scholarly journals Application of Fluorescent Label in Polymer Nanofibers

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Lucie Zarybnicka ◽  
Radka Bacovska ◽  
Zuzana Nadvornikova ◽  
Numan Almonasy ◽  
Tomas Syrovy
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Fluorescent Probe ◽  
Solid Phase ◽  
Polyamide 6 ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Fluorescent Label ◽  
Microscope Images ◽  
Scanning Electron

The electrospinning of fluorescent probe polyamide 6 doped by 7H-benzimidazo[2,1-a]benzo[de]isoquinolin-7-on is presented as a model processing photoluminescent nanofibers. The presence of the fluorescent probe in the fiber layers was confirmed by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR); the surface nanofiber structure was described by high-resolution fluorescence microscope and scanning electron microscope images. The prepared nanofibers with the fluorescent label were further characterized by fluorescence spectroscopy, both in the solid phase and in the solution.

Effect of polyamide 6 on the mechanical behavior of thermoplastic polyurethanes/polyamide 6 blends

2021 ◽  
pp. 095440542110406
Author(s):  
Nga Thi-Hong Pham
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Mechanical Behavior ◽  
Thermoplastic Polyurethane ◽  
Polyamide 6 ◽  
Thermoplastic Polyurethanes ◽  
Microscope Images ◽  
Scanning Electron

Ductility and tensile strength are among the basic mechanical properties of polymers. Generally, it is difficult to enhance the ductility without significantly reducing the tensile strength. In this study, thermoplastic polyurethane (TPU) is mixed with 0%, 2.5%, 5%, 7.5%, 10%, and 12.5% polyamide 6 (PA6). The results show that the sample containing 100% TPU has the largest elongation of 690.5%. When PA6 is added, the elongation decreases gradually to 635.0%, 623.1%, 529.5%, 476.0%, 391.3%, and 242.8%, corresponding to 2.5%, 5%, 7.5%, 10%, 12.5%, and 100% PA6, respectively. The tensile strengths are 36.7, 33.8, 29.4, 26.5, 23.1, and 24.9 MPa, corresponding to 0%, 2.5%, 5%, 7.5%, 10%, and 12.5% PA6 samples, respectively. The tensile strength decreases gradually when the PA6 content is increased. Notably, the tensile strength of the 12.5% PA6 sample increases compared to the 10% PA6 sample. In addition, the hardness of the TPU/PA blend increases slightly as the PA6 ratio is increased. Finally, scanning electron microscope images demonstrate that PA6 particles act as particles dispersed or dissolved in TPU/PA blends.

Automatic Focusing and Astigmatism Correction Method based on Fourier Transform of Scanning Electron Microscope Images

1999 ◽  
Vol 38 (Part 1, No. 2A) ◽  
pp. 957-960 ◽  
Author(s):  
Munehiro Ogasawara ◽  
Yuji Fukudome ◽  
Kiyoshi Hattori ◽  
Shuichi Tamamushi ◽  
Soshi Koikari ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Correction Method ◽  
Astigmatism Correction ◽  
Microscope Images ◽  
Automatic Focusing ◽  
Scanning Electron

scholarly journals Synthesis and Characteristics Of ( PAV-PAVC-Ti ) Nanocomposites

2020 ◽  
pp. 21-26
Author(s):  
Waleed Khalid ◽  
Maha Khalid Alshmmari ◽  
Maryam Adnan Al-Ethary
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Optical Microscope ◽  
Casting Method ◽  
Sem Images ◽  
Microscope Images ◽  
Grain Distribution ◽  
Titanium Nanoparticles ◽  
The Fourier Transform ◽  
Scanning Electron

 In this study, (PVA-PVAC-Ti) nanocomposites have been prepared by using the 'casting method' with different weight percentages of titanium nanoparticles. The (PVA-PVAC-Ti) nanocomposites have been diagnosed by different routes such as the 'Fourier Transform Infrared Spectroscopy (FTIR)', 'scanning electron microscope (SEM)' images, and optical microscope images. The experimental results (FTIR) showed increasing the value of the absorbance of the (PVA-PVAC-Ti) nanocomposites with an increase in the proportion of titanium nanoparticles. All peak characteristics remain the same and the most bond in the same wavenumber. The morphology of the (PVA-PVAC-Ti) nanocomposites films has been studied using (SEM) technique, which showed grain distribution at surface morphology and grain aggregates with increasing of titanium nanoparticles. Photos optical microscope shows the distribution of titanium nanoparticles atoms for all nanocomposite's films, it also shows a continuous network of ions inside the polymers in a ratio (16 wt.%) of (Ti.  nanoparticles).

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.

scholarly journals Distinguishing active from quiescent disease in ANCA-associated vasculitis using attenuated total reflection Fourier-transform infrared spectroscopy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Adam D. Morris ◽  
Camilo L. M. Morais ◽  
Kássio M. G. Lima ◽  
Daniel L. D. Freitas ◽  
Mark E. Brady ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Unmet Need ◽  
Fourier Transform Infrared ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Remission Induction ◽  
Disease Remission ◽  
Anca Associated Vasculitis ◽  
Active Disease ◽  
Quiescent Disease

AbstractThe current lack of a reliable biomarker of disease activity in anti-neutrophil cytoplasmic autoantibody (ANCA) associated vasculitis poses a significant clinical unmet need when determining relapsing or persisting disease. In this study, we demonstrate for the first time that attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy offers a novel and functional candidate biomarker, distinguishing active from quiescent disease with a high degree of accuracy. Paired blood and urine samples were collected within a single UK centre from patients with active disease, disease remission, disease controls and healthy controls. Three key biofluids were evaluated; plasma, serum and urine, with subsequent chemometric analysis and blind predictive model validation. Spectrochemical interrogation proved plasma to be the most conducive biofluid, with excellent separation between the two categories on PC2 direction (AUC 0.901) and 100% sensitivity (F-score 92.3%) for disease remission and 85.7% specificity (F-score 92.3%) for active disease on blind predictive modelling. This was independent of organ system involvement and current ANCA status, with similar findings observed on comparative analysis following successful remission-induction therapy (AUC > 0.9, 100% sensitivity for disease remission, F-score 75%). This promising technique is clinically translatable and warrants future larger study with longitudinal data, potentially aiding earlier intervention and individualisation of treatment.

Sign in / Sign up

Export Citation Format

Share Document