Mechanical behavior of calcium sulfate whisker-reinforced paraffin/gypsum composites

Ma, Fentian; Chen, Chang; Wang, Yubin

doi:10.1016/j.conbuildmat.2021.124795

Cited by 33 publications

(13 citation statements)

References 40 publications

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“…By environmental protection, low cost, high strength, high modulus, and high toughness, calcium sulfate whiskers (CSW) have strong market competitiveness, [22][23][24] Calcium sulfate whiskers have large mechanical strength, so they can optimize their performance as an enhanced component in synthetic materials. [25][26][27] Because of the small size and large strength of calcium sulfate whisker can play a skeleton role when added to polymer materials, and the mechanical properties of CSW often significantly improve. [28][29][30] At the same time, calcium sulfate whiskers have good compatibility and good interface binding strength, the advantages of ultra-fine inorganic filler and enhanced fiber can be used as efficient functional materials, based on non-toxic characteristics as additives added to PP will not aggravate the harm caused by white pollution.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a High‐Performance Anti‐Aging Polypropylene Composite with Titanium Oxide and Calcium Sulfate Shielding Agents

Cong,

Lan,

Wang

et al. 2024

ChemistrySelect

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Polypropylene is a thermoplastic synthetic resin that is widely used across industries. However, it tends to fracture easily and get oxidized under ultraviolet light and high temperatures. This not only reduces its service life but also causes pollution and waste. Although the use of TiO2 as a shielding agent has improved the aging performance of PP composite materials, it still has poor mechanical and processing properties that do not meet the actual demand for high‐performance polypropylene.This limitation seriously impacts the development of polypropylene products. In this paper, we propose the use of the ATRP method with UV shielding titanium dioxide (TiO2) and high‐toughness calcium sulfate whiskers (CSW) coated with coupling agent KH570 surface modification after grafting acrylonitrile (AN). This material has a dual shielding effect on UV light. TiO2‐PAN (TP) mainly plays the role of anti‐aging, whereas CSW‐PAN(CP) mainly enhances the compatibility and mechanical strength between TP and CP. Additionally, CP has a certain UV shielding function due to grafting acrylonitrile. When added to PP in a certain proportion, TP and CP work together to improve the overall performance of polypropylene.

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Section: Introductionmentioning

confidence: 99%

Preparation of a High‐Performance Anti‐Aging Polypropylene Composite with Titanium Oxide and Calcium Sulfate Shielding Agents

Cong,

Lan,

Wang

et al. 2024

ChemistrySelect

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“…Compared with solid-solid PCMs with low latent heat and liquid-gas PCMs with large volume change during phase transition, solid-liquid PCMs have been widely used in latent heat storage due to their high latent heat, low undercooling, nontoxicity, and good thermal stability. [8][9][10][11][12] However, the leakage in the process of transforming from solid state to liquid state restricts the wide application of PCMs in the building envelope. To overcome this shortcoming, impregnating porous structural materials with PCMs has been proved to be a practical and effective method, such as diatomite, [13][14][15][16] kaolin, [17][18][19] montmorillonite, [20][21][22] expanded perlite, [23][24][25][26] and so on.…”

Section: Introductionmentioning

confidence: 99%

Expanded vermiculite supported capric–palmitic acid composites for thermal energy storage

et al. 2023

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“…Calcium sulfate whiskers (CSWs) are single crystals with a large aspect ratio that have excellent properties such as good shape integrity, high strength, high temperature resistance, chemical resistance, and high toughness [ 1 , 2 , 3 ]. When used as reinforcing fillers, CSWs significantly improve the impact resistance, modulus, and heat resistance of polyvinyl chloride (PVC) composites [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

PMMA-Grafted Calcium Sulfate Whiskers for Applications as Fillers in PVC

Líu

Nie

et al. 2022

Polymers

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Calcium sulfate whiskers (CSWs) were hydroxylated with a sodium hydroxide (NaOH) solution and isolated for subsequent treatment with an ethanolic 3-(methacryloxy)propyltrimethoxysilane (KH570) solution to introduce C=C double bonds on the CSWs’ surfaces. Then, CSW-g-PMMA was prepared by grafting polymethyl methacrylate (PMMA) onto the surface of modified CSW using in situ dispersion polymerization. The CSW-g-PMMA was used as a filler and melt-blended with polyvinyl chloride (PVC) to prepare PVC-based composites. The surface chemical structure, PMMA grafting rate, and hydrophobic properties of CSW-g-PMMA were analyzed using X-ray diffraction, diffuse reflectance Fourier-transform infrared spectroscopy, thermogravimetric analysis, and water contact angle measurements, respectively. The effects of the CSW-g-PMMA filler on the mechanical properties of the CSW-PMMA/PVC composites were also investigated. The results showed that NaOH treatment significantly increased the number of hydroxyl groups on the surface of the CSWs, which facilitated the introduction of KH570. PMMA was successfully grafted onto the KH570 with a grafting rate of 14.48% onto the surface of the CSWs. The CSW-g-PMMA had good interfacial compatibility and adhesion properties with the PVC matrix. The tensile, flexural, and impact strengths of the CSW-g-PMMA/PVC composite reached 39.28 MPa, 45.69 MPa, and 7.05 kJ/m2, respectively, which were 38.55%, 30.99%, and 20.10% higher than those of the CSW/PVC composite and 54.52%, 40.80%, and 32.52% higher than those of pure PVC, respectively. This work provides a new method for surface modification of inorganic fillers, resource utilization, and high value-added application of CSWs from phosphogypsum.

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Mechanical behavior of calcium sulfate whisker-reinforced paraffin/gypsum composites

Cited by 33 publications

References 40 publications

Preparation of a High‐Performance Anti‐Aging Polypropylene Composite with Titanium Oxide and Calcium Sulfate Shielding Agents

Preparation of a High‐Performance Anti‐Aging Polypropylene Composite with Titanium Oxide and Calcium Sulfate Shielding Agents

Expanded vermiculite supported capric–palmitic acid composites for thermal energy storage

PMMA-Grafted Calcium Sulfate Whiskers for Applications as Fillers in PVC

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