EFFECT OF GLYCEROL CONTENT ON WATER VAPOR TRANSPORT THROUGH CELLULOSE TRIACETATE FILMS PRODUCED FROM THE USE OF CORN (<i>Zea mays</i> L.) STRAW

Ribeiro, Erlon Alves; Rodrigues Filho, Guimes; Assunção, Rosana Maria Nascimento de; Ferreira, Marcos Vinícius; Royer, Betina; Reis, Felipe Viegas dos; Cerqueira, Daniel Alves; Muñoz, Rodrigo Alejandro Abarza

doi:10.21577/0100-4042.20170662

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Artigo • Quím. Nova 44 (1) • Jan 2021 • https://doi.org/10.21577/0100-4042.20170662 copy

EFFECT OF GLYCEROL CONTENT ON WATER VAPOR TRANSPORT THROUGH CELLULOSE TRIACETATE FILMS PRODUCED FROM THE USE OF CORN (Zea mays L.) STRAW

Authorship SCIMAGO INSTITUTIONS RANKINGS

Glycerol is a plasticizer widely used due to its good plasticization efficiency, great availability, biocompatibility and low exudation. It is a renewable raw material that, when introduced in biodegradable films, promotes significant changes in its properties and, thus, guarantees a wide spectrum of application. In this work, corn straw was used to produce cellulose triacetate films from mixtures with glycerol (10%, 20% and 30%). The films were characterized by X-Ray Diffraction, Scanning Electron Microscopy, Thermogravimetric Analysis, Water Vapor Transport Rate and Water Vapor Permeation. The cellulose triacetate films produced with 20% glycerol have high barrier properties, when compared to films with concentrations 0, 10 and 30%.

Keywords:
cellulose triacetate; corn straw; water transport

Amostras	T_onset (ºC)	PM-I* (%)	T_endset (ºC)	PM-II** (%)	Tmáx (ºC)	m_residual (%)
TAC 0%	325,92	86,95	359,4	0,00	347,24	12,29
TAC 10%	327,87	79,07	360,0	9,51	347,05	10,90
TAC 20%	334,05	70,52	364,1	15,45	351,82	9,60
TAC 30%	333,80	64,22	364,4	24,99	351,46	7,68

%Glic.	L₁(µm)	L₂(µm)	TTVA_médio (g s^-1 cm^-2)	TTVAE (g dia^-1 m^-2 µm )	TTVA_normalizado (g s^-1 cm^-1)	PVA_médio (g m^-1 s^-1 Pa^-1)
0	75,8	78,3	4,86±0,27a ×10 ^-7	32360±1502c	3,74×10^-9	1,19±0,54c ×10 ^-10
10	58,6	59,3	6,11±0,47b ×10 ^-7	31175±3266c	3,60×10^-9	1,15±0,12c ×10 ^-10
20	50,2	53,6	4,90±0,10a ×10 ^-7	21963±1957a	2,54×10^-9	8,09±0,72a ×10 ^-11
30	62,4	53,8	5,51±0,23ab ×10 ^-7	26383±6611b	3,20 ×10 ^-9	1,02±0,14b ×10 ^-10
TAC²⁸	23		1,16 ×10 ^-6	--	2,66 ×10 ^-9	--
TAC24¹⁹ (Jornal)	24		1,42 ×10 ^-6	--	3,40 ×10 ^-9	--
Osmonix¹⁹	168		1,19 ×10 ^-6	--	2,00 ×10 ^-8	--
TAC 20²⁹	20		--	--	3,60 ×10 ^-9	--
TAC 30²⁹	30		--	--	4,65 ×10 ^-9	--
TAC 40²⁹	40		--	--	4,84 ×10 ^-9	--
TAC 50²⁹	50		--	--	4,46 ×10 ^-9	--
TAC(bag)³⁰ 3% sim	10,16		--	--	--	2,66 ×10 ^-11
TAC(bag) ³⁰ 6,5% sim	20,82		--	--	--	4,45 ×10 ^-11
TAC(bag) ³⁰ 10% sim	36,75		--	--	--	8,03 ×10 ^-11
TAC(bag) ³⁰ 3% assim	18,80		--	--	--	5,62 ×10 ^-11
TAC(bag) ³⁰ 6,5% assim	26,16		--	--	--	6,92 ×10 ^-11
TAC(bag) ³⁰ 10% assim	34,04		--	--	--	7,37 ×10 ^-11

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[1] *e-mail: erlon.ribeiro@ifgoiano.edu.br