Abstract: The factors include modifier dosage, temperature, time and PH value to the organic surface modification of TiO2 by SDBS was studied with orthogonal experiment. The results show that while the amount of SDBS is 11%, the temperature is 90 ℃, time is 45min, PH value is 5, TiO2 is modified best. Covered tea trees with the modified TiO2 coated nonwovens, recorded shed and outdoor nonwoven temperature and measured content of tea polyphenols and caffeine by chromatograms for studying agricultural covering nonwovens’ insulation performance. The results show that when the mass ratio of modified TiO2 is 25%, the agricultural covering nonwovens’ shed and outdoor temperature is maximum, content of polyphenols and caffeine is the highest, agricultural covering nonwovens’ insulation is best.

Key words: titanium dioxide, sodium dodecyl benzene sulfonate, modify, agricultural covering nonwoven, insulation performance