Transformation details of poly(acrylonitrile) to poly(amidoxime) during the amidoximation process

Shao, Dadong; Hou, Guangshun; Chi, Fangting; Lu, Xirui; Ren, Xuemei

doi:10.1039/d0ra09096d

Cited by 24 publications

(8 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The XRD spectra of PAN, PAA, AUN, and H‐AUN are given in Figure 2b. The diffraction peaks of PAN at 2θ of 17° and 29° belonged to diffractions of (010) and (300) crystal planes, respectively [19] . Compared to PAN, the degree of crystallization of AUN slightly decreased from 22.47 % to 17.84 % with the unchanged crystal structure.…”

Section: Resultsmentioning

confidence: 94%

“…The diffraction peaks of PAN at 2θ of 17°and 29°b elonged to diffractions of (010) and (300) crystal planes, respectively. [19] Compared to PAN, the degree of crystallization of AUN slightly decreased from 22.47 % to 17.84 % with the unchanged crystal structure. Intriguingly, only a diffuse broad peak at around 23°of H-AUN indicated the amorphous form in the whole sample.…”

Section: Xrd and Dsc Analysismentioning

confidence: 92%

See 1 more Smart Citation

Cross‐Linked Amidoximated Poly(acrylonitrile‐acrylic acid) Microspheres with Exceptional Adsorption Capacity, Reusability towards Copper(II): Batch and Column Studies

et al. 2022

View full text Add to dashboard Cite

s: Acrylonitrile‐based adsorbents are effective candidates for metal ions removal from wastewater. However, their performance is often limited by their unsatisfied stability, reusability, and sorption efficiency. In this contribution, the amino group of urea was cross‐linked with the carboxyl group of the firstly formed AN (acrylonitrile) and AA (acrylic acid) copolymer to improve the strength, while the cyanide group of AN was dedicatedly reacted with hydroxylamine hydrochloride to obtain an amidoxime group endowing the strong adsorption capacity for Cu (II). The optimum adsorption conditions of the as‐prepared adsorbent for Cu (II) were at 25 °C and pH 7, which only consumed 60 min to reach the adsorption equilibrium. The theoretical maximum adsorption capacity was 176.717 mg g−1. The amidoxime group on the surface of the adsorbent was inherently entitled to the outstanding adsorption capacity. Langmuir and pseudo‐second‐order model fitted the adsorption process. Furthermore, there still retained 84.4 % of the original adsorption capacity after seven cycles. Under column adsorption, the adsorbed particles were surprisingly lumped together, which can be easily taken out entirely after adsorption for recycling collection. Overall, the obtained acrylonitrile‐based adsorbents, easily regenerated with high performance and excellent sorption efficiency, should be a promising sorbent.

show abstract

Section: Resultsmentioning

confidence: 94%

Section: Xrd and Dsc Analysismentioning

confidence: 92%

Cross‐Linked Amidoximated Poly(acrylonitrile‐acrylic acid) Microspheres with Exceptional Adsorption Capacity, Reusability towards Copper(II): Batch and Column Studies

et al. 2022

View full text Add to dashboard Cite

show abstract

“…3 C) was divided into three peaks. The peaks at 398.80, 399.45, and 400.40 eV were consistent with –C ≡ N, undoped amine-like N atoms (N–H), and –C(NH 2 ) = NOH, respectively [ 24 ]. According to the fitting results of N 1s XPS spectrum (Table 2 ), the peak fraction corresponding to –C ≡ N was neglectable, and N–H and –C(NH 2 ) = NOH were the dominant N species on PAO/FMs surface.…”

Section: Resultsmentioning

confidence: 97%

Application of poly(amidoxime)/scrap facemasks in extraction of uranium from seawater: from dangerous waste to nuclear power

Zhang

Ouyang

Hou

et al. 2022

J Radioanal Nucl Chem

Self Cite

View full text Add to dashboard Cite

To effectively kill microorganisms on scrap facemasks (FMs) surface and provide new material for extracting uranium (U(VI)) from seawater, scrap FMs was treated by N 2 capacitance coupled (CCP) plasma and modified with polyamidoxime (PAO). The obtained PAO/FMs was well characterized and applied as an adsorbent in the extraction of U(VI) from seawater. The effects of environmental conditions on the adsorption capability of PAO/FMs for U(VI) were briefly studied. Results showed that plasma technique can synchronously kill microorganisms and induce acrylonitrile (AN) polymerization on FMs surface. The prepared PAO/FMs presented excellent adsorption capability for U(VI). The experimental results highlighted the application of plasma technique in the management of scrap FMs, and PAO/FMs in the extraction of U(VI) from seawater.

show abstract

“…The three selected phenols could react with tetrafluoroterephthalonitrile (TFTPN) to form PAE with different stereostructures. The nitrile groups in these PAEs were then transformed into amidoxime (Scheme ) according to methods previously reported. ,− The structure of the PAE-based COPs varies from different crosslinked construction, providing a good chance for us to study the relationship between the material design and capability in the extraction and detection of uranium systematically. The obtained amidoximized COPs showed good capability in fluorescence detection and extraction of uranium.…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of Hypercrosslinked Covalent Organic Adsorbents for Selective Uranium Extraction

Leng

Sun

Wang

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

Uranium detection and extraction are necessary for the ecological environment as the growing demand for nuclear energy. Hence, exploring stable materials with excellent performance in uranium extraction and detection is highly desired. Herein, by amidoxime-functionalizing tetrafluoroterephthalonitrile (TFTPN) crosslinked hydroquinone (bP), phloroglucinol (tP), and 4,4′,4″-trihydroxytriphenylmethane (tBP), three covalent organic polymers (COPs) bPF-AO, tPF-AO, and tBPF-AO with different crosslinked architectures are fabricated. Uranium extraction and detection related to the difference in molecule construction were systemically investigated, giving some reference for the rational design and fabrication of advanced materials for the removal and monitoring of uranium in the environment. The tPF-AO with a compact steric structure achieves the highest theoretical maximum adsorption capacity of 578.9 ± 15.2 mg g −1 and the best recyclability. The scattering electron center and U(VI) selective binding sites endow tBPF-AO with excellent capability in selective detection for U(VI), with a limit of detection of 24.2 nmol L −1 , which is well below the standard for U(VI) in drinking water of the World Health Organization (WHO). Moreover, the COPs possess prominent physicochemical stability and recyclability, and more importantly, the PAE-based COPs are derived from inexpensive industry materials with easy processing methods, providing an efficient and economical way for the detection and adsorption of uranium.

show abstract

Transformation details of poly(acrylonitrile) to poly(amidoxime) during the amidoximation process

Abstract: During the amidoximation process, transformation details of poly(acrylonitrile) (PAN) to poly(amidoxime) (PAO) is critical for optimizing amidoximation conditions, which determine the physicochemical properties and adsorption capabilities of PAO-based materials.

Cited by 24 publications

References 37 publications

Cross‐Linked Amidoximated Poly(acrylonitrile‐acrylic acid) Microspheres with Exceptional Adsorption Capacity, Reusability towards Copper(II): Batch and Column Studies

Cross‐Linked Amidoximated Poly(acrylonitrile‐acrylic acid) Microspheres with Exceptional Adsorption Capacity, Reusability towards Copper(II): Batch and Column Studies

Application of poly(amidoxime)/scrap facemasks in extraction of uranium from seawater: from dangerous waste to nuclear power

Design and Fabrication of Hypercrosslinked Covalent Organic Adsorbents for Selective Uranium Extraction

Contact Info

Product

Resources

About