A. S. Norfarhana, R. A. Ilyas, A. Nazrin, S. M. Sapuan, R. Syafiq, P. S. Khoo, A. H. Nordin, A. A. B. Omran, Dominic C. D. Midhun, H. S. N. Hawanis, N. H. Sari, M. Mahardika, M. Asrofi, H. Abral
Abstract Nanocellulose is a product of cellulose, a sustainable and plentiful resource. It’s distinctive nanoscale structure makes it a versatile, green and interesting material for a variety of applications. This article describes in detail the biosources of nanocellulose, the types and characteristics of nanocellulose, and the techniques used to produce nanocellulose fibers. The mechanical properties and morphologies of nanocellulose fibers are addressed in depth, along with their prospective applications in sectors, including paper packaging, building materials, composites, biomedicine, energy storage and filtration. In addition, the current state of nanocellulose research, including the opportunities in the field, as well as the future prospects of nanocellulose as a viable and sustainable material for a vast array of applications, are discussed.
{"title":"Nanocellulose: from biosources to nanofiber and their applications","authors":"A. S. Norfarhana, R. A. Ilyas, A. Nazrin, S. M. Sapuan, R. Syafiq, P. S. Khoo, A. H. Nordin, A. A. B. Omran, Dominic C. D. Midhun, H. S. N. Hawanis, N. H. Sari, M. Mahardika, M. Asrofi, H. Abral","doi":"10.1515/psr-2022-0008","DOIUrl":"https://doi.org/10.1515/psr-2022-0008","url":null,"abstract":"Abstract Nanocellulose is a product of cellulose, a sustainable and plentiful resource. It’s distinctive nanoscale structure makes it a versatile, green and interesting material for a variety of applications. This article describes in detail the biosources of nanocellulose, the types and characteristics of nanocellulose, and the techniques used to produce nanocellulose fibers. The mechanical properties and morphologies of nanocellulose fibers are addressed in depth, along with their prospective applications in sectors, including paper packaging, building materials, composites, biomedicine, energy storage and filtration. In addition, the current state of nanocellulose research, including the opportunities in the field, as well as the future prospects of nanocellulose as a viable and sustainable material for a vast array of applications, are discussed.","PeriodicalId":20156,"journal":{"name":"Physical Sciences Reviews","volume":"77 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89236698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Nazrin, A. S. Norfarhana, R. A. Ilyas, S. M. Sapuan, A. Khalina, R. Syafiq, M. Hamid, C. S. Hassan, I. Idris, P. S. Khoo, A. H. Nordin, H. S. N. Hawanis, M. L. Sanyang
Abstract The growing consciousness about global environmental concerns, particularly landfills, in conjunction with the rapid use of petroleum-based plastics, is a key factor behind the use of natural and biodegradable polymers in short-life applications like food packaging, container, and tray. Sugar palm stem is a biomass that has proven the potential to produce biodegradable polymers such as sugar palm starch. Nevertheless, their applications were limited due to their low tensile strength and excessive hydrophilicity. Plasticization using polyols, reinforcement with sugar palm fiber, cellulose, microcrystalline cellulose, or nanocellulose, blending with thermoplastic polymer, and addition of essential oils has been used to maximize the functional qualities of the starch biopolymer. As the content of plasticizers grew, the glass transition temperature and water absorption ability decreased. Furthermore, the addition of sugar palm nanocellulose to sugar palm starch improves the performances of sugar palm starch-based films as a packaging material. Addition of essential oil contributes to antibacterial properties and slightly improved tensile strength of the film. A comprehensive understanding on the interaction of starch-based biodegradable polymer and nanocellulose constituents for enhancing the physico-chemical properties of starch-based films is prerequisite for researchers in the design of industrial products with enhanced functional attributes. To address the knowledge gap, more studies including the reinforcement of new types of biodegradable polymer and nanocellulose derived from natural sources should be conducted in order to continually populate the database for research purposes.
