Preparation of a Crosslinked Chitosan Coated Calcium Sulfate Whisker and Its Reinforcement in Polyvinyl Chloride

Cui, Jiayang; Cai, Yanfei; Wang, Yuan; Lv, Zhen; Xu, Shiai

doi:10.1016/j.jmst.2016.06.006

Cited by 31 publications

(16 citation statements)

References 26 publications

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“…Calcium sulfate whiskers (CSW) were artificial crystals, which were commonly used to modify the strength of composites [19][20][21][22][23]. For example, in the study of the mechanical properties of CW-enhanced modification, the modified CSW has a strong interfacial bond with the PVC matrix [22], and CSW could effectively improve the thermal stability of the material [23].…”

Section: Introductionmentioning

confidence: 99%

Study on Blending of Wall Material of the Nonel Tube by CSW/PE-g-MAH

Zhang

Yang

et al. 2019

Journal of Analytical Methods in Chemistry

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In order to improve the strength and resistance of ordinary nonel tubes, calcium sulfate whiskers (CSW, treated with silane coupling agent) and maleic anhydride grafted polyethylene (PE-g-MAH) are used to control the wall material of the nonel tube that the blending of the low-density polyethylene was enhanced. The effects of mass fraction of CSW or PE-g-MAH on the tensile properties, interfacial structure, melting and crystallization characteristics, and thermal decomposition behavior of the composite system were studied, and the thermal decomposition kinetics were calculated. The results show that, relative to pure LDPE, the strength of LDPE/CSW (85/15) is increased by 7.58%, and the strength of LDPE/CSW/PE-g-MAH (84/15/1) is increased by 7.58%. The addition of CSW or PE-g-MAH has gradually changed the fracture mode of the LDPE matrix. Thermal analysis shows that CSW can reduce the crystallinity of LDPE. The melting and crystallization characteristics of LDPE/CSW/PE-g-MAH composites have little effect, but the thermal decomposition stability is improved. The kinetic analysis showed that the reaction order (n) was around 1, CSW could improve LDPE/CSW thermal decomposition activation energy, and PE-g-MAH increased the thermal decomposition activation energy of LDPE/CSW/PE-g-MAH.

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Section: Introductionmentioning

confidence: 99%

Study on Blending of Wall Material of the Nonel Tube by CSW/PE-g-MAH

Zhang

Yang

et al. 2019

Journal of Analytical Methods in Chemistry

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“…[31][32][33] Recently, Yuan and Cui et al found that CSWs coated by crosslinked polyvinyl alcohol (PVA) or chitosan (CS) greatly improved the tensile and impact properties of CSW/PVC composites, which could be attributed to the good affinity between PVC and PVA or CS molecules coated on the surface of CSWs. 17,23,[34][35][36] Coupling agents are usually used to modify the inorganic llers to improve their interfacial strength with polymers, 37,38 and the most commonly used coupling agents for this purpose include silane coupling agents, 39,40 titanate coupling agents 41,42 and fatty acids. 43 Monte and Sugerman…”

Section: Introductionmentioning

confidence: 99%

Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride) composites

Zhang

et al. 2017

RSC Adv.

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Six new polyether titanate coupling agents with different polyethyleneglycol (PEG) segment lengths were prepared in this study and were then used to modify calcium sulfate whiskers (CSWs) in order to improve the compatibility between CSWs and poly(vinyl chloride) (PVC). The chemical structure of these coupling agents was characterized by FTIR, Raman, 1 H NMR and 31 P NMR, and the surface properties of CSWs modified by the coupling agents (mCSWs) were characterized by FTIR, SEM-EDS and XPS. Then, CSW/ PVC and mCSW/PVC composites were prepared using a two-roll mill, and their mechanical and thermal properties were characterized to investigate the effects of the PEG segment length of the coupling agents on the performance and compatibility of the composites. The results show that the new coupling agents can significantly improve the compatibility and the interfacial adhesion between CSWs and the PVC matrix, which results in a significant improvement of the comprehensive performance of mCSW/ PVC composites. PEG4000 shows the best modification effect on CSWs. Finally, the underlying mechanisms are discussed.

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“…With 15% of M-C-CSW, the viscosity at 15°C and 60°C was 1270 mPa s and 53 mPa s, respectively, indicating that temperature has a great influence on viscosity. Thus, by changing the temperature, the viscosity can be adjusted to satisfy different printing requirements; the effect of CSW on viscosity is smaller that that of other inorganic fillers [31].…”

Section: Hybrid Photopolymers For 3d Printingmentioning

confidence: 99%

“…Here, CS-coated whiskers were successfully modified with acryloyl chloride, to improve compatibility between fillers and photopolymers. The double bonds produced by the reaction can participate in the polymerization of the hybrid resin [30,31]. Fourier transform infrared spectroscopy (FTIR) was conducted to characterize the groups on the surface of whiskers.…”

Section: Introductionmentioning

confidence: 99%

Effect of modified calcium sulphate whiskers on free-radical/cationic hybrid photopolymers for 3D printing

Jiao

Lin

Liu

et al. 2020

Mater. Res. Express

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This study presents and evaluates hybrid photopolymers applied to 3D printing. To obtain the hybrid system, epoxy acrylates (EA), epoxy resins and photoinitiators were compounded. As inorganic fillers are traditionally used to improve mechanical properties, calcium sulphate whiskers (CSW) coated with chitosan (CS) were modified by acryloyl chloride and the effects of the modification on hybrid photopolymers were investigated. The viscosity and volume shrinkage of the hybrid system were also evaluated. Fourier transform infrared measurements showed that hybrid photopolymers had a higher conversion. Meanwhile, the mechanical properties showed that the tensile strength of the cured samples containing 7% modified CSW was increased by 28% compared to that of pure resin. Additionally, the improvement of interface interaction between modified whiskers and hybrid photopolymers was observed by a scanning electron microscope. Dynamic mechanical analysis showed that the hybrid system, with the addition of 7% modified whiskers, exhibited a higher storage modulus and crosslinking density. This work, the first to use modified CSW on 3D printing to enhance the tensile strength of hybrid photopolymers, demonstrates that the photocured samples can contribute to high accuracy and resolution.

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Preparation of a Crosslinked Chitosan Coated Calcium Sulfate Whisker and Its Reinforcement in Polyvinyl Chloride

Cited by 31 publications

References 26 publications

Study on Blending of Wall Material of the Nonel Tube by CSW/PE-g-MAH

Study on Blending of Wall Material of the Nonel Tube by CSW/PE-g-MAH

Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride) composites

Effect of modified calcium sulphate whiskers on free-radical/cationic hybrid photopolymers for 3D printing

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