A5101039545- Petroleum Processing and Analysis
- Enhanced Oil Recovery Techniques
- Hydrocarbon exploration and reservoir analysis
- Lubricants and Their Additives
- Robot Manipulation and Learning
- Advanced Photocatalysis Techniques
- Advanced Polymer Synthesis and Characterization
- Rheology and Fluid Dynamics Studies
- Advanced oxidation water treatment
- Minerals Flotation and Separation Techniques
- Surfactants and Colloidal Systems
- TiO2 Photocatalysis and Solar Cells
- Tactile and Sensory Interactions
- Coagulation and Flocculation Studies
- Calcium Carbonate Crystallization and Inhibition
- Muscle activation and electromyography studies
- Polymer crystallization and properties
- Membrane Separation Technologies
- Industrial Vision Systems and Defect Detection
- Dendrimers and Hyperbranched Polymers
- Polymer Science and PVC
- Membrane-based Ion Separation Techniques
- Infrastructure Maintenance and Monitoring
- Catalytic Processes in Materials Science
- Water Quality Monitoring and Analysis
Northeast Petroleum University
2016-2025
Zhejiang University
2023-2024
Xi'an Jiaotong University
2024
State Key Laboratory of Electrical Insulation and Power Equipment
2024
Daqing Oilfield General Hospital
2023
China University of Geosciences (Beijing)
2015-2017
Nanohybrid pour-point depressants (PPDs) were prepared by organically modified nano-SiO2 in copolymers of ethylene and vinyl acetate (EVA) with various contents. The effects nanohybrid PPDs on the cold-flow properties 25 wt % wax model oil evaluated. crystallization behavior crystal morphology at low temperatures also observed using polarized optical microscopy. results indicated that co-crystallization dispersion EVA crystals are key factors determining heterogeneous nucleation effect PPDs....
The nanocomposite EVAL-CNT was produced by chemical grafting in the solution system through esterification of ethylene-vinyl alcohol copolymer (EVAL) and carboxylated multi-walled carbon nanotubes (O-MWCNT), its structural properties were characterized. improvement rheological waxy oil novel pour point depressant investigated using macroscopic measurements microscopic observations. results showed that (PPD) could significantly reduce improve low temperature fluidity crude had better...
Bimanual dexterous manipulation remains significant challenges in robotics due to the high DoFs of each hand and their coordination. Existing single-hand techniques often leverage human demonstrations guide RL methods but fail generalize complex bimanual tasks involving multiple sub-skills. In this paper, we introduce VTAO-BiManip, a novel framework that combines visual-tactile-action pretraining with object understanding facilitate curriculum enable human-like manipulation. We improve prior...
Nanocomposite pour point depressants (PPDs) provide a new way to further improve the fluidity of waxy crude oil at low temperatures, which has important application values in pipeline transportation. In this work, effect ethylene-vinyl acetate (EVA) doped with magnetic spherical nanoparticles Fe3O4 (30 nm) on morphology wax crystals and flow behavior Daqing was investigated by polarized optical microscopy rheological testing. The results showed that, compared EVA PPD nano-SiO2 (with same...
The nano-hybrid pour-point depressant (PPD) was prepared with organically modified nano-silica covering in EVA. effects of nano-silica/EVA on the flow behavior and wax crystallization model oils different contents were evaluated. Compared pure EVA nano-silica/EVA, exhibited a better effect, when doped 500 ppm, pour point oil containing 20 wt% reduced from 33°C to 0°C. However, it is noteworthy that cannot accurately reflect effect YSiO2/EVA as cold improver for high content. crystal...
Nanocomposites of attapulgite (ATT)/ethylene vinyl acetate copolymer (EVA) were prepared with organically modified ATT covering in EVA. Organically was using KH550 and organic acid. The effect nano-hybrid on the flow behavior model oil containing 15 wt% wax evaluated. crystallization crystal morphology at low temperature observed by polarizing optical microscopy (POM). results indicated that long-chain acid-modified exhibited a better compared short-chain ATT, pure In addition, it is...
Modified ethylene-vinyl acetate copolymer (EVAM) and amino-functionalized nano-silica (NSiO2) particles were employed as the base materials for synthesis of nanocomposite pour point depressant designated EVAM-g-NSiO2. This involved a chemical grafting process within solution system, followed by structural characterization. Moreover, combining macro-rheological performance with microscopic structure observation, influence on rheological properties model waxy oil system was investigated. The...
Robotic dexterous grasping is a challenging problem due to the high degree of freedom (DoF) and complex contacts multi-fingered robotic hands. Existing deep re-inforcement learning (DRL) based methods leverage human demonstrations reduce sample complexity dimensional action space with grasping. However, less attention has been paid hand-object interaction representations for high-level generalization. In this paper, we propose novel geometric spatial representation, named DexRep, capture...
In this paper, the organic nano-sepiolite was modified to obtain highly dispersibility in oil phase, and then, EVA (ethylene-vinyl acetate)/nano-sepiolite prepared by melt blending. The effects of un-doped/doped different NPPDs samples on pour point, gel viscosity, yield value Daqing crude were evaluated. changes wax crystal morphology at low temperature observed polarizing optical microscopy (POM). results show that due heterogeneous nucleation mechanism high dispersion EVA/nano-sepiolite...
Differences in the synthesis methods can affect performance of nanocomposite materials. The SiO2-based pour point depressants synthesized by chemical hybrid are mostly situ polymerization and grafting. However, there still some gaps nanocomposites using In this paper, amino-modified Nano-SiO2 octamethyl methacrylate-maleic anhydride copolymer was used to prepare PM18-g-NSiO2 an amidation reaction, product compared with PM18/SiO2 prepared solution blending method. characterization results...
Introduction: Crude oil is a complex mixture consisting of different hydrocarbons such as resins, asphaltenes, aromatics and paraffins. Wax deposition in pipelines considered to be one the most serious flow assurance problems. Method: In order obtain pour point depressant with better effect on Daqing waxy crude oil, model containing paraffin was investigated. Polyoctadecyl acrylate prepared by taking polymerization octadecyl monomer under corresponding reaction conditions. The viscosity were...
Chemical pour point depressant modification is an important means to reduce and viscosity of waxy crude oil. In recent years, the research on depressants has made a great progress. This paper summarizes types novel nano-pour depressants, preparation methods, evaluation mechanism action influencing factors. The development future outlook brief summary.
This article mainly describes the advantages of nano-pour point depressants on low-temperature fluidity crude oil compared with traditional pour depressants. The common are divided blend type and polymerization type. It can effectively improve wax crystal structure strength, thereby improving oil. Nano-particles have better application prospects in rheological properties waxy
Low-density polyethylene (LDPE) was modified with 2-hydroxyethyl acrylate (HEA) by a swollen phase grafting method azobisiso-butyronitrile (AIBN) as initiator and xylene swelling agent. Fourier transform infrared spectroscopy (FTIR) 1H-nuclear magnetic resonance (1H-NMR) showed that the HEA grafted onto PE molecular chains copolymer (LDPE-g-PHEA) formed. The rheological data illustrated content of long chain branches (LCB) in LDPE-g-PHEA higher than LDPE. Melt flow index (MFI) measurements...