Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Study on the Surface Activity of Rhamnolipid (RL) and Function of RL in Liquid Detergent

람노리피드의 계면특성 및 액체세정제에서의 기능에 대한 연구

  • Chi, Gyeong-Yup (Natural Material Fermentation for Cosmetic Laboratory, Division of Bio-Technology and Convergence, Daegu Haany University) ;
  • Lim, JongChoo (Dept. of Chemical and Biochemical Eng., Dongguk University-Seoul)
  • 지경엽 (대구한의대학교 바이오산업융합학부) ;
  • 임종주 (동국대학교 서울 공과대학 화공생물공학과)
  • Received : 2018.08.21
  • Accepted : 2018.09.19
  • Published : 2018.12.10
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Abstract

Surface activities including CMC, surface tension, foaming power etc. of the rhamnolipid (RL), a biosurfactant fermented by microorganism were investigated. Both the RL and liquid detergent contained RL showed a good surface activity. For the detergency test, the liquid detergent with RL showed a slightly better performance than that of using an fatty acid. However for the foaming profile, the liquid detergent with RL exhibited a lot of foam volume and the suppression of the rinsing and foaming during rinsing cycles with the RL was not seen. Therefore it can be concluded that RL can be used as a main surfactant or co-surfactant in liquid detergents without functions of foaming suppression or rinse-aid.

미생물 발효 생계면활성제인 람노리피드의 계면활성(CMC, 표면장력, 기포력 등)을 측정하였다. 람노리피드는 우수한 표면활성을 나타내었다. 람노리피드가 처방된 세정제도 우수한 표면활성을 나타내었다. 액체세정제의 성능평가 결과 지방산 대비 람노리피드가 사용된 제품의 성능이 미세하게 우세하였다. 그렇지만 기포 프로화일에서는 람노리피드가 처방된 제품의 기포량이 아주 많았으며, 헹굼과정에서 지방산의 억포작용과 같은 헹굼성 보조 작용은 나타나지 않았다. 람노리피드는 생계면활성제로써 주계면활성제 또는 보조계면활성제로써 사용될 수 있을 것이다. 그러나 지방산과 같은 억포제 또는 헹굼 보조 기능은 가지지 않은 것으로 판단된다.

Keywords

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Figure 1. Surface tension measurement of surfactant solutions at 25 ℃; (a) static surface tension, (b) dynamic Surface tension.

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Figure 2. Prepared liquid detergent ; Formula 1(a) and Formula 2(b).

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Figure (a)

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Figure (b)

Table 1. Score Board of Foam Profile in Laundry Machine

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Table. 2. Physical Properties of Rhamnolipid

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Table 3. Base Formula and Physical Properties of Liquid Detergent

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Table 4. Detergency of Cleaning Liquid Detergent

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Table 5. Foam Profile in the Washing and Rinsing of Cleaning Liquid Detergent on Laundry Machine

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