纳米二氧化硅原位增强亲水性聚氨酯注浆材料的制备与性能研究

李雅迪; 李嘉晋; 陈丁丁; 范仁祥; 桑国龙; 倪建明; 丁运生

doi:10.11779/CJGE2016S1015

纳米二氧化硅原位增强亲水性聚氨酯注浆材料的制备与性能研究 English Version

1. 合肥工业大学化工学院高分子材料与化工研究所,安徽合肥 230009;
2. 淮北矿业（集团）有限公司,安徽淮北 235000;
3. 先进功能材料与器件安徽省重点实验室,安徽合肥 230009

基金项目: 国家“863”计划项目（2015AA033903）; 安徽省重点攻关项目（1301021016）

详细信息

作者简介:
李雅迪(1989- ),女,硕士研究生,主要从事高分子材料合成与应用研究。E-mail: li-yadi@163.com。

通讯作者:
丁运生

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出版历程
- 收稿日期: 2015-11-29
- 发布日期: 2016-03-24

Properties of nanosilica-reinforced polyurethane by in-situ preparation and its application in polyurethane grouting

1. Institute of Polymer Materials and Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China;
2. Huaibei Mining ( Group)Co., Ltd., Huaibei 235000, China;
3. Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, China

摘要

摘要: 以异氰酸酯和高亲水性聚醚多元醇为原料,合成了亲水性聚氨酯预聚体浆液,并利用硅酸钠为硅源和预聚体反应,原位制备了纳米二氧化硅增强亲水性聚氨酯注浆材料固结体。应用FTIR-ATR、XRD和TEM对固结体的结构与性能进行了测试与表征,探讨了原位生成的纳米二氧化硅对亲水性聚氨酯注浆材料固结体性能的影响。结果表明,原位生成的纳米二氧化硅均匀的分散在聚氨酯中,并与聚氨酯网络以化学键方式结合,提高了固结体的力学性能。经过井下堵水中试工程试验以及后续的观察,纳米二氧化硅增强聚氨酯复合材料具有较高的实际堵水效率。
- 硅酸钠 /
- 纳米二氧化硅 /
- 聚氨酯注浆 /
- 压缩强度 /
- 堵水性能
Abstract: The prepolymer of hydrophilic polyurethane is synthesized by diisocyanate and polyether polyol, and then the polyurethane prepolymer blends with sodium silicate solution to prepare nanosilica-reinforced hydrophilic polyurethane composites (HPU/nano-SiO₂) via in-situ reactions. The FTIR-ATR and X-ray diffraction (XRD) are employed to confirm the existence of the nano-SiO₂ and its chemical bond to HPU chain, and the size and dispersion of nano-SiO₂ in HPU matrix are investigated by transmission electron microscopy (TEM). The gel time of the mixture consisting of HPU prepolymer and sodium silicate solutions and the mechanical properties of HPU/nano-SiO₂composites are also tested. The results show that the particles of nano-SiO₂disperse homogeneously in the HPU matrix, and the nano-SiO₂combines with HPU chains by chemical bonds to form HPU/nano-SiO₂composites. What’s more, the gel time of HPU and sodium silicate solution blend increases compared to that of the blend of HPU and water, and the compression strength of HPU/nano-SiO₂ is improved effectively than that of pristine HPU, so the HPU prepolymer can react with sodium silicate solutions to produce the nanosilica reinforced hydrophilic polyurethane grout, which has high ability and efficiency to form adequate plugs for underground water though the plugging project of coal mine.
- sodium silicate /
- nanosilica /
- polyurethane grouting /
- compression strength /
- water plugging performance

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参考文献(5)

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