Abstract
This study investigates liquid crystalline (LC) formation and lower critical solution temperature (LCST) of HPC solutions upon the addition of XG in various ratios. The LC region of HPC/H2O/H3PO4 tertiary system was significantly enlarged at low XG/HPC blending ratio of 1–10 wt%. The addition of well oriented 2-D XG molecules to HPC polymer induced easy orientation of linear HPC molecules to synergistically form a stable anisotropic phase. The LCST point of HPC solutions initially decreased with adding a little amount of XG and then increased with XG/HPC ratio of over 50/50. In HPC-rich medium, XG helices easily attracted H2O molecules at high temperature owing to their hydroxyl groups. Consequently, the formation of intermolecular hydrogen bonds and the phase separation of HPC molecules proceeded at a lower temperature. In XG-rich medium, the upper critical solution temperature (UCST) behavior of XG obstructed the LCST behavior of HPC, the LCST point of HPC therefore increased and the boundary shrinkage of HPC binodal curve occurred.
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Allain C, Lecourtier J, Chauveteau G (1998) Mesophase formation in high molecular-weight xanthan solutions. Rheol Acta 27(3):255–262. doi:10.1007/BF01329741
Bhatt N, Gupta PK, Naithani S (2011) Hydroxypropyl cellulose from α-cellulose isolated from Lantana camara with respect to DS and rheological behavior. Carbohydr Polym 86:1519–1524. doi:10.1016/j.carbpol.2011.06.054
Carotenuto C, Grizzuti N (2006) Thermoreversible gelation of hydroxypropylcellulose aqueous solutions. Rheol Acta 45:468–473. doi:10.1007/s00397-005-0075-x
Chiba R, Nishio Y, Miyashita Y (2003) Electrooptical behavior of liquid-crystalline (hydroxypropyl)cellulose/inorganic salt aqueous solutions. Macromolecules 36:1706–1712. doi:10.1021/ma021522x
Chiba R, Ito M, Nishio Y (2010) Addition effects of imidazolium salts on mesophase structure and optical properties of concentrated hydroxypropyl cellulose aqueous solutions. Polym J 42:232–241. doi:10.1038/pj.2009.338
Coleman MM, Painter PC (1995) Hydrogen bonded polymer blends. Prog Polym Sci 20:1–59. doi:10.1016/0079-6700(94)00038-4
Fischer H, Murray M, Keller A, Odell JA (1995) On the phase diagram of the system hydroxypropylcellulose–water. J Mater Sci 30(18):4623–4627. doi:10.1007/BF01153071
Fortin S, Charlet G (1989) Phase diagram of aqueous solutions of (hydroxypropyl)cellulose. Macromolecules 22(5):2286–2292. doi:10.1021/ma00195a050
Frith WJ (2010) Mixed biopolymer aqueous solutions—phase behavior and rheology. Adv Colloid Interface Sci 161:48–60. doi:10.1016/j.cis.2009.08.001
Gao J, Haidar G, Lu X, Hu Z (2001) Self-association of hydroxypropylcellulose in water. Macromolecules 34(7):2242–2247. doi:10.1021/ma001631g
Guido S (1995) Phase behavior of aqueous solutions of hydroxypropyl cellulose. Macromolecules 28(13):4530–4539. doi:10.1021/ma00117a023
Guido S, Grizzuti N (1995) Phase separation effects in the rheology of aqueous solutions of hydroxypropylcellulose. Rheol Acta 34:137–146. doi:10.1007/BF00398433
He Y, Zhu B, Inoue Y (2004) Hydrogen bonds in polymer blends. Prog Polym Sci 29:1021–1051. doi:10.1016/j.progpolymsci.2004.07.002
Korneeva EV, Shtennikova IN, Shibaev VP, Klenin SI, Kolbina GF, Ekaeva IV, Didenko S (1990) Conformational properties of hydroxypropyl cellulose—I. Hydrodynamic properties and equilibrium rigidity of its macromolecules. Eur Polym J 26(7):781–785. doi:10.1016/0014-3057(90)90129-R
