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聚合物分散剂对氧化石墨烯纳米片在水泥基复合材料中的分散作用及其相关微观结构/性能的研究

Investigation of the Effects of Polymer Dispersants on Dispersion of GO Nanosheets in Cement Composites and Relative Microstructures/Performances.

作者信息

Lv Shenghua, Hu Haoyan, Hou Yonggang, Lei Ying, Sun Li, Zhang Jia, Liu Leipeng

机构信息

College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.

School of Materials Science and Chemical Engineering, Xi'An Technologyical University, Xi'an 710021, China.

出版信息

Nanomaterials (Basel). 2018 Nov 22;8(12):964. doi: 10.3390/nano8120964.

DOI:10.3390/nano8120964
PMID:30469503
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6316744/
Abstract

This study focused on the uniform distribution of graphene oxide (GO) nanosheets in cement composites and their effect on microstructure and performance. For this, three polymer dispersants with different level of polar groups (weak, mild, and strong) poly(acrylamide-methacrylic acid) (PAM), poly(acrylonitrile-hydroxyethyl acrylate) (PAH), and poly(allylamine-acrylamide) (PAA) were used to form intercalation composites with GO nanosheets. The results indicated that GO nanosheets can exist as individual 1⁻2, 2⁻5, and 3⁻8 layers in GO/PAA, GO/PAH, and GO/PAM intercalation composites, respectively. The few-layered (1⁻2 layers) GO can be uniformly distributed in cement composites and promote the formation of regular-shaped crystals and a compact microstructure. The compressive strengths of the blank, control, GO/PAM, GO/PAH, and GO/PAA cement composites were 55.72, 78.31, 89.75, 116.82, and 128.32 MPa, respectively. Their increase ratios relative to the blank sample were 40.54%, 61.07%, 109.66%, and 130.29%, respectively. Their corresponding flexural strengths were 7.53, 10.85, 12.35, 15.97, and 17.68 MPa, respectively, which correspond to improvements of 44.09%, 64.01%, 112.09%, and 134.79%.

摘要

本研究聚焦于氧化石墨烯（GO）纳米片在水泥基复合材料中的均匀分布及其对微观结构和性能的影响。为此，使用了三种具有不同极性基团水平（弱、中、强）的聚合物分散剂，即聚丙烯酰胺 - 甲基丙烯酸（PAM）、聚丙烯腈 - 丙烯酸羟乙酯（PAH）和聚烯丙胺 - 丙烯酰胺（PAA），来与GO纳米片形成插层复合材料。结果表明，在GO/PAA、GO/PAH和GO/PAM插层复合材料中，GO纳米片分别以单层 - 2层、2 - 5层和3 - 8层的形式存在。少层（1 - 2层）的GO能够均匀分布在水泥基复合材料中，并促进规则形状晶体的形成和致密微观结构的形成。空白、对照、GO/PAM、GO/PAH和GO/PAA水泥基复合材料的抗压强度分别为55.72、78.31、89.75、116.82和128.32 MPa。它们相对于空白样品的增加率分别为40.54%、61.07%、109.66%和130.29%。它们相应的抗折强度分别为7.53、10.85、12.35、15.97和17.68 MPa，对应提高了44.09%、64.01%、112.09%和134.79%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/0410202d6726/nanomaterials-08-00964-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/b2c4bbb9d4ef/nanomaterials-08-00964-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/12023b73e4e5/nanomaterials-08-00964-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/895202ec9acf/nanomaterials-08-00964-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/b5bc1f365222/nanomaterials-08-00964-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/fa258ed687c4/nanomaterials-08-00964-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/aac4166ea2f5/nanomaterials-08-00964-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/89f917c9dce1/nanomaterials-08-00964-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/24792a428ee8/nanomaterials-08-00964-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/959668ec0816/nanomaterials-08-00964-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/907a1b61e63c/nanomaterials-08-00964-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/0410202d6726/nanomaterials-08-00964-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/b2c4bbb9d4ef/nanomaterials-08-00964-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/12023b73e4e5/nanomaterials-08-00964-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/4946ef345edd/nanomaterials-08-00964-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/8885cae21499/nanomaterials-08-00964-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/895202ec9acf/nanomaterials-08-00964-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/b5bc1f365222/nanomaterials-08-00964-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/fa258ed687c4/nanomaterials-08-00964-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/aac4166ea2f5/nanomaterials-08-00964-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/89f917c9dce1/nanomaterials-08-00964-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/24792a428ee8/nanomaterials-08-00964-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/959668ec0816/nanomaterials-08-00964-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/907a1b61e63c/nanomaterials-08-00964-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/748c/6316744/0410202d6726/nanomaterials-08-00964-g013.jpg

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