ATR-FTIR spectroscopy and chemometric techniques for determination of polymer solution viscosity in the presence of SiO2 nanoparticle and salinity

Mohammadi, Mahsa; Khorrami, Mohammadreza Khanmohammadi; Ghasemzadeh, Hossein

doi:10.1016/j.saa.2019.04.041

Cited by 42 publications

(13 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the FTIR pattern of LiTFSI sample, the characteristic peaks at 1051 and 1200 cm −1 correspond to the asymmetric stretching vibration of S─N─S bond and symmetrical stretching vibration of ─CF 3 functional group 19 . There is a broad peak at around 1070 cm −1 in the spectrum of SiO 2 sample, which corresponds to the Si─O─Si asymmetric stretching vibration 20 . With regard to the PPC sample, the characteristic peak at 1740 cm −1 is ascribed to the CO stretching vibration and both the characteristic peaks at 1230 cm −1 and 1065 cm −1 are attributed to the C─O─C stretching vibration 21 .…”

Section: Resultsmentioning

confidence: 98%

“…19 There is a broad peak at around 1070 cm −1 in the spectrum of SiO 2 sample, which corresponds to the Si─O─Si asymmetric stretching vibration. 20 With regard to the PPC sample, the characteristic peak at 1740 cm −1 is ascribed to the C O stretching vibration and both the characteristic peaks at 1230 cm −1 and 1065 cm −1 are attributed to the C─O─C stretching vibration. 21 Besides, the characteristic peaks at 1150 cm −1 and 1335 cm −1 for the LiTFSI salt are related to the bending vibrations of C─S─N bond.…”

Section: S 6 Diffusion Testingmentioning

confidence: 99%

See 1 more Smart Citation

A thermo‐stable poly(propylene carbonate)‐based composite separator for lithium‐sulfur batteries under elevated temperatures

et al. 2020

View full text Add to dashboard Cite

Lithium-sulfur (Li-S) batteries have a great potential for the future development of energy industry. However, the high-temperature performance of Li-S batteries is still facing great challenge due to the high flammability of the electrolyte, sulfur cathode as well as the separator. The separator modification is an effective method to improve the thermal stability of separator and the electrochemical performance of Li-S batteries under elevated temperatures. However, the reported methods of separator coating are too complicated to be applied in the industrial production. Here, a novel thermo-stable composite separator (M-Celgard-p), in which a layer of silicon dioxide-poly (propylene carbonate) based electrolyte (nano-SiO 2 @PPC) with a high ionic-conductivity of 1.03 × 10 −4 S cm −1 is coated on the commercial Celgard-p separator, is prepared by using a simple dipping method. Compared to the Li-S battery assembled with Celgard-p separator, the M-Celgard-p separator combined with a sulfur/polyacrylonitrile (S/PAN) cathode can improve the electrochemical performance of Li-S batteries, especially their high-temperature stability. As a result, the (S/PAN)/M-Celgard-p/Li cell delivers a high specific capacity of 724.7 mAh g −1 at 1.0 A g −1 after 200 cycles and presents a good rate capability of 1408 mAh g −1 at 1.0 A g −1 and 1216 mAh g −1 at 2.0 A g −1. More importantly, the (S/PAN)/M-Celgard-p/Li cell can exhibit a capacity retention ratio of 69.4% after 200 cycles at 60 C. The M-Celgard-p separator with high Li-ion conductivity can not only block the "shuttle-effect" of polysulfides during cycling but also enhance the thermal stability under elevated temperatures. This work presents a simple dipping method to prepare composite separator with excellent thermal stability, which enhance the rate performance and cyclic stability of Li-S batteries under elevated temperatures. We believe this work can provide a new way to develop more reliable Li-S batteries for practical applications.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: S 6 Diffusion Testingmentioning

confidence: 99%

A thermo‐stable poly(propylene carbonate)‐based composite separator for lithium‐sulfur batteries under elevated temperatures

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The sharp peak registered at 1030 cm −1 is assigned to the elongation of C–O groups ( Pereira et al, 2011 ). The FT-IR spectra of the films remained unchanged despite the SiO 2 load, except for the 1088 cm −1 peak, which is associated with the Si–O–Si bending vibrations ( Mohammadi et al, 2019 ), that increased in intensity with the increment of SiO 2 percentages in the films. The low concentrations of nano-SiO 2 and the overlap of this characteristic bands with those of alginate justify the few changes to the spectrum ( Júnior et al, 2021 ).…”

