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(PDF) Comparison of different Poly vinyl chloride (PVC) /Calcium Carbonate …

The effects of micro and nanoscale calcium carbonate (CaCO 3) particles on the mechanical properties of polyvinyl chloride (PVC) were investigated. Type of (PVC S5070) were used as the matrix in this study, hydrocarb 95T CaCO 3 as a micro size

Effects of Montmorillonite on the Mineralization and Cementing Properties of Microbiologically Induced Calcium Carbonate

7/9/2017· Carbonate mineralization microbe is a microorganism capable of decomposing the substrate in the metabolic process to produce the carbonate, which then forms calcium carbonate with calcium ions. By taking advantage of this process, contaminative uranium tailings can transform to solid cement, where calcium carbonate plays the role of a binder. In this …

Elucidation of Calcite Structure of Calcium Carbonate Formation …

Elucidation of Calcite Structure of Calcium Carbonate Formation Based on Hydrated Cement Mixed with Graphene Oxide and Reduced Graphene Oxide Sarah Abduljabbar Yaseen,† Ghadah Abdaljabar Yiseen,‡ and Zongjin Li*, †Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, 999077 Kowloon, Hong

(PDF) Comparison of different Poly vinyl chloride (PVC) /Calcium Carbonate …

The effects of micro and nanoscale calcium carbonate (CaCO 3) particles on the mechanical properties of polyvinyl chloride (PVC) were investigated. Type of (PVC S5070) were used as the matrix in this study, hydrocarb 95T CaCO 3 as a micro size

Preparation of PMMA grafted calcium carbonate whiskers and its …

25/11/2015· The tensile strength increases from 44.0 MPa for PVC composite with unmodified whisker to 49.5 MPa for that with grafted whisker. The dynamic mechanical analysis (DMA) and TGA results indie that the composites reinforced by modified CaCO 3 whiskers have much higher modulus, glass transition temperature, and better thermal stability than their …

Preparation of PMMA grafted calcium carbonate whiskers and its …

25/11/2015· The tensile strength increases from 44.0 MPa for PVC composite with unmodified whisker to 49.5 MPa for that with grafted whisker. The dynamic mechanical analysis (DMA) and TGA results indie that the composites reinforced by modified CaCO 3 whiskers have much higher modulus, glass transition temperature, and better thermal stability than their …

XPS Study on the Stability and Transformation of Hydrate and Carbonate …

18/1/2017· MgO cements have great potential for carbon sequestration as they have the ability to carbonate and gain strength over time. The hydration of reactive MgO occurs at a similar rate as ordinary Portland cement (PC) and forms brucite (Mg(OH) 2, magnesium hydroxide), which reacts with CO 2 to form a range of hydrated magnesium carbonates (HMCs).

Effect of inorganic–organic surface modifiion of calcium sulfate whiskers on mechanical and thermal properties of calcium …

Effect of inorganic–organic surface modifiion of calcium sulfate whiskers on mechanical and thermal properties of calcium sulfate whisker/poly(vinyl chloride) composites Yunhua Lu a, Nan Jiang b, Xingwei Li a and Shiai Xu * ab a Key Laboratory for Ultrafine Materials of Ministry of Eduion, School of Materials Science and Engineering, East China University of Science …

Nanomaterials | Free Full-Text | Synchronously Strengthen and …

In order to overcome the challenge of synchronously strengthening and toughening polypropylene (PP) with a low-cost and environmental technology, CaCO3 (CC) nanoparticles are modified by tartaric acid (TA), a kind of food-grade complexing agent, and used as nanofillers for the first time. The evaluation of mechanical performance showed that, with 20 wt.% TA …

Structure and surface coverage of water-based stearate coatings …

1/10/2011· The experimental results from the DSC, XRD, XPS and IGC experiments, enables us to create a refined model for the structure of water-based stearin coatings on calcium carbonate nanoparticles. As shown in Fig. 6 a, we propose that in water the micelle mechanism of adsorption leads to the formation of a chemisorbed monolayer and to a physisorbed calcium …

A novel graphene-based micro/nano architecture with high strength and conductivity inspired by multiple creatures …

14/1/2021· Recently, a variety of artificial nacres were designed and prepared based on different 2D inorganic building blocks such as calcium carbonate (CaCO 3) …

Tribological Properties of a Lithium-Calcium Grease | SpringerLink

2/4/2015· Ultrabasic complex sulfonate greases are a new type of multipurpose lubricants with good compression strength and tribological properties. These products have been termed new generation greases [].Kobylyanskii et al. [] have found that colloidal calcium carbonate has calcite structure, which remains unchanged during the preparation of complex greases from …

Tribological and Antioxidation Synergistic Effect Study of Sulfonate-Modified Nano Calcium Carbonate

3/5/2013· According to the above XPS analysis results, discussion on the lubriion mechanism of the sulfonate-modified calcium carbonate nanoparticals as additives in 5 Cst are as followings. First, the calcium sulfonate was vertically adsorbed on steel ball surface according to “preferential orientation” adsorption mechanism [19] , which taking part in a competitive …

Surface modifiion of PCC with guar gum using organic titanium …

5/10/2016· Tensile strength is one of the most important mechanical properties of paper. The tensile index of MPCC-filled handsheets was 29.7 Nm/g, higher than that of PCC-filled handsheets (22.1 Nm/g). For comparison, the handsheets filled with 20% PCC and 0.75% GG was made, and the tensile index was measured.

