Synthesis of a meltable polyzirconosilane precursor for SiZrNC multinary ceramics

Gao, Qiang; Han, Cheng; Wang, Xiaozhou; Wang, Kunjie

doi:10.1016/j.jeurceramsoc.2022.01.038

Cited by 9 publications

(3 citation statements)

References 39 publications

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“…Such approaches can be used including chemical and physical triggers for the controlled break down of polymeric materials into primary building blocks to facilitate the transition towards a circular economy [51,52]. Qiang et al [53] prepared a novel polymeric precursor with Zr-C-Si-N main chain structure was synthesized through a two-step method which shows an excellent moldable property, oxygen-free compositions and high Zr content of PZCS make it an ideal precursor for the preparation of UHTCs matrixes and fibers. Zhang X, et al [54] were successfully prepared high-temperature resistant polycarbonates with different BHPF contents by a melt-polycondensation method with BPA, DPC, and BHPF.…”

Section: Fabrication and Characterization Of Eco-friendly Microstruct...mentioning

confidence: 99%

Nanopolymer: Overview, Innovation and Applications

Ramteke

2022

PSPRJ

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BackgroundOver the years, continuous innovative advancement has been observed in the field of polymer technology. Lot many researchers have gained a wide attraction in recent years to characterized, designed, and fabricates number of novel polymer, biopolymer and nano biopolymer sophisticated materials mainly due to the benefits related to environmental sustainability which is need of hours in the green planet earth. The current review article highlights recent development and innovations in the area of polymer, biopolymer and nano biopolymer composites, such as synthesis, characterization, and application of such sophisticated novel composites in the polymer and related industries. Living organisms produced nano biopolymers (nanocellulose, nano starch, nano chitin, nano silk, etc.) and microbial nano biopolymers, having received widely scientific and engineering interests in recent decades due to their extensive availability, sustainability as well as biocompatibility and biodegradability. Compare with petroleum-based polymers, biopolymers are sustainable and biodegradable. Chemical, mechanical, and microbial methods are generally used to fabricate nano biopolymers from nature. Nano biopolymers can be processed via solution casting, vacuum filtration and freeze drying [1-4] while most microbial nano biopolymers, polyesters can be processed using polymer processing equipment, like extruder, injection molding, etc. [5]. Nanopolymers have been synthesized using various methods. Eco-friendly, fully biodegradable microstructured polymeric nanoparticles systems are widely in demand, as biomedicine specially in tissue engineering and regenerative medicine [6-9], targeted controlled delivery to particular organs/tissues, carriers of DNA in gene therapy and in their ability to deliver proteins, peptides and genes through an oral route of administration [10,11], biocompatibility with tissue and cells [12,13], to improve bioavailability, and bioactivity of various pharmaceutically active compound used in various ailments [14,15] biodegradable and smart packaging [16][17][18][19], environment protection such as global spill accidents, water quality [20,21] etc. To improve the current growth of the bio-economy and green chemistry, the use of bio-derived polymers and chemicals could also be considered [22].In recent years, the use of polymeric nanofibers has gained great importance in biomedical and biotechnological applications such as tissue engineering, controlled release

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Section: Fabrication and Characterization Of Eco-friendly Microstruct...mentioning

confidence: 99%

Nanopolymer: Overview, Innovation and Applications

Ramteke

2022

PSPRJ

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“…Nowadays, the polymer-derived ceramics route is attracting increasing attentions for preparing UHTCs with tailored phase composition and microstructure. [11][12][13] Generally, the polymer precursors for Hf-based composite ceramics were synthesized using three methods, including the blending of Hf-containing polymers with Si-containing polymers, the grafting of Hf-containing compounds onto the side chain of Si-containing polymers, and the direct polymerization of Hf-N or Hf-C bonds as the main chain functioning as oxygen-free single-source precursors. For example, Zhang et al 14 prepared Hf-based SiBCN ceramics by pyrolyzing the blending precursors of polyborosilazane and polyhafnoxane, whereas Song et al 15 described a hafnium-containing polyborosilazane precursor for SiBCNHf nanocomposites by the reaction of polyborosilazane with Hf(N(Et) 2 ) 4 .…”

Section: Introductionmentioning

confidence: 99%

“…Most cases of the abovementioned powder methods require high‐temperature and high‐pressure operations; moreover, achieving a homogeneous composition and microstructure in composite ceramics is challenging due to the difficulties in dispersing raw powders. Nowadays, the polymer‐derived ceramics route is attracting increasing attentions for preparing UHTCs with tailored phase composition and microstructure 11–13 …”

Section: Introductionmentioning

confidence: 99%

Synthesis and pyrolysis of Hf–N–B backbone polymer precursor for HfC/HfB₂ composite ceramics

Zhao,

Han,

Wang

et al. 2023

J Am Ceram Soc.

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Metallopolymers containing refractory metal in the main chain are highly desired but rarely reported as oxygen‐free single‐source precursors for preparing ultrahigh‐temperature ceramics. Herein, a novel single‐source precursor of poly‐hafnium‐borocarbosilane (PHBCNS) with an Hf–N–B backbone molecular structure was synthesized through the dehalogenation reaction between HfCl4 and B(NHCH3)3. The polymeric Hf–N–B chain with large bond angle and conjugated molecular structure endowed the PHBCNS precursor to be relatively stable, dissolvable, and meltable. Subsequent precursor pyrolysis up to 1800°C resulted in an HfC/HfB2 nanocomposite comprising an Hf content of 87.54 wt%, with the average grain size of HfC and HfB2 to be 34.9 and 74.1 nm, respectively. The ceramization mechanism and phase evolution from the PHBCNS precursor to HfC/HfB2 composite ceramics were thoroughly investigated. This work not only highlights a novel Hf–N–B backbone polymer with high metal content and good shaping properties but also provides fresh insights of designing single‐source precursors for ultrahigh‐temperature composite ceramics.

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Polymer precursor synthesis of novel ZrC–SiC ultrahigh-temperature ceramics and modulation of their molecular structure

Song

Shi

et al. 2023

Ceramics International

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Synthesis of a meltable polyzirconosilane precursor for SiZrNC multinary ceramics

Cited by 9 publications

References 39 publications

Nanopolymer: Overview, Innovation and Applications

Nanopolymer: Overview, Innovation and Applications

Synthesis and pyrolysis of Hf–N–B backbone polymer precursor for HfC/HfB₂ composite ceramics

Polymer precursor synthesis of novel ZrC–SiC ultrahigh-temperature ceramics and modulation of their molecular structure

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Synthesis of a meltable polyzirconosilane precursor for SiZrNC multinary ceramics

Cited by 9 publications

References 39 publications

Nanopolymer: Overview, Innovation and Applications

Nanopolymer: Overview, Innovation and Applications

Synthesis and pyrolysis of Hf–N–B backbone polymer precursor for HfC/HfB2 composite ceramics

Polymer precursor synthesis of novel ZrC–SiC ultrahigh-temperature ceramics and modulation of their molecular structure

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Synthesis and pyrolysis of Hf–N–B backbone polymer precursor for HfC/HfB₂ composite ceramics