CAJ | 학술논문

为了研究碳纳米管及其分散性对水泥砂浆性能的影响，分别采用聚乙烯毗咯烷酮（PVP）和十二烷基磺酸钠（SDBS）两种分散剂制备了不同浓度的碳纳米管水性分散体，探讨了不同碳纳米管水性分散体对水泥砂浆强度及微结构性能的影响．实验结果表明：分散剂对碳纳米管在水中的分散效果影响显著，与SDBS相比，采用PVP为分散剂的碳纳米管水性分散体分散性和稳定性更好；分散性良好的碳纳米管能改善水泥砂浆微结构，提高水泥砂浆的抗压、抗折强度，具有较好的增强效果，当碳纳米管掺量为0．5％时，水泥砂浆28 d抗折强度和抗压强度分别提高了49．4％和40．8％．
위료연구탄납미관급기분산성대수니사장성능적영향，분별채용취을희비각완동（PVP）화십이완기광산납（SDBS）량충분산제제비료불동농도적탄납미관수성분산체，탐토료불동탄납미관수성분산체대수니사장강도급미결구성능적영향．실험결과표명：분산제대탄납미관재수중적분산효과영향현저，여SDBS상비，채용PVP위분산제적탄납미관수성분산체분산성화은정성경호；분산성량호적탄납미관능개선수니사장미결구，제고수니사장적항압、항절강도，구유교호적증강효과，당탄납미관참량위0．5％시，수니사장28 d항절강도화항압강도분별제고료49．4％화40．8％．
In order to study the effects of carbon nanotubes(CNTs)and their dispersion on the per-formance of cement mortars,the aqueous dispersions of carbon nanotubes are prepared using polyvi-nylpyrrolidone (PVP)and sodium dodecyl benzene sulfonate (SDBS)as dispersant,respectively, and their influences on the mechanical and microstructural properties of cement mortars are studied. The experimental results show that dispersant can significantly affect the dispersion of carbon nano-tubes in water.Compared with SDBS as dispersant,the CNTs solution with PVP as dispersant has more uniform dispersion and higher stability.In addition,highly dispersed carbon nanotubes can densify paste microstructure and improve cement mortar's mechanical properties as well.0.5%addi-tion of CNTs can improve the flexural and compressive strength of cement mortars at 28 d by 49 .4%and 40.8%,respectively.