Section: Resultsmentioning

confidence: 98%

Improving the mechanical properties and thermal stability of sodium alginate/hydrolyzed collagen films through the incorporation of SiO2

Júnior

Rodrigues

Silva

et al. 2022

Current Research in Food Science

View full text Add to dashboard Cite

Biopolymer-based films have become leading alternatives to traditional fossil-based packaging plastics. Among the countless types of biopolymers with potential for such applications, films containing hydrolyzed collagen in their composition were scarcely explored. This study determined the effect of different loads of nano-SiO 2 (0, 2, 6, 8 and 10% w/w of sodium alginate) in the sodium alginate (SA) and hydrolyzed collagen (HC) blend films in terms of structure, thickness, mechanical properties, and thermal stability. The results indicated an improvement in the general mechanical and thermal behavior. Tensile strength increased from 18.2 MPa (control sample) to 25.4 MPa for the SA/HC film incorporated with 10% nano-SiO 2 . In the same condition, the film's elongation at break improved impressively (from 19.5 to 35.8%). Thermal stability improved slightly for all proportions of nano-SiO 2 . Therefore, the addition of nano-SiO 2 can be an easy and simple strategy to improve crucial properties of SA/HC blend films, increasing its performance for future application as sustainable packaging.

show abstract

“…This can be ascribed to that NaCl may reduce mass transfer by increasing the thickness of the Nernst diffusion layer [62]. Proper salinity would cause high ionic strength leading to the reduction of solubility of SUs in water and the increase of extraction on the membranes; however, the higher salinity would increase the viscosity of the solution resulting in the decrease of molecular mass transfer efficiency and extraction efficiency [63]. This phenomenon can be explained by that high concentrations of salt may block the pore passage, which hinders further mass transfer between the two phases [50].…”

Section: Effect Of Salinitymentioning

confidence: 99%

Preparation of mixed-matrix membranes from metal organic framework (MIL-53) and poly (vinylidene fluoride) for use in determination of sulfonylurea herbicides in aqueous environments by high performance liquid chromatography

et al. 2019

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Novel mixed-matrix membranes (MMM) were prepared from metal-organic frameworks (MOF) (MIL-53) and poly (vinylidene fluoride) (PVDF), viz MIL-53-PVDF MMM, for the simultaneous dispersion membrane extraction (DME) of seven sulfonylurea herbicides (SUs) in aqueous environments followed by high performance liquid chromatography (HPLC) determination. The MIL-53-PVDF MMM was well characterized and major factors influencing DME performances were systematically investigated including membrane type, MOF dosage, eluent type, solution pH, extraction/elution time and salinity, etc. Under optimal conditions, the MIL-53-PVDF MMM based DME coupled with HPLC exhibited excellent linearity within 0.03-10 lg L À1 for chlorimuronethyl and 0.01-10 lg L À1 for other six SUs individual. High enrichment factor of 250 was obtained, as well as low detection limits and quantification limits ranged from 3.75 to 10.30 ng L À1 and 12.49-34.30 ng L À1 , respectively. Furthermore, the method attained high recoveries of 77.20-111.00% at three spiking levels of SUs, with relative standard deviations of 1.28-14.67% in

show abstract

ATR-FTIR spectroscopy and chemometric techniques for determination of polymer solution viscosity in the presence of SiO2 nanoparticle and salinity

Cited by 42 publications

References 39 publications

A thermo‐stable poly(propylene carbonate)‐based composite separator for lithium‐sulfur batteries under elevated temperatures

A thermo‐stable poly(propylene carbonate)‐based composite separator for lithium‐sulfur batteries under elevated temperatures

Improving the mechanical properties and thermal stability of sodium alginate/hydrolyzed collagen films through the incorporation of SiO2

Preparation of mixed-matrix membranes from metal organic framework (MIL-53) and poly (vinylidene fluoride) for use in determination of sulfonylurea herbicides in aqueous environments by high performance liquid chromatography

Contact Info

Product

Resources

About