Application of Solubility Parameters to Lignocellulosic/Thermoplastic Composites

1992 ◽  
Vol 266 ◽  
Author(s):  
Don H. White ◽  
S. C. Park
Keyword(s):  
Physical Properties ◽  
Polymer Blends ◽  
Wood Fiber ◽  
Thermoplastic Composites ◽  
Solubility Parameters ◽  
Current Interest ◽  
Wood Fibers ◽  
Good Adhesion ◽  
Miscible Polymer Blends ◽  
Miscible Blends

AbstractThe usefulness of solubility parameters in identifying miscible polymer blends is reviewed. The use of wood fibers in mixtures of recycled thermoplastics is of current interest. These composites do not require miscible blends of polymers, but must exhibit compatibility in order to have good adhesion and physical properties. The use of solubility parameters to design improved composites is cited. This approach is then applied to wood fiber/polyolefin thermoplastic composites.

scholarly journals Wood fiber-reinforced polylactic acid sheets enabled by papermaking

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 8258-8272
Author(s):  
Yang Zhao ◽  
Qinpeng Shen ◽  
Yuanxin Duan ◽  
Shuyin Wu ◽  
Ping Lei ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Physical Properties ◽  
Polylactic Acid ◽  
Wood Fiber ◽  
Wood Fibers ◽  
Paper Sheet ◽  
Promising Strategy ◽  
Combined Use ◽  
Folding Endurance ◽  
The Impact

Polylactic acid is a biodegradable thermoplastic polyester derived from renewable polysaccharides. In this work, softwood fibers were used to reinforce the paper sheet made from polylactic acid fibers, thus addressing the challenges regarding low density, rough surface, and weak strength. The impact of wood fibers and calendering on the physical properties (density, roughness, tensile strength, and folding endurance) of the composite paper were identified. Furthermore, the morphology of papers with different fiber contents and those that had been calendered was characterized with a scanning electron microscope. The use of wood fibers resulted in the improvement of the physical properties of the polylactic acid paper, and the enhanced refining of wood fibers had a favorable role in improving paper density, smoothness, and mechanical strength. The tensile index increased 37.9% when the beating degree of wood fibers increased from 25 to 60 °SR. After calendering, the density, smoothness, tensile strength, folding endurance, and air barrier property of the paper were improved 60.2%, 45.8%, 15.5%, 148.1%, and 79.4%, respectively. The calendering-based papermaking process involving the combined use of wood fibers and polylactic acid fibers would be a promising strategy for designing composite materials for tailorable end-uses.

scholarly journals The Effect of Recycling on Wood-Fiber Thermoplastic Composites

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1750
Author(s):  
Luísa Rosenstock Völtz ◽  
Irangeli Di Guiseppe ◽  
Shiyu Geng ◽  
Kristiina Oksman
Keyword(s):  
Fiber Length ◽  
Interfacial Adhesion ◽  
Processing Time ◽  
Wood Fiber ◽  
Extrusion Process ◽  
Thermoplastic Composites ◽  
Wood Fibers ◽  
Screw Extruder ◽  
Twin Screw ◽  
Number Of Passes

The aim of this study was to investigate the effect of recycling on polypropylene (PP) and wood-fiber thermoplastic composites (WPCs) using a co-rotating twin-screw extruder. After nine extrusion passes microscopy studies confirmed that the fiber length decreased with the increased number of recycling passes but the increased processing time also resulted in excellent dispersion and interfacial adhesion of the wood fibers in the PP matrix. Thermal, rheological, and mechanical properties were studied. The repeated extrusion passes had minimal effect on thermal behavior and the viscosity decreased with an increased number of passes, indicating slight degradation. The recycling processes had an effect on the tensile strength of WPCs while the effect was minor on the PP. However, even after the nine recycling passes the strength of WPC was considerably better (37 MPa) compared to PP (28 MPa). The good degree of property retention after recycling makes this recycling strategy a viable alternative to discarding the materials. Thus, it has been demonstrated that, by following the most commonly used extrusion process, WPCs can be recycled several times and this methodology can be industrially adapted for the manufacturing of recycled products.

