The effect of andiroba oil and chitosan concentration on the physical properties of chitosan emulsion film

Kimura, Vanessa Tiemi; Miyasato, Cintia Satiyo; Genesi, Bianca Pereira; Lopes, Patrícia Santos; Yoshida, Cristiana Maria Pedroso; Silva, Classius Ferreira da

doi:10.1590/0104-1428.2013

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Seção Técnica • Polímeros 26 (2) • Apr-Jun 2016 • https://doi.org/10.1590/0104-1428.2013 copy

The effect of andiroba oil and chitosan concentration on the physical properties of chitosan emulsion film

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Chitosan film is used as a dressing to heal burns. The physical and biological properties of the film can be modified by the addition of phytotherapic compounds. This work used the casting -solvent evaporation technique to prepare chitosan film containing andiroba oil (Carapa guianensis) which has anti-inflammatory, antibiotic, and healing properties. The objective of this study was to determine the effect of the concentrations of chitosan and andiroba oil on the physical properties of chitosan films. The emulsion films were evaluated concerning the mechanical properties and fluid handling capacity. Additionally, scanning electron microscopy and thermal analysis were performed. The results showed that the barrier and mechanical properties were affected by the addition of andiroba oil, and these may be modulated as a function of the concentration of oil added to the film. The thermal analysis showed no evidence of chemical interactions between the oil and chitosan.

Keywords:
biopolymers; dressings; Carapa guianensis

Concentration (% w/w)		MVTR (g/10cm²/24h)	Absorbency (g/10cm²/24h)	FHC (g/10cm²/24h)
Chitosan	Andiroba oil	MVTR (g/10cm²/24h)	Absorbency (g/10cm²/24h)	FHC (g/10cm²/24h)
1.0	0.0	1.73 ± 0.07ª	1.67 ± 0.12ª	3.39 ± 0.14
	0.1	2.83 ± 0.28^b	0.62 ± 0.06^b	3.45 ± 0.29
	0.5	1.53 ± 0.12^c	1.59 ± 0.16ª	3.12 ± 0.20
	1.0	1.31 ± 0.13^d	1.49 ± 0.08ª	2.81 ± 0.15
2.0	0.0	3.24 ± 0.22^e	3.43 ± 0.21^c	6.67 ± 0.30
	0.1	1.88 ± 0.12ª	2.32 ± 0.18^d	4.20 ± 0.21
	0.5	1.28 ± 0.13^d	2.74 ± 0.26^e	4.02 ± 0.29
	1.0	1.36 ± 0.07^c,d	2.63 ± 0.21^d,e	3.98 ± 0.22

Concentration (% w/w)		Young’s modulus (MPa)	Tensile strength (N/m²)	Elongation at breaking point (%)
Chitosan	Andiroba oil	Young’s modulus (MPa)	Tensile strength (N/m²)	Elongation at breaking point (%)
1.0	0.0	36.52 ± 1.49^a	169.99 ± 14.06^a	13.59 ± 1.20^a
	0.1	67.67 ± 5.32^b	263.47 ± 22.62^b	13.48 ±1.29^a
	0.5	55.39 ± 4.96^c	204.16 ± 18.71^c	13.07 ± 0.40^a
	1.0	34.63 ± 3.99^a	172.60 ± 17.16^a	13.69 ± 1.03^a
2.0	0.0	62.02 ± 6.75^b,c	171.21 ± 14.01^a	22.56 ± 1.86^b
	0.1	98.50 ± 9.58^d	272.55 ± 17.00^b	9.26 ± 0.89^c
	0.5	81.98 ± 3.55^e	250.20 ± 22.77^b	9.23 ± 0.92^c
	1.0	57.32 ± 4.37^c	182.67 ± 17.11^a,c	12.43 ± 1.14^a

Concentration (% w/w)			% weight loss
Chitosan		Andiroba oil	100 °C	200 °C	300 °C	400 °C	500 °C	600 °C	700 °C
1.0	0.0		12	17	43	59	63	66	69
	0.1		14	22	44	59	66	71	75
	0.5		10	15	34	54	74	76	78
	1.0		9	13	30	54	77	80	82
2.0	0.0		12	19	44	59	63	66	67
	0.1		14	21	44	59	65	69	74
	0.5		10	17	38	52	68	72	75
	1.0		10	15	32	48	73	76	79
Chitosan powder			4	6	32	50	56	60	62
Andiroba oil			0	1	2	21	100	100	100

Concentration (% w/w)
Chitosan	Andiroba oil	T₁	T₂	ΔH₁	ΔH₂
1.0	0.0	103.98	283.02	–288.99	233.48
	0.1	83.60	288.00	–297.25	268.72
	0.5	66.51	288.88	–210.18	181.10
	1.0	61.29	289.43	–112.70	155.37
2.0	0.0	91.07	282.37	–340.13	266.23
	0.1	63.36	287.69	–203.67	102.58
	0.5	77.92	282.47	–259.22	116.44
	1.0	69.55	283.72	–228.50	138.21
Chitosan powder		85.81	296.68	–248.53	198.83

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