Porous Cellulose Nanofibril–Natural Rubber Latex Composite Foams for Oil and Organic Solvent Absorption

2020 ◽  
Vol 3 (11) ◽  
pp. 10954-10965
Author(s):  
Marcos V. Lorevice ◽  
Eduardo O. Mendonça ◽  
Naíma M. Orra ◽  
Antonio C. Borges ◽  
Rubia F. Gouveia
Keyword(s):  
Organic Solvent ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Cellulose Nanofibril ◽  
Rubber Latex ◽  
Composite Foams ◽  
Solvent Absorption

scholarly journals Natural Rubber Latex Foam Reinforced with Micro- and Nanofibrillated Cellulose via Dunlop Method

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1959 ◽  
Author(s):  
Sirilak Phomrak ◽  
Adun Nimpaiboon ◽  
Bi-min Zhang Newby ◽  
Muenduen Phisalaphong
Keyword(s):  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Fold Increase ◽  
High Water ◽  
Nanofibrillated Cellulose ◽  
High Porosity ◽  
Rubber Latex ◽  
Good Thermal Stability ◽  
Composite Foams ◽  
Recovery Percentage

Natural rubber latex foam (NRLF) was reinforced with micro- and nanofibrillated cellulose at a loading content of 5–20 parts per hundred of rubber (phr) via the Dunlop process. Cellulose powder from eucalyptus pulp and bacterial cellulose (BC) was used as a microcellulose (MC) and nanocellulose (NC) reinforcing agent, respectively. NRLF, NRLF-MC, and NRLF-NC exhibited interconnected macroporous structures with a high porosity and a low-density. The composite foams contained pores with sizes in a range of 10–500 µm. As compared to MC, NC had a better dispersion inside the NRLF matrix and showed a higher adhesion to the NRLF matrix, resulting in a greater reinforcement. The most increased tensile strengths for MC and NC incorporated NRLF were found to be 0.43 MPa (1.4-fold increase) and 0.73 MPa (2.4-fold increase), respectively, by reinforcing NRLF with 5 phr MC and 15 phr NC, whereas the elongation at break was slightly reduced. Compression testing showed that the recovery percentage was improved to 34.9% (1.3-fold increase) by reinforcement with 15 phr NC, whereas no significant improvement in the recovery percentage was observed with MC. Both NRLF-MC and NRLF-NC presented hydrophobic surfaces and good thermal stability up to 300 °C. Due to their highly porous structure, after a prolong immersion in water, NRLF composites had high water uptake abilities. According to their properties, the composite foams could be further modified for use as green absorption or supporting materials.

scholarly journals Natural rubber latex used as drug delivery system in guided bone regeneration (GBR)

2009 ◽  
Vol 12 (2) ◽  
pp. 253-256 ◽  
Author(s):  
Rondinelli Donizetti Herculano ◽  
Cecília Pereira Silva ◽  
Cibele Ereno ◽  
Sérgio Augusto Catanzaro Guimaraes ◽  
Angela Kinoshita ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Natural Rubber ◽  
Bone Regeneration ◽  
Drug Delivery System ◽  
Delivery System ◽  
Natural Rubber Latex ◽  
Guided Bone Regeneration ◽  
Rubber Latex
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