Optimizing electric corona treatment for hydroxypropylated starch-based coatings

Lyytikäinen, Johanna; Ovaska, Sami-Seppo; Soboleva, Ekaterina; Rinkūnas, Ringaudas; Lozovski, Tadeus; Maldžius, Robertas; Sidaravičius, Jonas; Johansson, Leena‐Sisko; Backfolk, Kaj

doi:10.1016/j.carbpol.2018.06.030

Cited by 9 publications

(3 citation statements)

References 20 publications

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“…Such polymer materials are widely used in several industries, from pharmaceuticals to the textile industry. Currently, new functional polymer materials are synthesized by modifying starch in four different ways: physical, chemical, enzymatic, and genetic engineering 3,67–69 . Genetic engineering mainly consists in controlling the amount of amylase and amylopectin in the composition of starch in different mass ratios.…”

Section: Synthesis Methods Of Functional Green Adsorbents Based On Ce...mentioning

confidence: 99%

Cellulose‐ and starch‐based functional materials for efficiently wastewater treatment

Bekchanov,

Mukhamediev,

Eshtursunov

et al. 2023

Polymers for Advanced Techs

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The present study provides an overview of scientific developments made in the last decade in the field of green adsorbents focusing on the modifications in cellulose and starch and their applications such as drug delivery, wastewater treatment, and ion exchange. For this purpose, an introduction to the various methods of modifying cellulose and starch is first given, and then the properties, application, and future priorities of green adsorbents are also discussed. Methods of modification of cellulose and starch under homogeneous and heterogeneous conditions using modifiers with different properties are also described. Various methods for modifying cellulose and starch and the use of the obtained green adsorbents are reviewed. A comparison of the sorption properties of green adsorbents based on cellulose and starch and other adsorbents used in industry has also been carried out. Future perspectives on green adsorbents based on cellulose and starch are as also highlighted.

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Section: Synthesis Methods Of Functional Green Adsorbents Based On Ce...mentioning

confidence: 99%

Cellulose‐ and starch‐based functional materials for efficiently wastewater treatment

Bekchanov,

Mukhamediev,

Eshtursunov

et al. 2023

Polymers for Advanced Techs

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“…When FGS-T and FDS-T were produced, the contact angle increased significantly to a value of 44 • (FGS-T) or to a value of 35.7 • (FDS-T), which means that the hydrophilicity of the surface of the film was lower (Figure 6C), probably due to the changes suffered by the starch after CT [7]. Lyytikäinen et al [42] reported that oxidation compounds can be formed during treatment (i.e., hydroxyl groups of starch can be oxidized to carbonyls), increasing the hydrophobic character of the polysaccharide and of the films constituted with it. Pankaj et al [43] used plasma treatments on cassava starch films and observed an increase in hydrophobicity.…”

Section: Physical Mechanical and Morphological Propertiesmentioning

confidence: 99%

Development and Characterization of Edible Films Based on Cassava Starch Modified by Corona Treatment

Otálora González,

Felix,

Bengoechea

et al. 2024

Foods

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Corona treatment (CT), a surface treatment widely used in the plastic industry, can be used to alter the properties of cassava starch. In the present work, CT was performed on dry granular starch (DS), water-suspended humid granular starch (HS), and gelatinized starch (GS). Different properties and structural characteristics of treated starches were studied. A lowering in pH was generally observed after CT and the rheological properties depended on the starch presentation. A reinforcement of DS and HS samples after CT was deduced from higher viscosity values in flow assays and viscoelastic moduli, but weak gels were obtained when CT was applied to GS. Changes in the A-type polymorphic structure, as well as a drop in relative crystallinity, were produced by CT for DS and HS. Additionally, changes in O-H and C-O-C FTIR bands were observed. Therefore, CT can be applied for starch modification, producing predominantly cross-linking in the DS and de-polymerization in the HS. Casting films made from the modified DS showed higher tensile strength and lower hydrophilicity, solubility, water absorption capacity, and water vapor permeability. Thus, the DS cross-linking induced by CT improved mechanical characteristics and hydrophobicity in edible films, which can be better used as packaging materials.

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“…However, TPS has very poor properties, such as high brittleness, poor water resistance and sensitivity to moisture [3]. The improvement of TPS properties by coating with poly(lactic acid) (PLA) [4], beeswax [5], chitosan [6,7,8], or plasma [9] has been reported. The blending of TPS with other polymers, such as with PLA [5,7,8], nanofibers [10], calcium gluconate [11], polypropylene [12], titanium dioxide [13], poly(butylene adipate-co-terephthalate) [14,15], chitosan [16], polyethylene (PE) [16,17], carboxymethyl cellulose [18], epoxidized natural rubber [19], poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [20] and poly(caprolactone) [21] has been documented.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dip Coating Polymer Solutions on Properties of Thermoplastic Cassava Starch

et al. 2019

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Thermoplastic starch (TPS) was prepared by melt-mixing cassava starch with glycerol. Polyethylene (PE), polyethylene-grafted-maleic anhydride (PE-MAH) and poly(lactic acid) (PLA) solutions at 2% (w/v) were used to coat TPS using the dip coating process. The tensile strength of TPS increased with the dip coating solution technique, especially for PLA coating. Swelling index, water-soluble matter and water droplet contact angle confirmed the water resistant improvement of TPS by PE-MAH and the PLA dip coating solution. Plasticizer bleeding was found in uncoated TPS after storage, but not in the coated TPS. Coating TPS with PE-MAH and PLA improved the tensile properties, water resistance and conquered plasticizer bleeding problems in TPS.

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Optimizing electric corona treatment for hydroxypropylated starch-based coatings

Cited by 9 publications

References 20 publications

Cellulose‐ and starch‐based functional materials for efficiently wastewater treatment

Cellulose‐ and starch‐based functional materials for efficiently wastewater treatment

Development and Characterization of Edible Films Based on Cassava Starch Modified by Corona Treatment

Effect of Dip Coating Polymer Solutions on Properties of Thermoplastic Cassava Starch

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