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- 2017
三种形貌纳米SiO2的调控合成及其原位增强亲水性聚氨酯注浆复合材料
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Abstract:
以硅酸钠为硅源，通过对硅酸钠水解形成纳米SiO2（nano SiO2）的过程进行调控，得到含无定形nano SiO2（nano A-SiO2）、球状nano SiO2（nano S-SiO2）和层状六角形nano SiO2（nano LH-SiO2）的水溶胶。以异氰酸酯和高亲水性聚醚多元醇为原料，合成亲水性聚氨酯（HPU）预聚体，并实现其与硅溶胶的原位反应，制备nano SiO2/HPU注浆复合材料。通过ATR-FTIR、TEM、SEM及力学性能测试，对nano SiO2/HPU的结构和性能进行表征与测试。结果表明，成功实现了聚乙二醇（PEG）对硅酸钠水解生成nano SiO2过程的调控，并且不同形态结构的nano SiO2粒子对nano SiO2/HPU注浆复合材料的力学性能影响不同。其中，nano S-SiO2/HPU具有更高的压缩强度，nano LH-SiO2/HPU具有更强的韧性。 Three kinds of SiO2 sols containing amorphous nano-silica (nano A-SiO2), spherical nano-silica (nano S-SiO2), and layered hexagonal nano-silica (nano LH-SiO2) particles were controllably synthesized by tailoring the hydrolysis of sodium silicate. By in-situ reaction between SiO2 sols and hydrophilic polyurethane (HPU) prepolymer, synthesizing from diisocyanate and polyether polyol, a series of nano-silica modified hydrophilic polyurethane composites (nano SiO2/HPU) were obtained. The structure and properties of HPU and nano SiO2/HPU were characterized by ATR-FTIR, TEM, SEM and mechanical properties. The results show that PEG plays a regulating role in the formation of nano-silica particles in SiO2 sol, and the morphology of nano-silica particles affects the mechanical properties of nano SiO2/HPU grouting composites differently. Specifically, nano S-SiO2/HPU exhibits higher compression strength, and nano LH-SiO2/HPU possesses better toughness. 国家863计划项目（2015AA033903）；安徽省重点攻关项目（1301021016）
| [1] | JOYCE J T. Polyurethane grouts used to stop water leakage through cracks and joints[J]. Concrete Construction, 1992:551-555. |
| [2] | CHEN D H, WON M, HONG F. Investigation of settlement of a jointed concrete pavement[J]. Journal of Performance of Constructed Facilities, 2009, 23(6):440-446. |
| [3] | NAUDTS A. Irreversible changes in the grouting industry caused by polyurethane grouting:An overview of 30 years of polyurethane grouting[C]. American Society of Civil Engineers, 2003:1266-1280. |
| [4] | LAI X J, LI X R, WANG L. Synthesis and properties of waterborne polyurethanes modified by epoxy resin[J]. Acta Polymerica Sinica, 2009(11):1107-1112. |
| [5] | LEE Y H, KIM E J, KIM H D. Synthesis and poperties of waterborne poly(urethane urea)s containing polydi-methylsiloxane[J]. Journal of Applied Polymer Science, 2011, 120(1):212-219. |
| [6] | PARK D H, OH J K, KIM S B, et al. Synthesis and characterization of sulfonated polyol-based waterborne polyurethane-polyacrylate hybrid emulsions[J]. Macromolecular Research, 2013, 21(11):1247-1253. |
| [7] | ORGILES-CALPENA E, ARAN-AIS F, TORRO-PALAU A M, et al. Effect of amount of functionalised carbon nanofibres in polyurethane dispersions[J]. Progress in Rubber Plastics and Recycling Technology, 2012, 28(3):127-145. |
