Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (06): 703-707.doi: 10.3866/PKU.WHXB19910613

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The Effects of Chain Length of Straight Chain Alcohol on the Strucutre and Stability of Lamellar Liquid Crystal

Guo Rong   

  1. Chemistry Department, Yangzhou Teachers College, Yangzhou 225002
  • Received:1990-05-15 Revised:1990-12-13 Published:1991-12-15
  • Contact: Guo Rong

Abstract: The measurements of low angle X-ray diffraction showed that the degression of d_0 of lamellar liquid crystal with increase of weight ratio of C_nOH/SDS decreased with increase of the carbon chain length of alcohol used aseosurfactant. The values of d_0 increased with carbon number of alcohol n at certain weight ratio of C_nOH/SDS. The increase of interlayer spacing d with n was related with the increase of d_0 and the decrease of solvent penetration in lamellar liquid crystal under the conditione of weight ratio of C_nOH/SDS and water content. Both the measurements of low angle X-ray diffraction and the phase diagram behavior showed that the stability of lamellar liquid crystal increased with the chain length of alcohol.

Key words: Lamellar liquid crystal, Straight chain alcohol, Chain length, Stability, Low angle X-ray diffraction