{"title":"Sugar palm (Arenga p innata) thermoplastic starch nanocomposite films reinforced with nanocellulose","authors":"A. Nazrin, A. S. Norfarhana, R. A. Ilyas, S. M. Sapuan, A. Khalina, R. Syafiq, M. Hamid, C. S. Hassan, I. Idris, P. S. Khoo, A. H. Nordin, H. S. N. Hawanis, M. L. Sanyang","doi":"10.1515/psr-2022-0031","DOIUrl":"https://doi.org/10.1515/psr-2022-0031","url":null,"abstract":"Abstract The growing consciousness about global environmental concerns, particularly landfills, in conjunction with the rapid use of petroleum-based plastics, is a key factor behind the use of natural and biodegradable polymers in short-life applications like food packaging, container, and tray. Sugar palm stem is a biomass that has proven the potential to produce biodegradable polymers such as sugar palm starch. Nevertheless, their applications were limited due to their low tensile strength and excessive hydrophilicity. Plasticization using polyols, reinforcement with sugar palm fiber, cellulose, microcrystalline cellulose, or nanocellulose, blending with thermoplastic polymer, and addition of essential oils has been used to maximize the functional qualities of the starch biopolymer. As the content of plasticizers grew, the glass transition temperature and water absorption ability decreased. Furthermore, the addition of sugar palm nanocellulose to sugar palm starch improves the performances of sugar palm starch-based films as a packaging material. Addition of essential oil contributes to antibacterial properties and slightly improved tensile strength of the film. A comprehensive understanding on the interaction of starch-based biodegradable polymer and nanocellulose constituents for enhancing the physico-chemical properties of starch-based films is prerequisite for researchers in the design of industrial products with enhanced functional attributes. To address the knowledge gap, more studies including the reinforcement of new types of biodegradable polymer and nanocellulose derived from natural sources should be conducted in order to continually populate the database for research purposes.","PeriodicalId":20156,"journal":{"name":"Physical Sciences Reviews","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77238477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Raj, Manoj Singh, Prof Vikas Kumar, T.Ramya Devi, S. Upadhyay, P. Mishra, Sunil Kumar, M. Yadav, N. Sehrawat, M. Kumari
Abstract Gluconic acid is one of the most important natural acids which are moderately generated from glucose via a straightforward oxidation reaction process. Through the use of microorganisms like Gluconobacter (bacteria) and fungi, the reaction is facilitated through various enzymes such enzyme glucose oxidase and glucose dehydrogenase. The typical widespread, fermentation procedure is characterized by the use of Aspergillus niger (fungi). The primary gluconic acid derivatives, such as sodium gluconate, are widely used in the agricultural and food industries. Gluconic acid has several uses in the pharmaceutical, food, beverage, textile, cement, metal chelating agent, leather, and dairy sectors. Commercial production of gluconic acid made by fungi is well-established. Therefore, fermentation procedures and effective microorganisms are employed to produce gluconic acid with a higher yield and higher quality. These processes are also more economical and effectively convert inexpensive substrates into carbon sources. Production of gluconic acid has been reported with corn starch, grapes must, banana must, egg shells, and potato pulp using both solid state and submerged fermentation. This article provides a thorough analytical analysis for the gluconic acid production through microbial fermentation and its uses in agriculture and food. Additionally, this contemporary paper thoroughly examines the literature from recent years on the growth of gluconic acid production for the global market.
{"title":"Gluconic acid: strategies for microbial production using organic waste and applications","authors":"M. Raj, Manoj Singh, Prof Vikas Kumar, T.Ramya Devi, S. Upadhyay, P. Mishra, Sunil Kumar, M. Yadav, N. Sehrawat, M. Kumari","doi":"10.1515/psr-2022-0163","DOIUrl":"https://doi.org/10.1515/psr-2022-0163","url":null,"abstract":"Abstract Gluconic acid is one of the most important natural acids which are moderately generated from glucose via a straightforward oxidation reaction process. Through the use of microorganisms like Gluconobacter (bacteria) and fungi, the reaction is facilitated through various enzymes such enzyme glucose oxidase and glucose dehydrogenase. The typical widespread, fermentation procedure is characterized by the use of Aspergillus niger (fungi). The primary gluconic acid derivatives, such as sodium gluconate, are widely used in the agricultural and food industries. Gluconic acid has several uses in the pharmaceutical, food, beverage, textile, cement, metal chelating agent, leather, and dairy sectors. Commercial production of gluconic acid made by fungi is well-established. Therefore, fermentation procedures and effective microorganisms are employed to produce gluconic acid with a higher yield and higher quality. These processes are also more economical and effectively convert inexpensive substrates into carbon sources. Production of gluconic acid has been reported with corn starch, grapes must, banana must, egg shells, and potato pulp using both solid state