MOLECULES
·
2025
·Vol. 30
·期 3
·463
·
IF 4.6
Kaihe Lv,Haokun Shen,Yuan Geng,Mei-Chun Li,Hongyan Du,Xianbin Huang,Jinsheng Sun
Wellbore instability caused by the invasion of drilling fluids into formations remains a significant challenge in the application of oil-based drilling fluids (ODFs). In this study, carbon nanospheres (CNSs) were synthesized using glucose as the carbon source through a microwave-assisted method. The effects of the reaction temperature, carbon source concentration, and reaction time on the particle size of CNSs were systematically investigated. The results revealed that under optimal conditions, CNSs with an average particle size of 670 nm were successfully synthesized, exhibiting high sphericity and excellent dispersibility. CNSs demonstrated stable dispersion in mineral oil when lecithin was used as a dispersant. The plugging performance of CNSs in ODFs was evaluated through low-pressure filtration and high-temperature, high-pressure (HTHP) filtration tests. After aging at 180 °C for 16 h, the addition of 2% CNSs reduced the filtration volume from 10.6 mL to 2.5 mL on standard filter paper (average pore size: 3 μm) and from 8.5 mL to 1.6 mL on microporous membranes (average pore size: 0.5 μm). Additionally, the HTHP filtration volume decreased from 73 mL to 18 mL, and the permeability of the filter cake formed during HTHP filtration was reduced from 26.5 × 10−3mD to 1.2 × 10−3mD. Furthermore, CNSs improved the rheological properties and emulsion stability of ODFs. With excellent compatibility and applicability, CNSs offer a promising solution for enhancing the performance of oil-based drilling fluids.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2021
·
IF 4.952
Hongxiu Fan,Hongcheng Liu,Yuetong Chen,Bingyu Chen,Dawei Wang,Shanshan Zhang,Tingting Liu,Yanrong Zhang
Incorporation of A. auricula into wheat flour dough could improve their nutritional properties, but utilization of A. auricula is limited as it causes a weakened dough and deterioration in the quality of product. In this study, A. auricula was treated using high temperature high pressure processing combined with acidic solution treatment, and the effect of A. auricula before and after the treatment on the rheological and structural properties of dough was investigated. Results showed that the high temperature high pressure-acidic solution treated A. auricula (HTHPA) did not block the formation of intrachain disulfide bonds in glutenins. On the contrary, it led to a higher aggregation extent of glutenin macropolymer by contributing to the crosslinking of proteins via noncovalent interactions. Rheological tests showed that the doughs with 2–8% HTHPA exhibited higher elastic and viscous moduli and shear-thinning behavior compared to the doughs with 2–8% untreated A. auricula (UA). This will contribute to the volumetric expansion of dough during proofing. Temperature sweep test revealed that addition of 2–8% HTHPA could reinforce the intermolecular interactions in the dough structure. This study will provide a new method to design and produce A. auricula -enriched staple foods with desirable rheological and structural properties.
研究领域:
食品科学
·
营养学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2022
·
IF 4.804
Chen Chao,Mo Peicheng,Chen Jiarong,Hu Xixi,Hu Qiaofan,Lin Feng,Wu Yi
Using TiN-Ti-AlN as the binder, polycrystalline cubic boron nitride (PCBN) composites containing Y 2 O 3 and not containing Y 2 O 3 were prepared under high temperature and ultra-high pressure conditions, respectively. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to analyze the phase composition, microstructure and surface crack morphology of the composite material. At the same time, the compactness, microhardness and bending strength of the composite material were tested. The research results show that the phase composition of PCBN sample is mainly composed of BN, TiB 2 , TiN, AlN and Y 2 O 3 at an ultra-high pressure of 5.5 GPa and a temperature of 1500 °C. With the increase of Y 2 O 3 content, the relative density of PCBN first increases and then decreases, and the changes in mechanical properties also tend to be similar. As the content of Y 2 O 3 increases, it can be seen that the peak intensity of the main peak of TiB 2 also increases, indicating that the addition of Y 2 O 3 promotes the reaction between cBN and Ti. When the Y 2 O 3 content is 3.6%, PCBN has the best comprehensive mechanical properties, with a microhardness of 34.56 GPa and a bending strength of 890 MPa.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
TEXTILE RESEARCH JOURNAL
·
2018
·
IF 1.54
Cheng Zhang,Ling Zhong,Dingfei Wang,Fengxiu Zhang,Guangxian Zhang
Grafting graphene on polyethylene terephthalate (PET) fibers requires a large number of environmentally harmful chemicals. In this study, a facile high-temperature and high-pressure method of inlaying graphene nanoplatelets was applied to fabricate anti-ultraviolet (UV) and anti-static graphene/PET composites. The resulting graphene-inlaid (GI) PET fabric, which showed excellent anti-ultraviolet and anti-static properties, was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform–infrared spectroscopy and X-ray diffraction. Results suggested that graphene had been inlaid into the PET fiber surface, and that the optimal inlaying conditions were as follows: inlaying temperature 200℃, inlaying pressure 15 MPa, and inlaying time 15 s. The UV protection factor of the GI PET fabric under optimal conditions could reach 50+ and was maintained at 50+ after 50 laundering cycles. The peak values of the static voltage and its half-time in the GI PET fabric could be reduced from 500.0 V to 10.0 V and from 7.39 s to 0.53 s, respectively, and the electrical resistivity of the GI PET fabric was 36.04 ± 0.14 kΩ.cm. The breaking strengths of the GI PET fabrics could be retained over 70.0% that of the pure PET fabric. The facile high-temperature and high-pressure inlaying method is an eco-friendly technique that requires very few chemicals, except for ethyl alcohol.
