Page 155 - Advances in Textile Biotechnology

Remark Major Major Major Traces — Major Traces Major Traces Major Traces

Melting point (°C) 87 184–214 83 83 — 140 147 84 69.6 64 4 70 80

Molecular weight 438.8 518.5 410.8 410.7 — 414.7 414.7 368.6 242.0 256.4 282.5 284.5 340.6

Details of each constituent Chemical formula C 30 H 61 OH C 30 H 30 O 8 C 28 H 58 O C 28 H 58 O C 28 —C 30 C 27 H 56 C 30 H 60 C 31 H 64 C 32 H 66 C 20 H 50 C 20 H 50 C 35 H 60 O 6 C 30 H 50 O C 21 H 43 O 20 C 15 H 30 O 2 C 16 H 32 O 2 C 18 H 34 O 2 C 18 H 36 O 2 C 22 H 44 O 2

Table 6.1 Detailed composition of cotton wax (Agrawal, 2005)
Constituent n-Triacontanol Gossypol (colouring matter) Montanyl (1-octacosanol) Octacosanol Other alcohol Glycerol (low molecular weight alcohol, esterified with fatty acid) Heptacosane Triacontane Untriacontane Dotriacontane β-Sitosterol γ-Sitosterol Sitosterol glucoside (sitosteroline) α- and β-Amyrin n-Tetra

% Dry weight 40–52 7–13 3–8 23–47 ?

Main constituents High molecular weight alcohol C 23 to C 34 Saturated and unsaturated hydrocarbons Phytosterol, sterol, glucoside and polyterpenes Fatty acid (with even number of carbon atoms) in free or ed form esterifi Resins

able part, 52–62% able part, 37–47%

Type Unsaponifi Saponifi

© Woodhead Publishing Limited, 2010