A Natural Rubber Waste Derived Surfactant for High Internal Phase Emulsion Templating of Poly(Dicyclopentadiene)

Schallert, Viktor; Slugovc, Christian

doi:10.1002/macp.202100110

Cited by 6 publications

(1 citation statement)

References 43 publications

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“…Porous parts share similar concepts of pore formation with porous fibers. The frequently used preparation methods include the high internal phase emulsion template method [ 58 , 59 ], solvent etching [ 60 ], freeze-drying [ 61 , 62 ], and thermally induced phase separation [ 63 ]. Foaming technology stands out as a commonly employed method for the preparation of porous materials, accomplishing lightweighting and the formation of closed-cell structures by introducing gas bubbles into the material [ 64 , 65 ].…”

Section: Introductionmentioning

confidence: 99%

A Review of the Preparation of Porous Fibers and Porous Parts by a Novel Micro-Extrusion Foaming Technique

Wang,

Huang,

Wang

et al. 2023

Materials

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This review introduces an innovative technology termed “Micro-Extrusion Foaming (MEF)”, which amalgamates the merits of physical foaming and 3D printing. It presents a groundbreaking approach to producing porous polymer fibers and parts. Conventional methods for creating porous materials often encounter obstacles such as the extensive use of organic solvents, intricate processing, and suboptimal production efficiency. The MEF technique surmounts these challenges by initially saturating a polymer filament with compressed CO2 or N2, followed by cell nucleation and growth during the molten extrusion process. This technology offers manifold advantages, encompassing an adjustable pore size and porosity, environmental friendliness, high processing efficiency, and compatibility with diverse polymer materials. The review meticulously elucidates the principles and fabrication process integral to MEF, encompassing the creation of porous fibers through the elongational behavior of foamed melts and the generation of porous parts through the stacking of foamed melts. Furthermore, the review explores the varied applications of this technology across diverse fields and imparts insights for future directions and challenges. These include augmenting material performance, refining fabrication processes, and broadening the scope of applications. MEF technology holds immense potential in the realm of porous material preparation, heralding noteworthy advancements and innovations in manufacturing and materials science.

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Section: Introductionmentioning

confidence: 99%

A Review of the Preparation of Porous Fibers and Porous Parts by a Novel Micro-Extrusion Foaming Technique

Wang,

Huang,

Wang

et al. 2023

Materials

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Coordinating Additives as Activity Modulators in Diiodo Latent Olefin Metathesis Catalysts

et al. 2023

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The ruthenium alkylidene catalyzed ring‐closing metathesis (RCM) of 5‐membered rings is an intramolecular reaction that is highly favored due to entropic and enthalpic contributions. Counterintuitively, by using trifluoromethyl sulfur‐chelated ruthenium benzylidene (Ru−SCF3−I), RCM of a diene with a hindered dimethyl terminus, diethyl 2‐allyl‐2‐(3‐methylbut‐2‐en‐1‐yl) malonate (S1), could be achieved at high concentrations but not at low concentrations. This finding led to the discovery that several additives, including ethyl acetate, significantly enhance the latent catalyst's activity. DFT computations and NMR control experiments suggest that additive coordination influences the catalytic cycle. Moreover, the “ethyl acetate effect” was studied in ring‐opening metathesis polymerizations (ROMP), providing a more efficient initiation when the reactions are run in environmentally friendly ethyl acetate as the solvent. The strong influence of simple coordinating additives (sometimes present in the substrate itself) on the activation of latent catalysts provides important insights into the reaction mechanism and opens a doorway towards improving the efficiency of these types of catalysts.

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Emulsion templated three-dimensional porous scaffolds for drug delivery

Yadav¹,

Agrawal²,

Srivastava³

2023

Fiber and Textile Engineering in Drug Delivery Systems

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A Natural Rubber Waste Derived Surfactant for High Internal Phase Emulsion Templating of Poly(Dicyclopentadiene)

Cited by 6 publications

References 43 publications

A Review of the Preparation of Porous Fibers and Porous Parts by a Novel Micro-Extrusion Foaming Technique

A Review of the Preparation of Porous Fibers and Porous Parts by a Novel Micro-Extrusion Foaming Technique

Coordinating Additives as Activity Modulators in Diiodo Latent Olefin Metathesis Catalysts

Emulsion templated three-dimensional porous scaffolds for drug delivery

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