JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 32
·46579
·
IF 1.901
Xie Li,Wei Li,Zhiqing Liu,Xiaolin Wang,Heling Guo,Rongjie Wang,Xuhong Guo,Cuihua Li,Xin Jia
Polyurethane (PU) has been widely used as a glue in various areas. However, adhesion in the presence of water is greatly impeded and results in most synthetic adhesive failure. In this study, we designed and synthesized a novel PU construction; underwater PU adhesives were created by the incorporation of synthetic glycerol monomethacrylate (GMA). Furthermore, the urethane structure helped the adhesive eliminate the interfacial water barrier through interactions that were stronger than hydrogen bonding, and GMA as a crosslinking agent was used to generate post-covalent-crosslinking networks through radical polymerization. This enhanced the cohesion so the diffusion of water molecules could be overcome. Fourier transform infrared spectroscopy, thermogravimetric analysis, underwater adhesion measurements, and tensile tests were used to characterize the chemical and mechanical properties of the as-obtained adhesive. This led to an adhesive with a better mechanical strength and interfacial adhesion in water, and the results show that the mechanical properties (tensile strength, Young's modulus, and tensile elongation) of the GMA–PU adhesive were higher than those of the pure PU. As for the 4% GMA, the tensile strength was enhanced by 24.3% and the elongation was enhanced by 125.23% over those of the pure PU. This confirmed that the incorporation of GMA into the PU matrix indeed induced increasing cohesion, and the sample's adhesive strength was 21.19 ± 3.9 MPa; this indicated a superior adhesive strength over that of the pure PU. In addition, we can foresee that underwater adhesion will play an important role in prospective surgery and engineering areas. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46579.
研究领域:
高分子材料
·
生物医学工程
·
粘附科学
·
组织工程
·
医用胶粘剂
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Shaojie Zhang,Chao Yu,Na Liu,Yun Teng,Cuiyu Yin
In this study, cellulose pulp and urea were used to synthesize cellulose carbamate (nitrogen content reaches 4.5%) by low-cost and environmentally friendly solid-liquid phase method. Cellulose carbamate fluid was prepared by using sodium hydroxide aqueous solution as solvent. The fluid was regenerated and formed in a coagulation bath , and finally a regenerated cellulose membrane with high transparency and separation ability was obtained. The simple chemical treatment of cellulose not only greatly increased the mass fraction of cellulose dissolution (It has reached 15%) and retains the original crystal form and thermal stability of cellulose. The surface of the membrane was relatively dense, and the inside has regular microchannel . The factors affect the transparency and water flux of regenerated cellulose membranes were discussed by orthogonal experimental range analysis. The ability of the regenerated cellulose membrane to reject dyes was tested. The results showed that the rejection of methyl blue and congo red reached 100%, and the rejection rate of methyl orange reached 60%. The oil/water separation ability and the anti-pollution ability of the regenerated cellulose membrane were tested. The oil/water separation effect reached 100%. This membrane may have application prospect in water treatment, biotechnology.
研究领域:
材料科学
·
环境工程
·
膜技术
·
高分子化学
·
水处理
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2018
·
IF 3.024
Di Wang,Shanshan Sun,Te Sha,Tongjing Liu,Honghong Dong,Kai Cui,Hailan Li,Yejing Gong,Jirui Hou,Zhongzhi Zhang,Pengcheng Fu
Wettability modification is one of the main mechanisms to increase oil recovery from low-permeability oil reservoirs. Nanofluids composed of nanoparticles can be used as modifiers to alter wettability from oil-wet to water-wet condition thus to promote hydrocarbon recovery. Biosurfactants, which are candidates to replace synthetic surfactants for industrial applications, have the potential to prepare nanofluids. In this study, nanofluids prepared by dispersing SiO2 nanoparticles in rhamnolipid solution (hereby named bionanofluids) were considered potential wettability modifiers to apply to petroleum recovery from low-permeability sandstone reservoirs. Analyses via visual observation, optical absorbance measurement, ζ-potential determination, and particle size measurements demonstrated that the bionanofluids with 25 ppm rhamnolipids maintained an optimal stability. The effect of bionanofluids on wettability alteration was investigated through contact angle measurement and imbibition test. The results showed that bionanofluids could alter the wettability of oil-wet sandstone to strongly water-wet. The best performance was achieved with a nanoparticle concentration of 1000 ppm. Additionally, a micromodel test using rhamnolipid solution and bionanofluid was carried out to evaluate the synergistic effects of SiO2 nanoparticles and rhamnolipid on displacing oil. Bionanofluid injection following biosurfactant flooding was shown to improve oil recovery, yielding an additional 5% production. These results reveal that the bionanofluid prepared with SiO2 and rhamnolipids not only remained stable but also provided a potential way for enhanced oil recovery.
