Synthesis and application of environmentally friendly fluorinecontaining multi-finishing agent

In this paper,an PFOS-free environmentally friendly fluorine-containing multi-finishing agent was synthesized by using tripolyphosphonitrilic chloride,tetrafluoropropanol and sodium metal as raw materials and tetrahydrofuran as solvent,the finishing effect on cotton fabric was researched. The structure of this finishing agent was characterized by IR. The influence of dosage of finishing agent,catalyst and baking temperature on flame retardancy and water repellency of the finished fabric were also researched,and the optimum process was as follows: two-dipping-two padding is adopted,the dosage of finishing agent was 100 g / L,the dosage of catalyst was 2. 5 g / L,and the baking temperature was150 ℃. The finished cotton fabric was analyzed by TG and DTG,and the results show that the thermal stability of the finished cotton fabric was improved,and the residue amount was increased. And the LOI value test results indicated that the finished fabric has good flame retardancy,and the contact angle test result indicated that the finished fabric has good water repellence.