The adsorption of nonionic surfactant Triton X-100 onto preformed particle gel (PPG) was studied. It is indicated that the adsorption isotherms of Triton X-100 onto PPG can well be fitted by Langmuir model which is used to describe the monolayer molecule adsorption. The effect of Triton X-100 on the swelling ratio of PPG was discussed using laser size meter and it is found that the size of PPG decreases in the presence of Triton X-100. The steady and dynamic rheological experiments results show that PPG exhibits shear-thinning property and is easily broken under shearing in the presence of Triton X-100. With increase of Triton X-100 concentration, the storage modulus of PPG decreases
