Structural changes in polyacrylonitrile fibre modified with hydrazine hydrate

Khudoshev, I. F.; Litovchenko, G. D.

doi:10.1007/bf00548888

Cited by 1 publication

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cross-linking extent of the precursor fiber is elevated with HH concentration (Figure S2). Reactions take place between the nitrile groups, and new bonds are formed. , Nitrogen in the bonds between PAN and hydrazine is less stable than that in ladder polymers, indicated by a larger loss in weight observed in HH treated fibers (Figure S3). Similar weight loss was also observed in hydrazine modified PAN .…”

Section: Resultsmentioning

confidence: 99%

“…Reactions take place between the nitrile groups, and new bonds are formed. , Nitrogen in the bonds between PAN and hydrazine is less stable than that in ladder polymers, indicated by a larger loss in weight observed in HH treated fibers (Figure S3). Similar weight loss was also observed in hydrazine modified PAN . Hence, it is easier to eliminate the former kind of nitrogen than the latter at high temperature treatment.…”

Section: Resultsmentioning

confidence: 99%

“…Similar weight loss was also observed in hydrazine modified PAN. 34 Hence, it is easier to eliminate the former kind of nitrogen than the latter at high temperature treatment. When the concentration of hydrazine hydrate increases, more nitrile groups on the polymer chains react with hydrazine, thus more nitrogen is eliminated at the carbonization process.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Nitrogen-Enriched Porous Polyacrylonitrile-Based Carbon Fibers for CO₂ Capture

Wang

Zhong

et al. 2018

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Utilizing porous polyacrylonitrile (PAN) fibers as the precursors, porous carbon fibers were obtained by cross-linking of precursor fibers with hydrazine hydrate and subsequent heat treatment. A nitrogen content of more than 14 wt % was achieved in the carbon fibers. The porous carbon fiber that was prepared at low concentration of hydrazine hydrate (5 wt %) showed an optimal BET surface area of 277.4 m 2 /g with micro-/meso-/macropores. The CO 2 adsorbed amount of this porous carbon fiber was 101 mg/g at 25 °C under atmospheric pressure, which was 2.1 times that of the fiber without cross-linking with hydrazine hydrate. In the simulated flue gas environment (10% CO 2 /90% N 2 ), the adsorption capacity of the above-mentioned porous fiber was 32 mg/g at 25 °C, which was 1.4 times that of the fiber without cross-linking. These CO 2 adsorption results demonstrated that the nitrogen functionalities and porous structure of the porous carbon fiber played an equivalent important role in the adsorption of CO 2 . The porous carbon fiber also owned an excellent CO 2 reusability, and 96% of the adsorption capacity was maintained after 20 cycles of CO 2 adsorption and desorption. The porous carbon fibers enriched with nitrogen could thus be a potential material for CO 2 capture.

show abstract

Section: Resultsmentioning

confidence: 99%