Properties of Oxidized Starch Prepared by Hydrogen Peroxide, Chlorine Dioxide and Sodium Hypochlorite

Han, Bing

doi:10.2991/bbe-16.2016.69

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…The result of this pretreatment is the formation of carboxylic groups or aldehydes from the oxidation of the primary and secondary hydroxyl groups of the glucose units that make up the amylose and amylopectin polymers [46]. The oxidation of native starch involves the loss of its crystallization, leading to the weakening of hydrogen bonds, which will facilitate the bonding of monomeric units in the subsequent polymerization process [47].…”

Section: Pretreatment Methods 2: Oxidation Of Starchmentioning

confidence: 99%

Evaluation of Starch as an Environmental-Friendly Bioresource for the Development of Wood Bioadhesives

Arias

Feijoo

2021

Molecules

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The environment is a very complex and fragile system in which multiple factors of different nature play an important role. Pollution, together with resource consumption, is one of the main causes of the environmental problems currently affecting the planet. In the search for alternative production processes, the use of renewable resources seeks a way to satisfy the demands of resource consumption based on the premises of lower environment impact and less damage to human health. In the wood sector, the panel manufacturing process is based on the use of formaldehyde-based resins. However, their poor moisture resistance leads to hydrolysis of amino-methylene bonds, which induces formaldehyde emissions throughout the lifetime of the wood panel. This manuscript investigates the environmental profile associated with different wood bioadhesives based on starch functionalization as a renewable alternative to formaldehyde resins. Considering that this is a process under development, the conceptual design of the full-scale process will be addressed by process modeling and the environmental profile will be assessed using life cycle assessment methodology. A comparative study with synthetic resins will provide useful information for modify their development to become real alternatives in the wood-based panel industry. The results obtained show the enormous potential of starch bioadhesives, as their environmental impact values are lower compared to those based on petrochemicals. However, certain improvements in the energy process requirements and in the chemical agents used could be developed to provide even better results.

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Section: Pretreatment Methods 2: Oxidation Of Starchmentioning

confidence: 99%

Evaluation of Starch as an Environmental-Friendly Bioresource for the Development of Wood Bioadhesives

Arias

Feijoo

2021

Molecules

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“…The homogeneity of the oxidized starch film was attributed to the effect of depolymerization of the starch molecules [29]. The morphology of E15-NBC films with the addition of NBC suspension at various concentration of 0.50% and 1.00% w/w as shown in Figure 17 19a) exhibited a high intensity of absorption peak, which was assigned to depolymerization of the starch molecules by oxidation of hydroxyl group to aldehyde and carboxyl group [30,31]. The characteristic of NBC as shown in Figure 19c was the bands at 3200-3400 cm -1 and 1642 cm -1 , which were assigned to the intramolecular O-H stretching and glucose carbonyl of cellulose, respectively [28,32].…”

Section: Characterization Of Films and Papersmentioning

confidence: 95%

Development of starch-nanocellulose composites for using in surface treatment of paper

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The main role of surface sizing is to increase the surface strength of paper. Starch is commonly used as surface sizing agents, but there are still some limitations. In this study, nano-bacterial cellulose (NBC) produced by Acetobacto xylinum was used as a reinforcing material in starch-based composites. The suspensions of NBC starch-based composites were prepared by the additions of 0.10-10.00% w/w NBC into starch solution and were used as surface sizing agents. The structures and properties of NBC starch-based composite films were characterized by FTIR, XRD, and SEM. The mechanical properties and barrier properties of cellulosic paper with surface sizing by the NBC reinforced starch-based composite suspensions were investigated. With the addition of NBC at 1.00%, the mechanical properties in terms of burst index, tensile index, and folding endurance were increased by 10%, 10%, and 44%, respectively. Furthermore, the air resistance of surface sized paper was significantly improved by 56%, as compared to the surface sized paper without NBC addition. According to the results of mechanical properties and air resistance, it was suggested that the optimal NBC dosage in starch-based composite was 1.00%.

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Oxidation Assisted Fabrication of Sterculia Gum/Protein Hybrid Hydrogel Networks through Schiff Base Formation: Characterization and Swelling Kinetic Studies

Rana¹,

Sharma²

2021

Asian J. Chem.

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Polysaccharide/protein hybrid conjugate system becomes an emerging system with integrated characteristics of protein as well as polysaccharide to be exploited for recent advancements in biomedical sectors. Present study is an attempt to fabricate a sterculia gum/gelatin hybrid hydrophilic network system via Schiff base formation using oxidative route at ambient conditions. This route transforms hydrogel synthesis through green mode without employing any crosslinking systems so as to minimize the toxicity issues associated. Fabricated Schiff base based gel systems have been characterized by FT-IR, powdered XRD, FESEM and EDX to confirm the inclusion of new characteristics, morphological changes and functionalization. Oxidation of natural gum drastically alter the physico-chemical behaviour of the gum as confirmed by powdered XRD by incorporating crystalline nature of oxidized sterculia gum as compared to the native sterculia gum and the Schiff base formed. The changes observed are due to the chemical modification of sterculia gum during Schiff base formation. Further the swelling capacity of oxidized sterculia gum and crosslinked network formed is also modulated and was less as compared to native sterculia gum and gelatin. This article also elaborates the mechanistic changes which take place during oxidative route of hydrogel formation in various segments of sterculia gum during oxidation and Schiff base formation.

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Properties of Oxidized Starch Prepared by Hydrogen Peroxide, Chlorine Dioxide and Sodium Hypochlorite

Cited by 5 publications

References 12 publications

Evaluation of Starch as an Environmental-Friendly Bioresource for the Development of Wood Bioadhesives

Evaluation of Starch as an Environmental-Friendly Bioresource for the Development of Wood Bioadhesives

Development of starch-nanocellulose composites for using in surface treatment of paper

Oxidation Assisted Fabrication of Sterculia Gum/Protein Hybrid Hydrogel Networks through Schiff Base Formation: Characterization and Swelling Kinetic Studies

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