scholarly journals SINTESIS KOMPOSIT SELULOSA SERBUK GERGAJI KAYU KAMPER-LIMBAH PLASTIK LDPE (LOW DENSITY POLIETHYLENE) DENGAN REAGEN FENTON SEBAGAI AGEN PENGKOPLING

Jurnal Kimia ◽  
2016 ◽  
Author(s):  
Hudi Nurwendi ◽  
I Nengah Simpen ◽  
I Made Sutha Negara
Keyword(s):  
Functional Groups ◽  
Physical Property ◽  
Modulus Of Rupture ◽  
H2o2 Concentration ◽  
Ftir Analysis ◽  
Fenton Reagent ◽  
Wood Sawdust ◽  
Cellulose Composites ◽  
Reagent Characterization ◽  
Waste Cellulose

This research was on the synthesis of cellulose composites from camphor wood sawdust with LDPE waste (cellulose-LDPE) and Fenton reagent (H2O2/Fe2+) as the coupling agent. This study was divided into three steps: preparation, variation of LDPE composition and H2O2 concentration, and characterization. Preparation was done with cellulose extraction of sawdust and LDPE plastic waste purification. Variation was performed to determine the effect of compositions of LDPE on composites celullose-LDPE and H2O2 concentration on Fenton reagent. Characterization was done by testing the physical properties and functional groups using FTIR analysis. The best values of the physical property were obtained from cellulose-LDPE composition ratio of 1:5 on 1.5% H2O2. These were MOE (Modulus of Elasticity) of 12.71 MPa, MOR (Modulus of Rupture) of 200.24 MPa and density of 0.7936 g/cm. FTIR analysis showed the higher the composition of LDPE, the higher the wavenumber for OH and the increase of H2O2 concentration increased the C-H wavenumber functional groups.

A comparison of antioxidant and Fourier Transform Infrared Spectroscopy (FTIR) analysis on extracts of Syzygium guineenses (Myrtaceae)

2019 ◽  
Vol 1 (2) ◽  
pp. 1-7
Author(s):  
O.O. Shonekan ◽  
◽  
A.C. Otuka ◽  
D.K. Adeyemi ◽  
O.T. Fatunsin ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Functional Groups ◽  
Methanol Extract ◽  
Antioxidant Activities ◽  
Fourier Transform Infrared ◽  
Hexane Extract ◽  
Ftir Analysis ◽  
Dot Blot ◽  
Absorption Bands ◽  
Yellow Colour

Background: Syzygium guineenses, (the most common and abundant specie in Nigeria) is a medicinal plant used by traditional practitioners in northern Nigeria for a variety of healing purposes. Objective: The main objective of this project was to carry out a comparison of antioxidant activities and Fourier Transform Infrared Spectrophotometric (FTIR) analysis on both methanol and hexane leaf extracts of S. guineenses. Methods: Phytochemical screening, Semi-quantitative DPPH (1,1-diphenyl-2-picrylhydrazyl)- dot blot assay and FTIR analysis were performed on both extracts to determine antioxidant activity and identify the functional groups present. Results: Phytochemicals tested for, were observed to be more prominent in the methanol extract than hexane. The in vitro antioxidant assay also revealed a more intense yellow colour of inhibition in methanol extract than the hexane extract. The FTIR spectra revealed different characteristic peak values with various functional compounds in both extracts. The methanol extract displayed major peaks of absorption at 3341 cm-1 (-OH) for alcohol, 1736 cm-1 (C=O) carbonyl group, 1161.83 cm-1, 1036.49 cm-1 (C-O) of esters. Other absorption bands like 1452.25 cm-1 and 1612.20 cm-1 for alkenes were present in both extracts. Conclusion: This result shows that the methanol extract of S. guineenseshas a higher potential of phytochemicals, antioxidants and functional groups than the hexane extract.

