Materials Research Express
·
2020
·Vol. 7
·期 1
·015316
·
IF 1.929
Chaoyuan Shen,Shiai Xu
Three functionalized polypropylenes (PPs) were successfully prepared for use as the inner adhesive layer of aluminum/polymer laminated film by melt grafting of maleic anhydride (MAH) on PP with styrene (St), diallyl phthalate (DAP) and triallyl isocyanurate (TAIC) as co-monomers, respectively. The effects of these co-monomers (St, DAP and TAIC) on the grafting degree of MAH, gel content, thermal property and adhesive performance of MAH grafted PP (PP-g-MAH) were investigated. The results show that the T-peeling and heat-sealing strengths of TAIC-assisted PP-g-MAH (PP-g-MAH/TAIC) are 28.6 and 70.4 N /15 mm, which are increased by 33.6% and 20.8% compared to DAP-assisted PP-g-MAH (PP-g-MAH/DAP), and by 142.4% and 81.0% compared to St-assisted PP-g-MAH (PP-g-MAH/St), respectively. The grafting degree of MAH reaches a maximum of 2.3 wt% in PP-g-MAH/TAIC, which leads to a higher crystallization temperature than PP-g-MAH/DAP and PP-g-MAH/St. PP-g-MAH/TAIC also has better thermal stability than the other two functionalized PPs, as TAIC can effectively reduce PP chain scission and promote the formation of a cross-linked structure during the melt grafting.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Futures
·
2022
·Vol. 1
·期 4
·045301
·
IF 0
Junjie Wang,Danyang Li,Jian Wang,Junbiao Peng
Quasi-two-dimensional (quasi-2D) perovskites are promising materials for potential application in light-emitting diodes (LEDs) due to their high exciton binding energy and efficient emission. However, their luminescent performance is limited by the low-n phases that act as quenching luminescence centers. Here, a novel strategy for eliminating low-n phases is proposed based on the doping of strontium bromide (SrBr2) in perovskites, in which SrBr2 is able to manipulate the growth of quasi-2D perovskites during their formation. It was reasonably inferred that SrBr2 readily dissociated strontium ions (Sr2+) in dimethyl sulfoxide solvent, and Sr2+ was preferentially adsorbed around [PbBr6]4− through strong electrostatic interaction between them, leading to a controllable growth of quasi-2D perovskites by appropriately increasing the formation energy of perovskites. It has been experimentally proved that the growth can almost completely eliminate low-n phases of quasi-2D perovskite films, which exhibited remarkably enhanced photoluminescence. A high electroluminescent efficiency matrix green quasi-2D perovskite-LED (PeLED) with a pixel density of 120 pixels per inch fabricated by inkjet printing technique was achieved, exhibiting a peak external quantum efficiency of 13.9%, which is the most efficient matrix green quasi-2D PeLED so far to our knowledge.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 21
·12700-12706
·
IF 3.269
Jinchao Ma,Hongwei Yang,Guangbin Cheng
Herein, a series of esteryl-bridged energetic compounds were prepared using a simple and efficient esterification approach. All the compounds were fully characterized by IR spectroscopy, multinuclear NMR spectroscopy, mass spectrometry, elemental analysis, thermogravimetric analysis (TG), and differential scanning calorimetry (DSC). Structures of 1 and 4 were further confirmed by single crystal X-ray diffraction. Energetic performance was evaluated by EXPLO5 based on the measured densities and calculated heats of formation (Gaussian 09). These fluorodinitroethyl esters have good thermal stabilities (190.7–208.3 °C) and high densities (1.81–1.90 g cm−3). Detonation pressures and velocities of 1–5 fall in the range of 27.4–36.6 GPa and 7870–8459 m s−1, respectively. Sensitivity data based on impact and friction tests show that these compounds are insensitive (IS = 27.6–40 J; FS > 360 N). Moreover, two of the representative compounds 1 and 4 exhibit the desired melting points (1: 85.0 °C; 4: 94.7 °C) as the ideal melt cast explosives, relatively high detonation properties (D = 8459, 8196 m s−1; P = 36.6, 29.8 GPa), as well as relatively low sensitivities (IS = 30.5, 27.6 J; FS > 360 N).
