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用于涂料应用的含改性天然橡胶胶乳的水性环氧基树脂的研制。

Development of waterborne epoxy-based resin incorporated with modified natural rubber latex for coating application.

作者信息

Tessanan Wasan, Ratvijitvech Thanchanok, Thanawan Sombat, Amornsakchai Taweechai, Phinyocheep Pranee

机构信息

Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Payathai, Bangkok, 10400, Thailand.

Rubber Technology Research Center, Faculty of Science, Mahidol University, Phutthamonthon Sai 4, Nakhon Pathom, 73170, Thailand.

出版信息

Sci Rep. 2024 Nov 4;14(1):26603. doi: 10.1038/s41598-024-77990-7.

DOI:10.1038/s41598-024-77990-7
PMID:39496782
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11535026/
Abstract

Water-based coating has gained much attention globally due to environmental issues. This work aims to develop a waterborne epoxy coating incorporated with modified natural rubber (NR) latex for improved performance. For this purpose, the NR latex was modified into three types of low molecular weight epoxidized natural rubber (LENR) latex. The waterborne epoxy resin was prepared by simply mixing the epoxy resin with an amine curing agent in water and various LENR latex contents (10 to 50 wt%). The waterborne epoxy/LENR blend was coated on a tin substrate and the cured coating demonstrated better adhesion and bending properties than the neat epoxy. Phase morphological properties displayed a rough surface with a heterogeneous surface structure of the dispersed rubber and epoxy matrix. Two glass transition temperatures were observed, corresponding to the rubber modifier and the epoxy matrix. The mechanical properties of the thermosetting epoxy/LENR blends were assessed, revealing a maximum increment in elongation ability by approximately 370% for adding 50 wt% LENR, compared to the neat epoxy. These results hold the potential avenue for utilizing NR-based material in the waterborne epoxy-based resin for coating applications. Furthermore, it contributes to the NR, a renewable and eco-friendly material, in the coating technology, embracing a sustainable future.

摘要

由于环境问题，水性涂料在全球范围内受到了广泛关注。这项工作旨在开发一种掺入改性天然橡胶（NR）胶乳的水性环氧涂料，以提高其性能。为此，将NR胶乳改性为三种类型的低分子量环氧化天然橡胶（LENR）胶乳。通过将环氧树脂与胺类固化剂在水中简单混合，并加入不同含量（10至50 wt%）的LENR胶乳，制备了水性环氧树脂。将水性环氧/LENR共混物涂覆在马口铁基材上，固化后的涂层表现出比纯环氧树脂更好的附着力和弯曲性能。相形态学性能显示，分散橡胶和环氧基体的表面结构不均匀，表面粗糙。观察到两个玻璃化转变温度，分别对应于橡胶改性剂和环氧基体。对热固性环氧/LENR共混物的力学性能进行了评估，结果表明，与纯环氧树脂相比，添加50 wt% LENR时，伸长能力最大可提高约370%。这些结果为在水性环氧基树脂中利用基于NR的材料进行涂料应用提供了潜在途径。此外，它有助于在涂料技术中使用可再生且环保的材料NR，迎接可持续发展的未来。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/72183a8924fc/41598_2024_77990_Fig13_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/1a33257fc0ca/41598_2024_77990_Fig8_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/72183a8924fc/41598_2024_77990_Fig13_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/501d4ad14759/41598_2024_77990_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/1154eca67981/41598_2024_77990_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/09e85f83c082/41598_2024_77990_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/684c38d90640/41598_2024_77990_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/6354d5aadc76/41598_2024_77990_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/49783b8af9d5/41598_2024_77990_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/33e3b6ad4aef/41598_2024_77990_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/1a33257fc0ca/41598_2024_77990_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/aef1498055c9/41598_2024_77990_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/fc0849ad0b4c/41598_2024_77990_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/4dd90c715d2f/41598_2024_77990_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/2ada481867e3/41598_2024_77990_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d11c/11535026/72183a8924fc/41598_2024_77990_Fig13_HTML.jpg

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