Novel uniform nano/micron-sized ZnO spheres assembled from the aggregation of nano-particles have been synthesized by hydrothermal method. It was observed that ZnO spheres with controllable diameter were obtained when various volume ratios of triethanolamine (TEA) to H2O were used. Increasing the volume ratio of TEA to H2O could result in the formation of loosely packed ZnO spheres. The UV-visible absorption spectra show that the absorption peak red-shifts with the increasing average diameter of the spheres.

A nano-ZnO/polystyrene resin composite was prepared by adsorption nano-ZnO predecessor (Zn2+) onto macroporous strong acid cation exchange resin, denoted as D001, followed by chemical precipitation. The framework FT-IR spectrums showed new adsorption bands at ca. 1615 cm-1 and ca. 530 cm-1 were observed in ZnO@D001 compared to D001, and vibration peak shift in D001 was found from 1001 cm-1 to 1080 cm-1 in ZnO@D001. The specific surface area declined a litte, but pore volume and average pore diameter declined a lot when nano-ZnO immobilized onto D001. All of above results demonstrated the nano-ZnO particles immobilized on the inner nano-pores/channels of D001 successfully. The coefficient of volume and surface resistance (ρV, ρS) values of ZnO@D001 were lower than 104 Ω•m, indicating its excellent antielectrostatic ability.

This paper discusses the composition, structural features, working principle, and technical performance of a kind of motor torque measurement system. This system adopts two kinds of torque measurement methods, dynamic torque measurement method and static torque measurement method, uses microprocessor to collect data including rotational speed of load motor and torque signals of to-be-tested motor, figures out the rotational speed and torque through software algorithm, as well as displays and output them. This system also makes actual measurement of a type of motor. The measurement period is short; the measurement precision is high; and the performance is stable.