کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
692720 889850 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
One-pot synthesis of gelatin-based, slow-release polymer microparticles containing silver nanoparticles and their application in anti-fouling paint
ترجمه فارسی عنوان
سنتز یک گلدان از میکروارگانیسم های پلیمری مبتنی بر ژلاتین حاوی نانوذرات نقره و کاربرد آنها در رنگ ضد فتق
کلمات کلیدی
نانوذرات نقره، میکرو ذرات ژلاتین، انتشار آهسته ضد فساد، کپسوله سازی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی


• Gelatin–urea–formaldehyde microparticles embedded with nano-silver were prepared.
• Novel w/o type dispersion polymerization results in non-swelling gelatinous matrices.
• Particle shaping, cross-linking runs together with in situ silver reduction.
• The product serves as additive for coatings used in wet conditions.
• Sustained release of silver and its elongated anti-fouling effect is demonstrated.

Gelatinous polymer matrix microparticles containing silver nanoparticles (AgNPs) were prepared by a novel method to obtain quasi non-swelling anti-fouling paint additives with slow-release characteristics. A w/o type dispersion were elaborated with the aqueous phase of gelatin, urea, silver-nitrate and formaldehyde dispersed in linseed oil. Gelatin was cross-linked by formaldehyde, together with urea for limiting the swelling of the product. Silver-nitrate was reduced with the assistance of gelatin and formaldehyde into homogenously dispersed AgNPs. The microparticles and embedded AgNPs were visualized by scanning and transmission electronmicroscopy. Encapsulated AgNPs with ∼18 nm crystallite size were identified by X-ray powder diffraction. Characterization of gelatin–urea–formaldehyde polymer matrices was carried out by attenuated total reflectance FTIR spectroscopy. Silver dissolution from microparticles and paints with AgNP-containing microparticles was measured by inductively coupled plasma spectrometer and resulted in highly sustained release, compared to unmodified gelatin microparticles and paints containing uncapsulated silver salts. A 7-month-long fouling experiment run in natural sweetwater media showed that solvent-based acrylic paint with AgNPs-containing gelatinous microparticles as additives offered resistance against biofouling at low Ag-release ratio.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 77, Issue 7, July 2014, Pages 1226–1232
نویسندگان
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