Alkali and epoxy-silane surface modified pine cone flour reinforced polypropylene/poly (lactic acid) blend: viscoelastic and morphological characterization

2021 ◽  
pp. 1-24
Author(s):  
Fayçal Kabache ◽  
Sorya Nekkaa ◽  
Melia Guessoum
Keyword(s):  
Lactic Acid ◽  
Morphological Characterization ◽  
Poly Lactic Acid ◽  
Pine Cone ◽  
Surface Modified

scholarly journals Fracture Toughness Improvement of Poly(lactic acid) Reinforced with Poly(ε-caprolactone) and Surface-Modified Silicon Carbide

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Jie Chen ◽  
Tian-Yi Zhang ◽  
Fan-Long Jin ◽  
Soo-Jin Park
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Lactic Acid ◽  
Poly Lactic Acid ◽  
External Energy ◽  
Solution Blending ◽  
Blending Method ◽  
Sic Whiskers ◽  
Sic Composites ◽  
Surface Modified

In this study, bio-based poly(lactic acid) (PLA)/polycaprolactone (PCL) blends and PLA/PCL/silicon carbide (SiC) composites were prepared using a solution blending method. The surface of the SiC whiskers was modified using a silane coupling agent. The effects of the PCL and SiC contents on the flexural properties, fracture toughness, morphology of PLA/PCL blends, and PLA/PCL/SiC composites were investigated using several techniques. Both the fracture toughness and flexural strength of PLA increased by the introduction of PCL and were further improved by the formation of SiC whiskers. Fracture surfaces were observed by scanning electron microscopy, which showed that the use of PCL as a reinforcing agent induces plastic deformation in the PLA/PCL blends. The SiC whiskers absorbed external energy because of their good interfacial adhesion with the PLA matrix and through SiC-PLA debonding in the PLA/PCL/SiC composites.

Bio-Composites Based on Poly(lactic acid) Containing Mallow and Eucalyptus Surface Modified Natural Fibers

2018 ◽  
Vol 26 (9) ◽  
pp. 3785-3801 ◽  
Author(s):  
Rafael da Silva Araújo ◽  
Maria de Fátima Vieira Marques ◽  
Priscila Ferreira de Oliveira ◽  
Claudinei Calado Rezende
Keyword(s):  
Lactic Acid ◽  
Natural Fibers ◽  
Poly Lactic Acid ◽  
Surface Modified

Surface-modified halloysite nanotubes reinforced poly(lactic acid) for use in biodegradable coronary stents

2018 ◽  
Vol 135 (30) ◽  
pp. 46521 ◽  
Author(s):  
Yuanyuan Chen ◽  
Alan Murphy ◽  
Dimitri Scholz ◽  
Luke M. Geever ◽  
John G. Lyons ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Halloysite Nanotubes ◽  
Coronary Stents ◽  
Poly Lactic Acid ◽  
Surface Modified

Surface-Modified Cellulose Nanofibers-graft-poly(lactic acid)s Made by Ring-Opening Polymerization of l-Lactide

2019 ◽  
Vol 27 (4) ◽  
pp. 847-861 ◽  
Author(s):  
Chaniga Chuensangjun ◽  
Kyohei Kanomata ◽  
Takuya Kitaoka ◽  
Yusuf Chisti ◽  
Sarote Sirisansaneeyakul
Keyword(s):  
Lactic Acid ◽  
Ring Opening ◽  
Cellulose Nanofibers ◽  
Ring Opening Polymerization ◽  
Poly Lactic Acid ◽  
Surface Modified ◽  
Modified Cellulose

Morphology and Properties of Poly(Lactic Acid)/Ethylene-Octene Copolymer Blends with Different Organoclay Types

