scholarly journals Silane Coupling Agent Modifies the Mechanical Properties of a Chitosan Microfiber

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5292 ◽  
Author(s):  
Yuki Shirosaki ◽  
Toshinobu Okabayashi ◽  
Saki Yasutomi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Crosslinking Agent ◽  
Medical Applications ◽  
Silane Coupling

Chitosan microfibers are widely used in medical applications because they have favorable inherent properties. However, their mechanical properties require further improvement. In the present study, a trimethoxysilane aldehyde (TMSA) crosslinking agent was added to chitosan microfibers to improve their tensile strength. The chitosan microfibers were prepared using a coagulation method. The tensile strength of the chitosan microfibers was improved by crosslinking them with TMSA, even when only a small amount was used (less than 1%). TMSA did not change the orientation of the chitosan molecules. Furthermore, aldehyde derived from TMSA did not remain, and siloxane units were formed in the microfibers.

Effect of a Silane Coupling Agent on Mechanical Properties of Hydroxyapatite/Polycaprolactone Composites

2007 ◽  
Vol 361-363 ◽  
pp. 531-534 ◽  
Author(s):  
X.B. Yang ◽  
X. Lu ◽  
J.J. Ge ◽  
Jie Weng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fracture Surface ◽  
Coupling Agent ◽  
Tensile Testing ◽  
Silane Coupling Agent ◽  
Silane Coupling ◽  
Melting And Crystallization Temperatures ◽  
Melting And Crystallization

Silanization of hydroxyapatite was employed to improve the bonding between hydroxyapatite and polycaprolactone. FTIR of HA after silanization showed that new peaks attributed to silane do exist. The increase of melting and crystallization temperatures of silaned composites shown from DSC implied that there exists much stronger bonding between PCL and silaned HA particles. Fracture surface of composites after tensile testing observed by using SEM showed that silaned HA particles dispersed much evenly and coalesced compactly in PCL matrix, suggesting that silaned HA particles had good compatibility with PCL. The tensile strength and modulus increased from 16.81 MPa and 239.21 MPa to 20.49 MPa and 539.57 MPa, respectively.

scholarly journals Effects of Crosslinking and Silicone Coupling Agent on Properties of EVA Composite Hot Melt Adhesive

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4101
Author(s):  
Zijin Wu ◽  
Yonggang Shangguan ◽  
Chunhui Zhang ◽  
Qiang Zheng
Keyword(s):  
Tensile Strength ◽  
Shear Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Crosslinking Agent ◽  
Ethylene Vinyl Acetate ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Silane Coupling ◽  
Hot Melt

In order to improve the bonding performance, EVA composite hot melt adhesives were prepared by introducing crosslinking agent and silane coupling agent in this paper. A binary EVA resin blend as the base resin with appropriate viscosity and tensile shear strength was selected as hot melt adhesive. The effects of crosslinking agent and silane coupling agent on the properties of ethylene/vinyl acetate (EVA) composite hot melt adhesive were studied. By investigating the preparation and curing conditions of hot melt adhesive and the properties of hot melt adhesive after the introduction of dicumyl peroxide (DCP), the optimum temperature and dosage of DCP and its influence on the properties were determined. It was found that the tensile shear strength of hot melt adhesive increased from 0.247 MPa to 0.726 MPa when 2 phr DCP and 5 phr KH570 were added at the same time. The tensile strength and tensile shear strength of hot melt adhesive are only slightly improved when silicone coupling agents with different functional groups are added to EVA composite hot melt adhesive. However, it was found that excessive silane coupling agent would significantly reduce the tensile strength and shear peel strength of the material.

