Micellization of poly(oxyethylene)‐poly(oxypropylene)‐poly(oxyethylene) copolymers in aqueous solution

Hergeth, Wolf‐Dieter; Bloss, P.; Schmutzler, K.; Wartewig, S.; Witkowski, Konrad; Woliński, Leszek

doi:10.1002/actp.1989.010400615

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…were not stable at the typical temperature of the hydrothermal synthesis (180-280 ºC). [66][67][68] To overcome this problem, Xiao et al 69 added tetraethyl orthosilicate to stabilise the micelles (using Pluronic ® P123 surfactant: EO20PO70EO20) through formation of a silica layer, which is then removed by an etching step using HF. They used biomass-derived saccharides as carbon precursors, such as D-glucose, D-fructose, D-maltose, sucrose, Dglucosamine hydrochloride, and β-cyclodextrin.…”

Section: Towards More Sustainable Soft-templating Systemsmentioning

confidence: 99%

A tutorial mini-review on nanoporous carbons from biosourced building blocks: ordered hierarchical nanoarchitectures through benign methodologies

Szabó

Thielemans

Seo

et al. 2023

Preprint

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Ordered hierarchically porous carbons exhibiting micro- and mesopores are state-of-the-art porous structures with extraordinary performance in a range of applications (e.g., electrochemistry, catalysis, water treatment). Nevertheless, they are mostly prepared using petroleum-based chemicals, through resource- and energy-intensive, environmentally unfriendly processes. In this tutorial mini-review, we highlight major limitations in the methodologies, and showcase important achievements towards developing more sustainable synthetic strategies. Compared to multi-step hard-templating/nano-casting procedures, soft-templating techniques can provide more efficient, benign, and direct ways to produce these nanostructures. The original soft-templating method, using Pluronic® surfactants as structure-directing agents and phenolic resins as carbon precursors, has been substantially modified over the years in light of sustainability issues. The formaldehyde crosslinker has been replaced with more benign, less toxic alternatives (e.g., glyoxal), and catalyst-free crosslinking approaches have been developed. Furthermore, the use of biobased building-blocks for the carbon precursor, such as lignin, plant-derived polyphenols (e.g., tannins), and various saccharides (e.g., D-glucose, D-fructose), has also been explored. Novel techniques, such as the coordination-induced self-assembly, mechanosynthesis, and modified hydrothermal treatment strategies are amongst the greenest processes developed so far. We give some critical comments on ongoing research in this field and point towards interesting research directions.

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Section: Towards More Sustainable Soft-templating Systemsmentioning

confidence: 99%

A tutorial mini-review on nanoporous carbons from biosourced building blocks: ordered hierarchical nanoarchitectures through benign methodologies

Szabó

Thielemans

Seo

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Unfortunately, the micelles are not stable at the typical temperature of the hydrothermal synthesis (180–280 °C). 76–78 To overcome this problem, Xiao et al 79 added tetraethyl orthosilicate to stabilise the micelles (using Pluronic® P123 surfactant: EO 20 PO 70 EO 20 ) through formation of a silica layer, which is then removed by an etching step using HF. They used biomass-derived saccharides as carbon precursors, such as d -glucose, d -fructose, d -maltose, sucrose, d -glucosamine hydrochloride, and β-cyclodextrin.…”

Section: Hierarchically Designed Ordered Mesoporous Biobased Carbons ...mentioning

confidence: 99%

“…Unfortunately, the micelles are not stable at the typical temperature of the hydrothermal synthesis (180-280 °C). [76][77][78] To overcome this problem, Xiao et al 79 which can undergo a hydrothermal process at much lower temperature (130 °C), using Pluronic® F127 surfactant. The hydrothermal process yielded an ordered cubic Im3m mesostructure with a micelle diameter of about 6 nm, and a carbon wall thickness of about 10 nm.…”

Section: Towards More Sustainable So-templating Systemsmentioning

confidence: 99%

A tutorial mini-review on nanoporous carbons from biosourced compounds: ordered hierarchical nanoarchitectures through benign methodologies

et al. 2023

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“…This is mainly because of the weak assembly ability of carbohydrates with soft templates, which are susceptible to hydrolysis, degradation, and relatively high HTC temperature (typically 130−180 °C). 37,58,64 Therefore, exploring a new strategy to improve the assembly of carbohydrates, and thus promote the formation of functional carbons with an ordered mesoporous structure, is of scientific and technological importance. Herein, we demonstrated a self-transformation strategy to control the D-fructose-based HTC/soft templating.…”

Section: ■ Introductionmentioning

confidence: 99%

“…To the best of our knowledge, there are few reports of effective and easy strategies to control the HTC/soft templating of carbohydrates, especially to synthesize ordered mesoporous carbons with specific properties and structures. This is mainly because of the weak assembly ability of carbohydrates with soft templates, which are susceptible to hydrolysis, degradation, and relatively high HTC temperature (typically 130–180 °C). ,, Therefore, exploring a new strategy to improve the assembly of carbohydrates, and thus promote the formation of functional carbons with an ordered mesoporous structure, is of scientific and technological importance.…”

Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Ordered Mesoporous Carbohydrate-Derived Carbons with Flower-like Structure and N-Doping by Self-Transformation

et al. 2014

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Hydrothermal carbonization (HTC) of carbohydrates is an economic and sustainable technique for the synthesis of carbon materials. However, the assembly of carbohydrates with soft templates is susceptible to hydrolysis, degradation, and relatively high HTC temperature. Thus, it is still challenging to control the HTC/soft templating of carbohydrates and prepare mesoporous carbon with specific properties. Herein, a simple and effective self-transformation strategy is proposed to improve the HTC/soft templating, which introduces an insoluble melamine sulfate into the formation processes. Mechanism studies indicate that the assembly of D-fructose with soft templates is greatly promoted by coassembling with the gradually released melamine sulfate. As a result, carbonaceous composites with a flower-like structure and N-doping were synthesized. Further, ordered mesoporous carbons with N-doping are obtained after calcination. The obtained carbons exhibit outstanding ability for heavy metal adsorption and supercapacitors. Significantly, this self-transformation strategy will open up new avenues for synthesizing carbohydrate-based functional carbons.

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Micellization of poly(oxyethylene)‐poly(oxypropylene)‐poly(oxyethylene) copolymers in aqueous solution

Cited by 11 publications

References 9 publications

A tutorial mini-review on nanoporous carbons from biosourced building blocks: ordered hierarchical nanoarchitectures through benign methodologies

A tutorial mini-review on nanoporous carbons from biosourced building blocks: ordered hierarchical nanoarchitectures through benign methodologies

A tutorial mini-review on nanoporous carbons from biosourced compounds: ordered hierarchical nanoarchitectures through benign methodologies

Controlled Synthesis of Ordered Mesoporous Carbohydrate-Derived Carbons with Flower-like Structure and N-Doping by Self-Transformation

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