2020 ◽  
Vol 837 ◽  
pp. 174-180
Author(s):  
Sirirat Wacharawichanant ◽  
Attachai Sriwattana ◽  
Kulaya Yaisoon ◽  
Manop Phankokkruad
Keyword(s):  
Thermal Stability ◽  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Mechanical And Thermal Properties ◽  
Two Phase ◽  
Copolymer Blends ◽  
Ethylene Octene Copolymer ◽  
Surface Modified ◽  
Thermal Stability Of ◽  
Observation Results

This work studied the morphology, mechanical and thermal properties of poly (lactic acid) (PLA)/ethylene-octene copolymer (EOC) (80/20) blends with different organoclay types. Herein, EOC was introduced to toughening PLA by melt blending and organoclay was used to improve compatibility and tensile properties of the blends. The two organoclay types were nanoclay surface modified with aminopropyltriethoxysilane 0.5-5 wt% and octadecylamine 15-35% (Clay-ASO) and nanoclay surface modified with dimethyl dialkyl (C14-C18) amine 35-45 wt% (Clay-DDA). The organoclay contents were 3, 5 and 7 phr. Scanning electron microscope (SEM) observation results revealed PLA/EOC blends demonstrated a two-phase separation of dispersed EOC phase and PLA matrix phase. The addition of organoclay significantly improved the compatibility between PLA and EOC phases due to EOC droplet size decreased dominantly in PLA matrix, so organoclay could act as an effective compatibilizer. The incorporation of organoclay increased significantly tensile strength of PLA/EOC/organoclay composites while Young’s modulus increased with 5 phr of organoclay. The thermal stability of PLA/EOC blends did not change when compared with neat PLA, and when added Clay-ASO in the blends could improve the thermal stability of the PLA/EOC blends.

Physical properties and cytotoxicity of surface-modified bovine bone-based hydroxyapatite/poly(lactic acid) composites

2010 ◽  
Vol 45 (12) ◽  
pp. 1259-1269 ◽  
Author(s):  
Suriyan Rakmae ◽  
Yupaporn Ruksakulpiwat ◽  
Wimonlak Sutapun ◽  
Nitinat Suppakarn
Keyword(s):  
Lactic Acid ◽  
Physical Properties ◽  
Poly Lactic Acid ◽  
Bovine Bone ◽  
Surface Modified

Effect of Thermoplastic Polyurethane-Modified Silica on Melt-Blended Poly(Lactic Acid) (PLA) Nanocomposites

2017 ◽  
Vol 25 (8) ◽  
pp. 583-592 ◽  
Author(s):  
Sun-Mou Lai ◽  
Pei-Wen Li
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Polyurethane ◽  
Optical Transmittance ◽  
Poly Lactic Acid ◽  
Modified Silica ◽  
Moulding Process ◽  
Fast Processing ◽  
Unmodified Silica ◽  
Silica Dispersion ◽  
Surface Modified

3-aminopropyltriethoxysilane (APTES) was used as a coupling agent to graft thermoplastic polyurethane (TPU) onto a nanosilica surface. The modification of TPU on the surface of silica nanoparticles was confirmed by FTIR, NMR, ESCA and TGA assessment. The grafting degree of TPU onto the silica was about 7.3%. The incorporation of surface-modified silica (TAS50) into poly(lactic acid) (PLA) induced the nucleation of PLA, giving a higher crystallisation peak temperature, which would be advantageous for fast processing cycles in the commercial moulding process. With pristine silica incorporated into PLA, the variation in the cold crystallisation and melting temperatures was limited. However, for the surface-modified silica filled PLA, a lower cold crystallisation temperature at 112.1 °C and a shift of melting temperature from Tm1 to Tm2 at 167.7 °C were observed. The cooling rate also played an essential role in the derived crystalline forms. The tensile strength of the composite containing modified silica was slightly higher than that with the pristine silica, even though both showed similar degrees of silica dispersion from the morphology observation. For the surface-modified silica composite, the optical transmittance was higher than that of unmodified silica case. This finding implies the significance of the surface modification.

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