and submerged fermentation. This article provides a thorough analytical analysis for the gluconic acid production through microbial fermentation and its uses in agriculture and food. Additionally, this contemporary paper thoroughly examines the literature from recent years on the growth of gluconic acid production for the global market.","PeriodicalId":20156,"journal":{"name":"Physical Sciences Reviews","volume":"2015 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86895814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Background: The vulnerabilities and risks of women injecting drug users (WIDUs) are different compared to their male counterparts. In light of scant literature in this area, we carried out this qualitative study with the aim to explore the lived experiences of WIDUs in the North of Mauritius. Its objectives were (1) To get an insight into the risks taken during the injection practices of WIDUs and (2) To obtain an in-depth understanding of the gender-specific vulnerability of the sexual behaviours of WIDUs. Methods: A qualitative phenomenological approach was used for the research work. Study participants were recruited from a specific needle exchange site, by purposive sampling until saturation of data was reached. In-depth interviews conducted were transcribed for thematic analysis. Ethical clearance was obtained from the relevant authorities. Findings: The principal theme which emerged from the data collected was “Drug Injection Scenario”, with the following sub-themes: settings for drug injection; pre-injection rituals; third party assistance; sharing and recycling of injecting materials. The second theme which came out was “Sex Work and Drug Use Interplay” with either sex work preceding drug injection or drug injection preceding sex work. Finally, the third theme was “Sexual Behaviours Screenplay” with casual encounters and unprotected sex. Conclusions: This study filled the gap with respect to the absence of qualitative studies among WIDUs in Mauritius. It revealed their risky drug injecting practices and sexual behaviours. Their psychological and physical dependence on drug injection contributed to their stay within this vulnerable circle. Their inability to access adequate support hinders them from coming out of the clutches of their risky drug injection and sexual practices. For resilience of the society, there is need to address the needs of this vulnerable group of women.
{"title":"Changing our outlook towards vulnerable women for societal resilience","authors":"Nitish Sookool, M. Chan Sun","doi":"10.1515/psr-2022-0274","DOIUrl":"https://doi.org/10.1515/psr-2022-0274","url":null,"abstract":"Abstract Background: The vulnerabilities and risks of women injecting drug users (WIDUs) are different compared to their male counterparts. In light of scant literature in this area, we carried out this qualitative study with the aim to explore the lived experiences of WIDUs in the North of Mauritius. Its objectives were (1) To get an insight into the risks taken during the injection practices of WIDUs and (2) To obtain an in-depth understanding of the gender-specific vulnerability of the sexual behaviours of WIDUs. Methods: A qualitative phenomenological approach was used for the research work. Study participants were recruited from a specific needle exchange site, by purposive sampling until saturation of data was reached. In-depth interviews conducted were transcribed for thematic analysis. Ethical clearance was obtained from the relevant authorities. Findings: The principal theme which emerged from the data collected was “Drug Injection Scenario”, with the following sub-themes: settings for drug injection; pre-injection rituals; third party assistance; sharing and recycling of injecting materials. The second theme which came out was “Sex Work and Drug Use Interplay” with either sex work preceding drug injection or drug injection preceding sex work. Finally, the third theme was “Sexual Behaviours Screenplay” with casual encounters and unprotected sex. Conclusions: This study filled the gap with respect to the absence of qualitative studies among WIDUs in Mauritius. It revealed their risky drug injecting practices and sexual behaviours. Their psychological and physical dependence on drug injection contributed to their stay within this vulnerable circle. Their inability to access adequate support hinders them from coming out of the clutches of their risky drug injection and sexual practices. For resilience of the society, there is need to address the needs of this vulnerable group of women.","PeriodicalId":20156,"journal":{"name":"Physical Sciences Reviews","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89902417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Pyrolysis technologies are a staple in plastic chemical recycling because of the robustness to contamination and existing infrastructure. Pyrolysis is already considered to be a reasonably mature technology with numerous pilot plants operating to pyrolyze plastic waste into fuels and chemicals. This chapter will describe the pyrolysis process and important process parameters, the types of plastics that are suitable for pyrolysis recycling, the mechanism of pyrolytic degradation of various plastics, the products derived from different plastics, companies that have successfully scaled pyrolysis recycling, and recent innovations in the technology.
