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Surface lurking and interfacial ion release strategy for fabricating a superhydrophobic coating with scaling inhibition

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Petroleum Science 2022年第6期19卷 3068-3079页

作者： Ming-Liang Zhu Hui-Juan Qian Wei-Hao Fan Chi-Jia wang Rui-Xia yuan Qing-He Gao huai-yuan wang College of Chemistry and Chemical Engineering Northeast Petroleum UniversityDaqing163318China College of Chemical Engineering Daqing Normal UniversityDaqing163712China

The design and manufacture of anti-scaling surface is a prospective way to prevent scaling in oil *** this work,a novel superhydrophobic Cu^(2+)-loaded and DTPMPA-modified anodized copper oxide(S-Cu^(2+)/D-ACO)coating was fabricated by modification of 1H,1H,2H,*** valid storing of scale inhibitors at the coating surface and the interfacial release of Cu^(2+)ions contribute to enhancing the anti-scaling of the S-Cu^(2+)/D-ACO *** water contact angle of the S-Cu^(2+)/D-ACO coating is 163.03°and exhibits superhydrophobicity,which makes it difficult for CaCO_(3)to deposit at the surface of the *** will steadily lurk into the inner space,and Cu^(2+)will be loaded at the interface in the form of the DTPMPA:Cu^(2+)*** the deposition of CaCO_(3),the dynamic release of DTPMPA can be realized by transferring DTPMPA:Cu^(2+)to DTPMPA:Ca^(2+).Interestingly,the released Cu^(2+)hinders the active growth of CaCO_(3).After 48 h of scaling,the mass of CaCO_(3)scale at the S-Cu^(2+)/D-ACO coating surface is only 44.1%that of the anodized copper oxide *** excellent anti-scaling performance of the S-Cu^(2+)/D-ACO coating is determined by the synergistic effect of the DTPMPA lurking and dynamic release,as well as the Cu^(2+)inhibition at the interface of superhydrophobic coating and against CaCO_(3)*** research provides a new exploration for designing and fabricating anti-scaling superhydrophobic surface for oil field development.

关键词： Copper alloy DTPMPA lurking And dynamic release Cu^(2+)loading and chelating CaCO3 deposition Scale inhibition mechanism

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Preparation of PVA/GO/h-BN Janus Film with High Thermal Conductivity and Excellent Flexibility via a Density Deposition Self-assembly Method

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Chinese Journal of Polymer Science 2024年第8期42卷 1217-1226页

作者： Fang-Hua Luo Zhi-Tao Dong Guo-Hua Chen Chen Ma huai-yuan wang College of Chemistry and Chemical Engineering Northeast Petroleum UniversityDaqing 163318China College of Materials Science and Engineering Huaqiao UniversityXiamen 361000China School of Chemical Engineering and Technology and State Key Laboratory for Chemical Engineering Tianjin UniversityTianjin 300350China

Janus films with asymmetric physical/chemical properties have attracted con siderable attention due to their promising applications in personal thermal management,electronic skin s,sensors,actuators,***,traditional methods for fabricating Janus films conventionally need the assistance of an interface or auxiliary equipment,which are usually complex and ***,flexible poly(vinyl alcohol)(PVA)/graphene oxide(GO)/h-BN(recorded as PVA/GO/h-BN)Janus films with thermally,optically,and electrically anisotropic properties are fabricated by a simple density deposition self-assem bly method,which just utilizes the density difference between GO and h-BN during water *** results show that the two sides of the acquired Janus films have obvious asymmetric *** the original state of the PVA/GO/h-BN Janus films,the thermal conductivity of the GO side(10.06 W·m^(-1)·K^(-1))is generally lower than that of the h-BN side(10.48W·m^(-1)·K^(-1)).But after GO is reduced,the thermal conductivity of the rGO side reaches 12.17 W·m^(-1)·K^(-1),surpassing that of the h-BN *** addition,the relative reflectance of the h-BN side of Janus film is also significantly higher than that of the rGO side,and the su rface resistance difference between the two sides is about 4 orders of *** prepared PVA/GO/h-BN Janus films show great application potential in human thermal management,light conversion switches,and electronic *** study provides a simple and versatile strategy for fabricating Janus films with multifunctional(such as thermal,optical,and electrical)anisotropies.

