EVA-PVA binder system for polymer derived mullite made by material extrusion based additive manufacturing

Sarraf, Fateme; Hadian, A.M.; Churakov, Sergey V.; Clemens, Frank

doi:10.1016/j.jeurceramsoc.2022.10.009

Cited by 10 publications

(5 citation statements)

References 49 publications

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“…In another study conducted by Sarraf et al in 2022, the challenge toward the fabrication of bulk polymer-derived ceramics due to intensive gas evolution during crosslinking was addressed [138]. Using a mixture of ethylene vinyl acetate (EVA) and polyvinyl alcohol (PVA) as the binder system was sufficient to introduce controlled open porosity through a solvent debinding step.…”

Section: Fused Deposition Modeling (Fdm)mentioning

confidence: 99%

Preceramic Polymers for Additive Manufacturing of Silicate Ceramics

Sarraf,

Churakov,

Clemens

2023

Polymers

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The utilization of preceramic polymers (PCPs) to produce both oxide and non-oxide ceramics has caught significant interest, owing to their exceptional characteristics. Diverse types of polymer-derived ceramics (PDCs) synthesized by using various PCPs have demonstrated remarkable characteristics such as exceptional thermal stability, resistance to corrosion and oxidation at elevated temperatures, biocompatibility, and notable dielectric properties, among others. The application of additive manufacturing techniques to produce PDCs opens up new opportunities for manufacturing complex and unconventional ceramic structures with complex designs that might be challenging or impossible to achieve using traditional manufacturing methods. This is particularly advantageous in industries like aerospace, automotive, and electronics. In this review, various categories of preceramic polymers employed in the synthesis of polymer-derived ceramics are discussed, with a particular focus on the utilization of polysiloxane and polysilsesquioxanes to generate silicate ceramics. Further, diverse additive manufacturing techniques adopted for the fabrication of polymer-derived silicate ceramics are described.

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Section: Fused Deposition Modeling (Fdm)mentioning

confidence: 99%

Preceramic Polymers for Additive Manufacturing of Silicate Ceramics

Sarraf,

Churakov,

Clemens

2023

Polymers

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“…10 Sarraf et al successfully bonded cracks in ceramic materials using a PVA/ethylenevinyl alcohol mixture. 11 Using a freeze-thawing method, Ye et al fabricated carboxymethyl cellulose/PVA hydrogels containing soy peptides (SPEs), which released a small amount of SPEs in the simulated gastric fluid and a complete release of SPEs in the simulated intestinal fluid with excellent control. 12 However, while the mechanical properties of the pure PVA hydrogel are lacking, natural wood not only exhibits excellent mechanical properties but is also biocompatible and degradable and can promote cell proliferation, differentiation, and transport functions, making it a new polymer material in the biological field.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Hydrogels are ideal for wound dressings because of their structural similarity to soft tissues, and they absorb wound exudate, act as a microbial barrier, maintain a relatively moist wound environment, allow oxygen penetration, and are excellent drug carriers for long-lasting controlled release of drugs, which can solve the problem of patients not being able to administer drugs at regular intervals. , Because of its strong adhesive properties and ease of controlled drug release after polyhydroxy gelling, polyvinyl alcohol (PVA) is a common material used in hydrogels . Sarraf et al successfully bonded cracks in ceramic materials using a PVA/ethylenevinyl alcohol mixture . Using a freeze-thawing method, Ye et al fabricated carboxymethyl cellulose/PVA hydrogels containing soy peptides (SPEs), which released a small amount of SPEs in the simulated gastric fluid and a complete release of SPEs in the simulated intestinal fluid with excellent control .…”

Section: Introductionmentioning

confidence: 99%

Efficient Photothermal, Flexible Wood-Based Hydrogel for Infected Wound Recovery

Liu

Song

et al. 2023

ACS Sustainable Chem. Eng.