{"title":"Circular plastics technologies: pyrolysis of plastics to fuels and chemicals","authors":"Katrina M. Knauer, Cody Higginson, Minjung Lee","doi":"10.1515/psr-2022-0175","DOIUrl":"https://doi.org/10.1515/psr-2022-0175","url":null,"abstract":"Abstract Pyrolysis technologies are a staple in plastic chemical recycling because of the robustness to contamination and existing infrastructure. Pyrolysis is already considered to be a reasonably mature technology with numerous pilot plants operating to pyrolyze plastic waste into fuels and chemicals. This chapter will describe the pyrolysis process and important process parameters, the types of plastics that are suitable for pyrolysis recycling, the mechanism of pyrolytic degradation of various plastics, the products derived from different plastics, companies that have successfully scaled pyrolysis recycling, and recent innovations in the technology.","PeriodicalId":20156,"journal":{"name":"Physical Sciences Reviews","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88218460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Isabella Cícera Dias Miranda, J. López, M. Hernández-Macedo
Abstract Sustainable packaging development with lower environmental impact is urgent due to the petroleum-based plastic accumulation. Thereby, nanocellulose arouses the interest of several industrial sectors as renewable sources material and its mechanical properties for packaging manufacture. Biopolymers such as starch have been an alternative in packaging preparation, although its low mechanical and water resistance represents a challenge for its application. An alternative to improve these starch characteristics is nanocellulose incorporation. Thus, this chapter proposes obtaining nanocellulose from renewable sources, and its environmental advantage to replace plastics. Furthermore, types of nanocellulose, methods for obtaining, and the main physicochemical characteristics of nanocellulose are discussed since this polymer versatility allows its application in several industrial sectors, especially in packaging development. Finally, this review presents the incorporation nanocellulose-based nanocomposites in matrices, aiming to obtain formulations containing active agents to improve mechanical strength and water resistance and packaged product quality.
{"title":"Environmental advantages and challenges of nanocellulose reinforced starch-based packaging","authors":"Isabella Cícera Dias Miranda, J. López, M. Hernández-Macedo","doi":"10.1515/psr-2022-0032","DOIUrl":"https://doi.org/10.1515/psr-2022-0032","url":null,"abstract":"Abstract Sustainable packaging development with lower environmental impact is urgent due to the petroleum-based plastic accumulation. Thereby, nanocellulose arouses the interest of several industrial sectors as renewable sources material and its mechanical properties for packaging manufacture. Biopolymers such as starch have been an alternative in packaging preparation, although its low mechanical and water resistance represents a challenge for its application. An alternative to improve these starch characteristics is nanocellulose incorporation. Thus, this chapter proposes obtaining nanocellulose from renewable sources, and its environmental advantage to replace plastics. Furthermore, types of nanocellulose, methods for obtaining, and the main physicochemical characteristics of nanocellulose are discussed since this polymer versatility allows its application in several industrial sectors, especially in packaging development. Finally, this review presents the incorporation nanocellulose-based nanocomposites in matrices, aiming to obtain formulations containing active agents to improve mechanical strength and water resistance and packaged product quality.","PeriodicalId":20156,"journal":{"name":"Physical Sciences Reviews","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89224112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. O. Adesanya, Olumide Olatunde Adesanya, S. Egieyeh
Abstract Green vegetables are examples of staple plants eating in Nigeria, and are assumed to be a well-off basis of phytochemicals and amino acids that are useful for the management and prevention of infections. However, in the farming of these vegetables, glyphosate-based herbicides (GBH (round up™)) are used as control against pests invasions which has cause reasons to be concern about their effects on the phyto-constituents present in these vegetables. In this study, we evaluated the phytochemicals constituents and amino acid profile of the leaves of Telfairia occidentalis Hook F, Amaranthus viridis Linn, Celosia argentea Linn and Cnidoscolus aconitifolius (Mill.) I. M. Johnst popular edible vegetables in Southwestern Nigeria. The vegetables seeds of these plants mentioned above were acquired from Institute of Agricultural Research and Training (IAR&T) Ibadan. And on a land designed and previously treated with a GBH (round up™) the seeds were planted and allowed to grow. A destructive method of leaves after maturation was achieved by out rightly plucking them out and air-drying under shade. Phytochemical assessments were done on milled plant samples to determine the presence of ten phyto-constituents. Centrifugation of powdered samples (2 g each) with acetonitrile at 1000 rotations per minute’s (rpm) was used to extract amino acids. Thereafter the extracts were individually spotted on a thin layer chromatography (TLC) plate and developed using the mobile phase consisting of methanol: acetic acid: water in ratio 7:2:1 v/v. The visualization for the presence of amino acids was completed by spraying the developed chromatographic plates with 0.5% ninhydrin in 2-propanol solution and observed in both day light and under the ultraviolet lamp and the retention factor (R f ).calculated for the different spots developed to determine the type of amino acids present. The assessment of phytochemicals from the four vegetables reveals the presence of alkaloids, tannins and steroids in all samples while anthraquinone glycosides, terpenoids and cardiac glycosides were absent and other phytochemicals varying in them. Ssaponins was found absent in Telfairia occidentalis and flavonoids in Cnidoscolus aconitifolius respectively. The observation of the TLC plates in daylight shows that the vegetables likely contained primary, secondary and proline amino acids while the calculation of the R f values of the TLC spots observed under an ultraviolet (UV) light indicated that amino acids found in the vegetables were methionine, tyrosine, leucine, isoleucine. However, phenylalanine was found only in Celosia argentea. The study evaluated phytochemicals and amino acids parameters in four leafy vegetables grown on contaminated glyphosate based herbicide soil and assessments shows that their medicinal properties were not altered with the minimal exposure to contaminant.