研究领域:
材料科学
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纺织工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yuanhao Luo,Ling Lin,Pingya Luo,Xingchun Li,Wen Ren,Tianhai Yi
In deep and ultra-deep well drilling, ultra-high temperatures and high salt lead to poor drilling fluid performance. In this study, N, N-dimethylacrylamide (DMAA), dimethyldiallylammonium chloride (DMDAAC), 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), 4-acryloylmorpholine (ACMO) and modified laponite (m-LAP) were polymerized into polymer nanocomposites PDADA-LAP by free radical polymerization in aqueous solution. The structure of PDADA-LAP was characterized by FT-IR, 1 H NMR and XPS. The microstructure of PDADA-LAP was characterized by TEM, SEM and EDS. The results showed that LAP improved the network structure of the polymer by hydrogen bonding and covalent bonding. The effect of temperature on the degradation of the polymer solution was investigated. The experiment showed that the degradation temperatures of the polymer was 220 °C. PDADA-LAP was used as a filtrate reducer in drilling fluids. The results showed that 3.0 wt% PDADA-LAP could improve the filtration performance of drilling fluids at high temperature of 220 °C and resist contamination with 20 wt% NaCl. The FL API and FL HTHP were 7.0 mL and 28.6 mL, respectively. PDADA-LAP is adsorbed on bentonite particles through hydrogen bonding and electrostatic interaction, which slows down the contamination of bentonite particles by NaCl and gives the drilling fluid a good effect to reduce fluid loss at high temperature and high salt.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Hanyi Zhong,Xin Gao,Zhengsong Qiu,Chong Zhao,Xianbin Zhang,Baoyu Guo,Gongrang Li
β-cyclodextrin polymer (β-CDP) microspheres were investigated as high temperature resistant filtration reducers for water-based drilling fluid in this study. The microspheres were synthesized by crosslinking reaction between β-CD and epichlorohydrin with inverse emulsion polymerization . The structural and morphological characteristics of the prepared microspheres were examined by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), particle size distribution measurement, and thermogravimetry analysis (TGA). The filtration control properties of the microsphere were evaluated via American Petroleum Institute (API) filtration test and high temperature and high pressure (HTHP) filtration test. The results indicated that β-CDP microspheres could effectively reduce the filtration of bentonite suspension both before and after thermal aging at 200 °C without significant influence on drilling fluid's rheology. A substantially enhanced filtration control behavior was observed after thermal aging, which was contrary with conventional filtration reducers. The β-CDP microspheres could absorb a large number of water and became swellable and deformable, which enhanced the compressibility of filter cake. What is more, hydrothermal reaction occurred for part of β-CDP microspheres under high temperature environment , resulting in the formation of numerous carbon spheres ranging from hundreds of nanometers to several micrometers. The β-CDP microspheres, bentonite particles and small carbon spheres in combination contributed to form a dense and compact filter cake with low permeability. β-CDP microspheres were potential candidates as environmental friendly and high temperature filtration reducers in deep well drilling.
