Ecofriendly films based on low-substituted starch acetate enhanced by polyvinyl alcohol additions

Кочкина, Н. Е.; Butikova, Olga A.; Лукин, Н. Д.

doi:10.1007/s13726-022-01083-3

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…AS has been mentioned to be blended by several types of polymers, for example polyvinyl alcohol (PVA) and chitosan. It was found that when PVA content was increased, elastic modulus, tensile strength, elongation, and degree of swelling of AS/PVA films increased and oil permeability reduced [10]. Moreover, water vapor permeability of AS/chitosan films decreased with increasing chitosan content [11].…”

Section: Introductionmentioning

confidence: 99%

Natural wound dressing films prepared from acetylated starch/κ-carrageenan blend incorporated with mandelic acid

SRIPHOCHAI,

PRACHAYAWARAKORN

2024

J Met Mater Miner

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Due to several limitations of acetylated starch film for wound dressing applications such as low mechanical properties and no antibacterial activity, acetylated starch film was, therefore, modified by different contents of κ-carrageenan and mandelic acid. Infrared spectra confirmed the presence of κ-carrageenan and mandelic acid in the modified acetylated starch films. In addition, the decreased crystallinity of the carrageenan modified acetylated starch films led to more smooth film, as observed by scanning electron images. Besides, the addition of various amounts of κ-carrageenan in the modified acetylated starch films caused the improvement of mechanical properties, moisture uptake, water vapor transmission rate (WVTR), and degree of swelling. Moreover, κ-carrageenan modified acetylated starch film loaded with 20 wt% of mandelic acid exhibited antibacterial property against both S.aureus and E.coli bacteria. Additionally, degree of crystallinity, mechanical properties, moisture uptake, WVTR, degree of swelling, antibacterial activity, and cytotoxicity of κ-carrageenan modified acetylated starch films added by different amounts of mandelic acid were also studied.

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Section: Introductionmentioning

confidence: 99%

Natural wound dressing films prepared from acetylated starch/κ-carrageenan blend incorporated with mandelic acid

SRIPHOCHAI,

PRACHAYAWARAKORN

2024

J Met Mater Miner

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“…The drawback of starchbased coating agents, however, is their lack of mechanical strength, hydrophilicity and brittleness [18]. Several solutions have been suggested to address these issues, including blending with cationic starch [14], chemical modification [15,16] and blending with film forming polymers, see for example [19][20][21][22][23][24][25]. Chemical modifications of starch or blending with film-forming polymers not only complicate the process but also result in products with greater material and energy intensities as well as a larger carbon footprint.…”

Section: Introductionmentioning

confidence: 99%

Toward a Circular Bioeconomy: Exploring Pineapple Stem Starch Film as Protective Coating for Fruits and Vegetables

et al. 2023

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In order to reduce our dependence on nonrenewable plastics and solve the problem of non-biodegradable plastic waste, there has been much attention paid to the development of biodegradable plastics from natural resources. Starch-based materials have been widely studied and developed for commercial production, primarily from corn and tapioca. However, the use of these starches could generate food security problems. Therefore, the use of alternative starch sources, such as agricultural waste, would be of great interest. In this work, we investigated the properties of films prepared from pineapple stem starch, which has a high amylose content. Pineapple stem starch (PSS) films and glycerol-plasticized PSS films were prepared and characterized using X-ray diffraction and water contact angle measurements. All films exhibited some degree of crystallinity, making them water-resistant. The effect of glycerol content on mechanical properties and gas (oxygen, carbon dioxide and water vapor) transmission rates was also studied. The tensile modulus and tensile strength of the films decreased with increasing glycerol content, while gas transmission rates increased. Preliminary studies showed that coatings made from PSS films could slow down the ripening process of bananas and extend their shelf life.

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“…Unfortunately, unmodified starch-based plastics suffer from limitations such as poor mechanical strength and low water resistance, impeding their broader utilization [ 13 ]. As a result, various strategies have been explored to mitigate these shortcomings, including chemical modifications of starch [ 14 , 15 , 16 ] and blending with other polymers [ 17 , 18 , 19 ]. Previous research has delved into various chemical reactions to modify starch, yielding oxidized starch, acetylated starch, crosslinked starch, hydroxypropyl starch, and heat-moisture treated starch [ 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Biodegradable Thermosetting Plastic Using Dialdehyde Pineapple Stem Starch

Tessanan,

Phinyocheep,

Amornsakchai

2023

Polymers

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Starch extracted from pineapple stem waste underwent an environmentally friendly modification process characterized by low-energy consumption. This process resulted in the creation of dialdehyde pineapple stem starch featuring varying aldehyde contents ranging from 10% to 90%. Leveraging these dialdehyde starches, thermosetting plastics were meticulously developed by incorporating glycerol as a plasticizer. Concurrently, unmodified pineapple stem starch was employed as a control to produce thermoplastic material under identical conditions. The objective of streamlining the processing steps was pursued by adopting a direct hot compression molding technique. This enabled the transformation of starch powders into plastic sheets without the need for water-based gelatinization. Consequently, the dialdehyde starch-based thermosetting plastics exhibited exceptional mechanical properties, boasting a modulus within the range of 1862 MPa to 2000 MPa and a strength of 15 MPa to 42 MPa. Notably, their stretchability remained relatively modest, spanning from 0.8% to 2.4%. Comparatively, these properties significantly outperformed the thermoplastic counterpart derived from unmodified starch. Tailoring the mechanical performance of the thermosetting plastics was achieved by manipulating the glycerol content, ranging from 30% to 50%. Phase morphologies of the thermoset starch unveiled a uniformly distributed microstructure without any observable starch particles. This stood in contrast to the heterogeneous structure exhibited by the thermoplastic derived from unmodified starch. X-ray diffraction patterns indicated the absence of a crystalline structure within the thermosets, likely attributed to the establishment of a crosslinked structure. The resultant network formation in the thermosets directly correlated with enhanced water resistance. Remarkably, the thermosetting starch originating from pineapple stem starch demonstrated continued biodegradability following a soil burial test, albeit at a notably slower rate when compared to its thermoplastic counterpart. These findings hold the potential to pave the way for the utilization of starch-based products, thereby replacing non-biodegradable petroleum-based materials and contributing to the creation of more enduring and sustainable commodities.

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Ecofriendly films based on low-substituted starch acetate enhanced by polyvinyl alcohol additions

Cited by 4 publications

References 33 publications

Natural wound dressing films prepared from acetylated starch/κ-carrageenan blend incorporated with mandelic acid

Natural wound dressing films prepared from acetylated starch/κ-carrageenan blend incorporated with mandelic acid

Toward a Circular Bioeconomy: Exploring Pineapple Stem Starch Film as Protective Coating for Fruits and Vegetables

Development of Biodegradable Thermosetting Plastic Using Dialdehyde Pineapple Stem Starch

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