Fabrication of chitin monoliths with controllable morphology by thermally induced phase separation of chemically modified chitin

Hajili, Emil; Suo, Zhicheng; Sugawara, Akihide; Asoh, Taka‐Aki; Uyama, Hiroshi

doi:10.1016/j.carbpol.2021.118680

Cited by 19 publications

(13 citation statements)

References 41 publications

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“…Natural chitosan can be used as a catalyst for biodiesel production. The functionality of chitosan comes from hydroxyl and amino groups obtained from alkaline deacetylation of amide groups of chitin (poly(β-(1-4)-N-acetyl-D-glucosamine) [ 24 , 72 ]. da Silva et al [ 73 ] adsorbed Cu ions into chitosan to synthesize CCu catalyst which was employed on babassu oil under optimized reaction conditions to yield 76.8% biodiesel.…”

Section: Polymeric Catalystsmentioning

confidence: 99%

Utilization of Polymeric Materials toward Sustainable Biodiesel Industry: A Recent Review

2022

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The biodiesel industry is expanding rapidly in accordance with the high energy demand and environmental deterioration related to the combustion of fossil fuel. However, poor physicochemical properties and the malperformance of biodiesel fuel still concern the researchers. In this flow, polymers were introduced in biodiesel industry to overcome such drawbacks. This paper reviewed the current utilizations of polymers in biodiesel industry. Hence, four utilizing approaches were discussed, namely polymeric biodiesel, polymeric catalysts, cold-flow improvers (CFIs), and stabilized exposure materials. Hydroxyalkanoates methyl ester (HAME) and hydroxybutyrate methyl ester (HBME) are known as polymeric biodiesel sourced from carbon-enriched polymers with the help of microbial activity. Based on the literature, the highest HBME yield was 70.7% obtained at 10% H2SO4 ratio in methanol, 67 °C, and 50 h. With increasing time to 60 h, HAME highest yield was reported as 68%. In addition, polymers offer wide range of esterification/transesterification catalysts. Based on the source, this review classified polymeric catalysts as chemically, naturally, and waste derived polymeric catalysts. Those catalysts proved efficiency, non-toxicity, economic feasibility, and reusability till the 10th cycle for some polymeric composites. Besides catalysis, polymers proved efficiency to enhance the biodiesel flow-properties. The best effect reported in this review was an 11 °C reduction for the pour point (PP) of canola biodiesel at 1 wt% of ethylene/vinyl acetate copolymers and cold filter plugging point (CFPP) of B20 waste oil biodiesel at 0.08 wt% of EVA copolymer. Polymeric CFIs have the capability to modify biodiesel agglomeration and facilitate flowing. Lastly, polymers are utilized for storage tanks and auto parts products in direct contact with biodiesel. This approach is completely exclusive for polymers that showed stability toward biodiesel exposure, such as polyoxymethylene (POM) that showed insignificant change during static immersion test for 98 days at 55 °C. Indeed, the introduction of polymers has expanded in the biodiesel industry to promote green chemistry.

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Section: Polymeric Catalystsmentioning

confidence: 99%

Utilization of Polymeric Materials toward Sustainable Biodiesel Industry: A Recent Review

2022

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“…The CT monolith was fabricated by the TIPS method reported in our previous study (Hajili et al 2022).…”

Section: Preparation Of Crosslinked Ct Monolithsmentioning

confidence: 99%

“…Herein, the TIPS was used on the chemically modi ed chitin to fabricate monolith, then converted into CS monolith by hydrolysis and deacetylation processes. In the previous report, we discussed the fabrication of cellulose (Xin et al 2017) and CT (Hajili et al 2022) monoliths. Compared with cellulose and CT, CS monolith has amine groups that can be used in many applications, such as removing metal ions from aqueous solution, enzyme immobilization, drug delivery, and protein separation without further modi cation.…”

