Yaser Rashidi , Lily Li , Asghar Habibnejad Korayem
{"title":"生物聚合物辅助稳定的哈洛石纳米管在碱性环境中的分散及其在水泥基复合材料中的应用","authors":"Yaser Rashidi , Lily Li , Asghar Habibnejad Korayem","doi":"10.1016/j.cemconres.2024.107574","DOIUrl":null,"url":null,"abstract":"<div><p>The colloidal dispersion of biopolymer-treated HNTs in the cementitious environment was studied. Three different biopolymer treatments, namely casein (C), guar gum (GG), and xanthan gum (XG), were utilized to prepare the stable colloidal dispersions of HNTs in such environments. The examination of the dispersion and time-dependent stability of untreated HNTs in a synthetic pore solution (SPS) revealed rapid agglomeration and settling of the particles. Specifically, the stabilization of XG-treated HNTs was superior compared to those treated with GG and C biopolymers. XG-treated HNT suspension in the pH 13 environment existed as monodisperse nanoparticles centered around 20 nm, while bare HNTs existed as polydisperse across 200 nm to 7000 nm. Moreover, XG-treated HNTs boosted cement mortar samples, increasing compressive strength by 29.4 % and reducing initial and final water absorption by 15.8 % and 19.9 %, respectively, after 90 days. Furthermore, the microstructural morphology of the HNT-XG-modified mortar exhibited improved compactness and homogeneity.</p></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":null,"pages":null},"PeriodicalIF":10.9000,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Biopolymer-assisted stable halloysite nanotubes dispersion in alkaline environment and their application in cementitious composite\",\"authors\":\"Yaser Rashidi , Lily Li , Asghar Habibnejad Korayem\",\"doi\":\"10.1016/j.cemconres.2024.107574\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The colloidal dispersion of biopolymer-treated HNTs in the cementitious environment was studied. Three different biopolymer treatments, namely casein (C), guar gum (GG), and xanthan gum (XG), were utilized to prepare the stable colloidal dispersions of HNTs in such environments. The examination of the dispersion and time-dependent stability of untreated HNTs in a synthetic pore solution (SPS) revealed rapid agglomeration and settling of the particles. Specifically, the stabilization of XG-treated HNTs was superior compared to those treated with GG and C biopolymers. XG-treated HNT suspension in the pH 13 environment existed as monodisperse nanoparticles centered around 20 nm, while bare HNTs existed as polydisperse across 200 nm to 7000 nm. Moreover, XG-treated HNTs boosted cement mortar samples, increasing compressive strength by 29.4 % and reducing initial and final water absorption by 15.8 % and 19.9 %, respectively, after 90 days. Furthermore, the microstructural morphology of the HNT-XG-modified mortar exhibited improved compactness and homogeneity.</p></div>\",\"PeriodicalId\":266,\"journal\":{\"name\":\"Cement and Concrete Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":10.9000,\"publicationDate\":\"2024-06-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cement and Concrete Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0008884624001558\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cement and Concrete Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0008884624001558","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Biopolymer-assisted stable halloysite nanotubes dispersion in alkaline environment and their application in cementitious composite
The colloidal dispersion of biopolymer-treated HNTs in the cementitious environment was studied. Three different biopolymer treatments, namely casein (C), guar gum (GG), and xanthan gum (XG), were utilized to prepare the stable colloidal dispersions of HNTs in such environments. The examination of the dispersion and time-dependent stability of untreated HNTs in a synthetic pore solution (SPS) revealed rapid agglomeration and settling of the particles. Specifically, the stabilization of XG-treated HNTs was superior compared to those treated with GG and C biopolymers. XG-treated HNT suspension in the pH 13 environment existed as monodisperse nanoparticles centered around 20 nm, while bare HNTs existed as polydisperse across 200 nm to 7000 nm. Moreover, XG-treated HNTs boosted cement mortar samples, increasing compressive strength by 29.4 % and reducing initial and final water absorption by 15.8 % and 19.9 %, respectively, after 90 days. Furthermore, the microstructural morphology of the HNT-XG-modified mortar exhibited improved compactness and homogeneity.
期刊介绍:
Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.