Chapter 6. Protein-based Aerogels: Processing and Morphology

Fitzpatrick, Sarah E.; Staiger, Mark P.; Deb‐Choudhury, Santanu; Ranford, Steve

doi:10.1039/9781782629979-00067

Cited by 7 publications

(4 citation statements)

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“…It is known that temperature, freezing time and speed, ionic strength, and vacuum pressure are factors determining the final properties and morphology of the aerogel. For example, high freezing temperatures increase the porosity but at the same time favor the denaturation of the biopolymers and, with them, the degeneration of the aerogel [ 69 , 70 ].…”

Section: Preparation Methodsmentioning

confidence: 99%

Biopolymeric Fibrous Aerogels: The Sustainable Alternative for Water Remediation

et al. 2023

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The increment in water pollution due to the massive development in the industrial sector is a worldwide concern due to its impact on the environment and human health. Therefore, the development of new and sustainable alternatives for water remediation is needed. In this context, aerogels present high porosity, low density, and a remarkable adsorption capacity, making them candidates for remediation applications demonstrating high efficiency in removing pollutants from the air, soil, and water. Specifically, polymer-based aerogels could be modified in their high surface area to integrate functional groups, decrease their hydrophilicity, or increase their lipophilicity, among other variations, expanding and enhancing their efficiency as adsorbents for the removal of various pollutants in water. The aerogels based on natural polymers such as cellulose, chitosan, or alginate processed by different techniques presented high adsorption capacities, efficacy in oil/water separation and dye removal, and excellent recyclability after several cycles. Although there are different reviews based on aerogels, this work gives an overview of just the natural biopolymers employed to elaborate aerogels as an eco-friendly and renewable alternative. In addition, here we show the synthesis methods and applications in water cleaning from pollutants such as dyes, oil, and pharmaceuticals, providing novel information for the future development of biopolymeric-based aerogel.

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Section: Preparation Methodsmentioning

confidence: 99%

Biopolymeric Fibrous Aerogels: The Sustainable Alternative for Water Remediation

et al. 2023

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“…Powder of sodium alginate, as received, had a bulk density of 0.509 ± 0.017 g/mL and the reported skeleton density of sodium alginate is 1.6010 ± 0.0002 g/mL (Censi, Gigliobianco, Malaj, & Di Martino, 2016). From this data, we estimated a porosity of the sodium alginate powder of 68.2 ± 1.1 % -for details on the bulk and skeletal density of aerogels see (Fitzpatrick, Staiger, Deb-Choudhury, & Ranford, 2018). Calcium carbonate (CaCO 3 , Sigma Aldrich), Dglucono-δ-lactone (GDL, Sigma Aldrich), aminopropyltriethoxysilane (APTES, 97%, Sigma-Aldrich), (3trimethoxysilylpropyl)diethylenetriamine (TMPMT, 95%, Fluorochem), Nphenylaminomethyltriethoxysilane (PATES, 95%, Fluorochem), thiocyanatopropyltriethoxysilane (TCTES, 95%, Fluorochem), glycidoxypropyltrimethoxysilane (GPTMS, 98%, Sigma Aldrich), phenyltriethoxysilane (PTES, 97%, Gelest), sodium hydroxide (NaOH, Sigal), hydrochloric acid (HCl, Sigal) were used without further purification.…”

Section: Reagentsmentioning

confidence: 98%

Revealing importance of particles’ surface functionalization on the properties of magnetic alginate hydrogels

Barczak

Borowski

Gila-Vilchez

et al. 2020

Carbohydrate Polymers

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Iron/silica core-shell microparticles (IMPs) were functionalized by different functional groups including amine, glycidoxy, phenyl, and thiocyanate. Many of the IMPs modifications are reported for the first time. The resulting surface chemistry turned out to affect the properties of magnetic alginate hydrogels fabricated from sodium alginate and dispersed IMPs. Differences in magnetorheological properties of the obtained magnetic hydrogels can be at least partially attributed to the interactions between alginate and surface functionalities of IMPs. Density Functional Theory (DFT) calculations were carried out to get detailed insight into those interactions in order to link them with the observed macroscopic properties of the obtained hydrogels. For example, amine groups on the IMPs surface resulted in well-formed hydrogels while the presence of thiocyanate or phenyl groups -in poorly formed ones. This observation can be used for tuning the properties of various carbohydrate-based hydrogels.

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“…Aerogels are a light and porous solid material derived from gels and can be used for catalysis (Lefatle & John, 2018). A number of studies have shown that protein‐based aerogels are becoming a promising sustainable biomaterial in the fields of medicine and biological sciences (Ahmadi et al., 2016; Fitzpatrick et al., 2018; Kleemann et al., 2019).…”

Section: Applications Of Spi Gelsmentioning

confidence: 99%

Soy protein isolates: A review of their composition, aggregation, and gelation

Regenstein

Zhou

et al. 2022

Comp Rev Food Sci Food Safe

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Considering that a series of complex issues such as environmental problems, sustainable development, animal welfare, and human health are on a global scale, the development of vegetable protein‐based meat substitutes provides a potential solution to the disparity between meat consumption demand and supply. The research and development of vegetable protein‐based meat substitutes have become a major commercial activity, and the market is expanding to meet the growing consumer demand. Soy protein isolates (SPI) are often used as a raw material for vegetable meat substitutes because of their potential to form fiber structures. Although significant initial success has been achieved, it is still a challenge to explain how the composition and aggregation of SPI influence gel properties and the mechanism(s) involved. This article reviews the latest research about SPI. The relationship between the composition, aggregation, and gelation properties of SPI is based on a through literature search. It focused on the application of SPI in heat‐ and cold‐induced gels, given the diversified market demands. The research on cold gel has helped expand the market. The methods to improve the properties of SPI gels, including physical, chemical, and biological properties, are reviewed to provide insights on its role in the properties of SPI gels. To achieve environmentally friendly and efficient ways for the food industry to use SPI gel properties, the research prospects and development trends of the gel properties of SPI are summarized. New developments and practical applications in the production technology, such as for ultrasound, microwave and high pressure, are reviewed. The potential and challenges for practical applications of cold plasma technology for SPI gel properties are also discussed. There is a need to transfer the laboratory technology to actual food production efficiently and safely.

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Chapter 6. Protein-based Aerogels: Processing and Morphology

Cited by 7 publications

References 0 publications

Biopolymeric Fibrous Aerogels: The Sustainable Alternative for Water Remediation

Biopolymeric Fibrous Aerogels: The Sustainable Alternative for Water Remediation

Revealing importance of particles’ surface functionalization on the properties of magnetic alginate hydrogels

Soy protein isolates: A review of their composition, aggregation, and gelation

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