Table 1.

The recipe of the synthesis

Sample code	Aqueous phase, mL					Organic phase, mL		Chili pepper extract, mL
	EG	BD	PEG	Isolan® GI 34	Distilled water	EG/HMDI	Acetone
PU_0	0.35	0.65	1.50	1.35	40.00	0.15/1.55	20.00	–
PU_1	0.35	0.65	1.50	1.35	40.00	0.15/1.55	20.00	0.80

Abbreviations: BD, 1,4-butanediol; EG, ethylene glycol; HMDI, hexamethylene diisocyanate; PEG, polyethylene glycol.