Research on Properties of PBAT/CaCO3 Composite Films Modified with Titanate Coupling Agent

Liu, Zhekun; Meng, Fantao; Tang, Xianggang; Su, Chengzhuang; Mu, Quanquan; Ju, Guannan

doi:10.3390/polym15102379

Cited by 11 publications

(1 citation statement)

References 53 publications

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“…CaCO 3 has strong toughening and strengthening effects and can significantly improve the bending strength and bending modulus of materials [17] and enhance their thermal stability. Liu [18] designed and prepared PBAT/CaCO 3 composite films with PBAT as the resin matrix and calcium carbonate (CaCO 3 ) as the filler by using a twin-screw extruder and a single screw extrusion blow molding machine. The results showed that the size and content of the CaCO 3 particles significantly influence the tensile properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Mechanical Properties of PBAT/Silanized Cellulose Composites

Wang,

Mo,

Zeng

et al. 2024

Processes

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Polybutylene adipate-terephthalate (PBAT) is a fully biodegradable polyester, which has been proven to be the most suitable alternative to traditional plastics. However, due to the low strength of PBAT (17.2 MPa) and high price, the use of PBAT has a degree of limitations. To obtain a cost-effective and high-performance composite material of PBAT, for this study we selected microcrystalline cellulose, which is inexpensive and easily available, as the reinforcing medium. However, due to the hydrophobicity of PBAT, the mechanical properties of PBAT when mixed with hydrophilic cellulose were low. In order to improve the compatibility of cellulose and PBAT, this study selected hexadecyltrimethoxysilane (HDTMS) containing long carbon chains to silanize microcrystalline cellulose (MCC) to obtain silanized cellulose (SG). Three types of SGs with different degrees of silanization were obtained by controlling HDTMS with different mass ratios (1:10; 3:10; 5:10) to react with MCC. Characterization of these three types of SGs was conducted using FTIR, TEM, and water absorption analysis. The results demonstrated the successful synthesis of SG. With the increase in the reaction ratio of HDTMS and MCC, the size of the nanoparticles increases, and the water absorption decreases significantly. Subsequently, PBAT/SG composites were prepared by blending three kinds of silanized cellulose with PBAT in different proportions by the sol-gel method. To study the thermal stability and compatibility, the mechanical properties of the composites were evaluated, including thermogravimetric testing, scanning analysis, and dynamic thermomechanical testing. The optimal blending ratio and the optimal type of silane cellulose were found. Analysis of the mechanical properties revealed that the tensile strength initially increased and then decreased with increasing blending ratio for all three composites tested. Among them, the PBAT/SG2 composites exhibit superior performance, with a maximum tensile strength reaching 22 MPa at an 85/15 blending ratio, nearly 30% higher than that of pure PBAT alone. The addition of SG significantly improved the strength of the PBAT, and SG2 is more suitable for preparing high-strength composite materials. In addition, after the addition of SG, the yield stress of the composite is improved while maintaining good thermal stability. Both the SEM and DMA results indicated good compatibility of the PBAT/SG composites. This study provides a new idea for the industrial-scale development of degradable polyesters with low cost and good mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Preparation and Mechanical Properties of PBAT/Silanized Cellulose Composites

Wang,

Mo,

Zeng

et al. 2024

Processes

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Surface modification of spherical silica micro‐powder using silane coupling agents and their application in epoxy resin‐based composite materials

Wang,

Yu,

Wang

et al. 2024

J of Applied Polymer Sci

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In recent years, the packaging industry has utilized electronic packaging materials with epoxy resin (EP) and high‐performance fillers, exhibiting superior mechanical properties and thermal conductivity. Spherical silica micro‐powder (SSP) is a critical thermal conductive filler but faces challenges due to its inorganic nature. Surface modification is essential to improve SSP's compatibility and dispersion in organic matrices for effective use in EP‐based composites. In this paper, the effects of the following four modification methods on SSP/EP composites were studied: (1) the processes include co‐modification with dimethyldimethoxysilane (DMDMS) and trimethylethoxysilane (MTES), (2) modification with NaOH, (3) co‐modification with DMDMS and MTES in an alkaline environment after NaOH modification, and (4) co‐modification with methyltrimethoxysilane (MTMS) and propyltrimethoxysilane (PTMOS). Through comprehensive characterization and evaluation, it is evident that modification schemes 1, 3, and 4 significantly enhance SSP's hydrophobicity, dispersibility, and compatibility with EP. This led to the improvement of thermal conductivity and stability of the composite, and modification scheme 4 showed the highest enhancement, with a 42.6% increase in thermal conductivity. Moreover, the mechanical properties of modified composite materials, such as bending strength, impact resistance, and tensile strength, surpass those of unmodified SSP/EP composite materials. The study provides valuable insights for reducing manufacturing costs and enhancing productivity in the electronic packaging sector.

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Titanate coupling agent modified lead sulphide for the manufacture of highly filled flexible neoprene based radiation protection materials

Lu,

Li,

et al. 2024

Polymer Composites

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Based on the principles of photon and matter attenuation, lead sulphide (PbS) has the potential for applications in radiation protection owed to its elevated atomic number and density. Achieving good dispersion stability of PbS powder in highly filled composites remains a challenge due to the inherent nature. Here, we proposed a solution to these issues for highly filled rubber‐based flexible wearable composites. PbS particles were firstly synthesized and subsequently surface‐modified with a titanate coupling agent (NDZ‐201) enhanced the interfacial compatibility with the rubber‐based. Then, highly filled PbS@NDZ‐201/chloroprene rubber (CR) composites were obtained by physical blending. Test results showed that these highly filled composites exhibited even distribution of PbS granule and favorable interface compatibility. All the prepared PbS@NDZ‐201/CR composites exhibit excellent mechanical properties. In comparison to pure CR, the mechanical properties of the 70 wt% filler‐modified powder composites remained at a high level, with a tensile strength of 7.51 MPa and an elongation at break of 670.11%, represented improvements of 155% and 105%, respectively. The mass attenuation coefficient and the γ‐rays shielding coefficients of 70 wt% PbS@NDZ‐201/CR composites reached 34.15% and 36.87%, respectively. In conclusion, this method is feasible for the preparation of highly filled radiation protective rubber‐based flexible wearable materials.Highlights Introduction of PbS in the field of radiation protection. NDZ‐201 improved the interfacial compatibility of PbS with CR. The mechanical properties of the composites were improved after modification by NDZ‐201. Highly filled flexible wearable composites for radiation protection was successfully prepared.

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Research on Properties of PBAT/CaCO3 Composite Films Modified with Titanate Coupling Agent

Cited by 11 publications

References 53 publications

Preparation and Mechanical Properties of PBAT/Silanized Cellulose Composites

Preparation and Mechanical Properties of PBAT/Silanized Cellulose Composites

Surface modification of spherical silica micro‐powder using silane coupling agents and their application in epoxy resin‐based composite materials

Titanate coupling agent modified lead sulphide for the manufacture of highly filled flexible neoprene based radiation protection materials

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