Cross-linking of starch with 1, 2, 3, 4-diepoxybutane or 1, 2, 7, 8-diepoxyoctane

Simkovic, I; Hricovíni, Miloš; Mendichi, Raniero; Soest, J.J.G. van

doi:10.1016/j.carbpol.2003.10.002

Cited by 24 publications

(3 citation statements)

References 15 publications

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“…Starch and starch products have been cross-linked with cross-linking agents, such as phosphorus oxychloride, sodium trimetaphosphate, sodium tripolyphosphate, epichlorohydrin, and 1,2,3,4-diepoxybutane, to improve the mechanical properties and water stability of starch products (Hirsch and Kokini, 2002;Kunaik and Marchessault, 1972;Seker and Hanna, 2006;Simkovic et al, 2004;Wattanachant et al, 2003). In addition to cross-linking, blending starch with synthetic polymers has also been considered to improve the performance of starch products.…”

Section: Introductionmentioning

confidence: 99%

Citric acid cross-linking of starch films

2010

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Section: Introductionmentioning

confidence: 99%

Citric acid cross-linking of starch films

2010

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“…The primary focus of carrying out these types of grafting reactions is to obtain products having good water absorption properties, new polymers that can form sheets [ 75 ]. Due to the bulky industrial application of starch and cellulose in textile, paper, and food industry, they are being grafted or crosslinked to produce derivatives having different functional properties [ 76 ].There are several reports of chemical modification of agar and agarose by inducing hydrophobic groups such as alkyl, acetyl, and hydroxy alkyl groups to decrease gelling and melting temperature, which is very crucial for bacteriological applications of the polysaccharide [ 77 ]. Low gel strength agar gel is prepared by reacting high gel strength agar with salts of weak acids viz., citric and ascorbic acids.…”

Section: Chemical and Physical Modification Of Seaweed Polysaccharidesmentioning

confidence: 99%

Seaweed Polysaccharide Based Products and Materials: An Assessment on Their Production from a Sustainability Point of View

et al. 2021

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Among the various natural polymers, polysaccharides are one of the oldest biopolymers present on the Earth. They play a very crucial role in the survival of both animals and plants. Due to the presence of hydroxyl functional groups in most of the polysaccharides, it is easy to prepare their chemical derivatives. Several polysaccharide derivatives are widely used in a number of industrial applications. The polysaccharides such as cellulose, starch, chitosan, etc., have several applications but due to some distinguished characteristic properties, seaweed polysaccharides are preferred in a number of applications. This review covers published literature on the seaweed polysaccharides, their origin, and extraction from seaweeds, application, and chemical modification. Derivatization of the polysaccharides to impart new functionalities by chemical modification such as esterification, amidation, amination, C-N bond formation, sulphation, acetylation, phosphorylation, and graft copolymerization is discussed. The suitability of extraction of seaweed polysaccharides such as agar, carrageenan, and alginate using ionic solvent systems from a sustainability point of view and future prospects for efficient extraction and functionalization of seaweed polysaccharides is also included in this review article.

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“…Although raw starch has poor solubility in cooled water and retrogrades easily, oxidation can improve its water solubility via introducing carboxyl and carbonyl functional groups, , making it adaptable for mixing with CNCs. Starch can be cross-linked with the addition of phosphorus oxychloride, sodium trimetaphosphate, 1,2,3,4-diepoxbutane, and citric acid . Tannic acid (TA), a natural polyphenolic compound, is a good candidate as the green cross-linking agent for CNCs.…”

Section: Introductionmentioning

confidence: 99%

A Green and Iridescent Composite of Cellulose Nanocrystals with Wide Solvent Resistance and Strong Mechanical Properties

Feng

Dong

Gao

et al. 2021

ACS Sustainable Chem. Eng.

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Cellulose is the most abundant plant-based natural material. As a green and multifunctional material, the chiral nematic films from self-assembled cellulose nanocrystals (CNCs) have drawn considerable attention in recent years. Although the swellability in water and other solvents has been used to develop CNCs-based moisture sensors, CNCs films with a wide range of solvent resistance will greatly expand their practical applications. In this study, we demonstrated that the iridescent and hydrophilic CNCs films have been changed to films with excellent water resistance, even the strongly acidic or basic aqueous solutions, and various organic solvents via co-assembly with oxidized starch (OS) and tannic acid (TA). The composite films retain their structural integrity and preserve their vivid structural color after being immersed in water for 24 h. Moreover, the CNCs/OS/TA composite film with the weight ratio of CNCs and OS of 85:15 and the weight percentage of TA 8 wt % shows a tensile strength of up to 70.89 ± 3.21 MPa and the maximum Young's modulus to 18.67 ± 1.25 GPa, while, in the wet state, those values are still as high as 58.60 MPa and 13.60 GPa, respectively. The hydrogen-bond-based cross-linking via tannic acid endows CNCs films with an extraordinary solvents resistance and a significant increase in mechanical properties, which opens up a wide range of applications for CNCs-based iridescent films in harsh conditions.

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Cross-linking of starch with 1, 2, 3, 4-diepoxybutane or 1, 2, 7, 8-diepoxyoctane

Cited by 24 publications

References 15 publications

Citric acid cross-linking of starch films

Citric acid cross-linking of starch films

Seaweed Polysaccharide Based Products and Materials: An Assessment on Their Production from a Sustainability Point of View

A Green and Iridescent Composite of Cellulose Nanocrystals with Wide Solvent Resistance and Strong Mechanical Properties

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