Detergency of Soluble Sodium Silicate

수용성 규산나트륨의 세정성

  • 하윤식 (인하대학교 공과대학 화학공학과) ;
  • 박경일 (경상대학교 자연과학대학 화학과) ;
  • 서무룡 (경상대학교 자연과학대학 화학과)
  • Received : 1998.09.21
  • Published : 1999.02.25


Silicate used as laundry detergent builder was good for pH buffering capacity and solubility but calcium-ion binding capacity and surfactant adsorption ability were lower. As $SiO_2/Na_2O$ molar ratio became higher, pH buffering capacity and ion exchange ability were lower and surfactant adsorption ability was little higher. Anionic surfactant LAS (linear alkylbenzene sulphonate), nonionic surfactant LA-9 (lauryl alcohol EO-9) were used to investigate the detergency performance. Zeolite was better than sodium silicate in detergency performance. In case of LAS, detergency performance was good when $SiO_2/Na_2O$ molar ratio was lower. In case of LA-9, detergency performance was similar without discrimination of molar ratio of $SiO_2/Na_2O$.


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