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confidence: 99%

Fabrication of Chitosan Monolith by Thermally Induced Phase Separation of Chemically Modified Chitin to Remove Cu(II) Ions from the Water Solutions

Hajili

Sugawara

Asoh

et al. 2022

Preprint

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Chitosan (CS), an amino-polysaccharide, has applications in various areas, particularly in drinking water and wastewater treatment, with highly efficient properties for binding metal ions. Monoliths have been developed continuously for several decades, and today they hold an impressively strong position in highly efficient separation, ion exchange, catalysis, and chromatography. In our previous study, hierarchical chitin (CT) monolith was fabricated using chemically modified CT through the thermally induced phase separation (TIPS) method. This report generated highly effective, stable, and reusable CS monoliths by deacetylation of CT monoliths. The acquired monoliths demonstrated efficient removal of metal ions from the aqueous solution in a flow system. In order to gain durability in acidic and basic environments, epichlorohydrin (ECH) was used as a crosslinking agent. The crosslinked monoliths exhibited excellent performance in the adsorption of Cu(II) ions from the solution, and good reusability in multiple adsorption-desorption cycles without losing significant performance. The fabricated CS monolith can be modified and applied to various fields such as protein separation, catalyst, and drug delivery.

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“…Synthetic petroleum‐based polymers such as acrylic resins are mainly used in polymeric monoliths [8, 13]. However, bio‐based polymers, such as biopolyesters and polysaccharides, are compelling alternatives to help reduce the consumption of petroleum and the net emission of carbon dioxide in manufacturing processes [2, 14–17], for instance, cellulose and chitin monoliths have been developed for the adsorption of bio‐related molecules and dyes [18, 19].…”

Section: Introductionmentioning

confidence: 99%

“…However, bio-based polymers, such as biopolyesters and polysaccharides, are compelling alternatives to help reduce the Article Related Abbreviation: BGG, bovine ɤ-globulin. consumption of petroleum and the net emission of carbon dioxide in manufacturing processes [2,[14][15][16][17], for instance, cellulose and chitin monoliths have been developed for the adsorption of bio-related molecules and dyes [18,19].…”

Section: Introductionmentioning

confidence: 99%

Preparation of composite monoliths of quaternized chitosan and diatom earth for protein separation

Tanaka

Tomita

Honda

et al. 2022

J of Separation Science

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In this study, composite monoliths with porous structures were prepared using quaternized chitosan and diatom earth for protein separation. Quaternized chitosan (N-[(2-hydroxy-3-trimethylammonium)propyl] chitosan chloride) dissolved in water was mixed with diatom earth and crosslinked with glutaraldehyde under low-temperature conditions to form a cryogel. Interconnected porous monoliths were obtained after removing ice crystals from the cryogel. The monoliths adsorbed bovine serum albumin selectively from the solution mixture of bovine serum albumin and bovine ɤ-globulin, and bovine ɤ-globulin was recovered in the flow-through fraction. The adsorption selectivity was enhanced by changing the solution pH from 6.8 to 5.5. The adsorption of bovine serum albumin by the monolith was replicated at least five times following its washing with a buffer containing 400 mM NaCl and subsequent regeneration with a 10 mM acetate buffer. The composited monolith is a promising adsorbent for the removal of acidic proteins, such as serum albumin contamination in neutral proteins, for example, ɤ-globulins, in bioproduction processes.

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Fabrication of chitin monoliths with controllable morphology by thermally induced phase separation of chemically modified chitin

Cited by 19 publications

References 41 publications

Utilization of Polymeric Materials toward Sustainable Biodiesel Industry: A Recent Review

Utilization of Polymeric Materials toward Sustainable Biodiesel Industry: A Recent Review

Fabrication of Chitosan Monolith by Thermally Induced Phase Separation of Chemically Modified Chitin to Remove Cu(II) Ions from the Water Solutions

Preparation of composite monoliths of quaternized chitosan and diatom earth for protein separation

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