Effect of special structure of clam shell powder on structure and properties of castor oil‐based composites

Zhang, Peirui; Weng, Fangqing; Koranteng, Ernest; Guo, Duyu; Cao, Pengfei; Wu, Qiangxian

doi:10.1002/app.49963

Cited by 7 publications

(4 citation statements)

References 48 publications

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“…However, more signs of wood powder shedding could be observed on the fractured interfaces shown in Figure 2(C) and (D) for WUF and WPW, respectively, implying that the interfacial interaction force between WF and PP or COPW was relatively weak. These phenomena may be due to the fact that the abundant ─OH groups in WF could only form urethane bond with the ─NCO group in COPU, [11,12,15,17] and also form a hydrogen bond with the ─NH in UF. Consequently, no urethane bond formation could occur between WF and PP or COPW.…”

Section: Water Absorptionmentioning

confidence: 99%

“…Inspired by these reports, [11,12] COPU and wood flour were melt-blended [13] with an internal mixer, and then the obtained material was used to prepare WF-based composite materials with a hot press. It is worth noting that up to 70 wt% of WF biomass was added to COPU for modification so as to make full use of biomass raw materials.…”

Section: Introductionmentioning

confidence: 99%

“…This kind of polyurethane prepolymer can be compounded with other materials by forming chemical bonds to obtain composite materials with better performance. For example, Zhang et al [12] successfully synthesized COPU with a molar ratio of ─NCO to ─OH of 2.0, and prepared a thermoset composite material with clam shell powder as filler with improved mechanical and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of thermosetting wood flour composite material with high biomass content

et al. 2021

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Environmentally friendly materials with high biomass content have always attracted attention. In this work, wood flour (WF), a renewable and environmentally friendly substance was modified by castor oil-based polyurethane prepolymer (COPU) and urea-formaldehyde resin, respectively, to prepare thermoset composites with high biomass content and excellent interface compatibility. A special intensive mixer designed and produced by our laboratory was used for the first time to mix the biobased composites with high viscosity.The WF biomass content of the composites was as high as 70 wt% and the composites were prepared by melt blending and hot pressing. In effect, 70 wt% of WF biomass and 17.5 wt% of castor oil biomass were used to prepare woodplant oil composite with almost 87.5 wt% of biomass. Through infrared spectroscopy (IR), emission scanning electron microscopy (SEM), and thermody-

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Section: Water Absorptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of thermosetting wood flour composite material with high biomass content

et al. 2021

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“…To improve the low efficiency associated with using conventional compatibilizers and coupling agents, our research group has found that using polyurethane prepolymers as a compatibilizer can effectively improve the interfacial compatibility of biomass and polymers with high efficiency. [16][17][18] The high efficiency associated with polyurethane prepolymers is due to the reactivity of NCO terminal groups with polyhydroxy groups in biomass to form covalent bond, as well as physical cross-linking between the soft segments in polyurethane prepolymers and the polymer materials. The formation of chemical bonds and physical cross-links within the composites contribute to improving the interfacial compatibility of the materials.…”

Section: Introductionmentioning

confidence: 99%

Effects of the molecular weight of soft segment of polycaprolactone polyurethane prepolymer on the properties of polyurethane composites with high wood content

Jiang

Koranteng

Xiao

et al. 2023

Journal of Thermoplastic Composite Materials

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Developing green composite with high biomass content is one crucial way to realize the strategy of ‘carbon reduction’. The type of polyurethane prepolymer and its soft segment’s structure have an important influence on the structure and properties of composite materials. This work focused on preparing different kinds of wood powder-polyurethane prepolymer (WCLPU) composite with high biomass content to study the effects of the molecular weight of the soft segment of the polyurethane prepolymer (PCLPU) on the structure and properties of the composites. The results showed that the composite materials with 70 wt% wood content exhibited high strength and good bending performance. Specifically, with decreasing molecular weight of the PCLPU soft segment, the bending strength and bending modulus of the modified WCLPU composite also increased. This work has laid a foundation for studying the effects of the molecular weight of the PCLPU soft segment on the structure and properties of composite materials.

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Study on the Structure and Properties of PBAT‐Based Biocomposite with High Starch Content

Liu,

Jiang,

Weng

et al. 2024

Starch Stärke

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This study uses biodegradable poly(butylene adipate‐co‐terephthalate) (PBAT) and renewable natural polymer corn starch (CS) as raw materials to prepare a high starch content PBAT/CS composite material. The composite is prepared by blending corn starch in a higher proportion with biodegradable PBAT, using polyurethane prepolymer as a compatibilizer. The effects of CS content on the properties of the composites are investigated. The results of SEM show that the interface compatibility between PBAT and CS improves considerably with the addition of PCL‐based polyurethane pre‐polymer (PCLPU). Compared with PBAT/CS composites without PCLPU, the elongation at break of PBAT/CS composites with 10 wt% PCLPU is 31.9% (at the condition of 50% CS content), which is nearly 21 times higher, and the tensile strength is 18.9 MPa, which is almost two times higher. Moreover, the obtained compatible PBAT/CS composites show good thermal and hydrophilic properties. The results demonstrate that the addition of PCLPU compatibilizer has a positive impact on the fabrication of PBAT‐based polymer composites that contain high proportion of biomass. Moreover, PBAT‐based polymer composites with a high starch content hold promising prospects in the realm of biodegradable materials.

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Effect of special structure of clam shell powder on structure and properties of castor oil‐based composites

Cited by 7 publications

References 48 publications

Preparation and characterization of thermosetting wood flour composite material with high biomass content

Preparation and characterization of thermosetting wood flour composite material with high biomass content

Effects of the molecular weight of soft segment of polycaprolactone polyurethane prepolymer on the properties of polyurethane composites with high wood content

Study on the Structure and Properties of PBAT‐Based Biocomposite with High Starch Content

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