研究领域:
材料科学
·
石油工程
✓ 已验证
DOI
高影响因子
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
·
2018
·
IF 2.382
Hanyi Zhong,Guangcheng Shen,Zhengsong Qiu,Yongxue Lin,Lijun Fan,Xiaodong Xing,Jia Li
Filtration control of drilling fluid plays an important role in the process of wellbore construction and ensures the success of drilling operation. A swellable polymer microsphere (SPM) of methylmethacrylate (MMA), butyl acrylate (BA), and lauryl methacrylate (LMA) was synthesized with suspension polymerization. Its swelling property was characterized by oil adsorption capacity measurement. First, the effect of SPM on the filtration and rheological properties of virgin organic clay dispersion was investigated. Then the filtration and rheological properties of mineral oil-based drilling fluid in the presence of SPM were elucidated under the respective conditions of hot aging temperature, oil to water ratio and density. Furthermore, the filtration control properties between SPM and two traditional filtration loss additives including modified lignite and asphaltic additive was compared. Addition of SPM exhibited obvious influence on the viscosity of oil-based drilling fluid especially at high concentration of 3 w/v%, therefore, a concentration of lower than 1.5 w/v% was recommended. After hot aging at 200 °C, the oil-based drilling fluid containing 1 w/v% SPM exhibited an API filtration loss decrease of 85%, and HTHP filtration loss decrease of 79% in comparison with the base fluid. After hot rolling at 180 °C, the API filtration loss decreased by 2%, 24% and 53%, and the HTHP filtration loss decreased by 42%, 54% and 65% respectively when 1 w/v% asphaltic additive, modified lignite and SPM are in the presence of the base fluid. Besides decreasing the filtration loss volume under high temperatures, incorporation of SPM also improves the filter cake quality of oil-based drilling fluid. SPM is capable of adsorbing considerable base oil and become swellable. The swellable polymer microspheres with favorably deformable and compressible properties can effectively fill the voids of filter cake and reduce the permeability, which leads to low filtration loss and minimization of solids invasion.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Dongjia Li,Haijun Chen,Xinyi Dai,Fuzhong Wu,Shuie Li,Yi Mai
LiNi0.5Mn1.5O4 (LNMO) has broad application prospects due to its high discharge platform and low cost. However, the side reactions of the electrolyte during high-temperature and high-voltage cycling severely limit its commercial development. In this study, PrF3 nanocoatings were constructed by wet chemistry to stabilize the surface of LNMO electrodes to solve such problems. The electrochemical test results show that the PrF3 nanocoating can effectively improve the electrochemical performance of the LNMO electrode, especially at high temperature. In the voltage range of 3.5–4.9 V, the 1 wt % PrF3-coated electrode exhibited a capacity retention of 91.4% after 100 cycles at a rate of 0.2C and 55 °C, while the pristine LNMO electrode could not release its capacity after 91 cycles. At a rate of 10C, the discharge capacity of pristine LNMO was only 48.2 mAh g–1, while that of LNMO-PF1 was 88.9 mAh g–1. The characterization of the samples before and after coating further indicates that the PrF3 nanocoating can stabilize the LNMO electrode surface, inhibit its side reactions with the electrolyte, enhance the structural stability, and improve the lithium ion diffusion kinetics. Our study provides an effective way to stabilize the energy density and cycling performance of LNMO at high temperature and high voltage and provides an idea for the protection strategy of high-energy-density lithium batteries working at high voltage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Jingyi Zhu,Yufeng Long,Nanxin Zheng,Zhaozhong Yang,Liangping Yi,Xiaogang Li,Hailong Chen
With oil and gas exploration continuing to progress, pseudo-gemini surfactants have gained widespread attention due to their superior performance. However, research on the suspension mechanism and key performance of scCO 2 foam constructed with pseudo-gemini surfactants under high temperature and pressure conditions remains lacking. To tackle this issue, an scCO 2 foam system was constructed based on pseudo-gemini surfactants. The testing methods such as interfacial characteristics, bulk rheology, dynamic light scattering (DLS), and cryogenic scanning electron microscopy (Cryo-SEM), the cooperative foam-stabilizing effect of sodium alcohol ether sulphate (AES) and oleic amidopropyl betaine (OAB) was studied, revealing the proppant suspension mechanism under high temperature and pressure conditions. Using this system as the working fluid for fracturing, its proppant suspension performance, as well as its potential for core matrix damage, was studied. The findings demonstrated that the pseudo-gemini surfactant formed in the mixed system exhibited better surface activity. The assembly parameter P = 0.487, obtained from interfacial parameter evaluation, suggested that micelles were self-assembled within the mixed system. Foam drainage experiments and rheological measurements showed that the wormlike micelles enhanced the elastic response of liquid film, preventing the deformation of foam liquid film, thereby extending the foam drainage half-life by 60 %. DLS and Cryo-SEM experiments verified that the OAB + AES system formed a robust micelle structure, improving the interference resistance of the liquid film. The OAB + AES system, facilitated by micelle formation, slowed down foam drainage and coarsening, slowed the reduction of Plateau borders, and maintained the nodes. Simultaneously, it reduced the impact of gas diffusion on the liquid film structure, improved the stability of spatial distribution of Plateau borders and nodes, increased the foam’s force on the proppants, delayed the settling of proppants. Additionally, under scCO 2 conditions, the proppant settling rate was 3.47 cm/min, meeting industry standards. The foam fracturing fluid exhibited an average reservoir damage rate of just 7.42 %, demonstrating good applicability to reservoirs. This study holds significant importance for advancing VES-scCO 2 foam fracturing fluids and expanding their applications in fracturing operations.
