Study on microscopic mechanism of nano-silicon dioxide for improving mechanical properties of polypropylene

Wei, Shengkun; Xu, Li; Shen, Yin; Zhang, Liangyong; Wu, Xuelian

doi:10.1080/08927022.2020.1729981

Cited by 6 publications

(2 citation statements)

References 31 publications

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“…As a common nano reinforcing material for rubber, plastics and polyurethane, nano silica has the advantages of being light weight, non-toxic and tasteless, with stable chemical properties and high temperature resistance. Its molecular structure is a three-dimensional chain structure, and hydroxyl groups in different bonding states exist on the surface, which can significantly enhance the mechanical properties of the matrix material [20][21][22][23]. In recent years, there has been considerable research on the use of nano silica to strengthen polyurethane, but the polyurethane main chain contains more polar groups that are easy to hydrolyze, and its water resistance is poor.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Impact Resistant Polyurea Coating for Fluorochemical Pipeline

Zhou

Qin

et al. 2022

Processes

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A new type of high elastic polyurea protective coating reinforced by nano silica is prepared by filler composite in order to avoid both the leakage of fluorine chemical pipelines containing highly toxic and dangerous media as well as the damage to fluorine chemical pipelines under impact loads. The aim is to improve the intrinsic safety of fluorine chemical pipelines and ensure the safety of the ecological environment, life and property. The effects of different processes and process parameters on the properties of polyurea coating were studied. The polyurea coating was blended and strengthened with nano silica modified by silane coupling agent KH-550. The suitable stirring speed, material addition sequence and nano silica concentration of the new polyurea material were put forward to prepare a new polyurea coating with excellent properties. The properties of the polyurea coating were characterized, including curing time, tensile strength, elongation at break and impact resistance. Then, by using the numerical simulation method, the protection law of polyurea coating on fluorochemical pipelines with or without polyurea coating under the impact of small balls with different speeds was studied, and the equivalent stress mitigation and energy absorption mechanism of polyurea coating were analyzed from the perspective of macro and micro mechanisms. The results show that silane coupling agent KH-550 has successfully modified nano silica, and the optimal filling concentration of modified nano silica is 4 wt%. At this time, the tensile strength of filled reinforced polyurea coating is increased to 15.7 MPa, the elongation at break is 472%, the hardness is 61 HA, and the impact resistance of the matrix material is increased by 9.7 kJ/m2. This shows that the polyurea reinforced by nano silica has excellent mechanical properties and impact resistance. The simulation results show that the polyurea coating can slow down the impact caused by the equivalent stress of small balls at different speeds. When the ball speed is 5 m/s, the equivalent stress of polyurea coating slows down to 49.3%, and the percentage of reduction of the impact caused by the equivalent stress of the polyurea coating decreases gradually with the increase of ball impact speed.

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Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Impact Resistant Polyurea Coating for Fluorochemical Pipeline

Zhou

Qin

et al. 2022

Processes

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“…In recent years, there have been rapid growth predictions for polypropylenebased composites, due to their applications in many fields such as automotive, home appliances, and construction industries [1][2][3][4][5]. Since the last decade, several nanoparticles have been incorporated into polypropylene and other thermoplastics as reinforcements, to produce stronger and lighter polymer composites [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Thermal and Mechanical Properties of Polypropylene Polymer Nanocomposites Infused with Sonochemically Coated SiC/SiO₂ Nanoparticles

Rangari¹,

Davis²

2021

Composite Materials

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This chapter describes the coating of silicon carbide nanoparticles on different types of silicon dioxide that varied in size and shape using sonochemical method. These composite particles were further infused into polypropylene polymer to increase its thermal and mechanical properties for various applications. A two-step process was used to fabricate SiC/SiO2/polypropylene nanocomposites. In the first step, SiC nanoparticles were coated onto four different types of SiO2 nanoparticles. The coated nanoparticles were then characterized using a high resolution transmission electron microscope (TEM), X-ray diffraction (XRD) determined the morphology and crystalline structure, and X-ray photoelectron spectroscopy (XPS). These results showed that the nanoparticles were crystalline, spherical in shape, and were uniformly coated. In the second step, nanocomposite samples were extruded using a Wayne Yellow Label Top single screw extruder. The as prepared nanocomposite samples were then characterized for their thermal and mechanical properties. These properties show increase in their flexural strength and thermal degradation. These results show increase in mechanical properties. The importance of this work lies in the simple sonochemical synthesis of SiC/SiO2 hybrid nanomaterials and their filler applications in polypropylene polymer nanocomposites which are widely used for various application including automotive and electronic industries.

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Nanotechnology in paper and wood engineering: an introduction

Kumar

Nguyen

Sharma

et al. 2022

Nanotechnology in Paper and Wood Engineering

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Study on microscopic mechanism of nano-silicon dioxide for improving mechanical properties of polypropylene

Cited by 6 publications

References 31 publications

Preparation and Properties of Impact Resistant Polyurea Coating for Fluorochemical Pipeline

Preparation and Properties of Impact Resistant Polyurea Coating for Fluorochemical Pipeline

Thermal and Mechanical Properties of Polypropylene Polymer Nanocomposites Infused with Sonochemically Coated SiC/SiO₂ Nanoparticles

Nanotechnology in paper and wood engineering: an introduction

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Study on microscopic mechanism of nano-silicon dioxide for improving mechanical properties of polypropylene

Cited by 6 publications

References 31 publications

Preparation and Properties of Impact Resistant Polyurea Coating for Fluorochemical Pipeline

Preparation and Properties of Impact Resistant Polyurea Coating for Fluorochemical Pipeline

Thermal and Mechanical Properties of Polypropylene Polymer Nanocomposites Infused with Sonochemically Coated SiC/SiO2 Nanoparticles

Nanotechnology in paper and wood engineering: an introduction

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Thermal and Mechanical Properties of Polypropylene Polymer Nanocomposites Infused with Sonochemically Coated SiC/SiO₂ Nanoparticles