Monitoring of nylon 6,6/carbon fiber composites processing by X-ray diffraction and thermal analysis

2002 ◽  
Vol 86 (12) ◽  
pp. 3114-3119 ◽  
Author(s):  
Edson Cocchieri Botelho ◽  
Clara Leal Nogueira ◽  
Mirabel Cerqueira Rezende
Keyword(s):  
Thermal Analysis ◽  
Carbon Fiber ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nylon 6,6 ◽  
Composites Processing

Preparation of TiO2/CNT Composites and Effect of CNT's Structure on Morphology of Nano-TiO2

2013 ◽  
Vol 750-752 ◽  
pp. 259-264
Author(s):  
Feng Li ◽  
He Bian ◽  
Hui Zhang
Keyword(s):  
Heat Treatment ◽  
Carbon Fiber ◽  
Sol Gel ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Morphology ◽  
Morphology And Structure ◽  
Scanning Electron

Four kinds of TiO2/CNT (or carbon fiber) composites were successfully prepared by the sol-gel method using Ti(OBu)4 as precursor of TiO2, and untreated CNT, carboxylic CNT, hydroxylated CNT and carbon fiber were used as carriers, respectively. After heat treatment at 400 and 800°C, TiO2/CNT nanocomposites and purified TiO2 were obtained. Their structure and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results indicate that different carbon nanotubes and nanofiber have notable influences on the morphology and structure of TiO2 nanocrystals.

X-ray-cured carbon–fiber composites for vehicle use

2009 ◽  
Vol 78 (7-8) ◽  
pp. 531-534 ◽  
Author(s):  
Arnold Herer ◽  
Richard A. Galloway ◽  
Marshall R. Cleland ◽  
Anthony J. Berejka ◽  
Daniel Montoney ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
X Ray

X-Ray Curing of Carbon Fiber Composites for Structural Automotive Components

2017 ◽  
Author(s):  
Anthony Berejka ◽  
Dan Montoney ◽  
Dan Dispenza ◽  
Len Poveromo ◽  
Rick Galloway ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
X Ray ◽  
Automotive Components

scholarly journals Improved Performances of SiBCN Powders Modified Phenolic Resins-Carbon Fiber Composites

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 955
Author(s):  
Wenjie Yuan ◽  
Yang Wang ◽  
Zhenhua Luo ◽  
Fenghua Chen ◽  
Hao Li ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Photoelectron Spectroscopy ◽  
Phenolic Resin ◽  
Pyrolysis Product ◽  
Ablation Rate ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Phenolic Resins ◽  
X Ray ◽  
Ablation Resistance

The effect of SiBCN powder on properties of phenolic resins and composites was analyzed. Compared with phenolic resins, the thermal stability of SiBCN powder modified phenolic resins (the SiBCN phenolic resins) by characterization of thermogravimetric analysis (TGA) improved clearly. It was found by X-ray photoelectron spectroscopy (XPS) that reactions between SiBCN powder and the pyrolysis product of phenolic resins were the main factor of the increased residual weight. TGA and static ablation of a muffle furnace were used to illustrate the roles of SiBCN powder on increasing oxidation resistance of SiBCN powder-modified phenolic resin–carbon fiber composites (SiBCN–phenolic/C composites), and the oxidative product was analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). For SiBCN–phenolic/C composites, the occurrence of oxidation reaction and the formation of protective crust contributed to improving oxidative resistance. The result of the oxygen-acetylene test showed that the linear ablation rate (LAR) and mass ablation rate (MAR) of phenolic resin–carbon fiber composites reduced from 0.052 ± 0.005 mm/s to 0.038 ± 0.004 mm/s and from 0.050 ± 0.004 g/s to 0.043 ± 0.001 g/s by introducing SiBCN powder, respectively. The mechanism of ablation resistance after the introduction of SiBCN powder was investigated. The high melt-viscosity of SiBCN powder caused SiBCN powder to remain on the surface of composites and protect the internal resins and carbon fibers. The oxidation of SiBCN powder and volatilization of oxide can consume energy and oxygen, thus the ablation resistance of SiBCN–Ph composite was improved.

PENINGKATAN LAJU DISOLUSI ACYCLOVIR DENGAN METODE SISTEM DISPERSI PADAT MENGGUNAKAN POLOXAMER 188

2016 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Budi Setiawan ◽  
Erizal Zaini ◽  
Salman Umar
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Differential Thermal Analysis ◽  
Fourier Transform Infrared ◽  
X Ray Diffraction ◽  
Poloxamer 188 ◽  
X Ray ◽  
Scanning Electron

Sebuah penelitian tentang sistem dispersi padat dari asiklovir dengan poloxamer 188 telah dilakukan formulasi dengan pencampuran secara fisika dengan rasio 1 : 1, 1 : 3, 1 : 5 dan dispersi padat 1 : 1, 1 : 3, 1 : 5 dan penggilingan 1:1 sebagai pembanding. Dispersi padat dibuat menggunakan metode pencairan (fusi), yang digabung dengan poloxamer 188 pada hotplate kemudian asiklovir dimasukkan ke dalam hasil poloxamer 188 lalu di kocok hingga membentuk masa homogen. Semua formula yang terbentuk termasuk asiklovir poloxamer 188 murni dianalisis karakterisasinya dengan Differential Thermal Analysis (DTA), X-ray Diffraction, Scanning Electron Microscopy (SEM), dan Fourier Transform Infrared (FTIR), kemudian pengambilan dilakukan  (penentuan kadar) mengunakan spektrofotometer UV pada panjang gelombang 257,08 nm dan uji laju disolusi dengan aquadest bebas CO2 menggunakan metode dayung. Hasil pengambilan  (penentuan kadar) menunjukkan bahwa semua formula memenuhi persyaratan farmakope Amerika edisi 30 dan farmakope Indonesia edisi 4 yaitu 95-110%. Sedangkan hasil uji laju disolusi untuk campuran fisik 1: 1, dan dispersi padat 1: 1, dan penggilingan 1: 1 menunjukkan peningkatan yang nyata dibandingkan asiklovir murni. Hal ini juga dapat dilihat dari hasil perhitungan statistik  menggunakan analisis varian satu arah  SPSS 17.

Sign in / Sign up

Export Citation Format

Share Document