Effect of interfacial state between pigment and binder on the UV curing proficiency

WANG Dehai; CHEN Xiaofang

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Effect of interfacial state between pigment and binder on the UV curing proficiency

更新时间：2023-03-30

- Effect of interfacial state between pigment and binder on the UV curing proficiency
- Journal of Radiation Research and Radiation Processing Vol. 22, Issue 6, Pages: 344-348(2004)
- 作者机构：
  
  1.浙江工业大学化学工程与材料学院　杭州　310014
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WANG Dehai, CHEN Xiaofang. Effect of interfacial state between pigment and binder on the UV curing proficiency. [J]. Journal of Radiation Research and Radiation Processing 22(6):344-348(2004)
DOI：

WANG Dehai, CHEN Xiaofang. Effect of interfacial state between pigment and binder on the UV curing proficiency. [J]. Journal of Radiation Research and Radiation Processing 22(6):344-348(2004) DOI：

摘要

本工作对颜料的表面改性及其对紫外光（UV）固化效率的影响进行了研究。研究发现，除了通常认为的颜料对UV的吸收以及散射会造成UV固化效率下降外，颜料表面与树脂的界面区域残存有空气成分也可能是造成彩色光固化涂层固化速度下降的另一个重要原因。电子能谱研究结果表明，三乙醇胺改性的艳佳丽蓝颜料不仅使得颜料/树脂界面的空气成分大幅减少，而且颜料与树脂的结合处改性前后的碳、氮、氧的组成成分、结合能都发生了明显的变化，存在着明显的界面耦联现象。颜料改性后，固化速度比未改性前有明显提高（例如，膜厚为125μm的涂料通过三乙醇胺对蓝色颜料改性，固化时间从45s减少到14s）。显然这与颜料/树脂界面的状态有关，说明通过颜料的改性来促进UV固化是可行的。研究结果对光固化彩色涂料的研究开发乃至光固化体系填料的使用等都具有积极意义。

Abstract

Effects of pigment modification to change pigment/binder interfacial characteristics and UV curing behavior were studied. The results show that the air absorbed on surface of the pigment plays an important role in hindering UV curing. In addition, there obviously exists the interface coupling effect between the pigment and the binder via the modifier of the pigment (reagent TEA). ESEM studies revealed that wetting property of the pigment was improved and binding between the pigment and the resin was strengthened after the pigment modification. EDS data showed an obvious enrichment of O−containing group of modification agent (−OH) in the interface and a shift of binding energy of the modifier was also detected. This may also contribute to the increase of curing proficiency due to the priority of the absorption of UV energy by the modifier TEA to that of pigment. The work demonstrated that the pigment modification could be used as a method to improve the UV curing efficiency. In the case of TEA, the curing rate of blue pigmented UV curable coating (125μm) could be improved greatly (from 45s to 14s). The study have shown a promising application of various kinds of fillers as well as pigment in UV coatings.

关键词

颜料表面改性紫外光固化界面

Keywords

PigmentModificationUV curingInterface

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