Biodegradable blends of starch/polyvinyl alcohol/glycerol: multivariate analysis of the mechanical properties

Zanela, Juliano; Casagrande, Maira; Shirai, Marianne Ayumi; Lima, Vanderlei Aparecido de; Yamashita, Fábio

doi:10.1590/0104-1428.2420

Cited by 14 publications

(13 citation statements)

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“…To correlate the results discussed previously, PCA was conducted. Zanela et al . also used a multivariate methodology to study the behavior of starch–PVA–glycerol blends; the exploratory technique was useful for selecting the more suitable polyvinyl alcohol (PVA) type and the extrusion temperature to produce biodegradable materials with good mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

Impact of the starch source on the physicochemical properties and biodegradability of different starch‐based films

Luchese

Benelli

Spada

et al. 2018

J of Applied Polymer Sci

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Concern about environmental issues has motivated research into the development of biodegradable packaging from renewable sources. Natural polymers such as starch constitute a good alternative for diminishing the use of nonbiodegradable and nonrenewable components in the packaging industry. However, depending on the botanical source, films with different properties are formed. The aim of this study was to evaluate the film‐forming capacity of different starch sources (cassava, corn, potato, and wheat) by casting with starch contents from 2 to 6%. Principal component analysis methodology was used to evaluate the correlation between the formulations and their physicochemical and mechanical properties. It was not possible to produce continuous films based on potato starch, probably because of its very low amylose content (10%). The corn‐, cassava‐, and wheat‐starch‐based films were characterized by their thicknesses (0.06–0.22 mm), moisture contents (19–26%), water solubilities (13.7–26.5%), water‐vapor permeabilities (WVPs; 0.19–0.48 g mm h−1 m−2 kPa−1), wettabilities (35–106°), biodegradabilities in soil, and thermal and mechanical properties (tensile strength = 1.9–6.7 MPa, elongation = 41–166%, and Young's modulus = 8–127 MPa). The wheat starch films presented higher WVPs and lower mechanical properties. The cassava starch films presented lower wettabilities and good mechanical properties; this suggested that their use in packaging for products, such as fruits and vegetables, with higher water activities could be feasible. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46564.

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Section: Resultsmentioning

confidence: 99%

Impact of the starch source on the physicochemical properties and biodegradability of different starch‐based films

Luchese

Benelli

Spada

et al. 2018

J of Applied Polymer Sci

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“…Penelitian terkait penggunaan pati tapioka untuk membuat plastik biodegradable umumnya menggunakan plastik polipropilen (PP) (Obasi & Igwe, 2014), low-density polyethylene (Tanetrungroj & Prachayawarakorn, 2015;Nguyen et al, 2016), polyvinyl alcohol (Zanela et al, 2016) dan belum banyak laporan terkait pencampuran tapioka dengan HDPE sehingga terlalu sedikit pendalaman terhadap sifat mekanis dan struktur kompositnya. Oleh karena itu, fokus penelitian adalah untuk mempelajari pengaruh penambahan pati tapioka maksimum hingga 70% terhadap sifat komposit HDPE dan bagaimana dengan struktur polimernya.…”

Section: Pendahuluanunclassified

Pengaruh penambahan pati tapioka terhadap sifat mekanis dan struktur komposit high density polyethylene

Nurhajati¹,

Indrajati²,

Mayasari³

et al. 2019

MKKP

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“…Unfortunately, biodegradable plastic with desirable properties cannot be prepared from starch alone due to its poor mechanical strength, hydrophilicity, and high susceptibility to microbial attack. The properties of the plastic can be improved by blending starch with synthetic biodegradable polymers [3,4]. One of them is polyvinyl alcohol (PVA), which has excellent mechanical properties and the ability to form a uniform mixture with starch [5,6].…”

Section: -Introductionmentioning

confidence: 99%

Response Surface Methodology for Formulating PVA/Starch/Lignin Biodegradable Plastic

et al. 2022

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The use of petroleum-based plastics has raised environmental issues as more plastic waste enters and accumulates in the environment. It has led to the development of biodegradable plastics. Starch is one of the potential materials to make biodegradable plastic, but starch-based plastic has poor mechanical strength. Blending starch with poly(vinyl alcohol) (PVA) and lignin is expected to improve the mechanical properties of the plastic. Biodegradable plastic films from PVA/starch/lignin blends with glycerol as a plasticizer were prepared using an internal mixer for compounding and a hot press molding machine for film making. The percentage of lignin (2-10%), glycerol (25-65%), and mixing temperature (190-230 oC) were varied according to the three levels of the Box-Behnken design. The ANOVA evaluation revealed that glycerol had the most significant effect on the mechanical properties of the film. Then, three models for the estimation of tensile strength, elongation at break, and tear resistance were developed. As expected, the models satisfactorily predict the effect of all input variables on the response variables. The optimum conditions for preparing the film were acquired from the equations, namely 197.6 oC for the temperature, 10% for lignin, and 45.1% for glycerol. The biodegradable plastic prepared using the optimum conditions possessed a tensile strength of 8.46 ± 1.08 MPa, an elongation at break of 139.00 ± 8.59%, and a tear resistance of 69.50 ± 2.50 N/mm. These values are in good agreement with the predicted values. Doi: 10.28991/ESJ-2022-06-02-03 Full Text: PDF

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Biodegradable blends of starch/polyvinyl alcohol/glycerol: multivariate analysis of the mechanical properties

Cited by 14 publications

References 10 publications

Impact of the starch source on the physicochemical properties and biodegradability of different starch‐based films

Impact of the starch source on the physicochemical properties and biodegradability of different starch‐based films

Pengaruh penambahan pati tapioka terhadap sifat mekanis dan struktur komposit high density polyethylene

Response Surface Methodology for Formulating PVA/Starch/Lignin Biodegradable Plastic

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