Zhao Liyuan, Wang Man, Zhang Liwei, Sadeghzadeh Seyed Mohsen
School of Civil Engineering and Architecture, XinXiang University, XinXiang, 453003, China.
School of Civil and Architectural Engineering, Zhengzhou University of Science and Technology, Zhengzhou, 450064, China.
Heliyon. 2024 May 21;10(11):e31576. doi: 10.1016/j.heliyon.2024.e31576. eCollection 2024 Jun 15.
Dendritic fibrous nanosilica (DFNS) was functionalized using microcrystalline chitosan, derived from shrimp exoskeletons, to act as a robust anchor, resulting in DFNS@Chitosan. In order to prevent the restacking of chitosan sheets, the supramolecular polymerized chitosan not only served as a spacer but was also incorporated into cement-based composites. The physical-chemical characteristics of DFNS@Chitosan were assessed through various analytical techniques such as TEM, SEM, TGA, FTIR, AFM, XPS, and EDX. The potency and auto-induced contraction of Cement-based composite materials fortified with DFNS@Chitosan were probed. The incorporation of DFNS@Chitosan resulted in an increase in both compressive and interfacial stretching potency of the cement-based composites. Furthermore, the presence of DFNS@Chitosan effectively inhibited the occurrence of auto-induced contraction in the cement-based paste. This research endeavor is anticipated to promote an alternative utilization of DFNS and shrimp waste shells in the development of sustainable building materials.
树枝状纤维纳米二氧化硅（DFNS）使用从虾外骨骼衍生而来的微晶壳聚糖进行功能化处理，以充当坚固的锚定物，从而得到DFNS@壳聚糖。为了防止壳聚糖片层的重新堆叠，超分子聚合壳聚糖不仅充当间隔物，还被掺入水泥基复合材料中。通过透射电子显微镜（TEM）、扫描电子显微镜（SEM）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）、原子力显微镜（AFM）、X射线光电子能谱（XPS）和能量色散X射线光谱（EDX）等各种分析技术对DFNS@壳聚糖的物理化学特性进行了评估。对用DFNS@壳聚糖增强的水泥基复合材料的强度和自收缩性能进行了探究。DFNS@壳聚糖的掺入导致水泥基复合材料的抗压强度和界面拉伸强度均有所提高。此外，DFNS@壳聚糖的存在有效地抑制了水泥基浆料中自收缩的发生。预计这项研究工作将促进在可持续建筑材料开发中对DFNS和虾壳废料的替代利用。