研究领域:
石油工程
·
纳米技术
·
表面化学
·
提高采油率
·
胶体与界面科学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2019
·
IF 3.021
Yuchuan Chen,Bohui Shi,Yang Liu,Qianli Ma,Shangfei Song,Lin Ding,Xiaofang Lv,Haihao Wu,Wei Wang,Haiyuan Yao,Jing Gong
With the tendency of the offshore petroleum industry moving to the deep-water fields, there are several challenges for the exploration and development of oil and gas with higher paraffin content in the deep-water severe environment, especially the complex flow assurance issues including the coexistence of wax precipitation and hydrate formation. The effects of wax on hydrate slurry viscosity, hydrate nucleation and growth, and hydrate dissociation were investigated in a rheometer. Results indicated that the stage characteristics of viscosity evolution during hydrate formation in waxy and wax-free emulsions were different, and two stages could be observed during the hydrate growth process in the presence of wax. Hydrate slurry viscosity increased with the wax content. The coupled hydrate–wax aggregates were difficult to be broken by the constant shearing force. The shear-thinning property of the hydrate slurry was not affected by the precipitated wax. Hydrate formation was inhibited due to the wax precipitated in the oil phase. Specifically, cyclopentane hydrate critical time and growth time increased with the wax content. The calculated hydrate volume fraction decreased with the wax content based on the suspension viscosity model. It was difficult for a water bridge to form between two hydrate particles during the hydrate-dissociation process with 3.0 and 5.0 wt % wax contents; therefore, no obvious increase in the slurry viscosity was observed when the slurry viscosity decreased during the dissociation process.
研究领域:
石油工程
·
流变学
·
能源材料
·
多相流
·
流动保障
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Shanghua Feng,Binbin Zhao,Lei Liu,Jinxiang Dong
Platinum-loaded WO3–Al2O3–SiO2 catalysts, denoted as Pt/WAlSi, in glycerol hydrogenolysis to 1,3-propanediol (1,3-PDO) with a batch reactor were investigated, wherein the WO3-doped silica–alumina material with a homogeneous dispersion was prepared by sol–gel method and Pt was loaded onto it by incipient wetness impregnation. The catalysts were characterized by powder XRD, N2 adsorption–desorption, TEM, CO chemisorption, NH3-TPD, Py-IR, and XPS. The WO3/Al2O3 ratio and Pt loading amount are shown to be of importance in determining the activity and directing the selectivity to 1,3-PDO. It was found that 2% Pt/WAlSi with the ratio of WO3 to Al2O3 at 2 has a suitable Brønsted acidity and contributes to a high selectivity to 1,3-PDO close to 56% at 48% glycerol conversion, and the space time yield for 1,3-PDO in an optimized reaction condition could reach 18.34 g/(gPt h), much higher than the best result reported in the literature. A plausible mechanism of glycerol hydrogenolysis was proposed from the reaction results.
研究领域:
催化化学
·
应用化学
·
材料科学
·
工业催化
·
绿色化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 32
·11901-11907
·
IF 5.101
Shengyang Tao,Yuchao Wang,Yonglin An
Monolithic silica with macroporous skeleton and well-defined mesopores was prepared via sol–gel method by using triblock polymer P123 as the structure directing agent and tetramethoxysilane (TMOS) as the silicon source. The large macroporous channels (3 μm in diameter), formed by phase separation and sol–gel transition, ensure the substances diffuse in the bulk easily. Appropriate specific area (nearly 400 cm2 g−1) and mesopores (17.67 nm in diameter and 1.99 cm3 g−1 in volume) supply enough space for storing the molecules absorbed. After grafting organic groups on their surface, hydrophobic monolithic hierarchically porous silica (MHS) could be prepared with high capability to adsorb oils and organic contaminants on the surface of water without coadsorption. In order to explore the factors impacting the ability of adsorption, a series of properties are characterized including the BET surface, porous size and water contact angle by changing the type and dosage of modifying agents. The maximum absorptive ability can reach 8 times the monolith's weight, and materials could be recycled more than 20 times by an easy treatment. Good selectivity, better thermal stability, easy removing and excellent recyclability for oil removal give the material potential applications.
