APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Fubao Gong,Jun Shen,Runhua Gao,Xiong Xie,Xiong Luo
A novel organic–inorganic Mg(OH) 2 /silane surface layer has been developed for corrosion protection of AZ31 magnesium alloy. The results of electrochemical impedance spectroscopy (EIS), the immersion tests, Fourier-transform infrared spectroscopy (FTIR) and sellotape tests showed that the Mg(OH) 2 /silane-based composite surface layer possessed excellent corrosion resistance and very good adhesion due to the formation of Si–O–Mg bond between Mg(OH) 2 layer and silane layer. Electrochemical impedance spectroscopy tests results indicated that for the long-term corrosion protection of AZ31 the increase of the curing temperature improved the impedance of the composited layer when the curing temperature was lower than 130 °С. However, the impedance of the composited layer deceased when the curing temperature was more than 130 °С due to the carbonization of the silane layer.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2019
·
IF 6.282
Abdul Qadeer Dayo,Aijaz Ahmed Babar,Qi-rui Qin,Sadia Kiran,Jun Wang,Ahmer Hussain Shah,Abdeldjalil Zegaoui,Hamid Abdelhafid Ghouti,Wen-bin Liu
In the current study, three different kinds of hemp fibre treated polybenzoxazine composites were exposed to accelerated weathering at 30 °C and 80% relative humidity (RH), till the saturated moisture uptake. The tensile, flexural, and impact properties of saturated samples were evaluated and results were compared with the unconditioned samples. The silane treated hemp fibre (STHF) composites showed the lowest decline in the properties. Afterwards, the STHF composites were exposed to various accelerated weathering conditions, in the range of 25–35 °C and 40–80% RH. Moisture uptake was slightly increased and tensile and flexural properties were gradually decreased as the exposure temperature and RH were increased. Highest decline was observed in the samples exposed at 35 °C and 80% RH. Furthermore, the slightly higher impact values were observed for the exposed composites. The composites colour was slightly lost and changes to lower shaded as the temperature and RH were raised.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 21
·8900-8916
·
IF 3.553
Wang Xinyu,Qiang Dayuan,Hosier Ian,Zhu Yanqiu,Chen George,Andritsch Thomas
The influence of water immersion and silane treatment on the AC breakdown and the complex dielectric response of polypropylene/nano-aluminium nitride (PP/nano-AlN) composites has been investigated. The as-received filler was examined to have a nanoscale particle distribution with a hexagonal shape and slight hydrolysation. Grafting the aluminium nitride with an octyl silane reduces the weight increase in samples filled with 10 wt% of aluminium nitride during water immersion by 3, from 0.29 to 0.09%. The results suggest that the AC breakdown strength and complex permittivity of “wet” composite samples are related to the silane treatment of the nanofiller. The AC breakdown strength of octyl silane-treated samples after 9 days of water immersion shows comparable results to the dry samples, while a reduction can be seen on non-treated samples. Although silane-treated samples still show an increased dielectric loss at low frequency after water immersion, a significant reduction in low-frequency dispersion of real and imaginary permittivity can be seen when compared to the non-treated composites. This indicates that significant gains can be obtained for PP/nano-AlN composites by suitable silane treatments.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITE INTERFACES
·
2022
·
IF 2.839
Esubalew Dessie,Liu Fanxizi,Tamrat Tesfaye,Rotich Kipchirchir Gideon,Adane Dagnaw Gudayua,Yiping Qiu
The aim of this paper is to study the effect of bis [3(triethoxysilyl) propyl] tetrasulfide (Si69) and 3-Glycidoxypropyl trimethoxy silane (GPS) on the properties of unidirectional enset fiber reinforced Polypropylene (PP) composite. For this purpose, enset fiber was weaved into the mat and treated with 1.5 wt% Si69 and 5 wt% GPS after which it was used to reinforce PP composites through the film stacking method followed by the compression molding. Fabricated composites were characterized by their tensile, thermal, water absorption, image of the fracture surface, and FTIR spectroscopy properties. Among the developed unidirectional reinforced PP composite, the surface-treated enset-woven mat with 1.5wt% Si69 gave the highest tensile strength with an increase of 267.1%, and 36.9% from untreated enset random (EvRa) and unidirectional fiber-reinforced PP composite (EvUnt) respectively. Moreover, 1.5 wt% Si69-treated enset fiber unidirectional reinforced PP composite reduced equilibrium water uptake percentage by approximately two folds, and thermal performance also improved by 12.9% from EvUnt composite. Notably, both silane treatment of enset fibers and composites increased elongation at break compared to EvUnt. Altogether, 1.5wt% Si69-treated enset fiber unidirectional reinforced polypropylene composite achieved a remarkable improvement of property and can be used for high mechanical and long-term performance applications.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
DOI
高影响因子
Defence Technology
·
2021
·
IF 3.172
Wissam Bessa,Djalal Trache,Mehdi Derradji,Ahmed Fouzi Tarchoun
The design of astonishing combinations of benzoxazine resins with various fillers is nowadays of great interest for high quality products, especially in ballistic armors. The objective of this study is to investigate a new hybrid material prepared as multi-layered composite plate by hand lay-up technique. Different composites were manufactured from Kevlar fabrics reinforced polybenzoxazine, which was filled with silane treated microcrystalline cellulose (MCC Si) at various amounts in the interlayers. The developed materials were tested for their flexural, dynamic mechanical and ballistic performance. The aim was to highlight the effect of adding different amounts of MCC Si on the behavior of the different plates. Compared to the baseline, the dynamic mechanical and bending tests revealed an obvious decrease of the glass transition of 21 °C and a notable increase in storage modulus and flexural strength of about 180 %and17%, respectively, upon adding 1% MMC Si as filler. Similarly, the ballistic test exhibited an enhancement in kinetic energy absorption for which the composite supplemented with 1% MCC Si had the maximal energy absorption of 166.60 J. These results indicated that the developed panels, with interesting mechanical and ballistic features, are suitable to be employed as raw materials to produce body armor.
研究领域:
材料科学
·
防护材料工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）