Effect of internal structure and resin deformability on drying rate and stress in convective drying of silica–latex coatings

IF 1.8 4区物理与天体物理 Q4 CHEMISTRY, PHYSICAL

The European Physical Journal E Pub Date : 2024-07-04 DOI:10.1140/epje/s10189-024-00432-9

Hiroaki Tanaka, Yoshiyuki Komoda, Takafumi Horie, Naoto Ohmura

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引用次数: 0

Abstract

Latex paint is an aqueous dispersion of nano-sized polymer particles that can form a thin film by itself or mixed with rigid particles. We have developed an apparatus that can simultaneously measure drying rate and stress generation and have investigated the film formation process of a latex-only coating layer under convection drying. In the present study, we adopted the same method to investigate the film formation process of the silica–latex coating layer. As a result, we were able to systematically correlate the drying rate change by the equivalent thickness of latex particles accumulated with silica particles at the drying surface. Furthermore, it is unveiled that the drying rate in the former stage depends on drying temperature, while the drying rate changed to be dominated by silica content after the particle-packing layer was formed over the entire coating layer. On the other hand, the model we proposed for stress generation, considering the temperature effect on latex deformability, was found to be applicable to the present experimental system by replacing a portion of deformable particles with rigid particles.

Graphical abstract

Abstract Image

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硅胶-乳胶涂料对流干燥中内部结构和树脂变形性对干燥速率和应力的影响

乳胶漆是一种纳米级聚合物颗粒的水性分散体，可以单独成膜，也可以与硬质颗粒混合成膜。我们开发了一种可同时测量干燥速率和应力产生的仪器，并研究了对流干燥条件下纯乳胶涂料层的成膜过程。在本研究中，我们采用了相同的方法来研究二氧化硅-乳胶涂层的成膜过程。结果，我们能够系统地将干燥速率的变化与干燥表面硅胶颗粒积累的乳胶颗粒等效厚度联系起来。此外，我们还发现，前一阶段的干燥速率取决于干燥温度，而在整个涂层上形成颗粒堆积层后，干燥速率则变为由二氧化硅含量主导。另一方面，考虑到温度对乳胶变形性的影响，我们提出的应力产生模型适用于本实验系统，即用刚性颗粒代替部分可变形颗粒。

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来源期刊

The European Physical Journal E CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

2.60

自引率

5.60%

发文量

审稿时长

3 months

期刊介绍： EPJ E publishes papers describing advances in the understanding of physical aspects of Soft, Liquid and Living Systems. Soft matter is a generic term for a large group of condensed, often heterogeneous systems -- often also called complex fluids -- that display a large response to weak external perturbations and that possess properties governed by slow internal dynamics. Flowing matter refers to all systems that can actually flow, from simple to multiphase liquids, from foams to granular matter. Living matter concerns the new physics that emerges from novel insights into the properties and behaviours of living systems. Furthermore, it aims at developing new concepts and quantitative approaches for the study of biological phenomena. Approaches from soft matter physics and statistical physics play a key role in this research. The journal includes reports of experimental, computational and theoretical studies and appeals to the broad interdisciplinary communities including physics, chemistry, biology, mathematics and materials science.