Research on FTIR Analysis of Populus nigra L. Lignin Structure Changes in Different Bleaching Processes

2011 ◽  
Vol 236-238 ◽  
pp. 1283-1287
Author(s):  
Qiang Zhao ◽  
De Zhi Sun ◽  
Jun Wen Pu ◽  
Xiao Juan Jin ◽  
Mian Xing
Keyword(s):  
Carbonyl Group ◽  
Functional Groups ◽  
Populus Nigra ◽  
Side Chain ◽  
Ftir Analysis ◽  
Bleaching Process ◽  
Ether Bond ◽  
Bleaching Efficiency ◽  
Structure Changes ◽  
Alcoholic Hydroxyl

To study the bleaching mechanisms of H2O2 bleaching, H2O2 displacement bleaching and H2O2 /TAED bleaching, three kinds of lignin bleached with above processes were obtained. Three types of treated Populus nigra L lignins structure were identified and the functional groups were quantitied by FTIR. In contrast, the deacetylation and the breakage of ester bonds in H2O2/TAED bleaching system was much more significant. The total carbonyl group of H2O2 bleached lignin decreased 6.6% while displacement bleached lignin and H2O2/TAED bleached lignin decreased 9.2% and 15.8% respectively. The PT bleaching process had stronger oxidability to destroy the syringyl units in lignin. The breakage of ether bonds and alcoholic hydroxyl dehydration in side chain increased after bleaching. In contrast, the stronger destroyed effection on guaiacyl dialkyl ether bond with PT bleaching processes. The conclusions obtained may interpret H2O2 displacementbleaching and H2O2/TAED bleaching systems have better bleaching efficiency than H2O2 bleachingsystem.

Resin-Wood Particulate Composite Reinforced with Piassava Fibre

2015 ◽  
Vol 1088 ◽  
pp. 415-418
Author(s):  
André Luis Christoforo ◽  
Francisco Antonio Rocco Lahr ◽  
Cristiane Inácio de Campos ◽  
Elen Aparecida Martines Morales ◽  
Juliana Cortez Barbosa ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Hybrid Composite ◽  
Mass Fraction ◽  
Physical And Mechanical Properties ◽  
Particulate Composite ◽  
Modulus Of Rupture ◽  
Casting Method ◽  
Wood Sawdust ◽  
The One

These research objectives the development and evaluation of physical and mechanical properties of a hybrid composite manufactured epoxy resin reinforced by Eucalipto sp. wood sawdust and treated piassava fibers. The evaluated properties were modulus of elasticity (MOE) and modulus of rupture (MOR) in static bending, water absorption after 24 hours, porosity and apparent density. Three factors with two levels was evaluated: thickness (3 mm and 4 mm), volumetric resin fraction (45% and 50%) and the use or not of laminate piassava fibers reinforcement, leading to a factorial design of 23 type. Were manufactured four panels, two with 50% and two with 55% of resin, using casting method. For the physical and mechanical properties obtained, the better conditions were the one that uses 50% of epoxy resin, 55% sawdust mass fraction and with the use of laminated piassava fibers reinforcement. The thickness was not statistically significant in obtaining the properties evaluated.

scholarly journals DEKOLORISASI AIR LIMBAH PENGOLAHAN GURITA MENGGUNAKAN METODE AOT(ADVANCE OXIDATION TREATMENT) DENGAN REAGEN FENTON

2018 ◽  
Vol 3 (1) ◽  
pp. 6
Author(s):  
Ganden Supriyanto ◽  
Khoirun Nisak R ◽  
Abdulloh Abdulloh
Keyword(s):  
Key Words ◽  
Hydroxyl Radicals ◽  
Main Parameter ◽  
Advanced Oxidation ◽  
H2o2 Concentration ◽  
Fenton Reagent ◽  
Oxidation Treatment ◽  
Maximum Decolorization

