Catalytic effect of bases in impregnation of guanidine nitrate on Poplar (Populus) wood

Arora, Sanjiv; Kumar, Mahesh; Kumar, Mahender

doi:10.1007/s10973-011-1779-z

Cited by 20 publications

(11 citation statements)

References 23 publications

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“…Moreover, more BL-flame-retardant molecules took precedence over the dye molecules and occupied cell cavities, the wood vessel, and the aperture [36]. Furthermore, more oxygen was necessary to keep the samples burning at higher LOI values, indicating enhanced fire-retardant properties [40][41][42]. In short, the fire-retardant properties of wood samples simultaneously treated with acid red GR dye and BL-flame retardant was improved compared to untreated wood.…”

Section: Limited Oxygen Indexmentioning

confidence: 99%

Surface free energy and dynamic wettability of wood simultaneously treated with acidic dye and flame retardant

Wang

et al. 2017

J Wood Sci

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The use of multifunctional wood for decorative purpose has grown increasingly popular in recent years. In this study, fast-growing poplar wood was treated with dye (0.5%) and flame retardant (0, 10, 20, and 30%) simultaneously to enhance its visual characteristic and safety. The dynamic wettability and surface free energy of wood samples were studied using S-D wetting model and van Oss-Chaudhury-Good (vOCG) method, respectively. Dye uptake, drug load, color difference, and combustion performance were determined. The treated wood was also characterized by infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The results indicated that the proposed treatment yields favorable adhesive spreading and penetration ability at the wood surface. The surface free energy of treated wood was higher than that of untreated wood, and the dye uptake, drug load, color difference, and limited oxygen index all increased after the proposed combination treatment compared to dyeonly treated wood. The results also indicated that the flame retardant reacted chemically with the wood as the dye and flame retardant molecules diffused into the cell cavity, wood vessel, and aperture.

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Section: Limited Oxygen Indexmentioning

confidence: 99%

Surface free energy and dynamic wettability of wood simultaneously treated with acidic dye and flame retardant

Wang

et al. 2017

J Wood Sci

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“…TG data was used in MS Excel software to appraise activation energy (E a ) and correlation coefficient (R 2 ) of most potent compound 4k. The E a values of the most potent compound 4k was calculated by "model free" methods namely, Ozawa-Flynn-Wall (O-F-W) 13,14 , Coats-Redfern (modified) 15 and Friedman 16 as described in our research studies 17,18 .…”

Section: Non-isothermal Model Free Kinetic Methodsmentioning

confidence: 99%

Thermal Studies of Some Biological Active Bis[1,2,4]triazolophthalazines: Non Isothermal Kinetic Study of one of the Potent 3,6-Bis(4-nitrophenyl) bis([1,2,4]triazolo)[3,4-a:4,3-c]phthalazine

2013

Chem Sci Trans

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Thermal decomposition studies of twelve bis-1,2,4-triazolophthalazines (4a-l) have been investigated using TG and DSC techniques under argon atmosphere at a heating rate of 10 °C min-1. TG study shows that all halogen substituted compounds (4e-j) are thermally most stable except 4f. Mass percentage residues left at 550 °C lie in the range 29-52%. This shows that compounds are thermally stable at high temperatures. DSC curve shows two peaks except for 4c and 4d which are showing three DSC peaks degradation. Second peak of most of the compounds and third DSC peak of 4c-d shows exothermic decomposition. Activation energy calculated by model free methods for compound 4k show dependence on conversion value. Activation energy at conversion 0.8 for this compound is around 562.6 kJ mol-1 .

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“…TG, DTG data have great importance to evaluate the flame retardancy of samples 18 . The two parameters like maximum mass loss rate (MMLR) from DTG and char yield have premeditated from TG curves are used to evaluate flame retardancy character of samples.…”

Section: Thermal Analysismentioning

confidence: 99%

Model free Multiple Heating Rate Degradation Kinetic Studies of Modified Celluloses

Kumar¹,

Kumar²,

Lal³

et al. 2015

Chem Sci Trans

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Abstract:The present paper depicts about the synthesis of cellulose ethyl ammonium thiophosphate (CEASP) and its metal complexes with Cd, Mo and Ce. CEASP and its metal complexes have been characterized by infrared (IR), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDXS) studies. The surface morphology of samples has been premeditated by means of scanning electron microscopy (SEM). The thermal studies of samples have been carried out at multiple heating rates 2, 5, 10 and 20 °C min -1 from ambient to 700 °C in nitrogen atmosphere. Nonisothermal model free kinetic methods have been used to calculate activation energy of samples i.e. Friedman, Ozawa-Flynn-Wall (O-F-W) and modified Coats-Redfern. The activation energy of samples lie in range 72-282 kJ mol -1 . Thermal study shows that initial degradation temperature of CEASP and its metal complexes decreases and there is abrupt increase in char yield of synthesized samples as compared to pure cellulose. These and other related information suggest that such type of derivatisation could be proved a good flame retardant for cellulose.

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Catalytic effect of bases in impregnation of guanidine nitrate on Poplar (Populus) wood

Cited by 20 publications

References 23 publications

Surface free energy and dynamic wettability of wood simultaneously treated with acidic dye and flame retardant

Surface free energy and dynamic wettability of wood simultaneously treated with acidic dye and flame retardant

Thermal Studies of Some Biological Active Bis[1,2,4]triazolophthalazines: Non Isothermal Kinetic Study of one of the Potent 3,6-Bis(4-nitrophenyl) bis([1,2,4]triazolo)[3,4-a:4,3-c]phthalazine

Model free Multiple Heating Rate Degradation Kinetic Studies of Modified Celluloses

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