scholarly journals PEMBUATAN POLIURETAN ELASTOMER RAMAH LINGKUNGAN BERAZASKAN JATROPHA OIL

2021 ◽  
Vol 19 (01) ◽  
Author(s):  
Vera Ilhani
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Jatropha Oil ◽  
Nano Tio2 ◽  
Thermo Gravimetric ◽  
Thermo Gravimetric Analyzer ◽  
Ft Ir ◽  
Scanning Electron

Pada penelitian ini dilakukan tentang pembuatan poliuretan berbasis Metilen difenil diisosianat (MDI) dan minyak jarak pagar  dengan menggunakan etil asetat, dibutiltin dilaurat, metal laurat, nano tio2 , pentaeritritol, dan aquades sebagai pengisi tambahan yang bertujuan untuk meningkatkan sifat mekanik poliuretan. Tujuan penelitian ini adalah untuk menentukan pengaruh massa MDI dan minyak jarak pada pembuatan poliuretan dengan memvarisikan bahan utamanya. Karakteristik analisa stabilitas termal menggunakan alat TGA (Thermo Gravimetric Analyzer) menunjukkan keandalan termal yang sangat baik memiliki stabilitas termal, kapasitas penyimpanan panas laten yang tinggi, dan stabilitas siklus termal yang unggul dengan ketahanan termal hingga 403.65C°C. Pada analisa gugus fungsi menggunakan FT-IR spektroskopis gugus N-H pada daerah separan 132.24 cm-1,  pada daerah serapan 3620.39 cm-1 merupakan gugus O-H dan daerah serapan 1541.12 cm-1  merupakan gugus C=C (MDI). Sedangkan analisa struktur morfologi menggunakan alat SEM (Scanning Electron Microscope) pada sampel PU sampel A memiliki permukaan halus dan menandakan partikel padat sebagai penstabil yang baik (emulsi pickering) dibangdingkan dengan sampel B yang menunjukkan beberapa bentuk agregat yang menggumpal dan berpori-pori besar, serta permukaan yang lebih halus.Kata kunci : Poliuratan, MDI, Minyak Jarak, PCM

PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽  
2013 ◽  
Vol 28 (1) ◽  
Author(s):  
Maya Komalasari ◽  
Bambang Sunendar
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sol Gel ◽  
Crosslinking Agent ◽  
X Ray Diffraction ◽  
Nano Tio2 ◽  
X Ray ◽  
Infra Red ◽  
Scanning Electron

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan  dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1,  yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.

Hyper-Dispersant Modifier Prepared and Applied in Polyethylene Composites

2013 ◽  
Vol 750-752 ◽  
pp. 2026-2030
Author(s):  
Shao Hui Wang
Keyword(s):  
Infrared Spectroscopy ◽  
Electron Microscope ◽  
Impact Strength ◽  
Scanning Electron Microscope ◽  
Surface Analysis ◽  
Butyl Acrylate ◽  
Ft Ir ◽  
Anchoring Group ◽  
The Impact ◽  
Scanning Electron

A new hyper-dispersant with Silicon radicals as anchoring group and poly (butyl acrylate) as solvatable chain was synthesized and its effect on the properties of PE/Talc composites was investigated in this paper. Fourier transmission infrared spectroscopy (FT-IR) results show that the modifier react on the Talc powders surface and the modified Talc powders particles. The impact strength of PE/Talc composites increased about 32.5% compared with that of PE/Talc (filled with same non-modified fraction) respectively. Based on surface analysis by scanning electron microscope (SEM), the Talc powders particles buried well in PE matrix when Talc powders was coated with the new modifier.