ABSTRACT This research aims to determine the effectiveness of Advance Oxidation Treatment (AOT) method with the use of Fenton reagent in decolorization of octopus canning wastewater’s red colour. The use of Fenton reagent (H2O2 and Fe2+) will produce hydroxyl radicals (∙OH) that will oxidize the red colour so the octopus canning wastewater to be colourless and safe to discharged into the environment. Determination of octopus canning wastewater's decolorization is done by determining the change of red color's intensity using Pt/Co scale. The main parameter in determining the decolorization of octopus canning wastewater using Advanced Oxidation Treatment (AOT) with Fenton reagent are time, concentration of Fe2+, concentration of H2O2, and pH. The maximum decolorization of octopus canning wastewater was reached at following condition rarely 55 minutes, with Fe2+ concentration of 42,86 ppm, H2O2 concentration of 85,71 ppm, and pH 4. With a capacity of red color’s decolorization is 49,08 %. Key words : Advance Oxidation Treatment (AOT), decolorization, Fenton reagent    ABSTRAK Penelitian ini bertujuan untuk mengetahui efektifitas metode Advance Oxidation Treatment  (AOT)  dengan menggunaan reagen Fenton dalam mendekolorisasi warna merah yang terdapat dalam air limbah pengolahan gurita. Penggunaan reagen Fenton (H2O2 dan Fe2+) akan menghasilkan radikal hidroksil (∙OH) yang bisa menghilangkan warna merah yang terdapat di dalam limbah sehingga limbah menjadi tidak berwarna dan aman untuk dibuang ke lingkungan. Penentuan dekolorisasi air limbah pengolahan gurita dilakukan dengan menentukan perubahan intensitas warna merah menggunakan skala Pt/Co. Parameter utama yang digunakan dalam metode Advance Oxidation Treatment  (AOT) adalah waktu, konsentrasi Fe2+, konsentrasi H2O2, dan pH. Hasil optimum dari dekolorisasi air limbah pengolahan gurita adalah pada waktu 55 menit, konsentrasi Fe2+ 42,86 ppm, konsentrasi H2O2 85,71 ppm, dan pH 4. Dengan kapasitas dekolorisasi warna merah sebesar 49,08 %. Kata kunci  : Advance Oxidation Treatment  (AOT), dekolorisasi, reagen Fenton 

scholarly journals FTIR analysis and the effects of alkyd/melamine resin ratio on the properties of the coatings

2009 ◽  
Vol 63 (6) ◽  
pp. 637-643 ◽  
Author(s):  
Suzana Cakic ◽  
Ljiljana Boskovic
Keyword(s):  
Ir Spectroscopy ◽  
Functional Groups ◽  
Curing Temperature ◽  
Ftir Analysis ◽  
Curing Time ◽  
Melamine Resin ◽  
Coating Properties ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Alkyd/melamine resin mixtures are mainly used in industrial baking enamels. The effects of the alkyd/butylated melamine resin ratio (from 90/10 to 50/50) and curing temperature (from 110 to 180?C) on the crosslinking and properties of the coating are presented in this paper. The curing reactions through functional groups of resins were monitored by FT-IR spectroscopy. The hardness, elasticity, degree of adherence and gloss were also determined. Optimal coating properties could be achieved with an alkyd/melamine resin ratio of 80/20, a curing temperature of 150?C and a curing time of 20 min.

scholarly journals Studies on Contributions of FTIR Spectroscopic analysis in the Puriৎication process of Veeram (Hg2Cl2) used in Siddha formulations

2020 ◽  
Vol 11 (SPL4) ◽  
pp. 1251-1259
Author(s):  
Madhavan R ◽  
Muthukumar N J ◽  
Savariraj Sagayam C ◽  
Rajalakshmi P ◽  
Brindha P
Keyword(s):  
Rheumatoid Arthritis ◽  
Ftir Spectroscopy ◽  
Functional Groups ◽  
Spectroscopic Analysis ◽  
Lemon Juice ◽  
Ftir Analysis ◽  
Chemical Formula ◽  
Chemical Changes ◽  
Before And After ◽  
Tender Coconut

