In this study, the melt-drawing behavior of melt-spun ultrahigh-molecular-weight polyethylene (UHMW-PE) fibers with different oriented crystalline states was investigated by in situ wide-angle X-ray diffraction (WAXD) measurements. Melt-spun UHMW-PE fibers with different oriented crystalline states were prepared at different take-up speeds. The obtained melt-spun fibers were melt-drawn at 140 °C, and the oriented crystallization behavior during melt-drawing was evaluated by in situ WAXD measurements. Drawing started from a state where molten amorphous and oriented crystals coexisted. As drawing proceeded, the oriented crystallization occurred during melt-drawing. Rapid oriented crystallization occurred for the melt-spun fiber prepared at a high take-up speed with many remaining oriented crystals, indicating the effective transmission of the applied stress through the remaining oriented crystals. On the other hand, gentle oriented crystallization with chain slippage occurred during the melt-drawing of the melt-spun fiber prepared at a low take-up speed with few remaining oriented crystals. The oriented crystallization with chain slippage improved the melt drawability and simultaneously yielded a high crystalline orientation, resulting in melt-drawn fibers with both high tensile strength and small diameter. The findings obtained are important for simultaneously achieving high strength and small diameter of UHMW-PE fibers prepared by melt-processing.

As the global environment changes, the development of thermal functionality of fabric products has attracting attention. Accordingly, methods to measure the surface temperature of fabrics and an experimental system to immediately provide changes in humidity for this purpose were examined. We first attempted a method to move the humidity setting of an artificial climate chamber up and down at the maximum rate for the evaluation of exothermicity of moisture absorption and endothermicity of moisture release characteristics. Next, we evaluated a method to move back and forth between two consecutive climate artificial chambers to measure exothermicity of moisture absorption and endothermicity of moisture properties with higher accuracy. The latter method was then used to compare the infrared thermocamera, a non-contact thermometer, with the K-type thermocouple sensor, a contact thermometer.

The results suggested that the thermometer’s heat capacity had an effect on the measurement. Furthermore, when woven and knitted fabrics were measured by moving them between low and high humidity environments of 10 °C, 20 °C, and 30 °C, a correlation was found between the amount of heat generated and the grade of the woven and knitted fabrics.

Tuber is a widely applied ingredient in cooking, medicine, and textile coloring since ancient time. The long-term wide range application has proved its safety in day-to-day usage. The antibacterial and antiviral properties were discovered during the covid-19 Pandemic, but so far there is no research on its pharmaceutical properties in combating of the disease. In this research, the method of Network Pharmacology was applied to explore the medicinal properties and the mechanism behind it.

The PubChem database was used to screen the effective targets in Tuber tannin. GeneCard and OMIM databases were used to identify targets related to Covid-19. The STRING database was used to filter the intersection of Tuber and Target-disease. Cytoscape was used to construct a complex target interaction and protein-protein interaction network, which described the relations between disease target and biological reactions. KEGG pathway and GO enrichment analysis was applied to explore its mechanism of action. With all the actions above, the interaction between Tuber tannin and Covid-19 was verified.

A total of 66 intersection targets and 573 were screened out. It was further determined that a total of 921 biological processes (BP), 13 cell component (CC), and 32 molecular functions (MF) were obtained (P value<0.05). The results show that there is a stable biological process between Tuber tannin and the Covid-19 target.

The analysis of the obtained network pharmacology results can predict and discuss the multi-target and multi-path mechanism of Tuber tannin as an effective way to prevent and control Covid-19.