Polypropylene - PP 40% Calcium Carbonate Filled

6/9/2001· Reduced tensile strength, modulus and HDT compared with 40% talc filled PP. Typical Properties Property Value Density (g/cm 3) 1.23 Surface Hardness RR90 Tensile Strength (MPa) 24 Flexural Modulus (GPa) 2.8 Notched Izod (kJ/m)

Tribological Properties of a Lithium-Calcium Grease | SpringerLink

2/4/2015· Ultrabasic complex sulfonate greases are a new type of multipurpose lubricants with good compression strength and tribological properties. These products have been termed new generation greases [].Kobylyanskii et al. [] have found that colloidal calcium carbonate has calcite structure, which remains unchanged during the preparation of complex greases from …

Quantitative analysis of accelerated carbonation products of the …

12/9/2014· Poorly crystalline Calcium silie hydrate (C–S–H) gel, formed by the hydration of the C 2 S and C 3 S phases, is one of the most primary constituents of hydrated cement (appropriately 2/3 of total volume of hydrated products []) and it has a dominant influence on the mechanical properties and durability properties of cement-based materials, such as strength, …

Mineralization Process of Biocemented Sand and Impact of Bacteria and Calcium Ions Concentrations on Crystal Morphology

12/10/2017· Al-Thawadi S. and R. Cord-Ruwisch, “Calcium carbonate crystals formation by ureolytic bacteria isolated from Australian soil and sludge,” Journal of Advanced Science and Engineering Research, vol. 2, no. 1, pp. 12–26, 2012. View at: Google Scholar

Calcium phosphate coating formed in infusion fluid mixture to enhance fixation strength of titanium screws …

5/5/2007· A novel technique was developed to coat a calcium phosphate (CaP) layer on titanium screws with a titanium oxide surface layer, using infusion fluids officially approved for clinical use. A calcium-containing solution, a phosphate-containing solution, and a sodium bicarbonate solution prepared from the infusion fluids were mixed at a Ca/P molar ratio of 2.0. Each screw …

Thermo Scientific XPS:

Interpretation of XPS Spectra. Aluminium oxide is an insulating material and the oxide position may vary with the thickness of the film. The relative intensities of the oxide and metallic s will also change with oxide thickness. This effect allows XPS to measure the thickness of Al oxide films. Splitting only observed for Al metal and

(PDF) Differentiation of Calcium Carbonate Polymorphs …

XPS parameters for Ca2p, C1s, and O1s core levels from the three calcium carbonate polymorphs. The values shown below are ''BE (FWHM)'' This …

Nanomaterials | Free Full-Text | Synchronously Strengthen and …

In order to overcome the challenge of synchronously strengthening and toughening polypropylene (PP) with a low-cost and environmental technology, CaCO3 (CC) nanoparticles are modified by tartaric acid (TA), a kind of food-grade complexing agent, and used as nanofillers for the first time. The evaluation of mechanical performance showed that, with 20 wt.% TA …

(PDF) Effect of Calcium Carbonate Replacement on Workability …

The surface analysis of polymorphic calcium carbonate (CaCO3) compounds, namely, calcite, aragonite, and vaterite were carried out by X-ray photoelectron spectroscopy (XPS).

Cooperative Ion-association Process Additives Influence the Phase Behavior of Amorphous Calcium Carbonate …

1 Additives Influence the Phase Behavior of Amorphous Calcium Carbonate by a Cooperative Ion-association Process Zhaoyong Zou,1 Iryna Polishchuk,2 Luca Bertinetti,1 Boaz Pokroy,2 Yael Politi,1 Peter Fratzl1 and Wouter J.E.M. Habraken1 1) Max Planck Institute of Colloids and Interfaces, Department of Biomaterials, Potsdam,

Calcium phosphate coating formed in infusion fluid mixture to enhance fixation strength of titanium screws …

5/5/2007· A novel technique was developed to coat a calcium phosphate (CaP) layer on titanium screws with a titanium oxide surface layer, using infusion fluids officially approved for clinical use. A calcium-containing solution, a phosphate-containing solution, and a sodium bicarbonate solution prepared from the infusion fluids were mixed at a Ca/P molar ratio of 2.0. Each screw …

Polypropylene - PP 40% Calcium Carbonate Filled

6/9/2001· Reduced tensile strength, modulus and HDT compared with 40% talc filled PP. Typical Properties Property Value Density (g/cm 3) 1.23 Surface Hardness RR90 Tensile Strength (MPa) 24 Flexural Modulus (GPa) 2.8 Notched Izod (kJ/m)

Thermo Scientific XPS:

Interpretation of XPS Spectra. Aluminium oxide is an insulating material and the oxide position may vary with the thickness of the film. The relative intensities of the oxide and metallic s will also change with oxide thickness. This effect allows XPS to measure the thickness of Al oxide films. Splitting only observed for Al metal and

The Effect of Aspartic Acid and Glycine on Amorphous Calcium Carbonate …

ACC through XPS and PDF analyses ACC was synthesized by mixing 20 ml of the calcium bearing solution into the carbonate solution (± ASP or GLY) followed by rapid separation of solid and solution using vacuum filtration. Immediately after filtration, the solid

Celitement® – A new sustainable hydraulic binder based on calcium …

Introduction Calcium silie hydrates (C-S-H) are the crucial “glue” in a wide variety of cement-based building materials. Ultimately, they are responsible for the strength development as well as for the resistance of dense concretes and mortars to attacking media. A

Polypropylene - PP 40% Calcium Carbonate Filled

6/9/2001· Reduced tensile strength, modulus and HDT compared with 40% talc filled PP. Typical Properties Property Value Density (g/cm 3) 1.23 Surface Hardness RR90 Tensile Strength (MPa) 24 Flexural Modulus (GPa) 2.8 Notched Izod (kJ/m)