Physical Properties of Films Based on Gelatin and Dialdehyde Starch with Different Oxidation Degrees

Nguyet, Le Thi Bich; Nguyen, Vinh Tien

doi:10.13005/ojc/370113

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…Thermogravimetric curves for native corn starch, chitosan, and their dialdehyde derivatives are shown in Figure 8 . Although previous works showed changes in the thermal stability of oxidized starch and chitosan [ 39 , 40 , 46 , 47 , 48 ], specific thermal parameters have not been determined, and there is no detailed discussion and comparison with native biopolymers. TGA also provides information on the structure of the tested materials and may confirm the effectiveness of their oxidation process.…”

Section: Resultsmentioning

confidence: 99%

The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment

et al. 2022

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Inorganic aluminum or iron salts supported with synthetic polymers are commonly used to eradicate colloidal particles from water in coagulation and flocculation processes. Nevertheless, these agents have several disadvantages, such as large volumes of sludge produced or environmental toxicity. Recently biodegradable polymers have been suggested as eco-friendly flocculants for water treatment. This study aimed to investigate the possibilities of using starch and chitosan and their oxidized derivatives as flocculants for filter backwash water treatment. Dialdehyde starch (DST) and dialdehyde chitosan (DCT) were synthesized by periodate oxidization of natural starch from corn and low molecular weight chitosan. The obtained materials have been characterized with scanning electron microscopy (SEM), ATR-FTIR spectroscopy, and thermogravimetric analysis (TGA). Furthermore, we studied the flocculation properties of polysaccharide flocculants in a series of jar tests. The effectiveness of chitosan and starched-based flocculants was compared to synthetic polymers commonly used to treat iron ions-rich filter backwash water. The environmental aspects of these chemicals, particularly the biodegradability of post-flocculation residues, were also addressed. It was found that oxidized starch and chitosan derivatives can be used as ecological flocculating materials to treat potable water or sludge.

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Section: Resultsmentioning

confidence: 99%

The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment

et al. 2022

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“…The results for contact angle were significantly higher for collagen films cross-linked with DAS; thus, samples were characterized by lower hydrophilicity or a more hydrophobic character and lower wettability. Selected physicochemical properties of gelatin/DAS films were evaluated by Nguyet et al They also indicated that the higher the aldehyde content in films modified with DAS, the lower the hydrophilicity of the samples [46]. Bajer et al conducted contact angle measurements of native starch and dialdehyde starch blends, which resulted in confirmation of the hydrophobic influence of dialdehyde starch on studied materials [45].…”

Section: Contact Angle and Surface Energymentioning

confidence: 99%

Dialdehyde Starch as a Cross-Linking Agent Modifying Fish Collagen Film Properties

Brudzyńska,

Kulka-Kamińska,

Piwowarski

et al. 2024

Materials

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The aim of this research was the modification of fish collagen films with various amounts of dialdehyde starch (DAS). Film properties were examined before and after the cross-linking process by DAS. Prepared biopolymer materials were characterized by Fourier Transform Infrared Spectroscopy and Atomic Force Microscopy. Moreover, the mechanical, thermal and swelling properties of the films were evaluated and the contact angle was measured. Research has shown that dialdehyde starch applied as a cross-linking agent influences collagen film properties. Mechanical testing indicated a decrease in Young’s Modulus and an increase in breaking force, elongation at break, and tensile strength parameters. Results for contact angle were significantly higher for collagen films cross-linked with DAS; thus, the hydrophilicity of samples decreased. Modified samples presented a lower swelling degree in PBS than native collagen films. However, the highest values for the degree of swelling among the modified specimens were obtained from the 1% DAS samples, which were 717% and 702% for 1% and 2% collagen, respectively. Based on AFM images and roughness values, it was noticed that DAS influenced collagen film surface morphology. The lowest value of Rq was observed for 2%Coll_2%DAS and was approximately 10 nm. Analyzing thermograms for collagen samples, it was observed that pure collagen samples were less thermally stable than cross-linked ones. Dialdehyde starch is a promising cross-linking agent for collagen extracted from fish skin and may increase its applicability.

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Optimization and characterization of active bio-plastic film from tamarind (Tamarindus indica L.) seed starch enriched with red grape pomace extract

Moges,

Kassa,

Woldemariam

2024

Biomass Conv. Bioref.

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Physical Properties of Films Based on Gelatin and Dialdehyde Starch with Different Oxidation Degrees

Cited by 4 publications

References 7 publications

The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment

The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment

Dialdehyde Starch as a Cross-Linking Agent Modifying Fish Collagen Film Properties

Optimization and characterization of active bio-plastic film from tamarind (Tamarindus indica L.) seed starch enriched with red grape pomace extract

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