کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7873931 | 1509380 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface functionalization effects on structural, conformational, and optical properties of polyaniline nanofibers
ترجمه فارسی عنوان
اثرات کاربردی سطح بر خواص ساختاری، سازگاری و نوری نانو فیبرهای پلی آنیلین
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کلمات کلیدی
کاربردکردن سطح، نانو فیبرهای پلی آنیلین، تجزیه پلیمریزاسیون، طیف سنجی فلورسانس،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
چکیده انگلیسی
Polyaniline nanofibers have been synthesized by dilute polymerization technique and functionalized with glutaraldehyde under acidic condition. The effects of surface functionalization of polyaniline nanofibers on their structural, conformational, and optical properties have been investigated using transmission electron microscopy (TEM), X-ray diffraction, UV-visible, infrared, and fluorescence spectroscopy. TEM and UV-vis spectroscopy results depict that fiber diameter is decreased from 35.66 to 31.04Â nm on functionalization. XRD analysis suggests increased doping of surface functionalized polyaniline nanofibers (SF-PNFs) than that of the pristine polyaniline nanofibers (PNFs). Evolution of fluorescence peak at 452Â nm in the fluorescence spectra and disappearance of absorption peak at 630Â nm in the absorption spectra of surface functionalized polyaniline nanofibers (SF-PNFs) can be explained on the basis of the dynamic block co-polymeric structure of polyaniline (PAni). Study of optical properties shows that surface functionalization of polyaniline nanofibers (PNFs) brings about a partial transition of emeraldine base (EB) into emeraldine salt (ES) form of polyaniline. This is confirmed from the FTIR analysis, which depicts rearrangement in the polyaniline chain due to oxidation at the amine sites of benzenoid rings and reduction at the imine sites of quinoid rings after functionalization with glutaraldehyde due to its higher reactivity towards amine group. The possible mechanisms of functionalization of polyaniline nanofibers depending on different chemical structures of glutaraldehyde under acidic condition have been discussed in detail.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 197, November 2014, Pages 225-232
Journal: Synthetic Metals - Volume 197, November 2014, Pages 225-232
نویسندگان
Rajiv Borah, Somik Banerjee, Ashok Kumar,