Carbon Nanotube Modified Ceramic Foams as Structured Palladium Supports for Polystyrene Hydrogenation

Mao, Feng; Lu, Hui; Li, Chen-Yang; Cao, Gaoping

doi:10.1021/acs.iecr.9b01228

Cited by 11 publications

(10 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the above research has solved the mass transfer problem of PS macromolecular chain on the catalyst surface, the problem of how to efficiently separate the powder catalyst after the reaction is still unresolved. Therefore, Han and Cao et al , prepared a structured foam ceramic carrier, grew CNTs, and then loaded Pd on it; the preparation process is shown in Figure . The active components can be evenly distributed on the surface of the macroporous foam ceramic.…”

Section: Catalytic Hydrogenation Of Unsaturated Polymersmentioning

confidence: 99%

“…The space structure change caused by the saturation of the side chain group makes PCHE greatly improve its heat, oxidation, and ultraviolet resistance, meanwhile retaining the advantages of high transparency of PS. 7,8,24,25 The research on the catalytic hydrogenation of PS began in the 1940s. Dr. Boyer of Dow Chemical Company (denoted as Dow) prepared hydrogenated PS for the first time.…”

Section: Catalytic Hydrogenation Of Unsaturated Polymersmentioning

confidence: 99%

“…The benzene rings on the side chain are hydrogenated to saturated cyclohexyl groups with chairlike structure. The space structure change caused by the saturation of the side chain group makes PCHE greatly improve its heat, oxidation, and ultraviolet resistance, meanwhile retaining the advantages of high transparency of PS. ,,, …”

Section: Catalytic Hydrogenation Of Unsaturated Polymersmentioning

confidence: 99%

“…TS-1 nanoparticles are highly dispersed in the prepared support (CNTs@FN) and contain a large amount of skeleton titanium, which shows extremely high activity and stability in propylene epoxidation reaction and also avoids the problem of separation of catalyst and product after reaction. Feng and Cao et al ,,, found that foamed metal is a more suitable substrate for CNTs growth than foam ceramics because there are a large number of micro-/mesopores in foam ceramics, which is easy to cause CNTs to overgrow in the pores and burst the ceramic structure. In addition, FN itself has the activity of catalyzing the growth of CNTs, so it is unnecessary to introduce additional catalysts.…”

Section: Polymer Hydrogenation Catalystsmentioning

confidence: 99%

See 3 more Smart Citations

Advances in the Catalytic Hydrogenation and Properties of Unsaturated Polymers

Yan

Cao

2023

Macromolecules

Self Cite

View full text Add to dashboard Cite

Polymer reaction and performance improvement are one of the important contents in the field of polymer materials science and engineering, in which polymer catalytic hydrogenation is an important part of polymer reaction. We reviewed the research achievements on polymer hydrogenation over the past 70 years and studied the mechanism of the hydrogenation reaction from the aspects of performance changes before and after polymer hydrogenation, the catalyst preparation/structure−activity relationship, and polymer hydrogenation kinetics. We pointed out the difficulty in separation and unsatisfactory high-temperature adaptability of traditional homogeneous catalysts and first proposed four effects affecting traditional heterogeneous polymer hydrogenation: scale effect, conformation effect, viscosity effect, and adhesion effect. Based on the structure−activity relationship of polymers, we put forward the application direction of hydrogenated polymers at present. We found that using a new kind of nanometal catalyst (Pd/CNTs@FN) as hydrogenation catalyst can effectively reduce or eliminate the negative effects of these four effects on the polymer hydrogenation reaction, and it is easy to separate from the reaction system. The addition of CNTs can effectively increase the specific surface area of the catalyst and strengthen the interaction between reactants and catalyst. Subsequent research should focus on designing the multiscale structure and improving low-temperature activity of the catalyst, reducing process cost, and using green and efficient separation methods to eliminate adverse effects, create a green and efficient polymer reaction system, accelerate the industrialization of polymer hydrogenation process, and provide theoretical guidance for the research and development of new polymer materials.

show abstract

Section: Catalytic Hydrogenation Of Unsaturated Polymersmentioning

confidence: 99%

Section: Catalytic Hydrogenation Of Unsaturated Polymersmentioning

confidence: 99%

Section: Catalytic Hydrogenation Of Unsaturated Polymersmentioning

confidence: 99%

Section: Polymer Hydrogenation Catalystsmentioning

confidence: 99%

See 2 more Smart Citations

Advances in the Catalytic Hydrogenation and Properties of Unsaturated Polymers

Yan

Cao

2023

Macromolecules

Self Cite

View full text Add to dashboard Cite

show abstract

“…Palladium nanoparticles were deposited onto carbon nanotube modified Fe doped ceramic foam forming a structured catalyst. The catalyst showed an outstanding catalytic activity could be ascribed to the accessible effective palladium active sites with high dispersion and enhanced adsorption of polystyrene chains onto the carbon nanotube surface [13].…”

Section: Carbon Nanotubes Supported Palladium Catalystmentioning

confidence: 99%