Abstract
Phosphogypsum (PG) is one of solid wastes with large amount of yield and serious pollution, which has attracted wide attention. The aim of this study is to investigate filling performance of PG on polypropylene (PP) or high-density polyethylene (HDPE) matrix. In this work, PG was calcined initially to improve whiteness and fix impurities. X-ray diffraction (XRD) results showed that after calcined at 500 °C, the PG phase changed from CaSO4·2H2O to CaSO4. The modification effects of the three modifiers were evaluated by Fourier transform infrared spectra (FTIR), oil absorption value, water floatability, and contact angle analysis. The effects of weight fraction of PG in PP and HDPE matrix on mechanics and morphology were observed by tensile test, impact test, and scanning electron microscope. Scanning electron microscope (SEM) showed that modified PG can be dispersed uniformly in the matrix at low filling content. With the increase of PG filling content, the analysis of mechanical properties showed that the tensile strength of HDPE matrix increased, while the tensile strength of PP matrix decreased gradually. The impact strength of HDPE matrix would decrease, but the impact strength of PP matrix increased first and then decreased. Compared with calcium carbonate (CC), the mechanical properties of HDPE filled with PG performed better. The apparent density showed that polymer composites filled with PG have the characteristics of light weight.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Financial support was provided by Engineering Research Center of Non-metallic Minerals of Zhejiang Province (ZD2020K01) and Technology Program of ZJUT (KYY-HX-20200382).
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Min Sun: experiment, writing original draft. Qing Sun: conceptualization, data curation, revising, funding acquisition. Jian Zhang: resources. Jiawei Sheng: project administration, review and editing, funding.
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Sun, M., Sun, Q., Zhang, J. et al. Surface modification of phosphogypsum and application in polyolefin composites. Environ Sci Pollut Res 29, 66177–66190 (2022). https://doi.org/10.1007/s11356-022-20414-8
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DOI: https://doi.org/10.1007/s11356-022-20414-8