Preparation and Properties of Composite Photocatalyst of Needle ZnO Nanorod Grafted in the Pores of Expanded Graphite

2011 ◽  
Vol 204-210 ◽  
pp. 273-277
Author(s):  
Song Jian Zhao ◽  
En Qiang Wang ◽  
Min Cong Zhu ◽  
Li Na Ding ◽  
Ying Chen Zhang ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Fourier Transformation ◽  
Chemical Structure ◽  
Expanded Graphite ◽  
Zno Nanorod ◽  
Composite Photocatalyst ◽  
Hydrolysis Method ◽  
Ft Ir ◽  
Scanning Electron

A composite photocatalyst of needle ZnO nanorod grafted in the pores of expanded graphite (EG) was prepared by a process of hydrolysis method directly, in which the expanded graphite was prepared by microwave irradiation. Scanning electron microscope (SEM) and Fourier transformation infrared spectroscope (FT-IR) were used to characterize the structure and the chemical structure of the photocatalyst. The results indicate that expanded graphite had a unique net-like pores structure and ZnO Nanorod was loaded on EG to form EG/ZnO composite photocatalyst.

Preparation and Characterization of Gelatin/CMC Microcapsule by Complex Coacervation

2012 ◽  
Vol 550-553 ◽  
pp. 1005-1009 ◽  
Author(s):  
Yan Gao ◽  
Ding Xie ◽  
Dan Ni Han ◽  
Jian Xun Ouyan ◽  
Yong Le Liu
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Orthogonal Design ◽  
Wall Material ◽  
Process Conditions ◽  
Complex Coacervation ◽  
Single Factor ◽  
Ft Ir ◽  
Scanning Electron

Capsaicin microencapsules were prepared by complex coacervation with gelatin and carboxymethyl cellulose (CMC). The process conditions were optimized by Orthogonal design on the base of single factor test. As wall material concentration (WMC), gelatin/CMC rate(GCR), core/wall rate(CWR) and pH, are 1%, 9:1, 1:1 and 4.5-4.6 respectively, the encapsulation yield is 92.53% and efficiency is 91.23%. The analysis of capsaicin microcapsule showed that water content is 3.12％ and the repose angle is 43.8°. The microcapsule particle and microstructure were valued by scanning electron microscope (SEM). FT-IR spectrum proved that the coacervate is formed successfully.

Manufacturing Techniques and Property Evaluations of PVA/Gelatin Electrospinning Nanofiber Membranes

2015 ◽  
Vol 749 ◽  
pp. 178-181
Author(s):  
Jia Horng Lin ◽  
Chih Kuang Chen ◽  
Chien Lin Huang ◽  
Ssu Chieh Huang ◽  
Ching Wen Lou
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Polyvinyl Alcohol ◽  
Fiber Formation ◽  
Test Results ◽  
Ft Ir ◽  
Nanofiber Membranes ◽  
Manufacturing Techniques ◽  
Scanning Electron

This study combines polyvinyl alcohol (PVA) and gelatin with various ratios and administers different voltages to make PVA/gelatin electrospinning nanofiber membranes. The PVA/gelatin mixtures are measured for their viscosity and conductivity, followed by being electrospun into nanofiber membranes. The scanning electron microscope and an FT-IR are used to evaluate the membranes. The test results show that the nanofiber membranes have a complete fiber formation with the voltage being 20 kV and the PVA/gelatin ratio being 8/2. In addition, an increase in the viscosity of the PVA/gelatin mixture leads to the formation of beads.

PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽  
2013 ◽  
Vol 28 (1) ◽  
Author(s):  
Maya Komalasari ◽  
Bambang Sunendar
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sol Gel ◽  
Crosslinking Agent ◽  
X Ray Diffraction ◽  
Nano Tio2 ◽  
X Ray ◽  
Infra Red ◽  
Scanning Electron

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan  dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1,  yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.