| [8] | 陈洋, 曹婉鑫, 唐瑶纳, 等. 纳米二氧化硅改性水性聚氨酯的研究进展[J]. 西部皮革, 2014, 36(23):28-32. CHEN Y, CAO W X, TANG Y N, et al. Research progress in nano-SiO2 modified waterborne polyurethane[J]. West Leather, 2014, 36(23):28-32 (in Chinese). |
| [9] | ZHAI L L, WANG Y, PENG F, et al. Synthesis of TiO2-SiO2/waterborne polyurethane hybrid with amino-siloxane terminated via a sol-gel process[J]. Materials Letters, 2012(89):81-85. |
| [10] | 杨文龙, 杨建军, 张建安, 等. 水性聚氨酯为表面活性剂的SiO2-聚甲基丙烯酸甲酯复合微球的细乳液法制备[J]. 复合材料学报, 2013, 30(1):112-118. YANG W L, YANG J J, ZHANG J A, et al. Miniemulsion polymerization of SiO2-p(methyl methacrylate) composite microsphere with waterborne polyurethane used as the surfactant[J]. Acta Materiae Compositae Sinica, 2013, 30(1):112-118 (in Chinese). |
| [11] | SETYAWAN H, YUWANA M, BALGIS R. PEG-temp-lated mesoporous silicas using silicate precursor and their applications in desiccant dehumidification cooling systems[J]. Microporous and Mesoporous Materials, 2015, 218:95-100. |
| [12] | TAN J H, WANG X P, TAI J J, et al. Novel blends of acrylonitrile butadiene rubber and polyurethane-silica hybrid networks[J]. Express Polymer Letters, 2012, 6(7):588-600. |
| [13] | DOLATZADEH F, MORADIAN S, JALILI M M. Influence of various surface treated silica nanoparticles on the electrochemical properties of SiO2/polyurethane nanocoatings[J]. Corrosion Science, 2011, 53(12):4248-4257. |
| [14] | 朱锦, 李雅迪, 孙晓红, 等. 以 TDI 为扩链剂合成亲水性聚氨酯注浆堵水材料研究[J]. 中国建筑防水, 2014(12):23-26. ZHU J, LI Y D, SUN X H, et al. Study on synthesis of hydrophilic polyurethane grouting and water-blocking material with TDI as chain extender[J]. China Building Waterproofing, 2014(12):23-26 (in Chinese). |
| [15] | 全国塑料制品标准化技术委员会. 硬质泡沫塑料压缩性能的测定:GB/T 8813-2008[S]. 北京:中国标准出版社, 2008. China National Technical Committee of Standardization for Plastic Products. Rigid cellular plastics-determination of compression properties:GB/T 8813-2008[S]. Beijing:Standards Press of China, 2008 (in Chinese). |
| [16] | DING J, YE L. Structure and property of polyurethane/SiO2 composite elastomer prepared via in situ polymerization[J]. Journal of Applied Polymer Science, 2013, 127(4):2732-2738. |
| [17] | JEON H T, JANG M K, KIM B K, et al. Synthesis and characterizations of waterborne polyurethane-silica hybrids using sol-gel process[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2007, 302(1-3):559-567. |
| [18] | GAO X Y, ZHU Y C, ZHAO X, et al. Synthesis and chara-cterization of polyurethane/SiO2 nano composites[J]. Applied Surface Science, 2011, 257(10):4719-4724. |
| [19] | NOREEN A, ZIA K M, ZUBER M, et al. Recent trends in environmentally friendly water-borne polyurethane coatings:A review[J]. Korean Journal of Chemical Engineering, 2016, 33(2):388-400. |
| [20] | 葛震, 周闪闪, 罗运军. 纳米SiO2/有机硅改性水性聚氨酯复合材料的制备及性能[J]. 复合材料学报, 2014, 31(4):909-915. GE Z, ZHOU S S, LUO YJ. Preparation and properties of nano-SiO2/organosilicon modified waterborne polyurethane composites[J]. Acta Materiae Compositae Sinica, 2014, 31(4):909-915 (in Chinese). |
