Abrasion studies of nylon 6/montmorillonite nanocomposites using scanning electron microscopy, fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy

2009 ◽  
Vol 113 (5) ◽  
pp. 3286-3293 ◽  
Author(s):  
Qi Zhou ◽  
Kean Wang ◽  
Leslie S. Loo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Fourier Transform Infrared ◽  
Nylon 6 ◽  
X Ray ◽  
Scanning Electron

scholarly journals The Characteristics of Padamarang Magnesite under Calcination and Hydrothermal Treatment

2019 ◽  
Vol 29 (2) ◽  
Author(s):  
Mutia Dewi Yuniati ◽  
Feronika Cinthya Mawarni Putri Wawuru ◽  
Anggoro Tri Mursito ◽  
Iwan Setiawan ◽  
Lediyantje Lintjewas
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Hydrothermal Treatment ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Magnesite (MgCO3) is the main source for production of magnesium and its compound. In Indonesia, magnesite is quite rare and can be only found in limited amount in Padamarang Island, Southeast Sulawesi Provence. Thus the properties of magnesite and the reactivity degree of the obtained product are of technological importance. The aim of this work was to analyze the characteristics of Padamarang magnesite under calcination and hydrothermal treatment processes. The processes were carried out at various temperatures with range of 150-900°C for 30 minutes. The solids were characterized with respect to their chemical and physical properties by using scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). SEM image indicates that magnesite was formed from thin and flat hexagon sheets. The FTIR and XRD analysis disclose that MgO formed at temperature above 300°C, where as the magnesite sample also lost its mass around 50%. These results demonstrate that Padamarang magnesite decomposes to magnesium oxide and carbon dioxide at high temperature.Magnesit (MgCO3) merupakan sumber utama untuk produksi magnesium dan senyawa-senyawanya. Di Indonesia, magnesit cukup jarang dan hanya dapat ditemukan dalam jumlah yang terbatas di Pulau Padamarang, Propinsi Sulawesi Tenggara. Oleh karena itu sifat magnesit dan derajat reaktivitas dari produk-produk magnesit penting untuk diketahui. Penelitian ini bertujuan untuk menganalisis karakteristik magnesit Padamarang dengan perlakuan kalsinasi dan hidrothermal.  Proses dilakukan pada temperatur yang bervariasi dari 150-900°C selama 30 menit. Sifat kimia dan fisika dari magnesit dikarakterisasi dengan menggunakan scanning electron microscopy dengan energy-dispersive X-ray spectroscopy (SEM-EDX), Fourier-transform infrared spectroscopy (FTIR), dan X-ray diffraction (XRD). Gambar dari analisis SEM menunjukkan bahwa magnesit terbentuk dari lembaran-lembaran heksagonal yang tipis dan datar. Hasil analisis dengan FTIR dan XRD menunjukkan bahwa MgO terbentuk pada temperatur diatas 300°C, dimana sampel magnesit juga kehilangan massanya sekitar 50% pada suhu tersebut. Hal ini menunjukkan bahwa Magnesit Padamarang terdekomposisi menjadi magnesium oksida dan karbon dioksida pada temperatur tinggi.

scholarly journals Fabrication and Physico-Chemical Properties of Antifungal Samarium Doped Hydroxyapatite Thin Films

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1466
Author(s):  
Carmen Steluta Ciobanu ◽  
Daniela Predoi ◽  
Patrick Chapon ◽  
Mihai Valentin Predoi ◽  
Simona Liliana Iconaru
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Chemical Properties ◽  
Fourier Transform Infrared ◽  
Orthopedic Implants ◽  
Scanning Electron

Samarium doped hydroxyapatite (Ca10−xSmx(PO4)6(OH)2, xSm = 0.5, 50SmHAp) is a very promising candidate to be used for different coatings in various dental and orthopedic implants. We report, for the first time, the obtaining of 50SmHAp thin films by a cost-effective method, namely spin coating. Thin films of 50SmHAp on silicon substrate have been analyzed by various techniques such as Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), Metallographic microscopy and Glow Discharge Optical Emission Spectroscopy (GDOES). The stability of 50SmHAp suspension was evaluated by ultrasound measurements. Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were also used to evaluate the 50SmHAp suspension. The antifungal activity of 50SmHAp suspension and coatings was assessed using Candida albicans ATCC 10231 fungal strain (C. albicans). The results of the antifungal assays depicted that both 50SmHAp suspensions and coatings were effective in inhibiting the development of C. albicans fungal cells, thus making them ideal candidates for the development of novel antifungal agents. The obtained results give new perspective for possible applications of 50SmHAp thin films in various medical applications due to their antifungal properties.

scholarly journals Penyerapan Zat Warna Basic Red 18 dan Direct Black 38 dengan Menggunakan Sabut Pinang sebagai Adsorben

2019 ◽  
Vol 14 (1) ◽  
pp. 72-80 ◽  
Author(s):  
Muhammad - Muhammad ◽  
Azhari - Muhammad Syam ◽  
Ishak - Ibrahim ◽  
Nurfarida - Nurfarida ◽  
Darmadi - Darmadi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Ft Ir ◽  
Scanning Electron

 AbstrakAdsorpsi zat warna basic red 18 dan direct black 38 dengan adsorben dari serat pinang telah diteliti. Morfologi dan gugus fungsi permukaan serat pinang dianalisa dengan Fourier transform infrared spectroscopy (FT-IR) dan scanning electron microscopy (SEM). Penelitian ini fokus pada mekanisme adsorpsi dan pengaruh dosis adsorben. Koefisien korelasi (R2) dianalisis dengan menggunakan regresi linier. Mekanisme adsorpsi dilakukan dengan menggunakan dua model isoterm, yaitu isoterm Langmuir dan Freundlich. Hasil kajian menunjukkan bahwa model Freundlich adalah yang paling sesuai diaplikasikan untuk adsorpsi zat warna basic red 18 dan direct black 38. Karena model Freundlich mampu menginterpretasikan proses adsorpsi zat warna basic red 18 dan direct black 38 dengan baik, maka sistem adsorpsi yang digunakan dalam penelitian ini adalah heterogen. Kapasitas adsorpsi untuk basic red 18 pada berbagai berat adsorben (seperti: 1, 2, dan 3 g) menggunakan model Freundlich adalah 0,234 L/g; 0,101 L/g dan 0,093 L/g.  Sementara kapasitas untuk direct black 38 adalah 0,360 L/g; 0,374 L/g dan 0,141 L/g.  

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