Carbon nanotube modified powder natural rubber and method for preparing same

A carbon nanotube modified natural rubber technology, which is applied in the field of carbon nanotube modified powdered natural rubber and its preparation, can solve problems that have not yet been discovered, and achieve the effect of improving mechanical properties

Inactive Publication Date: 2005-09-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, no other related reports on the preparation of CNTs modified nat

Method used

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  • Carbon nanotube modified powder natural rubber and method for preparing same
  • Carbon nanotube modified powder natural rubber and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. First prepare the natural rubber liquid slurry containing CNTs:

[0022] Place the CNTs at a volume ratio of V 硫酸 :V 硝酸 = In the mixed acid solution of 3:1, 1g of CNTs corresponds to 10ml of acid solution, boiled for 30min, washed and dried to obtain acid boiled CNTs. The CNTs processed by acid cooking were observed under a transmission electron microscope (TEM), and compared with the CNTs that had not been processed by acid cooking, such as figure 1 It can be seen that acid boiling treatment can effectively improve the dispersion state of CNTs. Get the CNTs30g that has been processed by acid boiling, and carbon black CB30g (the addition of CB is for compound reinforcement and improved isolation effect, and its addition does not affect the addition of CNTs, and will not affect the improvement effect of CNTs on the performance of powder rubber. In practical application CB may also not be added to CNTs), 3 g of sodium dodecylbenzenesulfonate (SDAS) was added to deio...

Embodiment 2

[0026] Example 2, other conditions are the same as Example 1, the difference is that the dispersant is sodium dodecylsulfonate, the pH value is adjusted using ammonia water, and the parameters shown in Table 1.

Embodiment 3

[0027] Embodiments 3 and 4, except the parameters shown in Table 1, all the other conditions are the same as in Embodiment 1.

[0028] The different parameter contrasts of embodiment 1~4 are shown in Table 1:

[0029]

[0030] The powdered rubbers prepared in Examples 2 to 4 all have good dispersion effect under scanning electron microscope (SEM) observation, and the particle size is round and the particle size is only about 5 μm.

[0031] We used a special mold to compress and vulcanize at elevated temperature to obtain vulcanized rubber containing CNTs. Compared with the traditional powder rubber containing only CB, the mechanical property test results are shown in Table 2.

[0032]

[0033] As can be seen from Table 2, the mechanical properties of the natural rubber composite material prepared by the present invention are significantly improved.

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Abstract

Disclosed is a powder natural rubber modified by carbon nanostructured pipe and the preparing method, relating to the field of modifying macromolecular material with CNTs. Said powder natural rubber is characterized in that it possesses carbon nanostructured pipe which is 1%~50% of the glue of natural latex in mass.The method comprises conducting surface treatment forCNTs to make it hydrophilism: mixing it with dispersant and deionized water and getting the CNTs-water slurry; modifying the pH value to 9~12; mixing with natural latex and getting the natural rubber liquid latex added with CNTs. Then preparing modified powder natural rubber containing CNTs with the method of spray-drying, the quantity of input is 5%~30%, the temperature is 100~180DEG C. The prepared powder rubber is characterized by the adequate distribution of the CNTs in the product, the small size, and the dramatically increased mechanics property compared with the traditional powder rubber.

Description

Technical field: [0001] A carbon nanotube (CNTs) modified powdered natural rubber and a preparation method thereof relate to the technical field of using CNTs for polymer material modification. Background technique: [0002] Since CNTs were first discovered by Japanese scholar Iijima in 1991, they have rapidly become a research hotspot in the field of material science because of their unique structure and excellent performance. Among them, in the field of composite materials, CNTs are widely used for composite material modification. However, compared with a large number of research works on CNTs modified composite materials, there are few reports on the application of CNTs in rubber modification. Yu Ying, Jia Zhijie and others from Central China Normal University reported the research work of preparing CNTs modified EPDM (EPDM) by mechanical mixing method[3]. The results showed that adding CNTs can improve the tensile strength of EPDM, but the fracture The elongation decrea...

Claims

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Application Information

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IPC IPC(8): C08K3/04C08K9/00C08L7/00
Inventor 朱跃峰梁吉王敬东周湘文
Owner TSINGHUA UNIV
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