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Dioctyl Phthalate-Modified Graphene Nanoplatelets: An Effective Additive for Enhanced Mechanical Properties of Natural Rubber
Polymers Số 13, năm 2022 (Tập 14, trang -)
ISSN: 20734360
ISSN: 20734360
DOI:
Tài liệu thuộc danh mục:
Article
English
Từ khóa: Abrasion; Additives; Erosion; Esters; Scanning Electron Microscopy; Tensile Strength; Abrasion; Additives; Erosion; Esters; Graphene; Scanning electron microscopy; Tensile strength; Wear resistance; Composites material; Dioctyl phthalate; Dispersibilities; Electron conductivity; Graphene nanoplatelets; High surface area; Modified graphene; Rubber composite; Rubber matrix; Thermal; Rubber
Tóm tắt tiếng anh
Graphene has been extensively considered an ideal additive to improve the mechanical properties of many composite materials, including rubbers, because of its novel strength, high surface area, and remarkable thermal and electron conductivity. However, the pristine graphene shows low dispersibility in the rubber matrix resulting in only slightly enhanced mechanical properties of the rubber composite. In this work, graphene nanoplatelets (GNPs) were modified with dioctyl phthalate (DOP) to improve the dispersibility of the graphene in the natural rubber (NR). The distribution of the DOP-modified GNPs in the NR matrix was investigated using scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The effect of the modified GNPs’ contents on the mechanical properties of the GNPs/NR composite was studied in detail. The results showed that the abrasion resistance of the graphene-reinforced rubber composite significantly improved by 10 times compared to that of the rubber without graphene (from 0.3 to 0.03 g/cycle without and with addition of the 0.3 phr modified GNPs). The addition of the modified GNPs also improved the shear and tensile strength of the rubber composite. The tensile strength and shear strength of the NR/GNPs composite with a GNPs loading of 0.3 phr were determined to be 23.63 MPa and 42.69 N/mm, respectively. Even the presence of the graphene reduced the other mechanical properties such as Shore hardness, elongation at break, and residual elongation; however, these reductions were negligible, which still makes the modified GNPs significant as an effective additive for the natural rubber in applications requiring high abrasion resistance. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.