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Photothermal therapy, because of its inherent high specificity and low invasiveness, can easily and quickly inhibit infected wounds and promote repair. Herein, flexible wood (LM) was synthesized and combined with clarithromycin-carrying black phosphorus in a polyvinyl alcohol matrix to create a highly effective photothermal and flexible wood-based hydrogel (LM@PBKb), which exhibited photothermal and photodynamic bactericidal effects as well as long-lasting wound sterility for the treatment of infected skin wounds. The LM@PBKb hydrogel exhibited a photothermal conversion efficiency of 28.8%. When 808 nm laser irradiation and the long-lasting sustained release of the LM@PBKb hydrogel were combined, Escherichia coli was almost completely inhibited. After 808 nm laser irradiation in the near-infrared region, LM@PBKb used in mice with infected wounds rapidly inhibited infection, maintained a sterile environment for a long time, and accelerated wound healing. Scanning electron microscopy images show that the wounds treated with LM@PBKb were relatively flat and resembled uninfected wounds. This highly efficient photothermal flexible wood-based hydrogel is a high-potential environmentally friendly biomaterial.

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“…However, all FDM‐PDC reports mix preceramic polymers with thermoplastic binder components (e.g., polypropylene) as suitable additives to obtain appropriate and stable composite filaments as well as defect‐free structures. [ 41–43 ] Thus, high volume shrinkage occurs and for SiC, significant presence of free carbon is observed. [ 43 ]…”

Section: Introductionmentioning

confidence: 99%

“…However, all FDM-PDC reports mix preceramic polymers with thermoplastic binder components (e.g., polypropylene) as suitable additives to obtain appropriate and stable composite filaments as well as defect-free structures. [41][42][43] Thus, high volume shrinkage occurs and for SiC, significant presence of free carbon is observed. [43] Herein, we take advantage of the shaping richness and chemical flexibility of preceramic polymers as single-source precursors (i.e., without thermoplastic binder components) to implement an extrusion AM technology derived from FDM as a new landscape in the field of SiC.…”

Section: Introductionmentioning

confidence: 99%

Straightforward Design Strategy toward 3D Near‐Net‐Shape Stoichiometric SiC Parts

Cheype,

Pateloup,

Bernard

2023

Advanced Materials

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Fused Deposition Modeling (FDM), traditionally reserved for thermoplastics, is extending here to advanced non‐oxide ceramics via a straightforward design strategy by considering the shaping and chemical richness offered by preceramic polymers. Specifically, 3D near net shape stoichiometric silicon carbide (SiC) objects are designed by manipulating the key features of a commercially available polycarbosilane (fusibility, high carbon content, relatively high SiC yield). In the early stage of the process, the carbon‐rich polycarbosilane is first mixed with Si and SiC fillers and then thermolyzed at 120°C to increase polymer branching while offering tailored rheological properties during micro‐extrusion and providing adequate shape retention once extruded. This allowed for the design of tailored and complex 3D complex polymer architectures with features down to 400 μm. The complex polymer parts are further converted into 3D stoichiometric SiC objects with quasi‐near‐net‐shape – a volume shrinkage reduced to 9.1% has been measured – by heat‐treatment at a temperature as low as 1400°C (argon flow). Given the flexibility to tune the preceramic polymer chemical and rheological properties, a new combined design approach is leveraged to generate bespoke advanced ceramics with a high freedom in geometry complexity.This article is protected by copyright. All rights reserved

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EVA-PVA binder system for polymer derived mullite made by material extrusion based additive manufacturing

Cited by 10 publications

References 49 publications

Preceramic Polymers for Additive Manufacturing of Silicate Ceramics

Preceramic Polymers for Additive Manufacturing of Silicate Ceramics

Efficient Photothermal, Flexible Wood-Based Hydrogel for Infected Wound Recovery

Straightforward Design Strategy toward 3D Near‐Net‐Shape Stoichiometric SiC Parts

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