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xinrong Li,Yang Bai,Deng Gu,Jianing He,Qiang Hu,Zhongxiang Chen,Haibo Wang,Shahad Ali Badr,Lu Liu
In deep and ultra-deep wells, drilling fluids often experience increased filtration loss due to elevated temperatures and high salinity. To solve this problem, 5 g of N, N-dimethylacrylamide (DMAA), 13 g of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), 2 g of 4-acryloylmethiolane (ACMO), and 0.2 g of graphene oxide (GO) were polymerized through aqueous phase polymerization at 50°C for 2 h to form the Graphene oxide and DMAA, AMPS, ACMO Composites (GO-NAA). The synthesized nanocomposite, GO-NAA, was characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance, and thermogravimetric analysis to confirm its structure. The experimental results showed that under the conditions of 220°C and 15% NaCl, water-based drilling fluid (WBDF) containing 3% GO-NAA reduced the filtration value of the American Petroleum Institute(FLAPI) by 82.15% (from 76.2 to 13.6 ml) and the high-temperature and high-pressure filtration value (FLHTHP) by 88.50% (from 238.2 to 27.4 ml) compared to water-based drilling fluid without GO-NAA. Morphological analysis revealed that GO-NAA adhered to bentonite particles through hydrogen bonding and electrostatic interactions, promoting uniform dispersion of particles in the aqueous drilling fluid. This mechanism facilitated the formation of a thin and dense mud cake, which effectively minimized filtration loss. These findings quantitatively demonstrate the potential of GO-NAA as a temperature- and salt-resistant filtration loss reduction agent, offering significant performance improvements under extreme drilling conditions.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2024
·Vol. 10
·期 2
·120
·
IF 5
Jun Yang,Tengfei Dong,Jingtian Yi,Guancheng Jiang
This study addresses the performance challenges of Synthetic-Based Drilling Fluids (SBDF) in deep wells and high-temperature environments by engineering a novel multiple hydrogen-bonded crosslinked polymer, MBAH/nano-SiO2. Synthesized using methyl methacrylate (MMA), butyl methacrylate (BMA), acrylic acid (AA), N-hydroxyethyl acrylamide (HEAA), and nano-silica (nano-SiO2), the polymer improved crosslinking density, thermal properties, particle size distribution, and colloidal stability. The development of a ‘weak gel’ structure in W/O emulsions improved rheology and electrical stability (ES), with ES values reaching up to 775 V after aging at 180 °C. Moreover, the polymer’s amphiphilic structure and the synergistic effect of nano-SiO2increased emulsion film thickness and strength, further augmenting stability. The high-temperature and high-pressure filtration loss of SBDF was considerably reduced to 7.6 mL, benefiting well wall stability and reservoir damage control. This study provides crucial insights into optimizing multiple hydrogen-bonded crosslinked strategies and polymers in SBDF applications.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Jinshui Cheng,Zhao Hu,Kangle Lv,Xiaofeng Wu,Qin Li,Yuhan Li,Xiaofang Li,Jie Sun
As a typical metal-free layered organic semiconductor photocatalyst, carbon nitride suffers from low light harvesting ability and unsatisfied photocatalytic activity ascribed to insufficient optical absorption and strongly bound exciton. In this paper, we reported the fabrication of a well crystallized carbon nitride with superior visible-light-driven photoreactivity by simply polymerization of dicyandiamide in a closed stainless steel autoclave which is used to afford a high pressure reaction environment. High pressure induced polymerization of dicyandiamide not only prevents the emission of hazardous gas, improving the yield of carbon nitride, but also enhances the crystallization of carbon nitride. The 550 °C calcined sample at high pressure (HP550) extends the interplanar packing distance of layered carbon nitride from 0.676 nm to 0.697 nm while compacts the layered-stacking distance from 0.327 nm to 0.322 nm when compared its counterpart that was synthesized under other identical conditions but at normal pressure (NP550). HP550 exhibits the highest photocatalytic activity towards hydrogen production (772.40 umol −1 h −1 g −1 ) under visible light irradiation (λ ≥ 420 nm), which is 7.8 times higher than that of NP550. The drastic improved photocatalytic activity of carbon nitride prepared at high pressure was attributed to the negatively shifted position of conductor band potentials, increased visible-light absorption and efficient separation of charge carriers, benefiting from the reduced π–π layer stacking distance and breaking of intraplanar hydrogen bonds.
研究领域:
材料化学
·
光催化
·
半导体物理
·
纳米材料
·
能源化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）