In Siddha system Arsenics are called as Paasaanam (toxins). Veeram is one of the paasaanam, its chemical formula is Hg2Cl2 (Calomel). Internally arsenic based medicines are used for rheumatoid arthritis, generalized body pain, syphilis, epilepsy and cancer.Various organic agents are used to purify the veeram such as milk, tender coconut, bitter guard and lemon juice. In this study raw veeram and products obtained after purification were analyzed using FTIR Spectroscopy with a view to understand the need and mechanism of this purification processes. FTIR analysis was carried out before and after purification. Efforts were made to study various chemical changes veeram undergoes during this process. FTIR of the raw Veeram and its processed samples were recorded between 4000-400cm-1. In the study raw drug showed only nine functional groups in the region between 3789.36cm-1 and 468.75cm-1. Bitter gourd treated veeram peaks  were observed in the region between 3526.99 and 476.62cm-1 and a total of 13-peaks were obtained.  Milk treated veeram showed peaks in the region between 3851.10 and 470.39cm-1 and total of 16- peaks were obtained. This method indicated presence of large number of functional groups. Lemon juice treated veeram showed peaks in between 3839.33 and 471.99cm-1  total of 15-peaks were obtained. Tender coconut veeram peaks were observed in between 3877.84 and 477.33cm-1  and total of 15-peaks were obtained. From this data number of functional groups increased in purified samples which indicated that the toxic veeram is not only detoxified but also interacted with functional groups of purifying agents there by therapeutic potency is enhanced.

Development and characterization of novel castor oil-based polyurethane composites containing wood sawdust and rubber tire powder

2020 ◽  
pp. 096739112093966
Author(s):  
Rodrigo Konzen Seibel ◽  
André Zimmer ◽  
Rudinei Fiorio
Keyword(s):  
Castor Oil ◽  
Modulus Of Rupture ◽  
Flexural Properties ◽  
Thickness Swelling ◽  
Rubber Content ◽  
Wood Sawdust ◽  
Rubber Tire ◽  
Polyurethane Composites ◽  
Wood Content

New eco-friendly composites consisting of castor oil-based polyurethane (PU) resin, wood sawdust, and rubber tire powder were produced, and the morphological, physical, and flexural properties were investigated. The composites were composed of varying the concentration of the PU matrix (30, 40, and 50 m%) and the wood-to-rubber ratio of the disperse phase (100/0, 90/10, 80/20, 70/30, 60/40, and 50/50 m%/m% wood/rubber, respectively). The morphology of the composites was studied by optical microscopy and scanning electron microscopy, and the flexural properties, water absorption (WA), and thickness swelling (TS) were also investigated. The analysis of variance was used to study the effect of each factor (PU content and wood/rubber ratio) on the characteristics of the composites. PU/wood/rubber composites were successfully molded and their characteristics are promising for commercial use. According to the results, the composites presenting higher wood content (high wood/rubber ratio) showed higher modulus of rupture and modulus of elasticity values, although the addition and the increase of rubber content decreased these properties. Moreover, increasing PU or reducing the wood/rubber ratio significantly reduced the WA and TS, improving dimensional stability.

Soap Production Using Vacuum Reactive Distillation: Batch Model

2020 ◽  
Vol 13 ◽  
Author(s):  
Raghad Fareed Almilly ◽  
Maha Mohee Alwan ◽  
Wasan Omar Noori ◽  
Maha Hadi Alhassani
Keyword(s):  
Functional Groups ◽  
Conventional Method ◽  
Reaction Temperature ◽  
Reactive Distillation ◽  
Process Temperature ◽  
Ftir Analysis ◽  
Total Conversion ◽  
Commercial Soap ◽  
Naoh Solution ◽  
Soap Production

: This research studies the use of vacuum reactive distillation VRD technique for soap production. Olein and Palmitin in the ratio of 3 to 1 were mixed in a flask with NaOH solution in stoichiometric amount under different vacuum pressures from - 0.35 to - 0.5 bar. It was shown that total conversion could be reached by using the VRD technique. The soap produced by the VRD method was compared with the soap prepared by the reaction - only method which is known as the conventional method. The two kinds of soap were compared in these respects : the yield, the reaction temperature, the volume of the co-product liquid and its composition, FTIR analysis, the density, and the time of production. It was shown that the yield of soap using VRD was 2.45 times that produced by the reaction - only method. The process temperature was reduced 0.11 times. The volume of the co-product liquid was reduced 95.76% and it consisted of water only. The analyses of FTIR for the two kinds of soaps were compared with a commercial soap regarded as a standard and they showed identical functional groups. Very little difference in density was recorded. The time of production using VRD method was shorter than the conventional method giving another priority to the VRD method.