An Electrospinning Approach to Polyaniline Nanofibers by Template

2007 ◽  
Vol 121-123 ◽  
pp. 579-582 ◽  
Author(s):  
Hui Min Huang ◽  
Z.Y. Li ◽  
C. Wang
Keyword(s):  
Heat Treatment ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ir Spectra ◽  
Energy Dispersive ◽  
Composite Fibers ◽  
X Ray ◽  
Polyaniline Nanofibers ◽  
Ft Ir ◽  
Scanning Electron

Polyaniline doped with camphorsulfonic acid (PANI.HCSA) nanofibers have been successfully prepared using “nanofibers template” via electrospinning. The PVA nanofibers were used as a template to get the PANI/PVA composite fibers. After removing the template by heat treatment, the PANI fibers were obtained. Scanning electron microscope (SEM) with the Energy Dispersive X-Ray Spectrometer software (EDX) and FT-IR spectra were used to characterize the composite fibers and the PANI.HCSA nanofibers. The average diameters of the composite fibers obtained and PANI fibers were 920 nm and 530 nm, respectively.

scholarly journals Synthesis, Tribological Properties and Mechanism of Nickel Nanoparticles as Additives in Lithium Grease

2021 ◽  
Author(s):  
Hong Zhang ◽  
wenjing hu ◽  
Jiusheng Li ◽  
sheng Han
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Tribological Properties ◽  
Nickel Nanoparticles ◽  
Gravimetric Analysis ◽  
Lithium Grease ◽  
X Ray ◽  
Ft Ir ◽  
Nano Additives ◽  
Scanning Electron

Abstract The advanced nano-additives can effectively improve the tribological properties of grease, which can greatly reduce friction consumption. Therefore, we prepared nickel nanoparticles by direct reduction method using Ni(HCOO)2 • 2H2O as the basic raw material. The morphology and structure of the nanoparticles were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), FT-IR spectrometer (FT-IR) and thermal gravimetric analysis (TGA). In order to investigate the lubrication performance of nickel nanoparticles in lithium grease, friction experiments were carried out on four-ball friction tester and TE77 ball-on-plate reciprocating model. Then, the worn surfaces were analyzed by scanning electron microscope and white light interferometry. Meanwhile, the element composition and valence state on friction surfaces were detected by energy dispersive spectrometer and X-ray photoelectron spectroscopy. Based on the experimental results, it was concluded that the nickel nanoparticles can effective improved the tribological properties by interlayer sliding. Moreover, the nickel nanoparticles could promote the formation of friction film on boundary lubrication surface and chemical reaction film between friction pairs. This study could provide a new direction for metal nano-additives to improve the tribological properties of grease.

scholarly journals CHARACTERIZATION AND HYPOGLYCEMIC STUDY OF ISOLATED NATURAL POLYMER FROM THE STEM OF MANILKARA HEXANDRA (ROXB.) DUBARD

2019 ◽  
pp. 206-213
Author(s):  
IRUDAYA MONISHA S. ◽  
ROSALINE VIMALA J.
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Moisture Content ◽  
Natural Polymer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Scanning Electron

Objective: In the present study, the isolated natural polymer from the stem of Manilkara hexandra and their physiochemical parameters were investigated. It is further involved in hypoglycemic studies. Methods: The gum exudates were screened for phytochemicals, physicochemically analyzed for solubility, pH, total ash, moisture content, acid insoluble ash, water soluble ash, sulfated ash, flow property, and it is characterized by Fourier Transform Infrared analysis (FT-IR), Scanning Electron Microscope (SEM), X-ray diffraction analysis (XRD), Nuclear Magnetic Resonance (NMR) studies (13Carbon and 1Proton) and it was examined in vitro studies by hypoglycaemic activity. Results: The isolated gum extracted from the stem of Manilkara hexandra (Roxb.) Dubard ash values were found to be low. The gum is found to be hygroscopic in nature due to its high moisture content (0.9131±0.03). Fourier Transform Infrared (FT-IR) spectra show relevant functional groups for gum, which is further confirmed by resonance spectral studies. The X-ray diffraction (XRD) pattern shows that the gum is amorphous as well as crystalline in nature. Scanning Electron Microscope (SEM) image confirms that the gum particles have irregular size and shape. Sugar composition analysis by Thin Layer Chromatography indicated the presence of rhamnose, arabinose. The in vitro study of hypoglycemic activity shows the best report compared with the standard. The experimental evidence offers scope to use this natural polymer in the food and pharmaceutical industry. Conclusion: The isolated natural polymer shows good result in hypoglycemic studies compared with standard.

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