The complex solutions formed between polyquaternium-10 (PQ-10), a cationic polymer, and sodium cocoyl alaninate (SCoA), an anionic surfactant, were in three different stages of dissolved state depending on the mixing ratio, and the phase behavior of complex solutions for each stage was examined. The viscosity and modulus changes of the PQ-10 polymer solution and the PQ-10/SCoA complex solution were compared, and a relaxation time was calculated. In addition, the thixotropic behavior of the complex solution forming the network was examined through shear stress-strain rate measurement, and the flow behavior index value was obtained by applying the Herschel – Bulkley fluid model equation. Finally, the C.M.C value of SCoA in pure water and the C.A.C value of SCoA in PQ-10 solution were compared, and the effect of the combination of PQ-10 and SCoA on the wettability of water was investigated.

양이온 고분자인 polyquaternium-10(PQ-10)과 음이온 계면활성제인 sodium cocoyl alaninate(SCoA)간에 형성된 콤플렉스 수용액은 혼합비율에 따라 3 단계의 상태로 나눠짐을 확인하였으며 이에 더하여 각 단계의 콤플렉스 수용액의 상거동을 살펴보았다. PQ-10 고분자 수용액과 PQ-10/SCoA 콤플렉스 수용액의 점도 및 탄성률 변화를 비교하고 이완 시간 등을 산출하였다. 또한 전단 응력-변형률 측정을 통해, 네트워크를 형성하는 콤플렉스 수용액의 씩소트로픽 거동을 확인하고, Herschel – Bulkley fluid 모델식을 적용하여 흐름거동 지수 값을 구하였다. 마지막으로 SCoA의 순수 물에서의 C.M.C 값과 PQ-10 수용액에서의 C.A.C 값을 비교하고, PQ-10과 SCoA 조합이 물의 젖음성에 주는 영향을 살펴보았다.

Keywords: polyquaternium-10, sodium cocoyl alaninate, complex, rheological property, wettability.