碳纳米管在水泥基复合材料中的分散方法研究进展

碳纳米管(CNTs)作为性能优越的新型纳米材料被广泛用于增强基体材料,但是其易团聚且难以分散,使得实现其在基体材料中的均匀分散成为研究的重点。详细介绍了CNTs在增强水泥基复合材料研究中的分散方法与分散机理,并比较了各种分散方法的优缺点。重点论述了超声时间、酸处理时间、表面活性剂种类与掺量等因素对CNTs分散效果的影响,并讨论了评价CNTs分散效果的表征方法。将CNTs均匀分散到水泥基体中,可以显著提高复合材料的各项力学性能。

Review on Dispersion Methods of Carbon Nanotubes in Cement-based Composites

As a new nano-material with superior performance, carbon nanotubes (CNTs) have been widely used to enhance the matrix materials. Due to the characteristic of easy agglomeration of CNTs, how to disperse CNTs uniformly in the matrix materials capture much focus in the research field. The common dispersion methods and their mechanisms of CNTs in the cement-based composites are introduced in detail, and their respective advantages and disadvantages are compared. The effects of ultrasonic time, acid treatment time, the type and amount of surfactant on the dispersion of CNTs are fully illustrated. On this basis, the methods for characterizing dispersion effect of CNTs are also discussed. The mechanical properties of the composites can be significantly improved by dispersing CNTs into the cement matrix.