scholarly journals Effect of Swelling on Carbon Dioxide Adsorption by Poly(Ionic Liquid)s

2012 ◽  
Vol 30 (1) ◽  
pp. 35-41 ◽  
Author(s):  
Jia M. Zhu ◽  
Kai G. He ◽  
Hu Zhang ◽  
Feng Xin

A two-step swelling method was used for preparing porous poly(ionic liquid)s based on the copolymer of 1-allyl-3-methylimidazolium tetrafluoroborate and acrylonitrile P([AMIM]BF4-AN), the copolymer of 1-allyl-3-methylimidazolium hexafluorophosphate and acrylonitrile P([AMIM]PF6-AN), and poly(vinylbenzyl trimethylammonium) tetrafluoroborate P[VBTMA]BF4. The characteristics of the polymers were assessed via FT-IR spectroscopy, scanning electron microscopy (SEM) and CO2 adsorption. The results indicated that the seed-swelling method was more effective in improving the CO2 adsorption capacity of imidazolium-based P([AMIM]BF4-AN) containing the [BF4]− anion. Exchanging [BF4]− for [PF6]− in the imidazolium-based poly(ionic liquid) led to almost the same CO2 adsorption as exhibited by the corresponding non-swelling copolymer. Moreover, the CO2 adsorption capacity of ammonium-based P[VBTMA]BF4 when treated by the seed-swelling method decreased considerably.

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 370 ◽  
Author(s):  
Guangyuan Yang ◽  
Jialin Yu ◽  
Sanwen Peng ◽  
Kuang Sheng ◽  
Haining Zhang

The design and synthesis of solid sorbents for effective carbon dioxide adsorption are essential for practical applications regarding carbon emissions. Herein, we report the synthesis of composite materials consisting of amine-functionalized imidazolium-type poly(ionic liquid) (PIL) and metal organic frameworks (MOFs) through complexation of amino groups and metal ions. The carbon dioxide adsorption behavior of the synthesized composite materials was evaluated using the temperature-programmed desorption (TPD) technique. Benefiting from the large surface area of metal organic frameworks and high carbon dioxide diffusivity in ionic liquid moieties, the carbon dioxide adsorption capacity of the synthesized composite material reached 19.5 cm3·g−1, which is much higher than that of pristine metal organic frameworks (3.1 cm3·g−1) under carbon dioxide partial pressure of 0.2 bar at 25 °C. The results demonstrate that the combination of functionalized poly(ionic liquid) with metal organic frameworks can be a promising solid sorbent for carbon dioxide adsorption.


2008 ◽  
Vol 66 (2) ◽  
pp. 260-265 ◽  
Author(s):  
Jamil R. Memon ◽  
Saima Q. Memon ◽  
M.I. Bhanger ◽  
G. Zuhra Memon ◽  
A. El-Turki ◽  
...  

2017 ◽  
Vol 316 ◽  
pp. 903-910 ◽  
Author(s):  
Jiao Yuan ◽  
Meiling Fan ◽  
Fangfang Zhang ◽  
Yusu Xu ◽  
Haolin Tang ◽  
...  

2012 ◽  
Vol 1 (8) ◽  
pp. 1028-1031 ◽  
Author(s):  
Antje Wilke ◽  
Jiayin Yuan ◽  
Markus Antonietti ◽  
Jens Weber

2004 ◽  
Vol 18 (4) ◽  
pp. 553-565 ◽  
Author(s):  
Nenad Ignjatovic ◽  
Dragan Uskokovic

Due to its pronounced osteoinductive properties, calcium hydroxyapatite (HAp) has been widely used in medicine. Bioresorptive poly-L-lactide (PLLA) as a polymer biomaterial has been also used extensively in medicine for its non-toxicity and biocompatibility. To combine the advantages exhibited by each of these materials, a HAp/PLLA composite biomaterial has been synthesized and used for reconstruction and repair of bone defects. Hydroxyapatite/poly-L-lactide (HAp/PLLA) composite biomaterial with PLLA of 50,000 and 430,000 g/mole molecular weight was studiedin vivo. The biocomposite with PLLA of both molecular weights was implanted into mice, then removed from their organisms and analyzed by the Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) and histopathologic analysis. Characteristic absorption bands, registered and defined by FT-IR spectroscopy, confirm the formation of new functional groups and compounds during the bone repair process using HAp/PLLA biocomposite with PLLA of 50,000 and 430,000 molecular weights. Analysis of the microstructures of the sample surfaces by scanning electron microscopy (SEM) before and after implantation revealed bioresorption of the PLLA polymer phase in the system with PLLA of lower molecular weight and generation of collagen fibers at the sites of implanted bioresorptive PLLA. As the studied synthetic materials behave as the natural bone, i.e., they are phagocytosed and resorpable, they can be considered as biocompatible.


2011 ◽  
Vol 306-307 ◽  
pp. 297-300
Author(s):  
Yu He ◽  
Wen Juan Guo ◽  
Guang You Zhang ◽  
Mei Shan Pei ◽  
Qi Wei Pan

Poly(N-(9-fluorenylmethoxycarbony)-glycine) (PFG) film was first synthesized on platinum wire by direct anodic oxidation of N-(9-fluorenylmethoxycarbony)-glycine (FG) in boron trifluoride diethyl etherate (BFEE). The oxidation potential of FG in BFEE was only 0.4 V vs. Pt. Therefore, BFEE can be an ideal supporting electrolyte for polymerization of FG. Scanning electron microscopy showed the morphology of PFG. The structure of PFG film was studied by FT-IR spectroscopy.


ChemPlusChem ◽  
2019 ◽  
Vol 84 (3) ◽  
pp. 281-288 ◽  
Author(s):  
Na Li ◽  
Rong Qu ◽  
Xiaoyu Han ◽  
Weiran Lin ◽  
Haining Zhang ◽  
...  

2015 ◽  
Vol 33 (3) ◽  
pp. 537-540 ◽  
Author(s):  
Anukorn Phuruangrat ◽  
Budsabong Kuntalue ◽  
Titipun Thongtem ◽  
Somchai Thongtem

Abstract Shuttle-like BaMoO4 microstructure has been successfully synthesized from Ba(N03)2·4H20 and Na2MoO4·2H2O as starting materials in ethylene glycol solvent containing 20 mL 5 M NaOH by microwave radiation at 180 W for 30 min. The as- synthesized BaMoO4 product was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, Raman spectrophotometry, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photolumines­cence (PL) spectroscopy. XRD patterns revealed that the products was tetragonal BaMoO4 phase. SEM and TEM characteriza­tion showed that the product had a shuttle-like BaMoO4 microstructure. PL of the shuttle-like BaMoO4 microstructure showed a maximum emission at 466 nm excited by 280 nm wavelength.


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