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有机官能硅烷改性硅酸钠/聚氨酯复合材料力学性能显著提高的机理确认。

Mechanism confirmation of organofunctional silanes modified sodium silicate/polyurethane composites for remarkably enhanced mechanical properties.

机构信息

State Key Laboratory of Coal Mine Safety Technology, China Coal Technology & Engineering Group Shenyang Research Institute, Shenfu Demonstration Zone, 113122, China.

State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.

出版信息

Sci Rep. 2021 Apr 30;11(1):9407. doi: 10.1038/s41598-021-88893-2.

DOI:10.1038/s41598-021-88893-2
PMID:33931695
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8087689/
Abstract

Hybrid reinforced sodium silicate/polyurethane (SS/PU) composites mainly derived from low-cost SS and polyisocyanate are produced by a one-step method based on the addition of 3-chloropropyltrimethoxysilane (CTS). The wettability of SS on PU substrate surface is much improved as CTS content increases from 0.0 to 3.5 wt%. Furthermore, with 2.5 wt% of CTS optimal addition, the fracture surface morphology and elemental composition of the resulting SS/PU composites are characterized, as well as mechanical properties, chemical structure and thermal properties. The results indicate that the CTS forms multiple physical and chemical interactions with the SS/PU composites to induce an optimized organic-inorganic hybrid network structure thus achieving simultaneous improvement of compressive strength, flexural strength, flexural modulus and fracture toughness of the SS/PU composites, with the improvement of 12.9%, 6.6%, 17.5% and 9.7%, respectively. Moreover, a reasonable mechanism explanation for CTS modified SS/PU composites is confirmed. Additionally, the high interface areas of the organic-inorganic phase and the active crosslinking effect of the CTS are the main factors to determine the curing process of the SS/PU composites.

摘要

基于添加 3-氯丙基三甲氧基硅烷（CTS）的一步法，制备了主要由低成本硅酸钠（SS）和多异氰酸酯衍生的杂化增强型 SS/PU 复合材料。随着 CTS 含量从 0.0 增加到 3.5wt%，SS 在 PU 基底表面的润湿性得到显著提高。此外，当 CTS 添加量为 2.5wt%时，对所得 SS/PU 复合材料的断裂表面形貌和元素组成，以及力学性能、化学结构和热性能进行了表征。结果表明，CTS 与 SS/PU 复合材料形成了多种物理和化学相互作用，从而诱导优化的有机-无机杂化网络结构，实现了 SS/PU 复合材料抗压强度、弯曲强度、弯曲模量和断裂韧性的协同提高，分别提高了 12.9%、6.6%、17.5%和 9.7%。此外，还对 CTS 改性 SS/PU 复合材料的合理机制进行了确认。此外，有机-无机相的高界面面积和 CTS 的活性交联效应是决定 SS/PU 复合材料固化过程的主要因素。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/4c1f7842b82b/41598_2021_88893_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/cf9f02a6d82b/41598_2021_88893_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/d79123cee3df/41598_2021_88893_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/588d31761f2e/41598_2021_88893_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/6505d5ff890d/41598_2021_88893_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/02de4cf438d3/41598_2021_88893_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/8192ab79d046/41598_2021_88893_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/edcd00738e21/41598_2021_88893_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/7f5d47b38e0a/41598_2021_88893_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/4c1f7842b82b/41598_2021_88893_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/cf9f02a6d82b/41598_2021_88893_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/d79123cee3df/41598_2021_88893_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/588d31761f2e/41598_2021_88893_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/6505d5ff890d/41598_2021_88893_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/02de4cf438d3/41598_2021_88893_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/8192ab79d046/41598_2021_88893_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/edcd00738e21/41598_2021_88893_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/7f5d47b38e0a/41598_2021_88893_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8cbb/8087689/4c1f7842b82b/41598_2021_88893_Fig9_HTML.jpg

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