Studying the continuous wet mixing process based on the silica formula

Zhu, Donglin; Wang, Chuansheng; Xiao, Yao; Wang, Xiaoming; Han, Shuhua; Wang, Zhifei; Bian, Huiguang

doi:10.1002/app.50726

Cited by 9 publications

(7 citation statements)

References 17 publications

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“…Filled rubber mixing technology is divided into dry mixing and wet mixing. [18][19][20] In dry mixing technology, silica and rubber are blended using a mixer, but one-time mixing cannot evenly disperse the highly filled silica in the rubber, resulting in a low mixing efficiency and a great negative influence on the tensile, tear and abrasion resistance of rubber materials. Although the dry mixing technology is simple, but in order to get a good dispersion of rubber composite materials, rubber and the high content of silica have to be mixed repeatedly, and even need to set different temperatures, making the process very tedious.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance of natural rubber latex treatment for silica filled natural rubber composites

Wang

Luo

et al. 2023

J of Applied Polymer Sci

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Natural rubber latex filled with silica can be used to prepare low-cost green tires with low rolling resistance. However, low mixing efficiency and reduction of properties have become the major difficulty in the industry, because there are many polar groups on the surface of silica, and it is difficult to produce a strong interaction with a nonpolar rubber. In this paper, natural rubber latex masterbatch with silica was prepared, and easily mixed with natural rubber (NR) to obtain NR/silica composites. The silica after NRL treated in the rubber matrix characterized with well dispersion, good compatibility with rubber, and composites had weaker Payne effect and higher wet-skid resistance. Meanwhile, the 100% and 300% tensile modulus increased by 8.5% and 14.47%, respectively, notably decreasing heat build-up by 41.88%, compared to the composite prepared by dry mixing technology. Overall, both the dispersion and interfacial adhesion of silica in the rubber matrix have a significant synergistic effect on the properties of rubber composites. The strategy of preparing NR/silica composites provides new research avenues for the preparation of green tires and other rubber industries in the future.

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Section: Introductionmentioning

confidence: 99%

Preparation and performance of natural rubber latex treatment for silica filled natural rubber composites

Wang

Luo

et al. 2023

J of Applied Polymer Sci

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“…Wet mixing of silica-filled natural rubber is a novel method for improving the silica dispersion in the rubber matrix, thereby achieving excellent mechanical properties of the vulcanizates. The silica powder is dispersed prior to mixing with the latex during the wet mixing process, resulting in a more uniform dispersion of the silica filler, with comparatively low energy consumption. , …”

Section: Introductionmentioning

confidence: 99%

“…The silica powder is dispersed prior to mixing with the latex during the wet mixing process, resulting in a more uniform dispersion of the silica filler, with comparatively low energy consumption. 11,12 The two types of wet mixing processes for silica-filled rubber composites are the in situ sol−gel method and the dispersion method. Utrera-Barrios et al studied the effects of mixing methods (conventional and in situ sol−gel methods) for preparing natural rubber (NR) composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Natural Rubber Composites with High Silica Contents Using a Wet Mixing Process

2022

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A wet mixing process is proposed for filled rubber composites with a high silica loading to overcome the drawbacks of high energy consumption and workplace contamination of the conventional dry mixing process. Ball milling was adopted for preparing the silica dispersion because it has a simple structure, is easy to operate, and is a low-cost process that can be easily scaled up for industrial production. The response surface methodology was used to optimize the making of the silica dispersion. The optimum conditions for a well-dispersed silica suspension with the smallest silica particle size of 4.9 mm were an about 22% silica content and 62 h of ball milling. The effects of dry and wet mixing methods on the properties of silica-filled rubber composites were investigated in a broad range of silica levels from low to high loadings. The mixing method choice had little impact on the properties of rubber composites with low silica loadings. The silica-filled rubber demonstrated in this study, however, shows superior characteristics over the rubber composite prepared with conventional dry mixing, particularly with high silica loadings. When compared to silica-filled natural rubbers prepared by dry mixing (dry silica rubber, DSR), the wet mixing (for WSR) produced smaller silica aggregates with better dispersion. Due to the shorter heat history, the WSR exhibits superior curing characteristics such as a longer scorch time (2.2–3.3 min for WSR and 1.0–2.1 min for DSR) and curing time (4.1–4.5 min for WSR and 2.2–3.1 min for DSR). Additionally, the WSR has superior mechanical properties (hardness, modulus, tensile strength, and especially the elongation at break (420–680% for WSR and 360–620% DSR)) over the DSR. The rolling resistance of WSR is lower than that of DSR. However, the reversed trend on the wet skid resistance is observed.

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“…At present, there are many methods to improve the performance of rubber in industrial production. Changing the rubber preparation process is one method to ameliorate rubber properties [29][30][31][32][33][34]. Zhu et al [31] developed continuous wet mixing technology.…”

Section: Introductionmentioning

confidence: 99%

“…Changing the rubber preparation process is one method to ameliorate rubber properties [29][30][31][32][33][34]. Zhu et al [31] developed continuous wet mixing technology. It was found that the continuous wet mixing technology significantly improved the properties of rubber compounds compared with the conventional dry mixing method.…”

Section: Introductionmentioning

confidence: 99%

Study on Increasing the Binding Amount of Rubber and Reinforcing Filler by Adding Aromatic Solvent Oil

Fang

Shen

et al. 2022

Polymers

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The binding amount of rubber and reinforcing filler directly affects the quality of rubber products. The effect of aromatic solvent oil (S-150) on the binding amount of rubber and reinforcing filler was studied. In order to determine the suitability of rubber after adding S-150, the curing characteristics, physical performance and tensile properties of rubber samples were tested and analyzed. Meanwhile, the microstructure of the composite was analyzed by scanning electron microscopy (SEM). The test results showed that the binding amount of rubber and reinforcing filler was increased after adding S-150. The density and Shore A hardness were decreased. When carbon black was 80 phr, after adding 40 phr of S-150, the rebound resilience of rubber increased by 13% on average, and the elongation at break increased by 88% on average. When white carbon black was between 10-70 phr, after adding 65 phr of S-150, the rebound resilience of rubber increased by 9% on average, and the elongation at break increased by 51% on average. Modulus at 100% and tensile strength were decreased. Meanwhile, it could be judged from the microstructure results that the reticulation space inside the rubber was increased, the agglomerate particles were relatively uniform, and no bubbles or holes were observed. The mechanism that S-150 could increase the binding amount of rubber was analyzed according to the like-dissolves-like principle. This research achievement could lead to improvements in the quality of rubber products and promote their practical application.

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Studying the continuous wet mixing process based on the silica formula

Cited by 9 publications

References 17 publications

Preparation and performance of natural rubber latex treatment for silica filled natural rubber composites

Preparation and performance of natural rubber latex treatment for silica filled natural rubber composites

Preparation of Natural Rubber Composites with High Silica Contents Using a Wet Mixing Process

Study on Increasing the Binding Amount of Rubber and Reinforcing Filler by Adding Aromatic Solvent Oil

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