کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1440259 1509362 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Functionalized polyanilines made by nucleophilic addition reaction, applied in gas sensors field
ترجمه فارسی عنوان
پلینیولین های کاربردی ساخته شده بوسیله واکنش تکمیلی نوکلئوفیلی که در زمینه سنسورهای گاز اعمال می شوند
کلمات کلیدی
سنسورهای مقاومت پلی آنیلین؛ ترکیبات فرار آلی؛ پلیمرهای اصلاح شده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
چکیده انگلیسی


• Synthesis and characterization of functionalized polyanilines are shown.
• The use of modified PANI as resistive sensor is demonstrated.
• These materials improve the detection of volatiles compound.
• The functionalized polyanilines allow producing specific sensors for organic volatile compounds.
• The polymers allow building resistive multisensor.

Resistive sensors for organic volatile compounds are built using functionalized polyanilines. The functionalization of polyaniline (PANI) is achieved by nucleophilic addition with thiols and is confirmed by X-ray Photoelectron Spectroscopy. The modified polymers tested as resistive sensors change the polymer sensitivity to volatile compounds. PANI shows a signal that increases when the chain length increases, however, functionalized polyanilines show a completely different behaviour. The sensitivity to long chain alcohols increases when PANI is modified with long alkyl chains, the opposite behaviour occurs when more hydrophilic groups are bonding to the polymer. We conclude that the different sensitivity of the functionalized polyanilines to the same volatile molecule allows identifying the analyte. In that way, multisensor arrays based on these materials could be used as an electronic nose. To explain this behaviour measurements of contact angle were performed. The data reveal that all modified polyanilines are more hydrophobic than PANI, this is likely to be due to the presence of the sulphur atoms. Therefore, we conclude that the hydrophobic/hydrophilic nature of the surface plays an important role but is not decisive in the sensor response. Also, Van der Waals interactions between the alkyl chains bound to de PANI and present in the sensed alcohols play an important role. Accordingly, the sensitivity for a plain alkane (heptane) increases strongly when PANI is modified with long alkyl chains.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 215, May 2016, Pages 127–133
نویسندگان
, , , , , , ,