Characterization and mechanical properties investigation of the cellulose/gypsum composite

Abstract

We synthesized cellulose/gypsum composites in the presence and absence of sodium alginate and investigated the interaction between the composite components as well as the mechanical properties of the final composites. Four different types of cellulose fiber materials were used: cellulose UFC100, cellulose B400, nanofibrillated cellulose, and Lyocell fiber. For all investigated composites the total amount of admixed cellulose was between 1 and 2 wt%, the amount of admixed sodium alginate was 0.5 wt%. We determined the morphology of the composites and observed that the particle and fiber dimensions of the admixed cellulose affect the mode of gypsum-gypsum interlocking and the total porosity of the composites. This in turn had a substantial influence on the mechanical properties of the final composite materials. The addition of sodium alginate resulted in an increase of ultimate strain values. Composites with Lyocell fiber, a synthetic fiber, also had a high Young's modulus.

Natural Fibre Modification and Its Influence on Fibre-matrix Interfacial Properties in Biocomposite Materials

“…Several researchers have demonstrated the suitability of different non-wood fibres in the production of fibre cement composites [22,23]. Gypsum bonded composites have also been produced with different wood based fibres including paper mill sludge, virgin pulp and sawdust [24][25][26].…”

Desempenho físico-mecânico de compósitos à base de gesso reforçados com embalagens multicamadas trituradas

“…Os valores de resistência à flexão dos compósitos variaram de 1,42 a 5,12 MPa. Os valores de referência, ou seja, compósitos sem adição de reforços, apresentaram valores de resistência à flexão média de 5,12 MPa, próximo ao encontrado por Nindiyasari et al [28], Rivero, et al [25] e Serna et al [10], que encontraram 5,65; 5,11 e 5,45 Mpa, respectivamente.…”

Laminated Wallboard Panels Made with Cellulose Nanofibrils as a Binder: Production and Properties

“…According to the Centers for Disease Control and Prevention (CDC), drywall sanders are exposed to as much as 10 times the permissible exposure limit of 15 mg/m 3 for total dust set by the Occupational Safety and Health Administration (OSHA) [21]. Second, gypsum board is known to be brittle [22], which adds a limitation to its applications, and increases waste during construction. Questions have also been raised about the disposal of gypsum board in landfills.…”