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Schutz GF, de Ávila Gonçalves S, Alves RMV, Vieira RP. A review of starch-based biocomposites reinforced with plant fibers. Int J Biol Macromol 2024; 261:129916. [PMID: 38311134 DOI: 10.1016/j.ijbiomac.2024.129916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 01/09/2024] [Accepted: 01/31/2024] [Indexed: 02/06/2024]
Abstract
Renewable and biodegradable resources have gained increasing attention as promising alternatives to synthetic plastics. Among the diverse raw materials employed in bioplastics production, starch emerges as an attractive, low-cost, and largely available source. However, the inherent properties of starch-based materials often limit their utility across various applications, necessitating strategic modifications to enhance their performance. A common approach to boost these materials involves incorporating natural fillers into biopolymer matrices. Incorporating natural fibers within starch matrices enables the development of biocomposites with improved properties while retaining their renewable and biodegradable characteristics. This review briefly addresses fundamental aspects of starch structure, obtention, and processing, as well as the main pre-treatments of natural fibers and processing methods currently applied to produce starch-based composites. It also highlights the most recent advances in this field, elucidates the effect of the incorporation of fibers on the biocomposite properties, and discusses the critical parameters affecting the synergic combination between starch and fibers.
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Affiliation(s)
- Guilherme Frey Schutz
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Engenharia Química (FEQ), Campinas, São Paulo, Brazil.
| | - Sayeny de Ávila Gonçalves
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Engenharia Química (FEQ), Campinas, São Paulo, Brazil
| | - Rosa Maria Vercelino Alves
- Instituto de Tecnologia de Alimentos (ITAL), Centro de Tecnologia de Embalagem (CETEA), Campinas, São Paulo, Brazil
| | - Roniérik Pioli Vieira
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Engenharia Química (FEQ), Campinas, São Paulo, Brazil.
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Saepoo T, Sarak S, Mayakun J, Eksomtramage T, Kaewtatip K. Thermoplastic starch composite with oil palm mesocarp fiber waste and its application as biodegradable seeding pot. Carbohydr Polym 2023; 299:120221. [PMID: 36876822 DOI: 10.1016/j.carbpol.2022.120221] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 09/21/2022] [Accepted: 10/11/2022] [Indexed: 11/05/2022]
Abstract
Thermoplastic starch (TPS) composites with oil palm mesocarp fiber waste were prepared using compression molding. Oil palm mesocarp fiber (PC) was reduced to powder (MPC) by dry grinding in a planetary ball mill at various speeds and grinding times. It was found that fiber powder with the smallest particle size (33 μm) was obtained at a rotation speed of 200 rpm after milling for 90 min. A TPS composite with 50 wt% of MPC showed the highest tensile strength, thermal stability, and water resistance. A biodegradable seeding pot was produced from this TPS composite that was slowly degraded by microorganisms in the soil without releasing pollutants. The pot could support certain commercially and domestically grown plants for the duration of their growth period and showed potential as an innovative product that could replace existing non-biodegradable products.
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Affiliation(s)
- Thonyaporn Saepoo
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Sukanya Sarak
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Jaruwan Mayakun
- Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand; Molecular Evolution and Computational Biology Research Unit, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Theera Eksomtramage
- Department of Plant Science, Faculty of Natural Resources, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Kaewta Kaewtatip
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand; Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
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Kachaanun P, Numnuam A, Mayakun J, Kaewtatip K. Utilization of brown alga (
Sargassum plagiophyllum
) as an efficient reinforcement material for application in wheat gluten biocomposites. J Appl Polym Sci 2021. [DOI: 10.1002/app.52080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Punyawee Kachaanun
- Division of Physical Science, Faculty of Science Prince of Songkla University Songkhla Thailand
| | - Apon Numnuam
- Division of Physical Science, Faculty of Science Prince of Songkla University Songkhla Thailand
- Center of Excellence for Trace Analysis and Biosensor Prince of Songkla University Songkhla Thailand
| | - Jaruwan Mayakun
- Division of Biological Science, Faculty of Science Prince of Songkla University Songkhla Thailand
- Molecular Evolution and Computational Biology Research Unit, Faculty of Science Prince of Songkla University Songkhla Thailand
| | - Kaewta Kaewtatip
- Division of Physical Science, Faculty of Science Prince of Songkla University Songkhla Thailand
- Center of Excellence for Trace Analysis and Biosensor Prince of Songkla University Songkhla Thailand
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Li D, Kang X, Chu L, Wang Y, Song X, Zhao X, Cao X. Algicidal mechanism of Raoultella ornithinolytica against Microcystis aeruginosa: Antioxidant response, photosynthetic system damage and microcystin degradation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117644. [PMID: 34426391 DOI: 10.1016/j.envpol.2021.117644] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 05/21/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
Water eutrophication caused by harmful algal blooms (HABs) occurs worldwide. It causes huge economic losses and has serious and potentially life-threatening effects on human health. In this study, the bacterium Raoultella sp. S1 with high algicidal efficiency against the harmful algae Microcystis aeruginosa was isolated from eutrophic water. The results showed that Raoultella sp. S1 initially flocculated the algae, causing the cells to sediment within 180 min and then secreted soluble algicidal substances that killed the algal cells completely within 72 h. The algicidal activity was stable across the temperature range -85.0 to 85.0 °C and across the pH range 3.00-11.00. Scanning electron microscopy (SEM) revealed the crumpling and fragmentation of cells algal cells during the flocculation and lysis stages. The antioxidant system was activated under conditions of oxidative stress, causing the increased antioxidant enzymes activities. Meanwhile, the oxidative stress response triggered by the algicidal substances markedly increased the malondialdehyde (MDA) and glutathione (GSH) content. We investigated the content of Chl-a and the relative expression levels of genes related to photosynthesis, verifying that the algicidal compounds attack the photosynthetic system by degrading the photosynthetic pigment and inhibiting the expression of key genes. Also, the results of photosynthetic efficiency and relative electric transport rate confirmed that the photosynthetic system in algal cells was severely damaged within 24 h. The algicidal effect of Raoultella sp. S1 against Microcystis aeruginosa was evaluated by analyzing the physiological response and photosynthetic system impairment of the algal cells. The concentration of microcystin-LR (MC-LR) slightly increased during the process of algal cells ruptured, and then decreased below its initial level due to the biodegradation of Raoultella sp. S1. To further investigate the algicidal mechanism of Raoultella sp. S1, the main components in the cell-free supernatant was analyzed by UHPLC-TOF-MS. Several low-molecular-weight organic acids might be responsible for the algicidal activity of Raoultella sp. S1. It is concluded that Raoultella sp. S1 has the potential to control Microcystis aeruginosa blooms.
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Affiliation(s)
- Dongpeng Li
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xin Kang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Linglong Chu
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Yifei Wang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xinshan Song
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xiaoxiang Zhao
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xin Cao
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
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