Ethanol and Distillate Blends: A Thermodynamic Approach to Miscibility Issues

2010 ◽  
Author(s):  
Jean-Noe¨l Jaubert ◽  
Romain Privat ◽  
Michel Molie`re
Keyword(s):  
Liquid Phase ◽  
Thermodynamic Properties ◽  
Functional Groups ◽  
Fossil Fuels ◽  
Chemical Properties ◽  
Physical Property ◽  
Diesel Oil ◽  
Group Contribution ◽  
Heat Of Mixing ◽  
The Stability

In the recent years, the quest for an ever wider cluster of sustainable primary energies has prompted an increasing number of attempts to combine the emission sobriety of bio fuels with the energy density advantage of fossil fuels. A number of compositions incorporating hydrocarbons, ethanol and in some cases limited amounts of water have been proposed, especially in the forms of micro emulsions, with a variable success. Indeed due to markedly different physical and chemical properties, ethanol and gasoil are able to blend and form homogeneous solutions only in limited proportion ranges. Indeed, such mixtures often give rise to liquid-liquid equilibrium. A key parameter is thus the Minimum Miscibility Temperature (MMT), i.e. the temperature above which ethanol and gasoil become completely miscible. In fact, commercial gasoils do not constitute a monolithic product but display in the contrary a large span of compositions that influence the stability of these blends. In this context, the LRGP laboratory (Laboratoire Re´actions et Ge´nie des Proce´de´s) has undertaken an investigation program intended to understand the factors underlying the stability of ethanol/gasoil blends. The approach is based on the calculation of the liquid-liquid phase diagrams formed by anhydrous ethanol and a mixture of various hydrocarbons representative of the diesel oil pool using the group contribution concept. Indeed, for correlating thermodynamic properties, it is often convenient to regard a molecule as an aggregate of functional groups; as a result, some thermodynamic properties (heat of mixing, activity coefficients) can be calculated by summing group contributions. In this study, the universal quasichemical functional group activity coefficient (UNIFAC) method has been employed as it appears to be particularly useful for making reasonable estimates for the studied non ideal mixtures for which data are sparse or totally absent. In any group-contribution method, the basic idea is that whereas there are thousands of chemical compounds of interest in chemical technology, the number of functional groups that constitute these compounds is much smaller. Therefore, if we assume that a physical property of a fluid is the sum of contributions made by the molecule’s functional groups, we obtain a possible technique for correlating the properties of a very large number of fluids in terms of a much smaller number of parameters that characterize the contributions of individual groups. This paper shows the large influence exerted by the paraffinic, aromatic and naphthenic character of the gasoil but also the sulfur content of the fossil fraction on the shape of the liquid-liquid phase diagram and on the value of the minimum miscibility temperature.

Quantification of SBS Content in SBS Polymer Modified Asphalt by FTIR

2011 ◽  
Vol 287-290 ◽  
pp. 953-960 ◽  
Author(s):  
Da Quan Sun ◽  
Li Wen Zhang ◽  
Xiao Ling Zhang
Keyword(s):  
Physical Property ◽  
Regression Coefficients ◽  
Polymer Content ◽  
Ftir Analysis ◽  
Linear Programming Method ◽  
Characteristic Peak ◽  
Modified Asphalt ◽  
Optimum Characteristic ◽  
Polymer Modified Asphalt ◽  
Relationship Of

The content SBS plays an important role on the performances of its modified asphalt. Traditional methods which were based on the differences of performances and molecular weight couldn’t quantify SBS content accurately. On the basis of FTIR analysis of SBS, the characteristic peak combination of modified asphalt that could be possibly used for quantitative analysis was summarized. According to theory of Lambert-Beer’s law, a relationship of absorbance ratio and content of mass was deduced. Considering the physical property of SBS polymer modified asphalt and coefficient of variation of specimens, the standard method to prepare SBS polymer modified asphalt for FTIR test was established. Then, regression coefficients were tested for significances combining with theoretical equation and linear programming method, the optimum characteristic peak ratio combination for quantification was designated. Finally, a reasonably accurate and precise method to quantify SBS content is achieved, and the author expected the research could provide the guidance for quantification of polymer content in polymer modified asphalt through this paper.

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