Papers by Author: Fei Wang

Abstract: Synthetic nanomaterials have the disadvantages of large-scale investment, high energy consumption, complex production process and heavy environmental load. Mineral nanomaterials such as sepiolite group mineral nanomaterials are characterized by small size effect, quantum size effect and surface effect. Water treatment application of sepiolite group mineral nanomaterials has become an active research area and showed good development and application prospects. Based on the above reasons, this paper systematically summarizes the water treatment application of sepiolite group mineral nanomaterials, and development trend related to water treatment application of sepiolite group mineral nanomaterials were also proposed.

Abstract: Sepiolite mineral nanofibers are typical porous materials widely existing in nature and have many nanometer level micropore and mesopore, which could play an active role in many fields such as thermal insulation functional additive for composite materials. Based on the above reason, this paper briefly summarized the research progress of microstructure of sepiolite mineral nanofibers, and research orientations related to microstructure of sepiolite mineral nanofibers were also proposed.

Abstract: In the paper, the experimental teaching is adopted to the inorganic material specialty English to promote the English comprehensive ability and professional skills of students. The experiment is to prepare sepiolite nanofibers by means of the microwave chemical method using natural sepiolite samples as raw materials. Through the experiment, the English practical ability and skills of students are developed.

Abstract: In order to use sepiolite nanofibers as rubber fillers, the hydrophilic character of sepiolite nanofibers should be modified by grafting organic group and controlling surface energy and proportion of dispersive interaction for improving compatibility of sepiolite nanofibers in rubber matrix. The surface energies of sepiolite nanofibers were measured by several liquids which were different on surface energy and polar interaction and calculated by Wus equation. The results showed that the mechanical properties can be improved after reinforcement by modified sepiolite nanofibers.

Abstract: Antibacterial composite materials were prepared by water as dispersing media, styrene acrylic emulsion as basic material, sepiolite nanofibers and germifuga as main functional additives. The antibacterial effect and mechanism were also systematically studied by means of antibacterial effect testing. The results show that the antibacterial effect was best when the proportion of germifuga and sepiolite nanofibers was 4% and 5%, respectively. The composite materials could restrict the bacteria growth effectively.

Abstract: Polypropylene nanocomposites were prepared by means of melt mixing using attapulgite as inorganic components. The relation between surface free energy and mechanical properties of polypropylene nanocomposites and elasticized mechanism analysis of modified attapulgite nanofibers were mainly studied. The results showed that the modulus, fracture strength, fracture extensibility, tensile strength, yield strength, bend strength, flexural modulus and dynamic ductility properties of nanocomposites all enhanced obviously after modified attapulgite nanofibers were filled up. Surface free energy of attapulgite nanofibers and impact toughness properties of nanocomposites were in approximate inversely-proportion quadratic function relationship, which could provide a new way of thinking in the field of nanocomposites research.

Abstract: The radiant thermal insulation coating is prepared by tourmaline and hollow glass bead as main functional additives. The thermal insulation property is evaluated by thermal insulation effect and far infrared emissivity. The results show that the optimum contents of functional additives are as follows: hollow glass bead 4%, tourmaline particle 8%. The integral mean of far infrared emissivity and thermal insulation effect of radiant thermal insulation coating are improved by 3.812% and 6.66°C, respectively. The mechanism of thermal insulation is that the structure of hollow glass bead generates scattering and multiple reflections of solar radiation, and then tourmaline particle and the oxides of hollow glass bead radiate the absorbed heat from coating to atmosphere.

Abstract: Rigid polyurethane foam has many advantages such as low thermal conductivity, good thermal insulation, good antisepsis ability, non-toxic, and light quality. Based on the above reasons, this paper systematically summarized the processing technologies of rigid polyurethane foam, and research progress of its reinforced technology by inorganic materials was briefly discussed.

Abstract: Research progress of preparation methods of nanofibers was briefly reviewed and discussed based on the classification of two component composite method, template synthesis method, polymer limited domain synthesis method, and electrospinning method. Research orientations related to preparation methods of nanofibers were also proposed.

Abstract: Rigid polyurethane foams were prepared using sepiolite nanofibers as main functional fillers. The effect of sepiolite nanofibers on the properties of polyurethane foams was studied systematically. Through characterization by scanning electron microscope, X-ray diffraction and property test, it was found that the thermal insulation effect can be maintained, and the mechanical properties can be improved due to the good interfacial bond between sepiolite nanofibers and rigid polyurethane foams.