Development of surface modified SiO2 nanoparticles incorporated clearcoats for automotive industry

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2024-11-23 DOI:10.1016/j.surfin.2024.105491

Necati Güdümcüoğlu , Seçil Sevim Ünlütürk , İlayda Melek Çelik , Huriye Banu Yener , Şerife Şeref Helvaci

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引用次数: 0

Abstract

Evaluating organic-inorganic hybrid coatings containing modified nanoparticles may open up opportunities for the automotive industry. In this study, vinyltrimethoxysilane (VTMO) modified SiO₂ nanoparticles were synthesized to develop two-component High Solid (2K HS) hybrid clearcoats (CC) which require low-temperature curing. Hansen Solubility Parameters (HSP) and Design of Experiment (DOE) studies provided better optimization in terms of reaction parameters and suitable solvent prediction. Several characterization techniques like FTIR, SEM, and DLS techniques were performed to prove the successful modification of SiO₂ nanoparticles with silane agent, VTMO. HS Hybrid CC formulations were designed for the automotive industry with 1.75 and 3.00 phr (per hundred acrylic polyol resin) VTMO modified SiO₂ nanoparticles. Dynamic Mechanical Analysis (DMA) tests showed that toughness values increase with the nanofiller amount, in contrast to Young's modulus and yield strength due to the various interactions between nanofiller and the polyurethane polymer matrix. The free volume formed between VTMO ligands of the SiO₂ nanoparticles and the polymer matrix provides a low-density region which results in a decrease in time, temperature, and frequency dependent modulus values and glass transition temperature (T_g) of HS Hybrid CC system. Static and dynamic surface tension measurements, water uptake, and cure monitoring result that 1.75 phr nanofiller content in HS Hybrid CC enhances the performance of clearcoats significantly due to the formed low-density region between the nanofiller and the polymer matrix. However, further increase of the nanofiller causes agglomeration and consequently worse clearcoat performance. VTMO modified SiO₂ nanoparticles provide significant compatibility up to 1.75 phr and enhance the clearcoat performance in terms of mechanical strength for further usage in the automotive industry.

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开发用于汽车工业的表面改性二氧化硅纳米颗粒掺合清漆

评估含有改性纳米粒子的有机-无机混合涂料可能会为汽车行业带来机遇。本研究合成了乙烯基三甲氧基硅烷（VTMO）改性二氧化硅纳米粒子，用于开发需要低温固化的双组分高固（2K HS）混合清漆（CC）。汉森溶解度参数（HSP）和实验设计（DOE）研究在反应参数和合适的溶剂预测方面提供了更好的优化。傅立叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和 DLS 等表征技术证明了硅烷剂 VTMO 对二氧化硅纳米颗粒的成功改性。为汽车行业设计了 HS 混合 CC 配方，其中含有 1.75 和 3.00 phr（每百丙烯酸多元醇树脂）的 VTMO 改性 SiO2 纳米粒子。动态力学分析（DMA）测试表明，由于纳米填料与聚氨酯聚合物基体之间的各种相互作用，韧性值随纳米填料用量的增加而增加，与杨氏模量和屈服强度相反。二氧化硅纳米颗粒的 VTMO 配体与聚合物基体之间形成的自由体积提供了一个低密度区域，导致 HS 混合 CC 系统的模量值和玻璃化转变温度（Tg）随时间、温度和频率的变化而降低。静态和动态表面张力测量、吸水率和固化监测结果表明，由于在纳米填料和聚合物基体之间形成了低密度区域，HS Hybrid CC 中 1.75 phr 的纳米填料含量可显著提高清漆的性能。然而，进一步增加纳米填料会导致团聚，从而降低清漆性能。VTMO 改性二氧化硅纳米粒子具有显著的相容性，最高可达 1.75 phr，并在机械强度方面提高了清漆性能，可进一步用于汽车行业。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)