Effect of Polymeric Coupling Agent on Mechanical Properties of Kenaf Fiber / Polystyrene Composites

2012 ◽  
Vol 268-270 ◽  
pp. 127-133
Author(s):  
Chen Zheng ◽  
Yan Yan Xu ◽  
Takahiko Kawai ◽  
Shin-ichi Kuroda
Keyword(s):  
Mechanical Properties ◽  
Water Uptake ◽  
Uptake Rate ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Solvent System ◽  
Kenaf Fiber ◽  
Silane Coupling ◽  
Polymeric Silane ◽  
Remarkable Reduction

In order to improve the properties and the processability of kenaf fiber (KF) / polystyrene (PS) composites, the newly synthesized polymeric silane coupling agent (CA) was utilized and evaluated. KFs were reacted with CA in the melt system and in the solvent system. The composites reinforced by the modified KF showed enhanced mechanical properties compared with those reinforced by the unmodified KF. The effect was especially remarkable when the KF was modified with CA in the solvent system. As the CA content increases, the surface of KF recovered from the composites showed the higher Si / C ratio indicating the good reaction between KF and CA. The modified composites also showed a remarkable reduction in water uptake rate.

Study on the Application of Silane Coupling Agent in Rice Straw/Poly(butylene Succinate) Composites

2011 ◽  
Vol 675-677 ◽  
pp. 361-364 ◽  
Author(s):  
Yang Zhao ◽  
Jian Hui Qiu ◽  
Hui Xia Feng ◽  
Guo Hong Zhang ◽  
Liang Shao
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Rice Straw ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Fracture Strain ◽  
Molding Machine ◽  
Butylene Succinate ◽  
Silane Coupling ◽  
Properties Of Composites

Rice straw/Poly(butylene succinate)(PBS) composites were prepared by injection molding machine. The influence of content and particle size of rice straw on the mechanical properties of composites indicated that with the increase of rice straw content the tensile strength and fracture strain of the composites was decreased. With the same content of rice straw, the smaller particle size, the more obvious decreased. The influence of dosage of silane coupling agent(SCA) on the composites was studied, the result indicated that with the increase of SCA content, the interface of composite materials significantly improved, the Young’s modulus increased 362% after rice straw was treated by SCA. Thermal analysis showed that the adding of coupling agent didn’t undermine the thermodynamic stability of the composites.

scholarly journals A low-cost and water resistant biomass adhesive derived from the hydrolysate of leather waste

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 4024-4029 ◽  
Author(s):  
Jianfei Zhou ◽  
Teng Xu ◽  
Xiaoling Wang ◽  
Chang Liu ◽  
Xuepin Liao ◽  
...  
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Low Cost ◽  
Crosslinking Agent ◽  
Starting Material ◽  
Collagen Hydrolysate ◽  
Silane Coupling ◽  
Leather Wastes ◽  
Leather Waste

A low-cost and water resistant biomass adhesive was prepared by using collagen hydrolysate extracted from leather wastes as the starting material and silane coupling agent as the crosslinking agent.

Interfacial and Mechanical Properties of Continuous Fiber-Reinforced PP via Pre Impregnated Winding

2017 ◽  
Vol 25 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Jiuqiang Song ◽  
Yan Qin ◽  
Jia Chen ◽  
Siwen Qin
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Glass Fiber ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Fiber Reinforced ◽  
Continuous Glass ◽  
Continuous Glass Fiber ◽  
Glass Fiber Reinforced ◽  
Silane Coupling

In this paper, a continuous glass fiber-reinforced polypropylene prepreg was prepared by fiber treatment with a silane coupling agent and MAH-g-PP resin. Continuous glass fiber-reinforced polypropylene sheets were made from prepreg and PP mats by hot-pressing; they displayed exceptional performance. This paper studies the effects of maleic anhydride grafting on the polypropylene crystallinity and MAH-g-PP content in the prepreg, and the mechanical properties of the composites. The results showed that modifying PP with maleic anhydride decreased the tacticity of the polypropylene molecular chain, which reduced the crystallinity and melting point. An excellent interface formed between the polypropylene and fiber after the glass fiber was treated with a silane coupling agent and MAH-g-PP resin. The mechanical properties of the polymer materials displayed more favorable properties as MAH-g-PP content increased; the ideal MAH-g-PP content was 50%.

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