Water-Blown Castor Oil-Based Polyurethane Foams with Soy Protein as a Reactive Reinforcing Filler

Zhang, Shuai; Xiang, Aimin; Tian, Huafeng; Rajulu, A. Varada

doi:10.1007/s10924-016-0914-0

Cited by 52 publications

(42 citation statements)

References 31 publications

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“…The high content of fiber caused a strengthening effect on the polymer matrix. A similar dependence was noted by Zhang et al They used soy protein as a biofiller for RPU foams [57]. The small, closed cell structures that characterize foam with bio-filler also contributed to improvement of mechanical properties.…”

Section: Resultssupporting

confidence: 66%

The Use of Waste from the Production of Rapeseed Oil for Obtaining of New Polyurethane Composites

et al. 2019

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This article presents the results of research on obtaining new polyurethane materials modified by a by-product from vegetable oils industry—rapeseed cake. The chemical composition of rapeseed cake was examined. Rigid polyurethane-polyisocyanurate (RPU/PIR) foams containing a milled rapeseed cake in their composition were obtained as part of the conducted research. Biofiller was added in amount of 30 wt.% up to 60 wt.%. Effects of rapeseed cake on the foaming process, cell structure and selected properties of foams, such as apparent density, compressive strength, brittleness, flammability, absorbability, water absorption, thermal resistance and thermal conductivity are described. The foaming process of RPU/PIR foams modified by rapeseed cake was characterized by a lower reactivity, lower foaming temperature and decrease in dielectric polarization. This resulted in a slowed formation of the polyurethane matrix. Apparent density of RPU/PIR foams with biofiller was higher than in unmodified foam. Addition of rapeseed cake did not have a significant influence on the thermal conductivity of obtained materials. However, we observed a tendency for opening the cells of modified foams and obtaining a smaller cross-sectional area of cells. This led to an increase of absorbability and water absorption of obtained materials. However, an advantageous effect of using rapeseed cake in polyurethane formulations was noted. Modified RPU/PIR foams had higher compressive strength, lower brittleness and lower flammability than reference foam.

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Section: Resultssupporting

confidence: 66%

The Use of Waste from the Production of Rapeseed Oil for Obtaining of New Polyurethane Composites

et al. 2019

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“…An increased apparent density of modified foams may be The incorporation of eucalyptus fibers reduces the cell size of PUR foams, which is more prominent in the case of foams modified with chemically modified fibers (Table 3). This may be connected with the fact that after the chemical modification, the fibers have a more hydrophobic character which promotes a more intense nucleation process and reduces the average size of the cells [5,86,87]. In the case of foams modified with non-treated fibers, most of the pores are in the range of 480-500 µm, while the incorporation of modified fibers leads to foams with a more uniform distribution of cell diameters with an average value in the range of 420-445 µm.…”

Section: Cellular Structure Of Polyurethane Foamsmentioning

confidence: 99%

Effects of Chemically Treated Eucalyptus Fibers on Mechanical, Thermal and Insulating Properties of Polyurethane Composite Foams

et al. 2020

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In this work, rigid polyurethane (PUR) foams were prepared by incorporating 2 wt% of eucalyptus fibers. The eucalyptus fibers were surface-modified by maleic anhydride, alkali, and silane (triphenylsilanol) treatment. The impact of the modified eucalyptus fibers on the mechanical, thermal, and fire performances of polyurethane foams was analyzed. It was observed that the addition of eucalyptus fibers showed improved mechanical and thermal properties and the best properties were shown by silane-treated fibers with a compressive strength of 312 kPa and a flexural strength of 432 kPa. Moreover, the thermal stability values showed the lowest decline for polyurethane foams modified with the silane-treated fibers, due to the better thermal stability of such modified fibers. Furthermore, the flame resistance of polyurethane foams modified with the silane-treated fibers was also the best among the studied composites. A cone calorimetry test showed a decrease in the peak of heat release from 245 to 110 kW∙m−2 by the incorporation of silane-treated fibers. Furthermore, total heat release and total smoke release were also found to decrease remarkably upon the incorporation of silane-treated fibers. The value of limiting oxygen index was increased from 20.2% to 22.1%. Char residue was also found to be increased from 24.4% to 28.3%. It can be concluded that the application of chemically modified eucalyptus fibers has great potential as an additive to incorporate good mechanical, thermal, and fire properties in rigid polyurethane foams.

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“…In addition to food application areas, soy protein based biomaterials are attracting more and more attention for their eco‐friendly characters . Pure soy protein possesses poor thermoplasticity due to the abundant hydrogen bonding interactions . Through incorporating small molecular plasticizers, the thermal plasticity as well as the melt flow ability could be well improved, and the flexibility of the resulting films would be enhanced .…”

Section: Introductionmentioning

confidence: 99%

Nanoclay incorporation into soy protein/polyvinyl alcohol blends to enhance the mechanical and barrier properties

Guo

Tian

2019

Polymer Composites

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To enhance the mechanical and water barrier properties of soy protein isolate (SPI/)/polyvinyl alcohol (PVA) blends, montmorillonite (MMT), as a layered silicate clay was incorporated and SPI/PVA/MMT composite films were successfully prepared by melt processing in this work. The results showed that the structure of the composites was highly dependent on the MMT content. MMT nanofillers could act as the heterogeneous nucleating agent for PVA, which accelerated the crystallization and increased the size distribution of the crystalline. With the increase of MMT content, the tensile strength and Young's modulus of the composites increased, exhibiting the fine reinforcing effect. Due to the effective restriction of the highly disordered MMT lamellae on the matrix segment, the water sensitivity of the composites decreased and at the same time, the thermal stability improved. The resulting nanocomposite films exhibited wide applications as biodegradable materials, green packaging films, etc. POLYM. COMPOS., 40:3768-3776, 2019. POLYMER COMPOSITES-2019 FIG. 8. The TGA (a) and DTG (b) curves of SPI/PVA/MMT composite films. [Color figure can be viewed at wileyonlinelibrary.com]

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Water-Blown Castor Oil-Based Polyurethane Foams with Soy Protein as a Reactive Reinforcing Filler

Cited by 52 publications

References 31 publications

The Use of Waste from the Production of Rapeseed Oil for Obtaining of New Polyurethane Composites

The Use of Waste from the Production of Rapeseed Oil for Obtaining of New Polyurethane Composites

Effects of Chemically Treated Eucalyptus Fibers on Mechanical, Thermal and Insulating Properties of Polyurethane Composite Foams

Nanoclay incorporation into soy protein/polyvinyl alcohol blends to enhance the mechanical and barrier properties

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