关键词： Janus films PVA/GO/h-BN Density deposition self-assembly method

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Research on Improving the Thermal Conductivity of Epoxy Resin with Flexible Assisted Rigid Groups

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Chinese Journal of Polymer Science 2024年第11期42卷 1845-1854,I0015页

作者： Hong-Yu Zhu Yan-Ji Zhu Di Bao Lu-Chao Pei Fei Xu Zhe wang huai-yuan wang School of Materials Science and Engineering Tianjin UniversityTianjin300050China Collaborative Innovation Centre of Chemical Science and Engineering(Tianjin) Tianjin UniversityTianjin300072China Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology Tianjin UniversityTianjin300072China School of Chemical Engineering and Technology and State Key Laboratory for Chemical Engineering Tianjin UniversityTianjin300350China

Epoxy resins are cross-linked polymeric materials with typically low thermal ***,the introduction of rigid groups into epoxy resins is the main method to improve their intrinsic thermal *** researchers explored the relationship between the flexible chains of epoxy monomers and the thermal conductivity of the modified epoxy resins(MEP).The effect of flexible chain length on the introduction of rigid groups into the cross-linked structure of epoxy is worth investigating,which is of great significance for the improvement of thermal conductivity of polymers and related *** prepared a small molecule liquid crystal(SMLC)containing a long flexible chain via a simple synthesis reaction,and introduced rigid mesocrystalline units into the epoxy resin via a curing *** high-temperature curing,the introduced mesocrystalline units underwent orientational stacking and were immobilized within the *** and TGA tests showed that the ordering within the modified epoxy resin was increased,which improved the thermal conductivity of the epoxy ***,during the above process,the flexible chains of SMLC provide space for the biphenyl groups to align and therefore affect the thermal conductivity of the ***,the MEP-Ⅵcured with SMLC-Ⅵcontaining six carbon atoms in the flexible chain has the highest thermal conductivity of 0.40W·m^(-1)·K^(-1),which is 125%of the thermal conductivity of SMLC-IV of 0.32 W·m^(-1)·K^(-1),111%of the thermal conductivity of SMLC-Ⅷof 0.36W·m^(-1)·K^(-1),and 182%of the thermal conductivity of pure epoxy of 0.22 W·m^(-1)·K^(-1).The introduction of appropriate length flexible chains for SMLC promotes the stacking of rigid groups within the resin while reducing the occurrence of chain *** study will provide new ideas for the enhancement of thermal conductivity of cross-linked polymeric materials.

关键词： Epoxy Resin Polymer Thermal conductivity Rigid group Flexible chain

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EDTA interfacial chelation Ca^(2+) incorporates superhydrophobic coating for scaling inhibition of CaCO_(3) in petroleum industry

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Petroleum Science 2021年第3期18卷 951-961页

作者： Ming-Liang Zhu Hui-Juan Qian Rui-Xia yuan Dong-Yan Zhao Hai-Chao Huang huai-yuan wang College of Chemistry and Chemical Engineering Northeast Petroleum UniversityDaqing 163318China College of Chemical Engineering Daqing Normal UniversityDaqing 163712China Beijing Smart-Chip Microelectronics Technology Co. LtdBeijing 102200China

In this paper,the superhydrophobic poly(vinylidene fuoride)/fuorinated ethylene propylene/SiO_(2)/CNTs-EDTA(PFSCEDTA)composite coating was successfully fabricated and applied for anti-scaling *** deposition of CaCO_(3) on the surface of the superhydrophobic PFSC-EDTA composite coating reached 0.0444 mg/cm^(2) for 192-h immersion into the supersaturated CaCO_(3) solution,which was only 11.4%that of the superhydrophobic PFSC composite *** the interface between the CaCO_(3) solution and the PFSC-EDTA coating,the Ca^(2+)could be frstly chelated by EDTA that was beneft for improving the anti-scaling performance of the superhydrophobic PFSC-EDTA composite *** another hand,the addition of EDTA to the CNTs played an important role in fabricating the SiO_(2)-centric and CNTs-EDTA-surrounded multilevel micro-nanostructure in the superhydrophobic PFSC-EDTA composite coating,in favor of maintaining the air flm under the water and the stability of the superhydrophobic *** research supplies a new way of improving antiscaling performance of superhydrophobic coating by incorporating the organic chelating agent at the interface and changing the traditional way of scale prevention.

