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Journals / Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi / 2020 / Cilt: 20 - Sayı: 3

Use of Block Copolymer Stabilized Polystyrene Microspheres as Templates for Preparation of Hollow Metal Oxide Spheres

İçi Kovuk Metal Oksit Kürelerin Hazırlanmasında Blok Kopolimer İle Stabilize Edilmiş Polistiren Mikrokürelerin Şablon Olarak Kullanımı

Gökhan KOÇAK
Pages
398–406
Publication Date
2022-10-12
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The outer layer of hollow spheres was found to have a rather rough outer surface, which offers significant advantages for catalysis studies.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, poly[2-(diethylamino) ethyl methacrylate-block-2-(dimethylamino) ethyl methacrylate] (PDEA-b-PDMA) diblock copolymer stabilized polystyrene (PS) microspheres were used as a template in the production of double layer manganese oxide@nickel oxide hollow spheres.
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Key Findings & Data:Monodispers PS microspheres stabilized with block copolymer by emulsion polymerization were coated with metal oxide precursors using the controlled precipitation method of KMnO4 and NiSO4, respectively.
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Conclusion & Impact:The outer layer of hollow spheres was found to have a rather rough outer surface, which offers significant advantages for catalysis studies.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, poly[2-(diethylamino) ethyl methacrylate-block-2-(dimethylamino) ethyl methacrylate] (PDEA-b-PDMA) diblock copolymer stabilized polystyrene (PS) microspheres were used as a template in the production of double layer manganese oxide@nickel oxide hollow spheres. Monodispers PS microspheres stabilized with block copolymer by emulsion polymerization were coated with metal oxide precursors using the controlled precipitation method of KMnO4 and NiSO4, respectively. Double layer manganese oxide@nickel oxide hollow spheres were produced by calcination process. PS spheres and hollow metal spheres were characterized by dynamic light scattering (DLS), thermogravimetric analysis (TGA), light microscope, X-ray diffraction (XRD) and scanning electron microscope (SEM). The weight of the manganese oxide@nickel oxide hollow spheres in the inner layer of the manganese oxide is quite low (~4%), while the outer layer of the nickel oxide layer is quite high (~96%). The produced metal oxide spheres have a diameter of 1.60-1.77 µm and the shell thickness of the spheres is around 200 nm. The outer layer of hollow spheres was found to have a rather rough outer surface, which offers significant advantages for catalysis studies.

Özet

Bu çalışmada, çift tabakalı mangan oksit@nikel oksit içi kovuk kürelerin üretiminde şablon olarak poli[2-(dietilamino)etil metakrilat-blok-2-(dimetilamino)etil metakrilat] (PDEA-b-PDMA) diblok kopolimer ilestabilize edilmiş polistiren (PS) mikroküreleri kullanıldı. Emülsiyon polimerizasyonu ile blok kopolimer ilestabilize edilmiş eş dağılımlı PS mikroküreler sert şablon olarak kullanılarak sırasıyla KMnO4 ve NiSO4’ünkontrollü çöktürme yöntemiyle metal oksit öncüsü bileşikler ile kaplandı. Kalsinasyon işlemi ile manganoksit@nikel oksit içi kovuk çift tabakalı metal oksit küreler üretildi. PS küreler ve içi kovuk metal kürelerdinamik ışık saçılması (DLS), termogravimetrik analiz (TGA), ışık mikroskobu, X-ışını kırınımı (XRD) vetaramalı elektron mikroskobu (SEM) ile karakterize edildi. Mangan oksit@nikel oksit içi kovuk kürelerin,iç tabakasında kalan mangan oksit tabakasının ağırlıkça oranı oldukça düşükken (~%4), dış tabakasındayer alan nikel oksit tabakasının ağırlıkça oldukça yüksektir (~%96). Üretilen metal oksit kürelerin 1,60-1,77 µm çapında olduğu ve bu kürelerin kabuk kalınlığının ise 200 nm civarındadır. İçi kovuk kürelerindış tabakası, kataliz çalışmaları için önemli avantajlar sunan oldukça pürüzlü bir dış yüzeye sahip olduğutespit edildi.

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Cite This Article

KOÇAK, G. (2022). Use of Block Copolymer Stabilized Polystyrene Microspheres as Templates for Preparation of Hollow Metal Oxide Spheres. Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, Cilt: 20 - Sayı: 3, 398–406. https://ajindex.com/articles/429767

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