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In this work, the nano-SiO 2 was firstly modified by silane coupling agent (3-aminopropyltriethoxysilane), meanwhile the dispersion of nanoparticles was studied with transmission electron microscope (TEM). Then urea-formaldehyde (UF) resins were synthesized and modified with the compound modifier made of different ratio of modified nano-SiO 2 and oxidized starch. All the products were characterized with Fourier transform infrared spectroscopy (FTIR). Free formaldehyde content and bonding strength were measured as the main standard of the performance of the resin. The other performances of modified UF resins were also analysized by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The results showed that the modification could effectively reduce the free formaldehyde content, from 0.49 to 0.19%, and enhance the bonding strength, from 0.90 to 2.06 MPa.

Waste cotton linters from textile industry were used as templates to be transformed as cotton fiber/SiO complex after sol impregnation, carbonization, carbon thermal reduction reaction, to prepare nanoSiC fibers and nanoparticles. The phase of final products were identified by XRD as β-SiC, and the diameter size of nanoSiC fiber was ranged as 20~100mm analyzed by SEM and TEM. Based on the thermodynamic analysis of each step in the thermal reduction on carbon / SiO composite to generate nanoSiC fibers, the nanoSiC fibers were generated by the vapor reaction between SiO and CO, and its growth mechanism was deduced as vapor-solid. For the reuse of cotton linter, thus the research provides a new solution.

In order to get a kind of environmentally anti-felting finishing process for woolen knitted knitted fabric,the method of microwave / hydrogen peroxide pretreatment is applied and the effect of chitosan anti-felting finishing process is studied in this paper. The results show that the application of microwave technology can greatly reduce the time of pretreatment and increase the efficiency of pretreatment; the anti-felting process of hydrogen peroxide/microwave pretreatment combined with chitosan finishing for the woolen knitted fabric is effective, environmentally friendly.