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- W4385575908 abstract "Abstract CaCl 2 solution and Ca(OH) 2 slurry, both prepared from marble waste (MARWAS), were carbonated with CO 2 gas in the presence of CTAB, SDS, Teepol-610s, Triton-X, and Tween-80 as the surface modifiers in a semi-batch foam-bed reactor (FBR) to synthesize ultrafine or submicron PCC particles with enhanced hydrophobicity. Nano/ultrafine PPC particles with and without surfactant were also synthesized in a semi-batch stirrer reactor (SR) using CaCl 2 solutions made from MARWAS and NH 4 HCO 3 as the carbonating agent by single or simultaneous application of ultrasonication (US) and surfactant, respectively. The products were characterized by SEM, TEM, XRD, FTIR, and drop shape analyzer. In the presence of SDS in the FBR, distinct and smaller hydrophobic (water contact angle of 103.3 o ) vaterite particles (426 nm) could be produced using CaCl 2 solution than those with the Ca(OH) 2 slurry. However, in the SR, methanol was found to be more effective than the aqueous solvent in synthesizing needle-like aragonite nanoparticles (215.6 nm with L/D = 8.55) from CaCl 2 solution without any use of US or surfactant. Handmade papers were manufactured using ground MARWAS powder, modified and unmodified PCC. The physical, mechanical, and optical properties of these filler-loaded papers were determined. The use of surface-modified and unmodified PCC was superior to the commercial PCC in increasing filler retention, burst strength, tear strength, brightness, and opacity of the paper hand sheets. Even the direct use of MARWAS powder was found to be more effective than GCC in enhancing the optical properties, although a slight decrease in the mechanical strength was observed." @default.
- W4385575908 created "2023-08-05" @default.
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- W4385575908 date "2023-08-04" @default.
- W4385575908 modified "2023-09-27" @default.
- W4385575908 title "Synthesis and characterization of PCC from marble waste for its application in papermaking" @default.
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- W4385575908 doi "https://doi.org/10.21203/rs.3.rs-3220760/v1" @default.
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