Synthesis and characterization of methylcellulose from cellulose extracted from mango seeds for use as a mortar additive

Júlia G Vieira,Fernanda A C Faria,Rosana M N De Assunção,Carla Da S Meireles,Sebastião F Da Cruz,Guimes Rodrigues Filho,Daniel Pasquini,Leila A De C Motta,Dayane D Gomide

doi:10.1590/s0104-14282012005000011

Júlia G Vieira, Fernanda A C Faria + Show 7 more

Open Access

https://doi.org/10.1590/s0104-14282012005000011

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Abstract

Methylcellulose was produced from the fibers of Mangifera indica L. Ubá mango seeds. MCD and MCI methylcellulose samples were made by heterogeneous methylation, using dimethyl sulfate and iodomethane as alkylating agents, respectively. The materials produced were characterized for their thermal properties (DSC and TGA), crystallinity (XRD) and Degree of Substitution (DS) in the chemical route. The cellulose derivatives were employed as mortar additive in order to improve mortar workability and adhesion to the substrate. These properties were evaluated by means of the consistency index (CI) and bond tensile strength (TS) tests. The methylcellulose (MCD and MCI) samples had CI increased by 27.75 and 71.54% and TS increased by 23.33 and 29.78%, respectively, in comparison to the reference sample. Therefore, the polymers can be used to produce adhesive mortars.

Highlights

Paper pulp is the main source of cellulose but in the literatureIn civil construction, methylcellulose and other ethers such there are a number of studies concerning the development of as hydroxyethyl cellulose (HEC), hydroxypropyl methylcellulose several agribusiness wastes for this purpose
Crude mango seed (CS) and delignified seed (DSE) fibers were characterized for cellulose and Klason lignin contents
The cellulose content of crude seed is greater than that of sugarcane bagasse which is approximately 45%[1]. These results show the potential for investment in this source to produce cellulosebased products

Summary

Introduction

Paper pulp is the main source of cellulose but in the literatureIn civil construction, methylcellulose and other ethers such there are a number of studies concerning the development of as hydroxyethyl cellulose (HEC), hydroxypropyl methylcellulose several agribusiness wastes for this purpose. One of the main agribusinesses in Brazil is fruit farming which substrate[13,14]. These macromolecules significantly increase has increased in recent years. In 2004, Brazil was the ninth world the water-retention capacity and paste viscosity. The following of concrete during transport and storage, stabilizing the concrete varieties are cultivated: Tommy Atkins, Haden, Keith, Palmer and while fresh. Because they result in highly viscous systems with a

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