Effects of Carbon Black Surface Modification on the Morphology and Properties in Blends with Natural Rubber Studied with High-Resolution X-Ray Computed Tomography

IF 4.2 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yuting Wang, Wei Jiang, Keran Zhu, Lihui Wu, Liang Chen
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Abstract

To elucidate the specific mechanical impact of carbon black (CB) filler–rubber interactions on reinforcement, CB particles are subjected to graphitization at 1300 °C and oxidation through concentrated nitric acid treatment to modulate their surface activity. Alongside untreated CB particles, the influence of surface activity and the oxygen distribution are investigated to assess their role in shaping CB aggregate structures using X-ray absorption spectrum (XAS) and X-ray computed tomography (CT) with spatial resolution of 30 nm. Meanwhile, virgin and modified CBs are blended in natural rubber with varying amounts (10, 30, 50 phr) and the aggregates distributions in rubber are investigated by nano-CT. Combined with the mechanical properties of rubber composites and parameters of filler networks, the mechanical contributions arising from filler–rubber interactions are quantified. The findings underscore the robust interactions between oxidized CB and rubber matrix, exhibiting a mechanical property enhancement ratio of ≈59.2% at low strains in comparison to normal CB filler. The results indicate the synergies encompass of filler network, rubber chains, and filler–rubber interactions all play important roles for reinforcement, which aligns with the broader understanding of filler–rubber interactions and CB reinforcement mechanisms.

Abstract Image

Abstract Image

利用高分辨率 X 射线计算机断层扫描研究炭黑表面改性对天然橡胶共混物形态和性能的影响
为了阐明炭黑(CB)填料-橡胶相互作用对加固的具体机械影响,对 CB 颗粒进行了 1300 ℃ 石墨化和浓硝酸氧化处理,以调节其表面活性。除了未处理的 CB 颗粒外,还使用空间分辨率为 30 纳米的 X 射线吸收光谱 (XAS) 和 X 射线计算机断层扫描 (CT),研究了表面活性和氧分布的影响,以评估它们在形成 CB 聚合体结构中的作用。同时,将原生 CB 和改性 CB 以不同量(10、30、50 phr)混入天然橡胶中,并通过纳米 CT 研究橡胶中的聚集体分布。结合橡胶复合材料的机械性能和填料网络参数,对填料与橡胶相互作用产生的机械贡献进行了量化。研究结果表明,氧化 CB 与橡胶基体之间的相互作用很强,与普通 CB 填料相比,氧化 CB 在低应变下的机械性能增强率≈59.2%。研究结果表明,填料网络、橡胶链以及填料与橡胶之间的相互作用在补强过程中都发挥了重要作用,这与人们对填料与橡胶之间的相互作用以及 CB 补强机制的广泛理解不谋而合。
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来源期刊
Macromolecular Materials and Engineering
Macromolecular Materials and Engineering 工程技术-材料科学:综合
CiteScore
7.30
自引率
5.10%
发文量
328
审稿时长
1.6 months
期刊介绍: Macromolecular Materials and Engineering is the high-quality polymer science journal dedicated to the design, modification, characterization, processing and application of advanced polymeric materials, including membranes, sensors, sustainability, composites, fibers, foams, 3D printing, actuators as well as energy and electronic applications. Macromolecular Materials and Engineering is among the top journals publishing original research in polymer science. The journal presents strictly peer-reviewed Research Articles, Reviews, Perspectives and Comments. ISSN: 1438-7492 (print). 1439-2054 (online). Readership:Polymer scientists, chemists, physicists, materials scientists, engineers Abstracting and Indexing Information: CAS: Chemical Abstracts Service (ACS) CCR Database (Clarivate Analytics) Chemical Abstracts Service/SciFinder (ACS) Chemistry Server Reaction Center (Clarivate Analytics) ChemWeb (ChemIndustry.com) Chimica Database (Elsevier) COMPENDEX (Elsevier) Current Contents: Physical, Chemical & Earth Sciences (Clarivate Analytics) Directory of Open Access Journals (DOAJ) INSPEC (IET) Journal Citation Reports/Science Edition (Clarivate Analytics) Materials Science & Engineering Database (ProQuest) PASCAL Database (INIST/CNRS) Polymer Library (iSmithers RAPRA) Reaction Citation Index (Clarivate Analytics) Science Citation Index (Clarivate Analytics) Science Citation Index Expanded (Clarivate Analytics) SciTech Premium Collection (ProQuest) SCOPUS (Elsevier) Technology Collection (ProQuest) Web of Science (Clarivate Analytics)
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