scholarly journals Preparation and Thermal Properties of Modified Cu2O/Polypropylene (PP) Composite

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 309
Author(s):  
Yurong Wu ◽  
Longshan Xu ◽  
Yanying Jiang
Keyword(s):  
Thermal Stability ◽  
Surface Modification ◽  
Thermal Properties ◽  
Coupling Agent ◽  
Cuprous Oxide ◽  
Silane Coupling Agent ◽  
Low Cost ◽  
Good Thermal Stability ◽  
Silane Coupling ◽  
Pp Composites

A uniform, monodispersed superfine cuprous oxide (Cu2O) sphere with a mean diameter of 850 nm has been synthesized by solution reduction. The study reported the synthesis and thermal properties of Cu2O/PP composites for the first time. The surface modification of the superfine Cu2O sphere was carried out by using a silane coupling agent KH-570. Fourier-transform infrared (FTIR) spectroscopy and the thermogravimetric analysis (TGA) curve revealed that the Cu2O had been successfully modified by silane coupling agent KH570. The scanning electron microscope (SEM) shows that the modified Cu2O can be uniformly dispersed in the polypropylene (PP) matrix, because through surface modification, there are some active functional groups on its surface, such as the ester group, which improves its compatibility with the PP matrix. The thermal stability of Cu2O/PP composites was improved by adding a small amount of Cu2O (1 wt % of PP). Therefore, based on the potential bacteriostasis of cuprous oxide, the low cost of PP and the results of this study, it is predicted that Cu2O/PP composites can be used in infant preparation (such as milk bottles) with low cost and good thermal stability in the near future.

Structure and Thermal Properties of RHA/NR Composite

2012 ◽  
Vol 482-484 ◽  
pp. 1275-1280 ◽  
Author(s):  
Zong Qiang Zeng ◽  
Hong Chao Liu ◽  
He Ping Yu ◽  
Zheng Peng
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Rice Husk Ash ◽  
Rubber Matrix ◽  
Structure And Morphology ◽  
Silane Coupling ◽  
Blending Process ◽  
Thermal Stability Of

The rice husk ash/natural rubber (RHA/NR) composites were prepared by latex blending process using the RHA modified with silane coupling agent. The structure and morphology of modified RHA were studied. The dispersing performance of modified RHA in the composites was evaluated from the structure and thermal properties. The results indicate that silane coupling agent KH-570 can react with the carboxyl of the RHA surface, leading to a significant decrease in carboxyl absorption intensity and the obvious improvement in the dispersion of RHA particles in rubber matrix. As the modified RHA having grafted onto NR molecular chains can increase the interface force between RHA and rubber matrix, the thermal stability of RHA/NR composites thus can be improved. The RHA/NR composite of highest thermal stability can be prepared with RHA load of 5% shows the best.

scholarly journals Improved Hydrophobicity of Macroalgae Biopolymer Film Incorporated with Kenaf Derived CNF Using Silane Coupling Agent

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2254
Author(s):  
Adeleke A. Oyekanmi ◽  
N. I. Saharudin ◽  
Che Mohamad Hazwan ◽  
Abdul Khalil H. P. S. ◽  
Niyi G. Olaiya ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Cellulose Nanofibrils ◽  
Hydroxyl Groups ◽  
Water Contact ◽  
Silane Coupling ◽  
Cnf Films ◽  
Kenaf Bast ◽  
Thermal Stability Of

Hydrophilic behaviour of carrageenan macroalgae biopolymer, due to hydroxyl groups, has limited its applications, especially for packaging. In this study, macroalgae were reinforced with cellulose nanofibrils (CNFs) isolated from kenaf bast fibres. The macroalgae CNF film was after that treated with silane for hydrophobicity enhancement. The wettability and functional properties of unmodified macroalgae CNF films were compared with silane-modified macroalgae CNF films. Characterisation of the unmodified and modified biopolymers films was investigated. The atomic force microscope (AFM), SEM morphology, tensile properties, water contact angle, and thermal behaviour of the biofilms showed that the incorporation of Kenaf bast CNF remarkably increased the strength, moisture resistance, and thermal stability of the macroalgae biopolymer films. Moreover, the films’ modification using a silane coupling agent further enhanced the strength and thermal stability of the films apart from improved water-resistance of the biopolymer films compared to unmodified films. The morphology and AFM showed good interfacial interaction of the components of the biopolymer films. The modified biopolymer films exhibited significantly improved hydrophobic properties compared to the unmodified films due to the enhanced dispersion resulting from the silane treatment. The improved biopolymer films can potentially be utilised as packaging materials.

Surface modification of NdFe12Nx magnetic powder using silane coupling agent KH550

2015 ◽  
Vol 26 (2) ◽  
pp. 618-621 ◽  
Author(s):  
Haibo Chen ◽  
Jingwu Zheng ◽  
Liang Qiao ◽  
Yao Ying ◽  
Liqiang Jiang ◽  
...  
Keyword(s):  
Surface Modification ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Magnetic Powder ◽  
Silane Coupling

scholarly journals A low-cost and water resistant biomass adhesive derived from the hydrolysate of leather waste

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 4024-4029 ◽  
Author(s):  
Jianfei Zhou ◽  
Teng Xu ◽  
Xiaoling Wang ◽  
Chang Liu ◽  
Xuepin Liao ◽  
...  
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Low Cost ◽  
Crosslinking Agent ◽  
Starting Material ◽  
Collagen Hydrolysate ◽  
Silane Coupling ◽  
Leather Wastes ◽  
Leather Waste

A low-cost and water resistant biomass adhesive was prepared by using collagen hydrolysate extracted from leather wastes as the starting material and silane coupling agent as the crosslinking agent.

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