Compatibility of Sealing Elastomers With Palm Biodiesel (B100): Elastomer and Fuel Property Changes After Exposure

IF 2.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

ChemistrySelect Pub Date : 2026-09-23 DOI:10.1002/slct.74529

Valentina Cusba Arismendy, Erika Viviana Díaz Becerra, Helen Inciarte, Laura M. Orozco, Claudia Gómez, Luis Rios

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引用次数: 0

Abstract

The compatibility between biodiesel and elastomeric sealing materials is a key factor for the reliable operation of fuel storage and transportation systems. This study evaluates the interaction between B100 (pure) biodiesel and three elastomers used in sealing applications: ethylene-propylene-diene rubber (EPDM), nitrile-butadiene rubber (NBR), and fluorocarbon rubber (FKM). Immersion tests were conducted by exposing the elastomers to biodiesel at 70°C for 70 h. Changes in biodiesel properties and the elastomers were assessed. After exposure, no significant variations were detected in the fatty acid methyl ester (FAME) composition of the biodiesel. Fuel darkening, the formation of insoluble species at low temperatures, and the increase in induction time (oxidative stability test) were observed after elastomer exposure, suggesting the migration of elastomer-derived additives into biodiesel. EPDM showed the largest mass and volume increases, while NBR displayed intermediate behavior. FKM showed minimal changes and higher resistance to biodiesel-induced swelling. Mechanical characterization further indicated plasticization effects in EPDM and NBR. EPDM also exhibited the greatest reductions in hardness, tensile strength, and elongation at break. Compatibility trend under the studied conditions followed the order FKM >> NBR ≥ EPDM. Complementary field evaluations under real operating conditions confirmed satisfactory performance of NBR O-rings for 5 months.

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密封弹性体与棕榈生物柴油（B100）的相容性：暴露后弹性体和燃料特性的变化

生物柴油与弹性密封材料的相容性是保证燃料储运系统可靠运行的关键因素。本研究评估了B100（纯）生物柴油与三种用于密封的弹性体之间的相互作用：乙丙橡胶（EPDM）、丁腈橡胶（NBR）和氟碳橡胶（FKM）。将弹性体暴露在70°C的生物柴油中70小时，进行浸泡试验。评估生物柴油性能和弹性体的变化。暴露后，生物柴油的脂肪酸甲酯（FAME）组成没有明显变化。弹性体暴露后，燃料变暗，低温下形成不溶性物质，诱导时间增加（氧化稳定性测试），表明弹性体衍生添加剂迁移到生物柴油中。EPDM的质量和体积增加幅度最大，而NBR则表现为中间行为。FKM表现出最小的变化和更高的抵抗生物柴油诱导的肿胀。力学表征进一步表明EPDM和丁腈橡胶的塑化作用。EPDM也表现出硬度、抗拉强度和断裂伸长率的最大降低。研究条件下的相容性趋势为FKM >；> NBR≥EPDM。在实际操作条件下进行的补充现场评估证实，NBR o -环的性能令人满意，持续了5个月。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ChemistrySelect Chemistry-General Chemistry

CiteScore

3.30

自引率

4.80%

发文量

1809

审稿时长

1.6 months

期刊介绍： ChemistrySelect is the latest journal from ChemPubSoc Europe and Wiley-VCH. It offers researchers a quality society-owned journal in which to publish their work in all areas of chemistry. Manuscripts are evaluated by active researchers to ensure they add meaningfully to the scientific literature, and those accepted are processed quickly to ensure rapid online publication.