Kaixu Song

Beijing Institute of Technology

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Chuanyu Jin

Liaocheng University

Zhao‐Yan Sun

State Key Laboratory of Polymer Physics and Chemistry

Lijia An

State Key Laboratory of Polymer Physics and Chemistry

Peter Senior

University of Alberta

Xiyue Wang

Jilin University of Chemical Technology

Mark Ballard

Insmed (United States)

Miguel Rondón

Industrial University of Santander

Stan McCool

University of Kansas

Zhimao Li

Beijing Institute of Technology

Jiaqi Liu

Guiyang Medical University

Cooperative Institutions

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Liaocheng University

State Key Laboratory of Polymer Physics and Chemistry

Changchun Institute of Applied Chemistry

Beijing Institute of Technology

Jilin University

State Council of the People's Republic of China

Changchun University of Science and Technology

University of Science and Technology of China

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Cellulose nanofibers-based composite film with broadening MXene layer spacing and rapid moisture separation for humidity sensing and humidity actuators

International Journal of Biological Macromolecules (2024)

Zhimao Li Wenjing Xu Kaixu Song Jing Zhang Qi Liu

Based on the basic idea of expanding the interlayer spacing of MXene, utilizing the effect of gallic acid-modified cellulose nanofibers for rapid moisture separation, the flexible sensing and driving composite film with a perfect balance among humidity signal response and mechanical properties was prepared. Inspired by the stacking of autumn fallen leaves, the cellulose nanofibers-based composite films were formed by self-assembly under vacuum filtration of blending gallic acid-modified cellulose nanofibers with MXene. The enhanced mechanical properties (tensile strength 131.1 MPa, puncture load 0.88 N, tearing strength 165.55 N/mm, and elongation at break 16.14 %), humidity sensing (the stable induced voltage 63.7 mV and response/recovery time 3.2/5.1 s), and humidity driving (154.7° bending angle) properties were observed. The synergistic effect of hydrogen bonds, the "pinning effect" arising from the side chains, and the hierarchical layered microstructure contributed to the enhanced performance. This work exemplifies the application of green natural product for preparing intelligent sensing, wearable devices, and biomimetic robots.

10.1016/j.ijbiomac.2024.134383

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Citations (20)

Lattice Boltzmann study of hydrodynamic effects in lamellar ordering process of two-dimensional quenched block copolymers

The Journal of Chemical Physics (2008)

Kaixu Song Yuxi Jia Zhao‐Yan Sun Lijia An

By incorporating self-consistent field theory with lattice Boltzmann method, a model for polymer melts is proposed. Compared with models based on Ginzburg-Landau free energy, our model does not employ phenomenological free energies to describe systems and can consider the chain topological details of polymers. We use this model to study the effects of hydrodynamic interactions on the dynamics of microphase separation for block copolymers. In the early stage of phase separation, an exponential growth predicted by Cahn-Hilliard treatment is found. Simulation results also show that the effect of hydrodynamic interactions can be neglected in the early stage. For the late stage of phase separation, it is easy to see the effects of hydrodynamic interactions on the ordering process of lamellae phase. From the analysis of structure factor curves, we find that the growth of domains is faster if hydrodynamic interactions are introduced. Furthermore, the scaling of the pattern dynamics is investigated for the late stage at zero thermal noise. By studying the behavior of scaling exponents of the structure factor and the nematic order-parameter correlation function C(nn), we can see that the effects of hydrodynamic interactions lead to bigger growth exponent for both functions.

Structure factor

Exponent

Lattice Boltzmann methods

Lattice model (finance)

Spinodal decomposition

Lattice (music)

10.1063/1.2981804

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Citations (11)

Bridging the Gap between Chemical Flooding and Independent Oil Producers

Stan McCool Tony Walton Paul Whillhite Mark Ballard Miguel Rondón

Ten Kanas oil reservoirs/leases were studied through geological and engineering analysis to assess the potential performance of chemical flooding to recover oil. Reservoirs/leases that have been efficiently waterflooded have the highest performance potential for chemical flooding. Laboratory work to identify efficient chemical systems and to test the oil recovery performance of the systems was the major effort of the project. Efficient chemical systems were identified for crude oils from nine of the reservoirs/leases. Oil recovery performance of the identified chemical systems in Berea sandstone rocks showed 90+ % recoveries of waterflood residual oil for seven crude oils. Oil recoveries increased with the amount of chemical injected. Recoveries were less in Indiana limestone cores. One formulation recovered 80% of the tertiary oil in the limestone rock. Geological studies for nine of the oil reservoirs are presented. Pleasant Prairie, Trembley, Vinland and Stewart Oilfields in Kansas were the most favorable of the studied reservoirs for a pilot chemical flood from geological considerations. Computer simulations of the performance of a laboratory coreflood were used to predict a field application of chemical flooding for the Trembley Oilfield. Estimates of field applications indicated chemical flooding is an economically viable technology for oil recovery.

Residual oil

Oil in place

10.2172/1053788

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Citations (1)

Defect evolution and hydrodynamic effects in lamellar ordering process of two-dimensional quenched block copolymers

The Journal of Chemical Physics (2009)

Kaixu Song Zhao‐Yan Sun Lijia An

The effects of hydrodynamic interactions on the lamellar ordering process for two-dimensional quenched block copolymers in the presence of extended defects and the topological defect evolutions in lamellar ordering process are numerically investigated by means of a model based on lattice Boltzmann method and self-consistent field theory. By observing the evolution of the average size of domains, it is found that the domain growth is faster with stronger hydrodynamic effects. The morphological patterns formed also appear different. To study the defect evolution, a defect density is defined and is used to explore the defect evolutions in lamellar ordering process. Our simulation results show that the hydrodynamics effects can reduce the density of defects. With our model, the relations between the Flory–Huggins interaction parameter χ, the length of the polymer chains N, and the defect evolutions are studied. It is found that χN is an important parameter for defect evolutions. Furthermore, the evolution behavior of the defect densities and the average size of domains are compared and the differences are discussed.

Lattice Boltzmann methods

Topological defect

Lattice (music)

10.1063/1.3090483

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Citations (4)

Corrigendum to “Nano-sized flexible hollow carbon buffer layer improves capacitance of micro-nano NiS2/C electrode in supercapacitors” [Journal of Energy Storage 36 (2021) 102394]

Journal of Energy Storage (2021)

Caiping Xu Chuanyu Jin Jiaqi Liu Kaixu Song Xiyue Wang

Buffer (optical fiber)

Carbon fibers

10.1016/j.est.2021.102451