سنتز یک مرحله ای نانوسیلیکای آبگریز با استفاده از الکل زنجیر بلند 1-اکتادکانول

نوع مقاله : علمی و پژوهشی

نویسندگان

• ملیحه درگاهی زابلی ¹
• اقبال صحرایی ¹
• بهزاد پورعباس ¹
• برایان کرگل ²

¹ دانشگاه صنعتی سهند تبریز

² دانشگاه تکزاس در آستین

10.22067/ma.v0i29.40156

چکیده

در این مقاله، سنتز نانوذرات سیلیکا همزمان با اصلاح سطح آنها به کمک الکل زنجیره بلند 1-اکتادکانول در دمای 70 درجه سانتیگراد مطابق روش استوبر انجام شده است. میزان آبگریزی ذرات با افزایش درصد 1-اکتادکانول تا رسیدن به غلظت 7 درصد وزنی به میزان قابل توجهی افزایش یافته و اصلاح سطح در طول 90 دقیقه اول واکنش کامل شده و زمان واکنش بیش از 90 دقیقه تاثیر چندانی بر میزان آبگریزی ذرات نگذاشته است. حداکثر اصلاح سطح نانوذرات سیلیکا درpH حدود 8 صورت پذیرفته است. اصلاح سطح با استفاده از آنالیز جذب اشعه مادون قرمز، آنالیز گرمایی TGA و بررسی زاویه تماس تأیید شده است. انکسار اشعه ایکس و تصاویر میکروسکوپ الکترونی عبوری برای بررسی مورفولوژی و اندازه نانوذرات سیلیکا به کار گرفته شده است.

کلیدواژه‌ها

• سنتز یک مرحله‌ای، اصلاح سطح
• نانوذرات سیلیکا
• 1-اکتادکانول
• آبگریز
• روش استوبر

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عنوان مقاله [English]

One-Pot Synthesis of Hydrophobic Silica Nano Particles with Long-Chain Alcohol 1-Octadecanol

نویسندگان [English]

• Maliheh Dargahi Zaboli ¹
• Eghbal Sahraei ¹
• Behzad Pourabbas ¹
• Brain Korgel ²

¹ Sahand university of technology

² Umiversity of Texas at Austin

چکیده [English]

In this work, one-pot synthesis of modified silica nanoparticles with long-chain alcohol 1-Octadecanol by stober method at 70 C is presented. Hydrophobicity of particles increased dramatically by increasing the amount of 1-Octadecanol up to 7 wt.%. Surface modification was completed during the first 90 minutes. Additional reaction time had no further effect. The most possible modification was obtained when the reaction took place at pH=8. Successful surface modification was confirmed by FT-IR spectroscopy, thermogravimetric analyses and contact angle measurements. X-ray diffraction patterns indicate an amorphous structure which did not significantly change by surface modification. Transmission electron microscopy images were used to investigate the morphology and dimension of the silica particles.

کلیدواژه‌ها [English]

• One-Pot Synthesis
• Surface Modification
• Silica Nanoparticles
• Hydrophobic
• 1-Octadecanol
• Stober Method

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