研究领域:
材料科学
·
环境工程
·
纳米技术
·
表面化学
·
多孔材料
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Kanjun Sun,Dongyang Guo,Xiaoping Zheng,Yanrong Zhu,Yanping Zheng,Mingguang Ma,Guohu Zhao,Guofu Ma
In this paper, nitrogen-doped activated carbons obtained from rapeseed residues (N-RCs) as supercapacitor electrodes are successfully synthesized by a simple chemical activation method. The field emission scanning microscope, transmission electron microscopy, and N 2 adsorption-desorption tests demonstrate that N-RCs treated with ZnCl 2 can produce a large number of mesopores. Additionally, the N-RCs have certain amount of nitrogen (nitrogen content in N-RC2 is 6.55% by element content analysis). As the electrode material, N-RC2 exhibits ideal capacitive behavior in 6 mol L -1 KOH aqueous electrolyte in a three-electrode system tests, and the maximum specific capacitance reaches 250 F g -1 at a current density of 0.5 A g -1 . Furthermore, in 0.5 mol L -1 Na 2 SO 4 aqueous electrolyte, the as-assembled N-RC2//N-RC2 symmetric cell exhibits high energy density of 13.55 Wh kg -1 at a power density of 399.80 W kg -1 operated at the voltage range of 0 to 1.8 V and an excellent cycleability retaining about 92.8% initial capacitance after 5000 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
环境功能材料
✓ 已验证
DOI
高影响因子
Energy Technology
·
2019
·Vol. 7
·期 11
·1900754
·
IF 3.163
Shikun Cheng,Qiang Ru,Zhenglu Shi,Yuqing Gao,Yang Liu,Xianhua Hou,Fuming Chen,Francis Chi-Chung Ling
Plant oil–inspired 3D flower-like Zn 3 V 3 O 8 nanospheres coupled with nitrogen doped (N-doped) carbon synthesized via the microemulsion/calcination strategy are used as anodes for lithium-/sodium-ion batteries (LIBs/SIBs). The synergistic interaction between the unique 3D flower-like structure and the existence of N-doped carbon can provide enough space to buffer volume expansion during the Li + /Na + intake/outlet process and enhance conductivity, respectively. Thus, the material delivers progressive electrochemical performance. Specifically, the Zn 3 V 3 O 8 nanospheres exhibit a reversible specific capacity of 1140.6 mAh g −1 after 200 cycles for LIBs and 113.0 mAh g −1 after 400 cycles for SIBs at a current density of 200 mA g −1 . Furthermore, the Zn 3 V 3 O 8 nanospheres electrode owns rate capability for LIBs such as 933.8, 847.9, 780.8, and 664.1 mAh g −1 at elevated current densities of 200, 400, 800, and 1600 mAh g −1 , respectively. In addition, it delivers reversible capacities of 207.5, 119.2, 74.1, and 42.7 mAh g −1 at 100, 200, 500, 1000, and 2000 mA g −1 for SIBs, respectively.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 39
·18338-18346
·
IF 6.97
Qi Li,Zhiguang Guo
Solid surfaces with unique superhydrophobic and superoleophobic wettability in air have thus far shown incomparable applications in various fields. However, existing superoleophobic surfaces are always limited by their sophisticated fabrication strategies. Moreover, surface durability also restricts their further application since the well-designed structures and low-surface-energy chemical components are very susceptible to chemical and physical damage. In this study, we report the exploitation of a durable superhydrophobic and superoleophobic spray and dip coating, which is successfully fabricated by employing 3-aminopropyltriethoxysilane and fluoroalkyl silane to modify two sizes of SiO2 particles. The wettability of the developed surface can be tuned by adjusting the mass ratio of the particles due to the change in hierarchical structure. On account of its super-repellence and independence from the substrate, the coating can be coated onto various hard and soft substrates. The as-prepared surfaces exhibit superphobicity to both water and organic fluids with low surface tension, and these liquid droplets can easily roll and bounce on the coated surface, leaving no residues. Furthermore, the coating shows positive antifouling and self-cleaning performances when contaminated or immersed in different liquids. Importantly, the coating is also durable, withstanding harsh environments, such as exposing the coated surface in acid and alkali solution or to high temperatures for a long time, without obviously altering its superamphiphobicity due to the high adhesiveness of poly(vinylidene fluoride hexafluoropropylene) and stable re-entrant-like structure. Its merits of a straightforward fabrication approach and multifunctionality may make the coating suitable for widespread practical applications.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
