The structure of lignosulfonates for production of carbon catalyst support

Каримов, О Х; Тептерева, Г. А.; Четвертнева, И. А.; Мовсумзаде, Э. М.; Каримов, Э Х

doi:10.1088/1755-1315/839/2/022086

Cited by 7 publications

(5 citation statements)

References 9 publications

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“…This result aligns with the previous report [24] in Table 2. Sulfonation using sodium sulfite showed an absorption peak at 1192, 1663, and 1540 cm −1 , which indicates the sulfonate group, OH, and CH 3 groups following previous research [25][26][27]. Spectra of lignosulfonate appear in Fig.…”

Section: Isolation and Sulfonation Of Lignin Opefbsupporting

confidence: 70%

Utilization of Lignin and Lignosulfonate from Oil Palm Empty Fruit Bunches as Filler in PVDF Proton Exchange Membrane Fuel Cell

Mu'izzah,

Hapsari,

Aulia

et al. 2023

Indones. J. Chem.

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A study on the polyvinylidene fluoride (PVDF) membrane using lignin and lignosulfonate oil palm empty fruit bunch (OPEFB) fillers have been carried out. This study aims to determine the additional effect of lignin and lignosulfonate on PVDF membrane. Lignin sulfonation has a good result proven by Fourier transform infrared spectra with a peak at 1192 cm−1 which indicates sulfonate group. The sulfonation degree was increased by 8.9% for lignosulfonate. The membrane was prepared by the phase inversion method. Data present that all the membranes have an asymmetric structure with finger-like and sponge-like pores. Good thermal stability indicated by thermal gravimetric analysis showed degradation at 432 °C. The mechanical properties of the membrane decrease with the addition of filler. From the X-ray diffraction, peaks appeared at 18.39°, 21.35°, and 23.75° for all the membranes indicating of α and β phases. Lignin and lignosulfonate increased membrane hydrophilicity and water uptake. The presence of the sulfonate group increases the ionic exchange capacity and ionic conductivity up to 2.78 mmol/g and 9.95 × 10−5 S/cm, respectively, for 5% lignosulfonate addition. Thus, PVDF/lignosulfonate has the potential as a polymer electrolyte membrane.

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Section: Isolation and Sulfonation Of Lignin Opefbsupporting

confidence: 70%

Utilization of Lignin and Lignosulfonate from Oil Palm Empty Fruit Bunches as Filler in PVDF Proton Exchange Membrane Fuel Cell

Mu'izzah,

Hapsari,

Aulia

et al. 2023

Indones. J. Chem.

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“…The line observed at 1350 cm −1 is ascribed to C-O [31] and C-H [33] bonding. The band at 1420 cm −1 can be attributed to the vibrations of C-H3 [34], C-H2 [35], and C-O bonds [36]. The line centered at 1620 cm −1 is ascribed to C=C vibrations, featuring the position more typical for the olefinic groups rather than for aromatic rings [31], confirming that the sp 2 -hybridized component of the structure is present in the form of polyenic fragments rather than graphitic clusters or phenylic side groups One prominent difference between the obtained FTIR spectrum of the studied PVDC precursor and the spectrum of amorphous PVDC (Figure 4 in [26]) can be observed.…”

Section: Ftir Spectroscopymentioning

confidence: 99%

The Field-Effect Transistor Based on a Polyyne–Polyene Structure Obtained via PVDC Dehydrochlorination

et al. 2023

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We report on the formation of the field-effect transistor based on a polyyne–polyene structure. Polyvinylidene chloride (PVDC) drop casting and its subsequent dehydrochlorination in KOH solution allowed for the formation of porous polyyne–polyene material, which was analyzed via transmission electron microscopy, Fourier-transform infrared spectroscopy, and Raman spectroscopy, revealing the presence of sp- and sp2-hybridized chained fragments in the structure. The polyyne–polyene-based field-effect transistor showed a transconductance of 3.2 nA/V and a threshold voltage of −0.3 V. The obtained results indicate that polyyne–polyene-based transistors can be used as discrete elements of molecular electronics and that subsequent studies can be aimed toward the development of selective polyyne–polyene-based gas sensors with tunable sensitivity.

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“…The choice of the base used in the process affects the chemical reactivity of the lignosulfonates towards further modifications-ammonium lignosulfonate has the highest reactivity, whereby calcium-based compounds are the least active [14,15]. Lignosulfonates also show promise in catalytic studies as catalyst carriers [16].…”

Section: Introductionmentioning

confidence: 99%

Chemical Transformation of Lignosulfonates to Lignosulfonamides with Improved Thermal Characteristics

Komisarz

Majka

2022

Fibers

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Lignin is an abundantly occurring aromatic biopolymer that receives increasing attention as, e.g., a biofiller in polymer composites. Though its structure depends on the plant source, it is a valuable component showing biodegradability, antioxidant, and ultra-violet (UV) absorption properties. Lignosulfonates, a by-product of the paper and pulping industries formed as a result of the implementation of the sulfite process, have been used in the presented study as a raw material to obtain a sulfonamide derivative of lignin. Hereby, a two-step modification procedure is described. The obtained materials were investigated by means of FTIR, WAXD, SS-NMR, SEM, and TGA; the results of spectroscopic investigations confirm the formation of a sulfonamide derivative of lignin via the proposed modification method. The obtained modified lignin materials showed significantly improved thermal stability in comparison with the raw material. The internal structure of the lignosulfonate was not altered during the modification process, with only slight changes of the morphology, as confirmed by the WAXD and SEM analyses. The manufactured sulfonamide lignin derivatives show great promise in the potential application as an antibacterial filler in advanced biopolymeric composites.

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The structure of lignosulfonates for production of carbon catalyst support

Cited by 7 publications

References 9 publications

Utilization of Lignin and Lignosulfonate from Oil Palm Empty Fruit Bunches as Filler in PVDF Proton Exchange Membrane Fuel Cell

Utilization of Lignin and Lignosulfonate from Oil Palm Empty Fruit Bunches as Filler in PVDF Proton Exchange Membrane Fuel Cell

The Field-Effect Transistor Based on a Polyyne–Polyene Structure Obtained via PVDC Dehydrochlorination

Chemical Transformation of Lignosulfonates to Lignosulfonamides with Improved Thermal Characteristics

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