Curing comparison and performance investigation of polyurethane concrete with retarders

Li, Li; Yu, Tianlai

doi:10.1016/j.conbuildmat.2022.126883

Cited by 21 publications

(5 citation statements)

References 31 publications

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“…Similar results for setting time were reported by Hong et al [ 28 ]. However, Li and Yu [ 29 ] reported a slightly longer initial setting time of 40 min and a final setting time of 70 min for PU-cement concrete.…”

Section: Resultsmentioning

confidence: 99%

“…The short setting time causes difficulty handling PU concrete in construction. Li and Yu [ 29 ] investigated the effect of using castor oil and phosphate ester as retarders on setting time and durability of PU concrete incorporating cement. Results showed that 1% of phosphate ester increased the setting time by 2 h. Moreover, the PU concrete showed better frost, wear, bending fatigue, and UV aging resistance than cement concrete [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

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Development and Characterization of a Sustainable Bio-Polymer Concrete with a Low Carbon Footprint

et al. 2023

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Polymer concrete (PC) has been used to replace cement concrete when harsh service conditions exist. Polymers have a high carbon footprint when considering their life cycle analysis, and with increased climate change concerns and the need to reduce greenhouse gas emission, bio-based polymers could be used as a sustainable alternative binder to produce PC. This paper examines the development and characterization of a novel bio-polymer concrete (BPC) using bio-based polyurethane used as the binder in lieu of cement, modified with benzoic acid and carboxyl-functionalized multi-walled carbon nanotubes (MWCNTs). The mechanical performance, durability, microstructure, and chemical properties of BPC are investigated. Moreover, the effect of the addition of benzoic acid and MWCNTs on the properties of BPC is studied. The new BPC shows relatively low density, appreciable compressive strength between 20–30 MPa, good tensile strength of 4 MPa, and excellent durability resistance against aggressive environments. The new BPC has a low carbon footprint, 50% lower than ordinary Portland cement concrete, and can provide a sustainable concrete alternative in infrastructural applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development and Characterization of a Sustainable Bio-Polymer Concrete with a Low Carbon Footprint

et al. 2023

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“…There is an increasing interest in using metal oxide nanoparticles to replace metal nanoparticles for synthesizing polymer-matrix metal oxide nanocomposites [ 240 , 241 , 242 , 243 ]. Metal oxide nanoparticles, especially zinc oxide nanoparticles, are more desirable than metal nanoparticles as nanofillers in forming polymer-matrix nanocomposites [ 244 , 245 , 246 , 247 ]. Zinc oxide nanoparticles feature new UV-absorption and photosensitizer characteristics, with higher biocompatibilities and lower toxicities than metal nanoparticles [ 218 , 248 ].…”

Section: Nanocomposite/nanohybrid Antibacterial Materialsmentioning

confidence: 99%

Recent Advances in the Development of Lipid-, Metal-, Carbon-, and Polymer-Based Nanomaterials for Antibacterial Applications

Ren

Lim

et al. 2022

Nanomaterials

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Infections caused by multidrug-resistant (MDR) bacteria are becoming a serious threat to public health worldwide. With an ever-reducing pipeline of last-resort drugs further complicating the current dire situation arising due to antibiotic resistance, there has never been a greater urgency to attempt to discover potential new antibiotics. The use of nanotechnology, encompassing a broad range of organic and inorganic nanomaterials, offers promising solutions. Organic nanomaterials, including lipid-, polymer-, and carbon-based nanomaterials, have inherent antibacterial activity or can act as nanocarriers in delivering antibacterial agents. Nanocarriers, owing to the protection and enhanced bioavailability of the encapsulated drugs, have the ability to enable an increased concentration of a drug to be delivered to an infected site and reduce the associated toxicity elsewhere. On the other hand, inorganic metal-based nanomaterials exhibit multivalent antibacterial mechanisms that combat MDR bacteria effectively and reduce the occurrence of bacterial resistance. These nanomaterials have great potential for the prevention and treatment of MDR bacterial infection. Recent advances in the field of nanotechnology are enabling researchers to utilize nanomaterial building blocks in intriguing ways to create multi-functional nanocomposite materials. These nanocomposite materials, formed by lipid-, polymer-, carbon-, and metal-based nanomaterial building blocks, have opened a new avenue for researchers due to the unprecedented physiochemical properties and enhanced antibacterial activities being observed when compared to their mono-constituent parts. This review covers the latest advances of nanotechnologies used in the design and development of nano- and nanocomposite materials to fight MDR bacteria with different purposes. Our aim is to discuss and summarize these recently established nanomaterials and the respective nanocomposites, their current application, and challenges for use in applications treating MDR bacteria. In addition, we discuss the prospects for antimicrobial nanomaterials and look forward to further develop these materials, emphasizing their potential for clinical translation.

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“…Polyurethane (PU) is a versatile polymer material with molecular adaptability, biocompatibility, [1][2][3][4] and mechanical properties, [5][6][7][8] which is widely used in the fields of coatings, adhesives, medical devices, construction materials, and packaging materials. [9][10][11][12] In daily use, microorganisms cause decomposition, aging, and decay of industrial materials, pharmaceuticals, buildings, and medical devices. [13,14] However, PU materials are also vulnerable to microorganisms in the process of use because the polyether DOI: 10.1002/macp.202200141 or polyester chain segments in PU macromolecules can become carbon sources for microbial growth, which greatly limits their application.…”

Section: Introductionmentioning

confidence: 99%

NIR‐Responsive Polyurethane Nanocomposites Based on PDA@FA Nanoparticles with Synergistic Antibacterial Effect

Zou

Yan

Wang

et al. 2022

Macro Chemistry & Physics

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At present, high‐performance antibacterial polymer materials have attracted widespread attention, possessing huge application prospects in the fields of medical and biological science, and packaging. In this work, polydopamine nanoparticles (PDA NPs) with photothermal ability and active sites are designed to adsorb fusidic acid (FA) molecules with targeted antibacterial capability; then, polydopamine@fusidic acid (PDA@FA) is introduced into the polyurethane (PU) to obtain multifunctional and antibacterial PU materials (PUDA@FA). The structures and morphologies of PDA NPs and PDA@FA are successfully characterized by Fourier transform‐infrared spectroscopy and scanning electron microscopy. With the introduction of PDA@FA, the nano‐sized reinforcement not only greatly improves the mechanical properties (tensile strength 19.31 MPa and toughness 10.6 MJ m−3) of PU film but also due to the photothermal effect of PDA NPs and the antibacterial of FA, the scavenging activities of DPPH and ABTS reach 70–85% and 55–70%, respectively. The antibacterial rate of Staphylococcus aureus reaches more than 99.9% and presents long‐term antibacterial ability. In this way, this work provides new guidance for the preparation of high‐performance PU materials with both antibacterial and anti‐oxidation properties, broadening the application scope of antibacterial materials.

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Curing comparison and performance investigation of polyurethane concrete with retarders

Cited by 21 publications

References 31 publications

Development and Characterization of a Sustainable Bio-Polymer Concrete with a Low Carbon Footprint

Development and Characterization of a Sustainable Bio-Polymer Concrete with a Low Carbon Footprint

Recent Advances in the Development of Lipid-, Metal-, Carbon-, and Polymer-Based Nanomaterials for Antibacterial Applications

NIR‐Responsive Polyurethane Nanocomposites Based on PDA@FA Nanoparticles with Synergistic Antibacterial Effect

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