高分子化学
·
功能涂层
✓ 已验证
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2021
·Vol. 21
·期 10
·12146-12152
·
IF 3.301
Haijin Chen,Xuehao Hu,Xiaoyong Chen,Qianqing Yu,Zhenggang Lian,Heng Wang,Hang Qu
In this paper, we proposed an in-fiber Mach-Zehnder temperature sensor based on a dual-core fiber (DCF) in which one core, working as the sensing arm, is suspended in an embedded fluidic channel filled with silicone oil, while the other one, working as the reference arm, locates eccentrically in the DCF. Temperature variations would change the refractive index of silicone oil infiltrated as well as the effective index of the guided mode in the suspended core, thus shifting the interference spectra. Both experiments and numerical simulations were carried out to characterize the sensor. The spectrum shifts measured experimentally agreed well with the theoretical results. Experimental sensitivity of the sensor using a DCF infiltrated with ~20 cm-long silicone oil was found to be as high as −1.42 nm/°, comparable to those of the SPR fiber sensors and other interferometric sensors. The measuring range of the sensor was more than 120°. The proposed sensor could be easily fabricated with good robustness and stability, which makes the sensor promising for applications such as environment and architecture monitoring.
研究领域:
光学工程
·
传感器技术
·
生物医学工程
·
精密测量
·
光纤通信
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 100
·82027-82033
·
IF 3.84
Runjun Lin,Ang Li,Tingting Zheng,Lingbin Lu,Yang Cao
Adsorbent materials as well as hydrophobic modification methods have been at the forefront of research creating environmentally hazardous waste. Herein, we report a facile, green preparation method for cellulose aerogels. Cold plasma technology was employed for hydrophobic modification of the aerogel surface using trimethyl-chlorosilane (TMCS) as the plasma. Notably, the modification procedure was considerably more rapid (less than 3 min), more efficient and economically viable than traditional methods. The highly flexible modified cellulose aerogels are hydrophobic (ca. 150°), oleophilic and ultralight (as low as 0.0196 g cm−3). Compared to conventional oil adsorbent materials, these low-cost, environment-friendly cellulose aerogels exhibit excellent adsorption properties (peanut oil, 34.5 g g−1) as well as remarkable reusability (more than 15 times). Therefore, the preset work would play a significant role in further advancing the fields of adsorbent materials and hydrophobic modification methods.
研究领域:
材料科学
·
环境工程
·
高分子化学
·
纳米科技
·
表面科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2019
·
IF 2.29
Junjie Chen,Bo Jin,Guan Luo,Huihui Liu,Qingchun Zhang,Qi Huang,Rufang Peng
The thermodynamics and kinetics of the curing reactions between polyglycidyl nitrate (PGN) and toluene diisocyanate, isophorone diisocyanate, and polyaryl polymethylene isocyanate (PAPI) were studied by microcalorimetry. The reaction rate between PGN and PAPI was the fastest among the three reactions above. Three thermodynamics ( i.e. , activation enthalpy, entropy, and free energy), rate constant, and three thermokinetic parameters ( i.e. , activation energy, pre-exponential constant, and reaction order) of the curing reactions were obtained by calculating the results of the reaction between PGN and PAPI at a series of temperature from 303.15 K to 318.15 K. The linear relationship between ln k and the mole ratio of the isocyanate and hydroxyl groups was observed. The corresponding kinetic equation describing the curing reaction between PGN and PAPI was d α /d t = 10 −3.83 (1 − α ) 3.04 at 318.15 K.
研究领域:
高分子化学
·
热力学
·
反应动力学
·
功能材料
·
含能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）