of the scCO 2 -assisted processes for starch modification over the corresponding conventional techniques were discussed in detail.

show abstract

Green starch conversions: Studies on starch acetylation in densified CO2

Cited by 32 publications

References 32 publications

Chemical modification of banana starch by the in situ polymerization of ϵ-caprolactone in one step

Chemical modification of banana starch by the in situ polymerization of ϵ-caprolactone in one step

Amylose: Acetylation, Optimization, and Characterization

Utilization of supercritical CO₂as a processing aid in setting functionality of starch-based materials

Contact Info

Product

Resources

About

Green starch conversions: Studies on starch acetylation in densified CO2

Cited by 32 publications

References 32 publications

Chemical modification of banana starch by the in situ polymerization of ϵ-caprolactone in one step

Chemical modification of banana starch by the in situ polymerization of ϵ-caprolactone in one step

Amylose: Acetylation, Optimization, and Characterization

Utilization of supercritical CO2as a processing aid in setting functionality of starch-based materials

Contact Info

Product

Resources

About

Utilization of supercritical CO₂as a processing aid in setting functionality of starch-based materials