A Compatible Interface of Wheat Straw/Polylactic Acid Composites Collaborative Constructed Using KH570–Nano TiO2

2022 ◽  
Author(s):  
Kang Chen ◽  
Chenggang Liao ◽  
Ping Li ◽  
Xingong Li ◽  
Xianjun Li ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Polylactic Acid ◽  
Nano Tio2

scholarly journals Effect of Intercalation Structure of Organo-Modified Montmorillonite/Polylactic Acid on Wheat Straw Fiber/Polylactic Acid Composites

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 896 ◽  
Author(s):  
Qiqi Fan ◽  
Guangping Han ◽  
Wanli Cheng ◽  
Huafeng Tian ◽  
Dong Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermogravimetric Analysis ◽  
Wheat Straw ◽  
Polylactic Acid ◽  
Low Cost ◽  
Interlayer Spacing ◽  
Positive Influence ◽  
X Ray Diffraction ◽  
Ft Ir ◽  
Ir Analysis

In this work, an easy way to prepare the polylactic acid (PLA)/wheat straw fiber (WSF) composite was proposed. The method involved uses either the dopamine-treated WSF or the two-step montmorillonite (MMT)-modified WSF as the filler material. In order to achieve the dispersibility and exfoliation of MMT, it was modified by 12-aminododecanoic acid using a two-step route. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were performed to characterize the modified MMT and the coated WSF. As for the properties of PLA/WSF composites, some thermal (using Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis) and mechanical properties (flexural, tensile, and impact) were analyzed. The results showed that the dopamine was successfully coated onto the WSF. Furthermore, Na-MMT was successfully transformed to organo-montmorillonite (OMMT) and formed an exfoliated structure. In addition, a better dispersion of MMT was obtained using the two-step treatment. The interlayer spacing of modified MMT was 4.06 nm, which was 123% higher than that of the unmodified MMT. Additionally, FT-IR analysis suggested that OMMT diffused into the PLA matrix. The thermogravimetric analysis (TGA) showed that a higher thermal stability of PLA/WSF composites was obtained for the modified MMT and dopamine. The results also showed that both the dopamine treated WSF and the two-step-treated MMT exhibited a positive influence on the mechanical properties of PLA/WSF composites, especially on the tensile strength, which increased by 367% compared to the unmodified precursors. This route offers researchers a potential scheme to improve the thermal and mechanical properties of PLA/WSF composites in a low-cost way.

Preparation and characterization of foamed wheat straw fiber/polypropylene composites based on modified nano-TiO2 particles

2020 ◽  
Vol 128 ◽  
pp. 105674 ◽  
Author(s):  
Dong Wang ◽  
Lihui Xuan ◽  
Guangping Han ◽  
Andrew H.H. Wong ◽  
Qingxiang Wang ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Nano Tio2 ◽  
Polypropylene Composites ◽  
Tio2 Particles

scholarly journals Wheat straw pre-treatments using eco-friendly strategies for enhancing the tensile properties of bio-based polylactic acid composites

2020 ◽  
Vol 155 ◽  
pp. 112836
Author(s):  
Mehdi Chougan ◽  
Seyed Hamidreza Ghaffar ◽  
Mazen J. Al-Kheetan ◽  
Mantas Gecevicius
Keyword(s):  
Wheat Straw ◽  
Tensile Properties ◽  
Polylactic Acid

Interfacial modified unidirectional wheat straw/polylactic acid composites

2020 ◽  
pp. 152808372091817
Author(s):  
Wuzhou Li ◽  
Liangang Zheng ◽  
Defang Teng ◽  
Dongsheng Ge ◽  
Farial I Farha ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Polylactic Acid ◽  
Bending Strength ◽  
Good Mechanical Property ◽  
Compression Method ◽  
Thermal Compression ◽  
Biodegradable Composite ◽  
The Matrix ◽  
Microscopy Images ◽  
Modification Treatment

Among the agricultural crops, wheat is one of the most important and broadly planted food crops. However, abundant wheat straw resources were used to incinerate, which was a great waste of fiber resources, and meanwhile caused great pollution to the ecological environment. In this work, a simple hot compress method that used intact wheat straw with different volume fractions (20% and 30%) as a filler to reinforce the polylactic acid resin was explored to prepare a biodegradable composite by thermal compression method. Initially, the compressed wheat straw exhibited excellent tensile strength (96.86 MPa), even higher than intact wheat straw (92.18 MPa). The surface modification treatment was carried out with 2% and 4% concentrations of sodium hydroxide (NaOH). Then the tensile and bending strength of the modified wheat straw/polylactic acid composites were 32.41 MPa and 78.52 MPa, which were 22.16% and 22.44% higher than those of the untreated composites. The scanning electron microscopy images of the surface of modified wheat straw and fractured composite cross section revealed significantly rougher surface morphology and stronger interfacial bonding with the matrix. This work demonstrated the feasibility and good mechanical property of the composites reinforced with intact wheat straw by simple hot compression method, which provided a possible strategy to utilize the straw materials for multiple applications.

Fabrication, Tensile and Bending Properties of Wheat Straw/Polylactic Acid Green Composites

2012 ◽  
Vol 627 ◽  
pp. 715-721
Author(s):  
Li Ying Wu ◽  
Fu Jun Xu ◽  
Peng Wei Zhao ◽  
Yi Ping Qiu
Keyword(s):  
Tensile Strength ◽  
Wheat Straw ◽  
Polylactic Acid ◽  
Bending Strength ◽  
Volume Fraction ◽  
Green Composites ◽  
Hot Press ◽  
Bending Properties ◽  
Volume Fractions ◽  
Hot Press Process

Polylactic Acid (PLA) and raw Wheat Straw (WS) were used to fabricate WS/PLA green composites. By hot-press process, WS/PLA composites with different WS volume fractions (20% and 30%) were obtained. The experimental results showed that when the WS volume fraction was 20%, the composites had a tensile strength of 23.68MPa and modulus of 1.47GPa; bending strength of 64.13MPa and modulus of 1.44GPa. When the WS volume fraction increased to 30%, the tensile strength and modulus enhanced by 45.18% and 35.37% respectively; bending strength and modulus increased by 15.80% and 25.69%. It was indicated that PLA can be successfully reinforced by WS at certain volume fractions.

scholarly journals Effect of sodium alginate on properties of wheat straw/polylactic acid composites

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 6003-6014
Author(s):  
Xuanhao Zhang
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Impact Strength ◽  
Wheat Straw ◽  
Sodium Alginate ◽  
Polylactic Acid ◽  
Moisture Absorption ◽  
Degree Relative ◽  
The Impact ◽  
Scanning Electron

To investigate the effect of sodium alginate (SA) on the properties of wheat straw/polylactic acid (PLA) composites, four kinds of composites with different SA contents (0 wt%, 5 wt%, 10 wt%, and 15 wt%）were prepared via injection molding. The mechanical properties, moisture absorption, thermal stability, and infrared spectrum of the four kinds of composites were tested and analyzed, and the microstructure of the tensile section of the composites was observed via scanning electron microscopy. The degradability of the composites was also analyzed. The results showed that the wheat straw/PLA composites with 5% SA had better mechanical properties. Their tensile strength was 15.8%, 5.4%, and 19% higher than those of 0%, 10%, and 15% SA, respectively. The impact strength of the 5% SA composites changed to an acceptable degree relative to the non-SA composites, which had an impact strength of 28% lower than that of 0% SA but 51.9% higher than that of the 15% SA composite. The 5% SA composites had less hygroscopicity and better thermal stability, and adding SA enhanced the degradability of the composites. As the SA content increased, degradability increased greatly.

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