Improvements of the Tensile Strength of Phenolic Resin Adhesive by Surface-Modified Nanocrystalline Cellulose

2014 ◽  
Vol 1073-1076 ◽  
pp. 43-46
Author(s):  
Hao Zhang ◽  
Xiao Chun Li ◽  
Ming Zhu ◽  
Liang Hong ◽  
Gao Li Chu
Keyword(s):  
Tensile Strength ◽  
Fourier Transform ◽  
Phenolic Resin ◽  
Fourier Transform Infrared ◽  
Nanocrystalline Cellulose ◽  
National Standard ◽  
Resin Adhesive ◽  
Wetting Property ◽  
Ft Ir ◽  
Surface Modified

In this study, the tensile strength of phenolic resin adhesive was reinforced by the use of surface-modified nanocrystalline cellulose (NCC). The original NCC was modified by 3-methacryloxy-propyltrimethoxysilane (MPS) to improve the wetting property with the phenolic resin adhesive. The phenolic resin adhesive with surface-modified NCC was analyzed by Fourier transform infrared (FT-IR). Tensile strength of the modified phenolic resin adhesive was tested according to Chinese National Standard GB/T 2567-2008. The results showed that the wetting property between NCC modified by MPS and phenolic resin adhesive was increased by 21.7% and the tensile strength of phenolic resin adhesive with modified NCC was enhanced from 6.25 MPa to 15.97 MPa.

Influence of Dispersant on the Dispersion Stability of Nano-CoFe2O4 Refrigeration Oil

2011 ◽  
Vol 399-401 ◽  
pp. 430-438
Author(s):  
Guan Nan Li ◽  
Mei Bo Xing ◽  
Rui Xiang Wang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectrum ◽  
High Stability ◽  
Fourier Transform Infrared ◽  
Dispersion Stability ◽  
Mass Ratio ◽  
Ft Ir ◽  
Mineral Lubricant ◽  
Observation Method ◽  
Surface Modified

Abstract. Adding dispersants like surfactants and polymers to modify nanoparticles surface is an effective way to enhance the dispersion stability of nanoparticles in refrigeration oil. In this paper, many groups of nano-CoFe2O4refrigeration oil were prepared. In order to obtain the most effective kind of dispersant and the optimum additive amount, sedimentation observation method was employed for evaluation of the dispersion stability of CoFe2O4nanoparticles in 3GS mineral lubricant. The spectral behavior of the surface modified nano-CoFe2O4was studied by Fourier transform infrared (FT-IR) spectrometer. It was revealed that the optimized mass ratio between nano-CoFe2O4and dispersant ratio is 2 to 5; a relatively appropriate dispersant for nano-CoFe2O4would be Tween40, Tween60, Span80, Span80; Tween60 was the best. It was also illustrated in the infrared spectrum that nano-CoFe2O4particles surface modified by Tween60 was connected by organic groups in Tween60. Thus, the particles changed from hydrophilic to lipophilic and performed good dispersity and high stability when dispersed in mineral refrigeration oil.

scholarly journals Penghambatan Interaksi Eutektik Akibat Energi Kompresi dengan Penambahan Pati Jagung

2018 ◽  
Vol 5 (1) ◽  
pp. 17
Author(s):  
Dwi Setyawan ◽  
Noorma Rosita ◽  
Diajeng Putri Paramita ◽  
Dicky Pratama
Keyword(s):  
Thermal Analysis ◽  
Tensile Strength ◽  
Fourier Transform ◽  
Differential Thermal Analysis ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Fourier Transform Infrared ◽  
Ft Ir ◽  
Scanning Electron

Penelitian ini dilakukan untuk mengetahui penghambatan interaksi eutektik yang terjadi pada pengempaan campuran biner ibuprofen-asam stearat dengan penambahan pati jagung. Pati jagung ditambahkan ke dalam campuran biner ibuprofen-asam stearat 40:60 (% b/b) dengan komposisi 10, 20, dan 30% (b/b) kemudian dikempa. Karakterisasi fisik tablet kempa dilakukan menggunakan analisis kekuatan mekanik, differential thermal analysis (DTA), difraksi sinar-X serbuk (DSXS), spektroskopi fourier transform infrared (FT-IR), dan scanning electron microscope (SEM). Uji kekuatan mekanik menunjukkan penambahan pati jagung 10 dan 20% menyebabkan penurunan nilai tensile strength dibandingkan campuran biner. Penambahan 20% pati jagung menyebabkan pergeseran puncak ke sudut 2Ɵ lebih besar disertai dengan penurunan intensitas difraksi sinar-X. Analisis termal tablet kempa campuran biner-pati jagung 20% menunjukkan peningkatan titik lebur eutektik dan spektra FT-IR yang dihasilkan tidak berbeda dibandingkan dengan tablet kempa campuran biner. Mikrofoto SEM menunjukkan penambahan pati jagung 20% dapat mencegah terjadinya sintering pada tablet kempa ibuprofen-asam stearat. Hasil karakterisasi fisik mengindikasikan bahwa pati jagung dapat meredam pembentukan eutektik akibat energi kompresi antara ibuprofen-asam stearat pada komposisi 20% (b/b)

FR-IR Molecular Microanalysis System

1990 ◽  
Vol 48 (2) ◽  
pp. 270-271
Author(s):  
John A. Reffner ◽  
William T. Wihlborg
Keyword(s):  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Integrated System ◽  
Morphological Examination ◽  
Fully Integrated ◽  
Ir Microscopy ◽  
Normal Functions ◽  
Infrared Microspectroscopy ◽  
Infrared Spectral ◽  
Ft Ir