Maret G, Milas M, Rinaudo M (1981) Cholesteric order in aqueous solutions of the polysaccharide xanthan. Polym Bull 4(5):291–297. doi:10.1007/BF00255106
Milas M, Rinaudo M, Tinland B (1985) The viscosity dependence on concentration, molecular weight and shear rate of xanthan solutions. Polym Bull 14(2):157–164. doi:10.1007/BF00708475
Nishio Y, Chiba R, Miyashita Y, Oshima K, Miyajima T, Kimura N, Suzuki H (2002) Salt addition effects on mesophase structure and optical properties of aqueous hydroxypropyl cellulose solutions. Polym J 34(3):149–157. doi:10.1295/polymj.34.149
Norton IT, Frith WJ (2001) Microstructure design in mixed biopolymer composites. Food Hydrocoll 15:543–553. doi:10.1016/S0268-005X(01)00062-5
Rinaudo M, Moroni A (2009) Rheological behavior of binary and ternary mixtures of polysaccharides in aqueous medium. Food Hydrocoll 23(7):1720–1728. doi:10.1016/j.foodhyd.2009.01.012
Rwei SP, Lyu MS (2012) 3-D phase diagram of HPC/H2O/H3PO4 tertiary system. Cellulose 19(4):1065–1074. doi:10.1007/s10570-012-9707-3
Rwei SP, Lyu MS (2013) HPC/H2O/H3PO4 tertiary system: a rheological study. Cellulose 20(1):135–147. doi:10.1007/s10570-012-9810-5
Rwei SP, Nguyen TA (2014a) Liquid crystalline phase in xanthan gum (XG)/H2O/H3PO3 and XG/H2O/H3PO4 tertiary systems: a thermal and rheological study. Cellulose 21(5):3231–3241. doi:10.1007/s10570-014-0358-4
Rwei SP, Nguyen TA (2014b) Phase formation and transition in a xanthan gum/H2O/H3PO4 tertiary system. Cellulose 21(3):1277–1288. doi:10.1007/s10570-014-0193-7
Schagerlo H, Richardson S, Momcilovic D, Brinkmalm G, Wittgren B, Tjerneld F (2006) Characterization of chemical substitution of hydroxypropyl cellulose using enzymatic degradation. Macromolecules 7(1):80–85. doi:10.1021/bm050430n
Shtennikova IN, Kolbina GF, Shibaev VP, Ekaeva IV (1990) Conformational properties of hydroxypropyl cellulose—II. Flow birefringence and optical anisotropy of hydroxypropyl cellulose macromolecules. Eur Polym J 26(7):787–790. doi:10.1016/0014-3057(90)90130-V
Wolf B, Scirocco R, Frith WJ, Norton IT (2000) Shear-induced anisotropic microstructure in phase-separated biopolymer mixtures. Food Hydrocoll 14:217–225. doi:10.1016/S0268-005X(99)00062-4
Yoshida H, Hatakeyama T, Hatakeyama H (1990) Phase transitions of the water-xanthan system. Polymer 31(4):693–698. doi:10.1016/0032-3861(90)90291-6
Yu L, Dean K, Li L (2006) Polymer blends and composites from renewable resources. Prog Polym Sci 31:579–602. doi:10.1016/j.progpolymsci.2006.03.002
Yuen SN, Choi SM, Phillips DL, Ma CY (2009) Raman and FITR spectroscopic study of carboxymethylated non-starch polysaccharides. Food Chem 114:1091–1098. doi:10.1016/j.foodchem.2008.10.053
Acknowledgments
The authors would like to thank the National Science Council of the Republic of China, Taiwan, for financially supporting this research under Contract No. NSC-102-2218-E-027-015. Ted Knoy is appreciated for his editorial assistance.
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Rwei, SP., Nguyen, TA. Formation of liquid crystals and behavior of LCST upon addition of xanthan gum (XG) to hydroxypropyl cellulose (HPC) solutions. Cellulose 22, 53–61 (2015). https://doi.org/10.1007/s10570-014-0469-y
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DOI: https://doi.org/10.1007/s10570-014-0469-y