Effect of silane treatment on the mechanical properties of polyurethane/water glass grouting materials

Wang, Xinmeng; Li, Qifeng; Wang, Junwei; Ning, Yin; Jiang, Shuai; Kang, Maoqing

doi:10.1016/j.conbuildmat.2016.04.112

Cited by 60 publications

(26 citation statements)

References 36 publications

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“…These silanol groups can undergo further condensation reactions with other silanol groups to form siloxane linkages, or form hydrogen bonds with other polar groups (–OH, –NH 2 , –SH, –C=O). This means that adding even a small amount of silane to the PC solution led to improved properties via the formation of hydrogen bonds with the urea functional groups of PU to cross-link the polymer chains [ 21 , 22 , 23 , 24 ].…”

Section: Resultsmentioning

confidence: 99%

Superhydrophobic, Elastic, and Conducting Polyurethane-Carbon Nanotube–Silane–Aerogel Composite Microfiber

et al. 2020

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Flexible fibers composed of a conductive material mixed with a polymer matrix are useful in wearable electronic devices. However, the presence of the conductive material often reduces the flexibility of the fiber, while the conductivity may be affected by environmental factors such as water and moisture. To address these issues, we developed a new conductive fiber by mixing carbon nanotubes (CNT) with a polyurethane (PU) matrix. A silane ((heptadecafluoro–1,1,2,2–tetra–hydrodecyl)trichlorosilane) was added to improve the strain value of the fiber from 155% to 228%. Moreover, silica aerogel particles were embedded on the fiber surface to increase the water contact angle (WCA) and minimize the effect of water on the conductivity of the fiber. As a result, the fabricated PU-CNT-silane-aerogel composite microfiber maintained a WCA of ~140° even after heating at 250 °C for 30 min. We expect this method of incorporating silane and aerogel to help the development of conductive fibers with high flexibility that are capable of stable operation in wet or humid environments.

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Section: Resultsmentioning

confidence: 99%

Superhydrophobic, Elastic, and Conducting Polyurethane-Carbon Nanotube–Silane–Aerogel Composite Microfiber

et al. 2020

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“…Research and development of chemical grouting materials. He et al [1] studied the influence of a silane coupling agent, 3-chloropropyl trimethoxysilane, on the mechanical properties of material in terms of their effect on the properties of slurry injection. Few studies were done on the flow pattern of alkali-resistant glass fiber grout, whereas the compressive strength, tensile strength, flexural strength, and impermeability of alkali-resistant glass fiber grouting materials were not studied.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Cement Alkali-Resistant Glass Fiber (C-ARGF) Grouting Material

Shi

Wang

Xu³

2020

Materials

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Mixing alkali-resistant glass fiber (ARGF) into grouting slurry can prevent the development of cracks; thus, understanding the properties of ARGF grouting material is important for applications in engineering. Two types of ARGFs (Cem-FIL®60 and Anti-Crak®HD) were selected as mixing materials, and their performance was tested in four areas, namely, compressive strength, tensile strength, flexural strength, and impervious performance, under four different mixing amounts of fiber (0%, 0.25%, 0.5%, and 1.0%). Results demonstrate that the addition of ARGF increased the compressive strength and tensile strength of the grouting slurry, and the best performance was at 0.5%. The effect on the flexural strength and impervious performance was related to the mixing amount, and the fiber may have induced a counter-effect for certain amounts of added ARGF. Mixing ARGF could increase the early strength ratio of grout; however, a high early strength ratio did not necessarily result in high strength, as the flexural strength did not change synchronously with the early strength ratio; a similar pattern was found for the impermeability. Cem-FIL®60 had a better effect on the properties of grouting materials than Anti-Crak®HD. These results were successfully applied in the water-plugging and reinforcement engineering of a karst tunnel.

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“…The thermodynamic incompatibility between the hard and soft segments results in phase separation at microscale level, which is directly responsible for a variety of unique properties of PU materials . For example, PU elastomers possess distinguished elasticity, toughness, and the resistance to abrasion, thereby playing an increasingly important role in the fields of structural and wear‐resistant materials However, pure PU elastomers have usually a low stiffness and poor heat‐resistance, which severely limit their advanced applications …”

Section: Introductionmentioning

confidence: 99%

Effect of carbon fiber‐graphene oxide multiscale reinforcements on the thermo‐mechanical properties of polyurethane elastomer

Jiang

Wang

et al. 2018

Polymer Composites

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Thermo‐mechanical properties are often the bottleneck for advanced applications of polyurethane (PU) elastomer materials. Carbon materials are emerging as promising reinforcing fillers for polymers due to their superior mechanical and conductive properties. In this study, carbon fiber‐graphene oxide (CF‐GO) multiscale reinforcements are fabricated for improving thermal‐mechanical properties of PU elastomers. To this end, CFs are firstly modified with GO via electrophoretic deposition and subsequently cooperate with free‐dispersed GO sheets in PU matrix. This multiscale reinforcing strategy effectively improved thermo‐mechanical properties and thermal stability of PU elastomer due to the improved CF‐PU interfacial interaction as well as the local stiffening of fiber‐matrix interphase by the dispersed GO sheets. This reinforcing approach also led to a synergistic increase in the thermal diffusivity of PU elastomer due to the formation of interconnected conductive network, in which CFs serve as a conductive framework that connects the free‐dispersed GO sheets. POLYM. COMPOS., 40:E953–E961, 2019. © 2018 Society of Plastics Engineers

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Effect of silane treatment on the mechanical properties of polyurethane/water glass grouting materials

Cited by 60 publications

References 36 publications

Superhydrophobic, Elastic, and Conducting Polyurethane-Carbon Nanotube–Silane–Aerogel Composite Microfiber

Superhydrophobic, Elastic, and Conducting Polyurethane-Carbon Nanotube–Silane–Aerogel Composite Microfiber

Experimental Study of Cement Alkali-Resistant Glass Fiber (C-ARGF) Grouting Material

Effect of carbon fiber‐graphene oxide multiscale reinforcements on the thermo‐mechanical properties of polyurethane elastomer

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