关键词： Anti-scaling Superhydrophobic coating EDTA Poly(vinylidene fuoride) Carbon nanotubes

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Prognostic analysis of patients with combined hepatocellularcholangiocarcinoma after radical resection:A retrospective multicenter cohort study

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World Journal of Gastroenterology 2022年第41期28卷 5968-5981页

作者： Ge Zhang Bo-Wen Chen Xiao-Bo Yang huai-yuan wang Xu Yang Fu-Cun Xie Xiang-Qi Chen Ling-Xiang Yu Jie Shi Yin-Ying Lu Hai-Tao Zhao Department of Liver Surgery State Key Laboratory of Complex Severe and Rare Diseases Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College 302 Clinical Medical School Peking University Senior Department of Hepatology The 5^(th) Medical Center of the PLA General Hospital Guangdong Key Laboratory of Epigenetics College of Life Sciences and Oceanography Shenzhen University Department of Pathology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College

BACKGROUND Combined hepatocellular-cholangiocarcinoma(cHCC-CCA)is a form of rare primary liver cancer that combines intrahepatic cholangiocarcinoma(ICC)and hepatocellular *** To investigate overall survival(OS)and recurrence-free survival(RFS)after radical resection in patients with cHCC-CCA,and the clinicopathological factors affecting prognosis in two center hospitals of *** We reviewed consecutive patients with cHCC-CCA who received radical resection between January 2005 and September 2021 at Peking Union Medical College and the 5th Medical Center of the PLA General Hospital *** follow-up and clinicopathological characteristics were systematic collected for baseline and prognostic *** Our study included 95 patients who received radical *** majority of these patients were male and 82.7%of these patients were infected with *** mean tumor size was 4.5 cm,and approximately 40%of patients had more than one *** median OS was 26.8(95%CI:18.5-43.0)mo,and the median RFS was 7.27(95%CI:5.83-10.3)*** predictors of OS were CA19-9≥37 U/mL(HR=8.68,P=0.002),Child-Pugh score>5(HR=5.52,P=0.027),tumor number>1(HR=30.85,P=0.002),tumor size and transarterial chemoembolization(TACE)after surgery(HR=0.2,P=0.005).CONCLUSION The overall postoperative survival of cHCC-CCA patients is poor,and most patients experience relapse within a short period of time after *** tumor biomarker(CA19-9,alphafetoprotein)levels,tumor size,and Child-Pugh score can significantly affect *** TACE after surgery prolongs RFS,suggesting that TACE is a possible option for postoperative adjuvant therapy in patients with cHCC-CCA.

关键词： Combined hepatocellular-cholangiocarcinoma Radical resection Clinicopathological factor Integrated nomogram Multicenter cohort

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一种不确定数据流子空间聚类算法

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信息技术 2014年第2期38卷 27-30页

作者：徐亚霍欢奚金金袁怀旺上海理工大学光电信息与计算机学院上海200093

提出了基于滑动窗口的不确定数据流子空间聚类算法USSC,它应用采样时加权值的方法来选择初始化聚类中心点,采用滑动窗口SW缓存一段时间的元组作为聚类对象,并提出一种新的离群点处理机制来排除离群点O p。为适应不确定数据流元组不确定... 详细信息

提出了基于滑动窗口的不确定数据流子空间聚类算法USSC,它应用采样时加权值的方法来选择初始化聚类中心点,采用滑动窗口SW缓存一段时间的元组作为聚类对象,并提出一种新的离群点处理机制来排除离群点O p。为适应不确定数据流元组不确定特性,该算法使用基于隶属度的非分割聚类方法来确定一个元组只能划分到一个簇中。试验结果表明,USSC算法与同类型的算法相比有较好的聚类效果和较快的聚类速度,而且其自身拥有很强的可伸缩性。

关键词：不确定数据流聚类子空间滑动窗口

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Phase transition of the frustrated antiferromagntic J1-J2-J3 spin-1/2 Heisenberg model on a simple cubic lattice

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Frontiers of physics 2019年第1期14卷 137-146页

