Online from: 1972
Subject Area: Mechanical & Materials Engineering
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|Title:||Encapsulated phthalocyanine blue pigment with polymerisable dispersant for inkjet printing inks|
|Author(s):||Shai Fu, (Key Laboratory for Eco-Textile of Ministry of Education, Jiangnan University, Wuxi, China), Kai Zhang, (Key Laboratory for Eco-Textile of Ministry of Education, Jiangnan University, Wuxi, China), Mingjun Zhhang, (Key Laboratory for Eco-Textile of Ministry of Education, Jiangnan University, Wuxi, China), Li Tian, (Key Laboratory for Eco-Textile of Ministry of Education, Jiangnan University, Wuxi, China)|
|Citation:||Shai Fu, Kai Zhang, Mingjun Zhhang, Li Tian, (2012) "Encapsulated phthalocyanine blue pigment with polymerisable dispersant for inkjet printing inks", Pigment & Resin Technology, Vol. 41 Iss: 1, pp.3 - 8|
|Keywords:||Dispersion, Encapsulated, Inkjet printing ink, Phthalocyanine blue pigment, Pigments, Polymerizable dispersant, Polymerization, Rheology, Textiles|
|Article type:||Research paper|
|DOI:||10.1108/03699421211192226 (Permanent URL)|
|Publisher:||Emerald Group Publishing Limited|
|Acknowledgements:||This work was supported by PhD Science Foundation for Industry of Jiangsu Province (BK2009582) and the authors also thank Jiangnan University for support during the course of this research.|
Purpose – The purpose of this paper is to provide a novel method for encapsulation of phthalocyanine blue pigment for inkjet printing inks.
Design/methodology/approach – Phthalocyanine blue pigment was encapsulated by emulsion polymerisation of styrene and a polymerisable dispersant, allyloxy nonyl-phenoxy propanol polyoxyethylene ether ammonium sulphonate (ANPS). The encapsulated phthalocyanine blue pigment was further formulated into dispersion. The encapsulated phthalocyanine blue pigment was characterised with transmission electron microscopy (TEM), thermogravimetric analyses (TGA), X-ray diffraction (XRD), Zeta potential and contact angle measurements. The encapsulated phthalocyanine blue pigment dispersion was evaluated in terms of rheological behaviour, particle size distribution and stability.
Findings – TEM and TGA proved that polymer encapsulation layer was formed onto phthalocyanine blue pigment surface. XRD indicated that the crystal structure of phthalocyanine blue pigment was not changed during the encapsulation process. The wettability of phthalocyanine blue pigment was improved after polymer encapsulation. The dispersion formulated with encapsulated phthalocyanine blue pigment had a narrow particle size distribution, excellent stability to temperature and centrifugal forces. Its rheological behaviour was close to Newtonian fluid.
Practical implications – The methods provided a novel and practical solution for preparing the encapsulated phthalocyanine blue pigment dispersion for formulation of inkjet printing ink.
Originality/value – The paper demonstrates how emulsion polymerisation technique is employed to encapsulate phthalocyanine blue pigment using a polymerisable dispersant, ANPS, which imparts to dispersion a small particle size, narrow particle size distribution and high stability.
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