Mechanical Properties and Microstructure of PVA Fiber Reinforced Cemented Soil

Yao, Xin; Geng, Haoran; Wang, Mingming; Dong, Xiaoqiang

doi:10.1007/s12205-020-0998-x

Cited by 31 publications

(10 citation statements)

References 33 publications

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“…Polyvinyl alcohol (PVA) fibers have been widely used as reinforcing materials in civil and architectural engineering, due to their excellent mechanical properties and strong interaction with the cement matrix. [1][2][3][4] However, the hydroxyl group in each unit of PVA molecule was easy to form intramolecular or intermolecular hydrogen bonds, which were beneficial for gas barrier property, [5][6][7] but they were also a limitation for drawability during spinning process. Intramolecular hydrogen bonds lead to the curling of PVA molecular chains and limited the further improvement of the drawing ratio and mechanical properties of PVA fiber.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of high strength and high modulusPVAfiber via dry‐wet spinning with cross‐linking of boric acid

Xin

Zou

et al. 2021

J of Applied Polymer Sci

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To improve the mechanical properties of polyvinyl alcohol (PVA) fibers, a series of PVA fibers were prepared via dry-wet spinning with cross-linking of boric acid (BA) (PVA/BA fibers), and using the mixed solvent of dimethyl sulfoxide and water. Moreover, the final PVA/BA fibers were characterized by Fourier transform infrared spectra (FTIR), scanning electron microscopy (SEM), differential scanning calorimetery (DSC), thermogravimetric analyzer (TGA), powder X-ray diffraction (XRD) and yarn strength tester. Furthermore, with the increasing of BA content, FTIR analysis showed that the degree of crosslinking of BA with PVA increased. SEM images of final PVA/BA fibers presented smooth surfaces, and the diameters decreased firstly and then increased. DSC, TGA, and XRD analysis indicated that the melting temperatures, thermal properties and crystallinities first increased and then decreased with the increasing of BA content. In addition, mechanical properties measurements illustrated that the cross-linking existed at an optimal BA content of 0.3 wt%, and PVA/BA-0.3 fiber had the highest tensile strength and Young's modulus of 13.1 ± 0.4 and 360.2 ± 10.4 cN/dtex, respectively.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of high strength and high modulusPVAfiber via dry‐wet spinning with cross‐linking of boric acid

Xin

Zou

et al. 2021

J of Applied Polymer Sci

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“…As a water soluble, biodegradable crystal-amorphous polymer, PVA is widely used as an additive to improve mechanical properties of blends. [35,36] As shown in Figure 1b, PVA was added to the system to change the original crystalline structure of chitosan and increase the boundary between the crystal region from the added PVA and the amorphous region from the chitosan in the blend to enhance interfacial polarization. [32] Because it contains a large number of amino and hydroxyl groups, the structure of chitosan itself is easy to generate a large number of hydrogen bonds, [37] which limits the reorientation space of polarized groups, thus affecting mobility of polarized groups.…”

Section: Resultsmentioning

confidence: 99%

“…As a water soluble, biodegradable crystal‐amorphous polymer, PVA is widely used as an additive to improve mechanical properties of blends. [ 35,36 ]…”

Section: Resultsmentioning

confidence: 99%

Highly Enhanced Triboelectric Performance from Increased Dielectric Constant Induced by Ionic and Interfacial Polarization for Chitosan Based Multi‐Modal Sensing System

Sun

Choi

Cha

et al. 2021

Adv Funct Materials

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The coexistence of increasingly severe environmental concerns and bio-signal sensing systems drives the development of environmental affinity and energy harvesting materials. Chitosan is a richly sourced biodegradable material derived from crustaceans, which provides a new option for environmentally, wearable triboelectric nanogenerator (TENG). In this paper, the triboelectric performance of chitosan blends are proposed to enhance the dielectric constant by optimizing the ionic polarization and interface polarization for the first time, which fills in the blank of enhancing the output of chitosan triboelectric by systematically engineering in ionic/molecular and pH effect. Triboelectric output enhanced chitosan film in TENG shows an output voltage 3 times (18 V) higher than that of the initial film and 25 times (200 V) higher after corona charge injection. The chitosan film for wearable devices not only can be used as a unit of a triboelectric device to measure human motion signal, but also can be used as a piezoresistive sensor (ΔR/R 0 : 0 to 1.5) and an air humidity sensor (relative humidity: 20% to 90%) after mixing carbon black. The study provides a stimulating example that triboelectric nano generator/piezoresistive sensor is made from chitosan and used in the multi-modal sensing system.

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“…Chemical techniques are being used for expansive soil reinforcement and stabilization through application of fly ash [ 52 ], lime [ 53 ], geo-polymers [ 54 ], cement [ 55 ], and ground granulated blast furnace slag [ 56 ]. Furthermore, mechanical techniques have been proposed as a more sustainable solution for expansive soil reinforcement based on randomly distributed synthetic fibers such as polypropylene (PP) [ 57 ], polyester [ 58 ], polyvinyl alcohol (PVA) [ 59 ], waste carpet [ 60 ], glass [ 61 ], and carbon [ 62 ]), as well as natural (biobased) fibers such as kenaf [ 63 ], corn husk [ 64 ], hemp [ 65 ], bagasse [ 66 ], sisal [ 67 ], and jute [ 68 ].…”

Section: Soil Compositementioning

confidence: 99%

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

Fazli

Rodrigue

2022

Polymers

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Waste tire textile fibers (WTTF), as a by-product (10–15% by weight of tires) of end-of-life tires (ELT) mechanical recycling (grinding), are classified as hazardous wastes and traditionally burnt (thermal recycling) or buried (landfilling), leading to several environmental and ecological issues. Thus, WTTF still represent an important challenge in today’s material recycling streams. It is vital to provide practical and economical solutions to convert WTTF into a source of inexpensive and valuable raw materials. In recent years, tire textile fibers have attracted significant attention to be used as a promising substitute to the commonly used natural/synthetic reinforcement fibers in geotechnical engineering applications, construction/civil structures, insulation materials, and polymer composites. However, the results available in the literature are limited, and practical aspects such as fiber contamination (~65% rubber particles) remain unsolved, limiting WTTF as an inexpensive reinforcement. This study provides a comprehensive review on WTTF treatments to separate rubber and impurities and discusses potential applications in expansive soils, cement and concrete, asphalt mixtures, rubber aerogels and polymer composites.

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Mechanical Properties and Microstructure of PVA Fiber Reinforced Cemented Soil

Cited by 31 publications

References 33 publications

Preparation and characterization of high strength and high modulusPVAfiber via dry‐wet spinning with cross‐linking of boric acid

Preparation and characterization of high strength and high modulusPVAfiber via dry‐wet spinning with cross‐linking of boric acid

Highly Enhanced Triboelectric Performance from Increased Dielectric Constant Induced by Ionic and Interfacial Polarization for Chitosan Based Multi‐Modal Sensing System

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

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