{"title":"Evaluation of phytochemicals and amino acid profiles of four vegetables grown on a glyphosate contaminated soil in Southwestern Nigeria","authors":"E. O. Adesanya, Olumide Olatunde Adesanya, S. Egieyeh","doi":"10.1515/psr-2022-0308","DOIUrl":"https://doi.org/10.1515/psr-2022-0308","url":null,"abstract":"Abstract Green vegetables are examples of staple plants eating in Nigeria, and are assumed to be a well-off basis of phytochemicals and amino acids that are useful for the management and prevention of infections. However, in the farming of these vegetables, glyphosate-based herbicides (GBH (round up™)) are used as control against pests invasions which has cause reasons to be concern about their effects on the phyto-constituents present in these vegetables. In this study, we evaluated the phytochemicals constituents and amino acid profile of the leaves of Telfairia occidentalis Hook F, Amaranthus viridis Linn, Celosia argentea Linn and Cnidoscolus aconitifolius (Mill.) I. M. Johnst popular edible vegetables in Southwestern Nigeria. The vegetables seeds of these plants mentioned above were acquired from Institute of Agricultural Research and Training (IAR&T) Ibadan. And on a land designed and previously treated with a GBH (round up™) the seeds were planted and allowed to grow. A destructive method of leaves after maturation was achieved by out rightly plucking them out and air-drying under shade. Phytochemical assessments were done on milled plant samples to determine the presence of ten phyto-constituents. Centrifugation of powdered samples (2 g each) with acetonitrile at 1000 rotations per minute’s (rpm) was used to extract amino acids. Thereafter the extracts were individually spotted on a thin layer chromatography (TLC) plate and developed using the mobile phase consisting of methanol: acetic acid: water in ratio 7:2:1 v/v. The visualization for the presence of amino acids was completed by spraying the developed chromatographic plates with 0.5% ninhydrin in 2-propanol solution and observed in both day light and under the ultraviolet lamp and the retention factor (R f ).calculated for the different spots developed to determine the type of amino acids present. The assessment of phytochemicals from the four vegetables reveals the presence of alkaloids, tannins and steroids in all samples while anthraquinone glycosides, terpenoids and cardiac glycosides were absent and other phytochemicals varying in them. Ssaponins was found absent in Telfairia occidentalis and flavonoids in Cnidoscolus aconitifolius respectively. The observation of the TLC plates in daylight shows that the vegetables likely contained primary, secondary and proline amino acids while the calculation of the R f values of the TLC spots observed under an ultraviolet (UV) light indicated that amino acids found in the vegetables were methionine, tyrosine, leucine, isoleucine. However, phenylalanine was found only in Celosia argentea. The study evaluated phytochemicals and amino acids parameters in four leafy vegetables grown on contaminated glyphosate based herbicide soil and assessments shows that their medicinal properties were not altered with the minimal exposure to contaminant.","PeriodicalId":20156,"journal":{"name":"Physical Sciences Reviews","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88716496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The thermoplastic-based starch has been increasingly demanding in recent years due to its high potential to substitute conventional plastic usage. Sago has been recognized as one of the sources of starch with a large abundance. This chapter mainly emphasized the modification of sago starch using different additives for biodegradable plastic. The other starch modifications are also discussed, including the effect of epoxidized waste cooking oil (EWCO) addition as a plasticizer, lime juice’s citric acid as a crosslinker on the physical and chemical characteristics of the modified starch composites. The results mainly showed the advantages of reinforcing sago starch with plasticizers, nanoparticles, nanocellulose, fibers, and cross-linking agents, such as increasing the mechanical strength, higher thermal stability, and higher biodegradability. Therefore, the thermoplastic films from sago starch provide a promising potential to be further developed for practical applications.
