Superflexible yet robust functionalized carbon nanotube fiber reinforced sulphoaluminate cement-based grouting materials with excellent mechanical, electrical and thermal properties,Construction and Building Materials

当前位置： X-MOL 学术 › Constr. Build. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Superflexible yet robust functionalized carbon nanotube fiber reinforced sulphoaluminate cement-based grouting materials with excellent mechanical, electrical and thermal properties
Construction and Building Materials ( IF 7.4 ) Pub Date : 2022-03-10 , DOI: 10.1016/j.conbuildmat.2022.126999
Zhengpeng Yang ₁ , Junfei Yang _{1,

2} , Bo Shuai ₁ , Yutao Niu _{3,

4} , Zhenzhong Yong _{2,

3} , Kunjie Wu _{2,

3} , Chunjing Zhang ₁ , Xiangyu Qiao ₁ , Yongyi Zhang _{2,

3,

4}

Affiliation

Fiber-reinforced cement-based grouting material has triggered strong interest owing to its promising application in coal mining. However, how to enable a combined feature of great robustness, exceptional electrical and thermal behaviors, which is crucial for high-performance realization, still remains a significant challenge. Herein, an effective and facile strategy to address the issue was proposed by manufacturing functionalized carbon nanotube (CNT) fibers featuring prominent flexibility, excellent water dispersibility, superior tensile strength and electrical conductivity. Benefiting from the chemical bonds generated between cement hydration product and CNT-COOH fiber effectively embedded into cement matrix, the obtained fiber-cement hybrid with water-cement ratio of 0.8 and 0.5% fiber content was integrated into a whole, with flexural strength (4.8 MPa) and compressive strength (27 MPa) increased by 50% and 30%, respectively, compared to control sample after curing for 28 days. Meanwhile, attributing to the formation of interconnected network architecture built by CNT-COOH fibers in the cement matrix, the hybrid featured a significantly enhanced performance in heat transfer and electrical conductivity, which was further improved under loading. This work has shed light on new strategies for manufacturing carbon-based fiber reinforced cement-based grouting materials with great robustness, prominent electrical and thermal behaviors toward future uses.

中文翻译：

超柔韧而坚固的功能化碳纳米管纤维增强硫铝酸盐水泥基灌浆材料，具有优异的机械、电气和热性能

纤维增强水泥基灌浆材料因其在煤矿开采中的广阔应用而引起了人们的浓厚兴趣。然而，如何实现对高性能实现至关重要的出色稳健性、出色电气和热行为的组合功能仍然是一个重大挑战。在此，通过制造具有突出柔韧性、优异水分散性、优异拉伸强度和导电性的功能化碳纳米管（CNT）纤维，提出了一种有效而简单的策略来解决这个问题。得益于水泥水化产物与CNT-COOH纤维之间产生的化学键有效嵌入水泥基体中，获得的纤维-水泥混合体（纤维含量为0.8%和0.5%）被整合成一个整体，养护28 d后，弯曲强度（4.8 MPa）和抗压强度（27 MPa）分别比对照样品提高了50%和30%。同时，由于 CNT-COOH 纤维在水泥基体中构建了互连网络架构，该混合物在传热和导电性能方面显著提高，在负载下进一步提高。这项工作阐明了制造碳基纤维增强水泥基灌浆材料的新策略，这些材料具有很强的坚固性、突出的电和热行为，面向未来的应用。

更新日期：2022-03-10

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南