Papers by Author: Zhi Li Zhong

Abstract: In order to reduce vehicle crash on highway, basalt fiber reinforced guardrail was developed in this study. The wave shaped framework was coated with thermoplastic acrylic resin, using injection molding machine. Tensile strengths of the samples were tested by a 3380Instron and the corresponding property of the composite was calculated on the basis of the composite mechanics. The results indicated that the basalt filament reinforced highway guardrail have the advantages of high strength, excellent corrosion resistance, relative low cost and so on.

Abstract: The article explored the finishing process of cotton fabric with nano titanium dioxide and adopted the dipping-rolling-drying process for the purpose of cotton fabric with good ultraviolet (UV) resistant performance. In this study, the concentration of titanium dioxide acted as variable factor to test and analysis the regular pattern of fabric UV resistant performance, mechanical properties and wearability after being treated with different concentrations of titanium dioxide solution. The results showed that the property of UV resistance improved with the increase of solution concentration. The ultraviolet protection factors (UPF) of fabric was 43.5 at a concentration of 0.5%, which was beyond the UV resistant standard of 40. However, the mechanical properties and wearability decreased in varying degrees with the increase in concentration of titanium dioxide. Thus the overall performance should be considered comprehensively to select the finishing process. All of these conclusions provide basic data for some in-depth research in the future.

Abstract: Fire retardant performance is an important indicator of fire-resistant fabric, and a major part of fabric protective properties, which has a great relationship with raw materials and weaving processing parameters of weaving. In this paper, basalt fiber were used to make fire-resistant fabric due to the superior properties of heat resistance, anti-oxidation, radiation, insulation of noisy and heat, filtration and high compression strength and shear strength. The fabrics of different weaves were produced on a sample loom. Then the properties, such as abrasion durability, fire resistance, reaction to acid and alkali were measured for evaluation. The results revealed that basalt fiber has great advantages for producing fire-resistant fabric.

Abstract: Polypropylene fibers were dyed with Disperse dyes Blue 2B in Supercritical Carbon Dioxide at different temperature, pressure and time. The K/S value were determined and the effect of as temperature, pressure and dyeing time on the dyeing behaviours of disperse dyes on Polypropylene fibers were discussed. It was found that with the increase of dyeing temperature and pressure, the K/S value increased gradually, and dyeing effect was best after the fiber was dyed at 120 °C, 28 MPa for 20 min.

Abstract: Compared to other spinning system, the ring spinning process has been used to produce higher quality yarns, but with a much lower spinning efficiency, resulted from the relatively high spinning tension that leads to increased yarn breakage rates and makes high power consumption. Thus, depressing yarn tension is essential to change the status. In this paper, we design a movable balloon controller system to reduce yarn tension. The system is automatic, composed of powder switch, touch screen, PLC (Programmable Logic Controller), pulling-thread displacement sensor, controller of step motor, step motor and linear module. PLC, the core of the system, controls the position of the balloon controller by a series of programs. Then yarn tension was tested while spinning with movable balloon control ring, fixed balloon control ring and no balloon control ring, respectively. The result shows that the yarn tension can be depressed indeed by equipping this movable balloon controller system to some extent. Additionally, we find that the number of hairiness of ring spun yarns with this system can be reduced to some extent, while yarn tensile properties are not as sensitive to be worse. It is significant to cut down ends-down rate, improve the quality of ring spun yarns, the spinning efficiency as well as the energy efficiency of ring spinning.

Abstract: Polypropylene filament was used as the warp yarn, and respectively Basalt filament and Polypropylene filament was applied to the weft yarn, several samples were woven in different organizational structure. Then the effect factors of filtration were tested, and permeability, abrasion resistance and air permeability of these samples were measured, filtration resistance was evaluated indirectly through the Flow Tester. How the influence of the performances of raw material the filtrating properties of the samples were investigated, which based on the above experiment, as well as the other factors. The results show that permeability and air permeability had little change in the same process parameters, however, abrasion resistance of the samples by basalt filament significantly were superior to the performance of polypropylene filament.

Abstract: The three composite boards which were made of continuous basalt fiber (CBF) and polypropylene fiber (PP) in different fiber ratios were researched on this paper. The manufacturing forming process included blending, carding, web formation, laminating and compression molding orderly. The tension and bending properties were investigated experimentally, and then dual variance analysis was used to show the significant difference of the mechanical property in the transverse and longitudinal orientation as well the appreciable impact of different fiber ratios to the mechanical property. The results show that the difference of the tension and blending strength in the same direction, among composite boards in different fiber proportions, is about 1~10Mpa; the difference in the same fiber proportion, between transverse and longitudinal, vary within a wide range from 10Mpa to 30Mpa. The results of variance analysis have also proved the conclusion, the difference between transverse and longitudinal is more significant than the difference among different fiber proportions. In the similar study, the significance hadn’t been seen sufficiently, so this paper provides reference to the actual application of the composite board.

Abstract: The 80Ni20Cr coatings on cotton fabric substrates using the electron beam evaporated deposition are reported to improve the electrical conductivity of fabric substrates. The cotton fabrics are coated twice for single-faced NiCr film and one time per face for double-faced NiCr film, respectively. The morphology of coatings is characterized by an optical microscopy. The effect of sample length and test orientation of warp-wise and weft-wise on electrical conductivity is measured. It is found that the NiCr coatings dramatically increase the electrical conductivity of cotton fabrics. For warp-wise orientation with lengthwidth (4 cm1 cm) of test sample, the surface resistance is about 0.7 MΩ for single-faced coating and 0.89 MΩ for double-faced coating, while the surface resistance of raw cotton fabric is above 104 MΩ. The results tested from warp-wise and weft-wise are uniform, which is mainly because of the structure balance of the plain fabrics. The microstructure observation indicates that the single-faced coatings are uniform and dense, and the present double-faced coating processes are not enough to completely cover the fabric substrates. The uniform and dense coatings of single-faced NiCr coatings could be the reason that the electrical conductivity is better than that of the present double-faced NiCr coating.

Abstract: Compared to traditional fiberglass, basalt fibers have a wide spectrum of applications used as textile fiber or reinforcement for composites. Epoxy resin composites filled with basalt fibers were prepared by proper curing, using KH-550 silane coupling agent to enhance the interfacial bonding between the inorganic reinforcing agent and the polymer matrix. The milling abrasive wear was investigated in slurry containing sand abrasive particles using milling equipment. The experimental results indicated that basalt fibers, EP and the nano-sized SiO2 filling formed steady composites. The wear rate of the sample was reduced with the increase of resin content before the content of resin amounted to 40%. When the content of resin is more than 40%, the wear rate of the sample deceased slightly.