The IRμs™ is the first fully integrated system for Fourier transform infrared (FT-IR) microscopy. FT-IR microscopy combines light microscopy for morphological examination with infrared spectroscopy for chemical identification of microscopic samples or domains. Because the IRμs system is a new tool for molecular microanalysis, its optical, mechanical and system design are described to illustrate the state of development of molecular microanalysis. Applications of infrared microspectroscopy are reviewed by Messerschmidt and Harthcock.Infrared spectral analysis of microscopic samples is not a new idea, it dates back to 1949, with the first commercial instrument being offered by Perkin-Elmer Co. Inc. in 1953. These early efforts showed promise but failed the test of practically. It was not until the advances in computer science were applied did infrared microspectroscopy emerge as a useful technique. Microscopes designed as accessories for Fourier transform infrared spectrometers have been commercially available since 1983. These accessory microscopes provide the best means for analytical spectroscopists to analyze microscopic samples, while not interfering with the FT-IR spectrometer’s normal functions.

On-Chip Micro–Electro–Mechanical System Fourier Transform Infrared (MEMS FT-IR) Spectrometer-Based Gas Sensing

2016 ◽  
Vol 70 (5) ◽  
pp. 897-904 ◽  
Author(s):  
Mazen Erfan ◽  
Yasser M Sabry ◽  
Mohammad Sakr ◽  
Bassem Mortada ◽  
Mostafa Medhat ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Mechanical System ◽  
Gas Sensing ◽  
Fourier Transform Infrared ◽  
Micro Electro Mechanical System ◽  
Ft Ir ◽  
On Chip

Tetrachlorodibenzo-p-Dioxin Isomer Differentiation by Capillary Gas Chromatography Fourier Transform-Infrared Spectroscopy

1987 ◽  
Vol 41 (5) ◽  
pp. 809-820 ◽  
Author(s):  
James Grainger ◽  
Leslie T. Gelbaum
Keyword(s):  
Gas Chromatography ◽  
Fourier Transform ◽  
Vapor Phase ◽  
Valence Bond ◽  
Fourier Transform Infrared ◽  
Molecular Geometry ◽  
Ether Linkage ◽  
Relative Electron ◽  
Ft Ir ◽  
Infrared Frequencies

Reference infrared vapor-phase spectra of the 22 tetrachlorodibenzo-dioxin (TCDD) isomers were recorded at low microgram concentrations. These reference spectra of synthetic mixture components separated chromatographically or by spectral subtraction exhibit distinct infrared spectra for each isomer. The infrared frequencies are delineated in correlation tables and are interpreted in terms of substitution patterns which determine the strength of the ether linkage. Absorbance values in the 1330–1280 cm−1 (C-O-C asymmetric stretch) region correlate with specific substitution patterns and molecular geometry. Relative electron-withdrawing capacities for chlorinated aromatic rings in TCDD isomers were estimated on the basis of relative capacities determined for model compounds. Qualitative correlations were established between electron-withdrawing capacities and the effects of resonance and field interactions on the ether linkage absorption frequencies of individual TCDD isomers. Gas chromatography Fourier transform infrared (GC/FT-IR) isomer assignments are generally consistent with those obtained by proton Fourier transform nuclear magnetic resonance (1H FT/NMR) and flame ionization gas chromatography (GC/FID). A chromatographically independent method of assigning TCDD isomer structures on the basis of ether linkage asymmetric stretching frequencies was established by utilization of valence-bond approximations. GC/FT-IR assignments for several TCDD isomers differ from isomer assignments in previously published results. A user-generated, vapor-phase reference library, containing individual TCDD spectra and spectra of isomer pairs that are incompletely resolved on chromatographic columns, correctly identified each isomer in variety of mixtures by means of a software algorithm.

Depth Profile Study of Large-Sized Coal Samples by Fourier Transform Infrared Photoacoustic Spectroscopy

1986 ◽  
Vol 40 (2) ◽  
pp. 214-217 ◽  
Author(s):  
Tiziana Zerlia
Keyword(s):  
Fourier Transform ◽  
Depth Profile ◽  
Photoacoustic Spectroscopy ◽  
Modulation Frequency ◽  
Fourier Transform Infrared ◽  
Qualitative Description ◽  
Difference Spectra ◽  
Compositional Depth Profile ◽  
Ft Ir ◽  
Infrared Photoacoustic Spectroscopy

A multidisciplinary approach is demonstrated to elucidate coal weathering at a molecular level. Fourier Transform Infrared Photoacoustic Spectroscopy (FT-IR/PAS) provides a technique for a compositional depth profile of coal by simply varying the modulation frequency (mirror velocity) of the light impinging upon the solid surface. In order that the potential of this technique in this field could be evaluated, large-sized coal samples were examined. The PA difference spectra obtained from the spectra taken at different modulation frequencies (i.e., different depths), on a sample aged in air, demonstrate the appearance of negative features in the CH infrared absorption which are indicative of a coal alteration. Therefore, different coal layers can be distinguished by FT-IR/PAS. The application of the same technique to the study of a coal sample heated in air at 200°C allows the detection of different oxidation mechanisms operating inside and outside the coal. Although quantitative results are difficult to obtain, the technique can be successfully proposed for a qualitative description of coal weathering.

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