Boetje, Laura published the artcileMore efficient synthesis and properties of saturated and unsaturated starch esters, COA of Formula: C9H18O2, the main research area is synthesis property saturated unsaturated starch ester hydrophobicity contact angle; Fatty acid starch ester; Hydrophobicity; Methyl 10-undcenoate (PubChem CID: 8138); Methyl linoleate (PubChem CID: 5284421); Methyl octanoate (PubChem CID: 8091); Methyl oleate (PubChem CID: 5364509); Methyl stearate (PubChem CID: 8201); Methyl trans-2-octenoate (PubChem CID: 5364532); Methyl undecanoate (PubChem CID: 15607); Side-chain crystallinity; Thermal properties; Transesterification; Unsaturated fatty acid.
This work presents a series of starch esters synthesized via 1,5,7-triazabicyclo[4.4.0]-dec-5-ene (TBD) catalyzed transesterifications in DMSO (DMSO). The reaction was performed with saturated and unsaturated fatty acids (8, 11, and 18 carbon atoms). The degree of substitution (DS) was raised by purging the reaction flask with nitrogen instead of simply performing the reaction under a nitrogen atm. The increase of DS was most obvious for long-chain fatty acids, as an almost complete DS was observed for starch stearate (2.8) and starch oleate (2.7). The products were characterized by differential scanning calorimetry (DSC), thermogravimetric anal. (TGA), and X-ray diffraction. Starch esters from unsaturated fatty acids have a lower Tg than their saturated analogs. Moreover, contact angle and moisture uptake measurements showed increased hydrophobicity for all starch esters in comparison to pristine starch. Our results show a more efficient method for synthesizing a biobased material that steers into the direction of a material that could replace conventional plastics.
Carbohydrate Polymers published new progress about Contact angle. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, COA of Formula: C9H18O2.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics