A5100702882- Lignin and Wood Chemistry
- Cellular and Composite Structures
- Thermochemical Biomass Conversion Processes
- Advanced Cellulose Research Studies
- Catalysis and Hydrodesulfurization Studies
- Mechanical Behavior of Composites
- Natural Fiber Reinforced Composites
- Material Properties and Processing
- 3D Printing in Biomedical Research
- Gastrointestinal Bleeding Diagnosis and Treatment
- Advanced Sensor and Energy Harvesting Materials
- Clinical Nutrition and Gastroenterology
- Catalysis for Biomass Conversion
- Advanced Materials and Mechanics
- Nanomaterials for catalytic reactions
- Wood Treatment and Properties
- Innovative Energy Harvesting Technologies
- Structural Analysis of Composite Materials
- Biofuel production and bioconversion
- Enzyme-mediated dye degradation
- Polymer composites and self-healing
- Flame retardant materials and properties
- Gastrointestinal disorders and treatments
- Parvovirus B19 Infection Studies
- Carbon Dioxide Capture Technologies
State Forestry and Grassland Administration
2022-2024
First Affiliated Hospital of Zhengzhou University
2024
Washington University in St. Louis
2022
Texas A&M University
2021-2022
Texas A&M University System
2021-2022
Nanjing University of Science and Technology
2020-2022
Forest Products Laboratory
2013-2021
US Forest Service
2017-2021
College Station Medical Center
2021
Guangzhou University
2021
A series of mechanically strong and fully biobased carboxymethyl cellulose (CMC)/cellulose nanofibril (CNF) hybrid aerogels were produced <italic>via</italic> an environmentally friendly unidirectional freeze-drying process.
Kraft lignin (KL) was thermally treated at 500 to 1000 °C in an inert atmosphere. Carbon nanostructure parameters of KL terms amorphous carbon fraction, aromaticity, and nanocrystallites lateral size (La), thickness (Lc), interlayer space (d002) were analyzed quantitatively using X-ray diffraction, Raman spectroscopy, high-resolution transmission electron microscopy. Experimental results indicated that increasing temperature reduced but increased aromaticity materials. The Lc value materials...
Carbon foams have been prepared using Kraft lignin as the solely resource. No catalysts, foaming/blowing agents, surfactants, and/or crosslinking agents are used for foam preparation. The process includes pressing carbon precursors into molds followed by formation of through heating and carbonization/graphitization derived foams. resultant (LCF) has an open-cell structure with densities ranging from about 0.18 g/cm3 to 0.68 g/cm3. compressive strengths LCFs increase increasing bulk density,...
Lignin from different biomass feedstock has been explored to make quality carbon fiber. The mechanistic study revealed the <italic>β-O</italic>-4 linkages of lignin linearly correlated both mechanical and electroconductive performance fibers.
Abstract Low-cost flexible microwave circuits with compact size and light weight are highly desirable for wireless communication other miniaturized systems. However, the prevalent studies on electronics have only focused individual elements such as transistors, inductors, capacitors, transmission lines. Thinning down supporting substrate of rigid chip-based monolithic integrated has been approach toward circuits. Here, we report a circuit strategy integrating membrane AlGaN/GaN high electron...
Multilayer graphene-encapsulated iron nanoparticles in carbon frames were prepared through catalytic graphitization of kraft lignin as sources using irons the catalyst at temperature 1000°C under argon atmosphere. The effects different loadings on formation multilayer investigated thermogravimetric analysis and temperature-programmed decomposition. evolution gaseous products (H 2 , CH 4 CO, CO ) was measured an online mass spectroscopy during thermal decomposition lignin. Solid characterized...
We report the preparation of carbon-based nanomaterials from biopolymer kraft lignin via an iron catalytic thermal treatment process. Both carbonaceous gases and amorphous carbon (AC) decomposition were found to have participated in formation graphitic-carbon-encapsulated nanoparticles (GCEINs). GCEINs originating thick-walled graphitic-carbon layers (10 50) form at a temperature 700 °C. By contrast, AC usually thin-walled (1 3) least 800 Iron catalyst started their phase transition α-Fe...
Abstract The static and fatigue bending behavior of wood-fiber-based tri-axial engineered sandwich composite panels (ESCP) has been investigated by four-point tests. Fatigue weakened (wESCP) with an initial interface defect were manufactured for the Stress σ vs. number cycles curves (S-N) recorded under different stress levels. primary failure mode in tests was observed shear zone (epoxy debonding), which from face pure test. For residual (RB) test, epoxy debonding occurred between zone....
Effects of physical and chemical states iron-based catalysts on the formation carbon-encapsulated iron nanoparticles (CEINs) synthesized thermally from kraft lignin were investigated. Experimental results indicated that if solution-based nitrate (FeN) was used as an source for catalyst, CEINs observed α-Fe γ-Fe-based cores encapsulated by few layers graphitic-carbon (mostly 1–5 layers) majority these embedded in amorphous carbon matrix. The shells is believed based dissolution precipitation...
The behaviors of thermal decomposition kraft lignin under three different gases (Ar, CO₂, or H₂) were analyzed and compared using a temperature-programmed decomposition-mass spectrometry (TPD-MS) system. Experimental results indicated that Ar atmosphere produced the highest yield solid chars, while H₂ generated liquids CO₂ had gases. TPD-MS showed was consumed at temperature range from 205 to 810 °C 185 1000 °C. promoted cleavage side chains significantly enhanced formation CH₄, C₆H₆, HCHO,...
Kraft lignin was catalytically graphitized to graphene-based nanostructures at 1000 °C under argon atmosphere with four iron catalysts, iron(III) nitrate (Fe-N); iron(II) chloride (Fe-Cl₂); (Fe-Cl₃); and sulfate (Fe-S). The catalytic decomposition process of iron-promoted materials examined using thermalgravimetric analysis temperature-programmed methods. crystal structure, morphology surface area produced were characterized by means X-ray diffraction, Raman, scanning electron microscopy,...
Mechanical analysis is presented for new high-strength sandwich panels made from wood-based phenolic impregnated laminated paper assembled with an interlocking tri-axial ribbed core.Four different panel configurations were tested, including fiberglass fabric bonded to both outside faces self-expanding urethane foam used fill the core.The mechanical behaviors of strength tested via flatwise compression, edgewise and third-point load bending.Panels exhibited significantly increased apparent...
This paper presents a simplified analytical model and balanced design approach for modeling light-weight wood-based structural panels in bending. Because many parameters are required to input the of finite element analysis (FEA) during preliminary process optimization, equivalent method was developed analyze mechanical performance based on experimental results. The bending deflection, normal strain shear with various configurations were investigated using four point test. results from...
Abstract The accumulation of non‐degradable petrochemical plastics imposes a significant threat to the environment and ecosystems. We addressed this challenge by designing new type phototunable based on unique lignin chemistry enable readily end‐life recycling. advanced material design leveraged efficient photocatalytic depolymerization ZnO nanoparticles build lignin‐polymethyl methacrylate (PMMA)‐ZnO blends. first demonstrated highly effective in complex polymer blend matrix explored...