研究领域:
化学
·
材料科学
·
爆炸物研究
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2020
·Vol. 94
·期 3
·671-680
·
IF 2.008
Huang Xuelin,Ke Rui,Dong Yinsheng
A hybrid organic–inorganic sol–gel coating was prepared on the surface of cast aluminum–silicon (Al–Si) alloy via dip coating method to improve the anticorrosion ability. In the present work, bis(triethoxysilyl) ethane (BTSE) and 3-glycidoxypropyl-trimethoxysilane (GPTMS) were employed as the precursors to prepare hybrid sol–gel (BG) coating. Nano titanium dioxide (nano-TiO 2 ) was introduced to improve the corrosion resistance of the coating. The microstructures of the BG/nano-TiO 2 (BG-T) coating was characterized by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and Fourier-transform infrared (FT-IR) spectroscopy. The results showed that there was a chemical reaction between nano-TiO 2 and BG coating and a complete defect-free coating formed on the surface of Al–Si alloy. Moreover, there were a few only minor cracks appeared on the surface of BG-T coating after 15 days immersion in 3.5 wt.% NaCl solution. The corrosion resistant performances of the coatings were evaluated by the electrochemical tests. The results showed that the nano-TiO 2 particles elevated the corrosion potential and depressed the corrosion current, thereby improved the corrosion resistance. The long-term immersion tests of BG and BG-T coating further showed that the BG-T coating possesses an excellent long-term stability for corrosion protection.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2021
·
IF 7.205
Xuelin Huang,Liang Yu,Yinsheng Dong
A series of aluminum phosphate ceramic coating with the entrapped ceria (CeO 2 ) nanoparticles, which is denoted APC, were constructed by steam-assisted curing method on cast Al-10Si alloy. The composition, structure and morphology of the coatings were investigated using FT-IR, XRD, XPS and SEM. Moreover, the corrosion properties of coatings were evaluated by the electrochemical tests. All the coatings were demonstrated to be homogeneous, compact on the substrate surface. The appropriate amount of CeO 2 can effectively improve the corrosion resistance and durability of the coating. In addition, the formation and corrosion resistance mechanism of the coatings were studied in this work.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yue Shen,Zheng Li,Ying Liu,Jing Tao Wang
Polyvinylidene fluoride (PVDF) has attracted significant attention for its unique piezoelectric and ferroelectric properties. However, traditional processing primarily results in the non-polar α phase, limiting its applications. This study prepared PVDF films via solution casting followed by rolling at various temperatures to promote the transition to the β phase. High-temperature rolling significantly enhanced the β phase content, improved the microstructure and orientation of the films, and markedly enhanced the piezoelectric and ferroelectric properties. Particularly, the films rolled at 90 °C exhibited a higher relative content of the β phase, showing exceptional piezoelectric performance with a d 33 value of 26 pC/N and ferroelectric properties with a remanent polarization (P r ) of 13.69 μC/cm 2 . Additionally, hot rolling at higher temperatures notably improved the mechanical properties, enhancing both tensile strength and elongation at break. The optimized PVDF films present broad application prospects in areas such as sensors. This study provides a method and theoretical guidance for the preparation of high-performance PVDF-based functional materials.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2025
·
IF 3.7
Yiyong Zeng,Haixia Sui,Xinyu Liu,Haiyue Hou,Yujie Li,Muhammad Qamer Abbas,Yan Song,Daoyuan Yang,Zhenxia Du
The full chain of prepared dishes involves hot filling into the package and high-temperature steaming with packaging, which may lead to more migrants from the package into the prepared dishes due to the high temperature. This study focused on the safety of the prepared dishes packaging. First, migration tests were designed to fully simulate the entire contact process between polyethylene terephthalate/aluminium foil/polyamide/retort cast polypropylene (PET/Al/PA/RCPP) composite films packaging pouches and prepared dishes throughout the full chain, based on GB 31604.1-2023. A comparison was made with room temperature simulation tests to investigate the effects of high temperature on migrants. Gas chromatography-mass spectrometry (GC-MS) and ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS) were used for the non-target screening of the migrants. A total of 17 non-volatile compounds were identified in the full-chain simulation, while only seven were detected in the room temperature simulation. Especially, the oligomers of inner polyamide 6 (PA 6) migrated through the RCPP layer into the simulants. Principal component analysis (PCA) and orthogonal partial least squares-discriminant analysis (OPLS-DA) were employed to visualize differences in migrants between the full-chain and room temperature simulation. Based on the quantitative analysis, risk assessment was conducted. Ethylene glycol adipate cyclic oligomers exceeded the toxicological concern threshold under full-chain simulation, necessitating more refined risk assessment approaches. These results confirm that high temperature promotes the migration of substances from the packaging, suggesting that prepared dishes should avoid hot filling in the future. If conditions allow, consumers had better not heat them in their packaging to minimize exposure to migrants.
研究领域:
食品包装安全
·
食品接触材料
·
分析化学
·
迁移研究
·
风险评估
✓ 已验证
产品关联
DOI
高影响因子
Polymer-Plastics Technology and Materials
·
2019
·
IF 0
Wang Wenqi,Ying Jie,Ma Xiangyan,Wang Jikui,Xinyuan Guan,Ting Wei,Ziming Qian
Monomer cast nylon was incorporated with different contents of kaolin, which is grafted with poly (ethylene glycol diglycidyl ether) via in-situ polymerization. The influence of treated-kaolin and kaolin contents on composites properties was studied. Treated-kaolin has a better effect on the properties of nylon than kaolin. Thermogravimetric analysis and Differential scanning calorimetry analysis show that that the feeding of kaolin improved thermal stability and crystallinity of nylon. The results indicate that using treated-kaolin as reinforcement, the composites displayed remarkable mechanical properties, the tensile strength and notched impact strength are 83.6 MPa and 4.46 MPa, respectively. The water absorption capacity of composites was greatly reduced by 50% with the feeding of kaolin.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
ACTA MATERIALIA
·
2024
·
IF 8.3
Xingqi Liao,Mingqing Liao,Chong Wei,Zhiheng Huang,Wenjiu Duan,Xiaoming Duan,Delong Cai,Laurent Gremillard,Zhihua Yang,Dechang Jia,Yu Zhou
For the engineering applications of freeze-cast porous ceramics, the demand targets are often multiple and competing, which is a challenging problem to seek a Nash equilibrium in the high-dimensional design space. An accurate and robust quantification of process-structure-property correlations would provide an effective path to find the set of Pareto optimal materials for one specific need. In this work, using porous Si 3 N 4 -Si 2 N 2 O ceramics as the model materials, a hybrid model for the quantitative design of the microstructure and mechanical properties is developed from four physics-based process-microstructure models with sintering, solidification, phase transformation and grain growth kinetic theories, and the subsequent data-driven structure-property model utilizing a machine learning method, artificial neural network (ANN). The SHapely Additive exPlanations (SHAP) analysis is further introduced to interpret the ANN model and mathematically identify the contribution of each microstructure feature descriptor toward target mechanical property outputs. These results present a systematic understanding of the process-structure-property relationships through the hybrid model, guiding the optimal design of the freeze-cast porous ceramics with required microstructures and mechanical properties.
研究领域:
材料科学
·
机器学习
·
工程学
✓ 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）