scholarly journals Insight into the Surface Properties of Wood Fiber-Polymer Composites

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1535
Author(s):  
Klementina Pušnik Črešnar ◽  
Marko Bek ◽  
Thomas Luxbacher ◽  
Mihael Brunčko ◽  
Lidija Fras Zemljič
Keyword(s):  
Polymer Composites ◽  
Surface Properties ◽  
Wood Fiber ◽  
Antioxidant Properties ◽  
Skin Layer ◽  
Filler Loading ◽  
Attenuated Total Reflection ◽  
Thermoplastic Composites ◽  
Wood Fibers ◽  
Pp Composites

The surface properties of wood fiber (WF) filled polymer composites depend on the filler loading and are closely related to the distribution and orientation in the polymer matrix. In this study, wood fibers (WF) were incorporated into thermoplastic composites based on non-recycled polypropylene (PP) and recycled (R-PP) composites by melt compounding and injection moulding. ATR-FTIR (attenuated total reflection Fourier transform infrared spectroscopy) measurements clearly showed the propagation of WF functional groups at the surface layer of WF-PP/WF-R-PP composites preferentially with WF loading up to 30%. Optical microscopy and nanoindentation method confirmed the alignment of thinner skin layer of WF-PP/WF-R-PP composites with increasing WF addition. The thickness of the skin layer was mainly influenced by the WF loading. The effect of the addition of WF on modulus and hardness, at least at 30 and 40 wt.%, varies for PP and R-PP matrix. On the other hand, surface zeta potential measurements show increased hydrophilicity with increasing amounts of WF. Moreover, WF in PP/R-PP matrix is also responsible for the antioxidant properties of these composites as measured by DPPH (2,2′-diphenyl-1-picrylhydrazyl) assay.

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

The physical properties and morphology of poly-ε-caprolactone polymer blends

1977 ◽  
Vol 21 (11) ◽  
pp. 3035-3061 ◽  
Author(s):  
Douglas S. Hubbell ◽  
Stuart L. Cooper
Keyword(s):  
Physical Properties ◽  
Polymer Blends

scholarly journals Interfacial Aspects of Metal Matrix Composites Prepared from Liquid Metals and Aqueous Solutions: A Review

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1400
Author(s):  
Peter Baumli
Keyword(s):  
Aqueous Solutions ◽  
Physical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Liquid Metals ◽  
Interfacial Phenomena ◽  
Matrix Composites ◽  
Good Adhesion ◽  
Mechanical And Physical Properties ◽  
The Matrix

The paper reviews the preparation of the different metallic nanocomposites. In the preparation of composites, especially in the case of nanocomposites, interfacial phenomena play an important role. This review summarizes the literature on various interfacial phenomena, such as wettability and reactivity in the case of casting techniques and colloidal behavior in the case of electrochemical and electroless methods. The main contribution of this work lies in the evaluation of collected interfacial phenomena and difficulties in the production of metal matrix composites, for both nano-sized and micro-sized reinforcements. This study can guide the composite maker in choosing the best criteria for producing metal matrix composites, which means a real interface with good adhesion between the matrix and the reinforcement. This criterion results in desirable mechanical and physical properties and homogenous dispersion of the reinforcement in the matrix.

Effect of the delignification of wood fibers on the mechanical properties of wood fiber–polypropylene composites

2006 ◽  
Vol 102 (5) ◽  
pp. 4759-4763 ◽  
Author(s):  
Alinaghi Karimi ◽  
Saleh Nazari ◽  
Ismaeil Ghasemi ◽  
Mehdi Tajvidi ◽  
Ghanbar Ebrahimi
Keyword(s):  
Mechanical Properties ◽  
Wood Fiber ◽  
Wood Fibers ◽  
Polypropylene Composites
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