作者： Ai-yuan Hu huai-Yu wang College of Physics and Electronic Engineering Chongqing Normal University Chongqing 401331 China Department of Physics Tsinghua University Beijing 100084 China

We have comprehensively investigated the frustrated J1-J2-J3 Heisenberg model on a simple cubic lattice. This model allows three regimes of magnetic order, viz., (π;π;π), (0;π;π) and (0;0;π), denoted as AF1, AF2, and AF3, respectively. The effects of the interplay of neighboring couplings on the model are studied in the entire temperature range. The zero temperature magnetic properties of this model are discussed utilizing the linear spin wave (LSW) theory, nonlinear spin wave (NLSW) theory, and Green’s function (GF) method. The zero temperature phase diagrams evaluated by the LSW and NLSW methods are illustrated, and are observed to exhibit different parameter boundaries. In certain regions and along the parameter boundaries, the possible phase transformations driven by the parameters are discussed. The results obtained using the LSW, NLSW, and GF methods are compared with those obtained using the series expansion (SE) method, and are observed to be in good agreement when the value of J2 is not close to the parameter boundaries. The ground state energies obtained using the LSW and NLSW methods are close to that obtained using the SE method. At finite temperatures, only the GF method is employed to evaluate the magnetic properties, and the calculated phase diagram is observed to be identical to the classical phase diagram. The results indicate that at the parameter boundaries, a temperature-driven first-order phase transition between AF1 and AF2 may occur along the boundary line. Along the AF1-AF3 and AF2-AF3 boundary lines, AF3 is less stable than AF1 and AF2. Our calculated critical temperature agrees with that obtained using Monte Carlo simulations and pseudofermion functional renormalization group scheme.

关键词： quantized spin models quantum phase transitions antiferromagnetics

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An image encryption algorithm based on improved baker transformation and chaotic S-box

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Chinese Physics B 2021年第6期30卷 216-225页

作者： Xing-yuan wang huai-huai Sun Hao Gao School of Information Science and Technology Dalian Maritime UniversityDalian 116026China

The algorithm is an image encryption algorithm based on the improved baker transformation and chaotic substitution box(S-box). It mainly uses the initial values and parameters of a one-dimensional logistic chaotic system as an encryption key. Specifically, in the image scrambling stage, the algorithm primarily uses an improved baker transform method to process the image. In the image diffusion stage, the algorithm first uses the chaotic S-box method to process the encryption key. Secondly, an exclusive OR(XOR) operation is performed on the image and the encryption key to initially diffuse the image. Finally, the image is again diffused using the method of ortho XOR. Simulation analysis shows that the algorithm can achieve good encryption effect, simple and easy implementation, and good security. In the digital image communication transmission, it has good practical value.

关键词： image encryption improved baker transformation chaotic S-box chaotic sequence

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Quasiparticle scattering interference in the renormaUzed Hubbard model

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Frontiers of physics 2015年第1期10卷 111-117页

作者： Shu-Hua wang huai-Song Zhao Feng yuan College of Physics Qingdao University Qingdao 266071 China

In this paper, we study the quasiparticle scattering interference phenomenon in the presence of a single impurity within the renormalized Hubbard model. By calculating the energy and momentum dependence of the Fourier-transformed local density of states in the full Brillouin zone, we can qualitatively describe the main features of the quasiparticle scattering interference phenomenon in cuprate superconductors using a single point-like impurity. In particular, we show that with increasing energy, the position of the peak along the nodal （[0, 0] → [π, π]） direction moves steadily to a large momentum region, while the position of the peak along the antinodal （[0, 0] → [π, 0]） direction moves toward the center of the Brillouin zone.

关键词： impurity renormalized Hubbard model local density of states Gutzwillerapproximation

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Water and salt movement in different soil textures under various negative irrigating pressures

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Journal of Integrative Agriculture 2016年第8期15卷 1874-1882页

作者： wang Jia-jia HUANG yuan-fang LONG huai-yu Department of Soil and Water Sciences College of Resources and Environmental Sciences China Agricultural University/Key Laboratory of Arable Land Conservation (North China) Minstry of Agriculture/Key Laboratory of Agricultural Land Quality Monitoring Ministry of Land and Resources Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

supported by the National High-Tech R＆D Program of China （2013AA102901）

关键词： negative pressure irrigation volumetric water content soil salt content soil texture

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