{"title":"Recent developments in sago starch thermoplastic bio-composites","authors":"S. Silviana, F. Dalanta","doi":"10.1515/psr-2022-0017","DOIUrl":"https://doi.org/10.1515/psr-2022-0017","url":null,"abstract":"Abstract The thermoplastic-based starch has been increasingly demanding in recent years due to its high potential to substitute conventional plastic usage. Sago has been recognized as one of the sources of starch with a large abundance. This chapter mainly emphasized the modification of sago starch using different additives for biodegradable plastic. The other starch modifications are also discussed, including the effect of epoxidized waste cooking oil (EWCO) addition as a plasticizer, lime juice’s citric acid as a crosslinker on the physical and chemical characteristics of the modified starch composites. The results mainly showed the advantages of reinforcing sago starch with plasticizers, nanoparticles, nanocellulose, fibers, and cross-linking agents, such as increasing the mechanical strength, higher thermal stability, and higher biodegradability. Therefore, the thermoplastic films from sago starch provide a promising potential to be further developed for practical applications.","PeriodicalId":20156,"journal":{"name":"Physical Sciences Reviews","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82785623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Nazrin, S. M. Sapuan, R. A. Ilyas, H. S. N. Hawanis, A. Khalina, R. Jumaidin, M. Asyraf, N. M. Nurazzi, M. Norrrahim, L. Rajeshkumar, M. Atikah
Abstract Bio-based materials must be studied to replace polymers from petrochemical sources in packaging applications. However, using polymers from petrochemical sources has caused consumer and environmental concerns. Therefore, synthetic and non-synthetic materials that can be used for packaging applications, scale-up methods, industrial uses, sustainability assessments, and end-of-life alternatives will all be included in this study. Synthetic polymers, e.g., polylactic acid (PLA), polyethylene furanoate (PEF), polybutylene succinate (PBS), and non-synthetic polymers, including waxes, lipids, proteins, starch, cellulose, and polyhydrodialkanoate (PHAs), are some of the bio-based compounds that will be covered in this work. Besides that, more attention is paid to surface modification techniques and coatings, multilayers, biocomposites, and additives used to modify material characteristics, particularly gas and moisture barriers and biodegradability. In sum, this research offers a comprehensive analysis of bio-based packaging materials, including processing, and an assessment of sustainability and available alternatives.
{"title":"Introduction to bio-based packaging materials","authors":"A. Nazrin, S. M. Sapuan, R. A. Ilyas, H. S. N. Hawanis, A. Khalina, R. Jumaidin, M. Asyraf, N. M. Nurazzi, M. Norrrahim, L. Rajeshkumar, M. Atikah","doi":"10.1515/psr-2022-0006","DOIUrl":"https://doi.org/10.1515/psr-2022-0006","url":null,"abstract":"Abstract Bio-based materials must be studied to replace polymers from petrochemical sources in packaging applications. However, using polymers from petrochemical sources has caused consumer and environmental concerns. Therefore, synthetic and non-synthetic materials that can be used for packaging applications, scale-up methods, industrial uses, sustainability assessments, and end-of-life alternatives will all be included in this study. Synthetic polymers, e.g., polylactic acid (PLA), polyethylene furanoate (PEF), polybutylene succinate (PBS), and non-synthetic polymers, including waxes, lipids, proteins, starch, cellulose, and polyhydrodialkanoate (PHAs), are some of the bio-based compounds that will be covered in this work. Besides that, more attention is paid to surface modification techniques and coatings, multilayers, biocomposites, and additives used to modify material characteristics, particularly gas and moisture barriers and biodegradability. In sum, this research offers a comprehensive analysis of bio-based packaging materials, including processing, and an assessment of sustainability and available alternatives.","PeriodicalId":20156,"journal":{"name":"Physical Sciences Reviews","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87585233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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