Coffee lubricant having nanoparticles

Abstract

A coffee lubricant having nanoparticles is provided. It consists of 36 to 40 wt % of glycerin, 1 to 7 wt % of gum arabic, 0.3 to 1.3 wt % of nanoparticles, and remaining part of coffee biofuel. In which, the nanoparticles are CuO. The coffee biofuel is extracted from coffee dregs and has a viscosity of 60 to 70 cSt at a temperature of 40 degrees Celsius. It can reduce the friction coefficient and operating temperature. In addition, it can replace the mineral oil.

Claims

1. A coffee lubricant consisting of: [a] 36 to 40 wt % of glycerin; [b] 1 to 7 wt % of gum arabic; [c] 0.3 to 1.3 wt % of nanoparticles; and [d] remaining part of coffee biofuel; wherein said nanoparticles are CuO; said coffee biofuel is extracted from coffee dregs and has a viscosity of 60 to 70 cSt at a temperature of 40 degrees Celsius.

2. The coffee lubricant as defined in claim 1, wherein: said coffee biofuel is 58.6 wt %; said glycerin is 39.0 wt %; said gum arabic is 2.0 wt %; and said nanoparticles is 0.4 wt %.

3. The coffee lubricant as defined in claim 1, wherein: said coffee biofuel is 58.1 wt %; said glycerin is 38.8 wt %; said gum arabic is 1.9 wt %; and said nanoparticles is 1.2 wt %.

4. The coffee lubricant as defined in claim 1, wherein: said coffee biofuel is 55.7 wt %; said glycerin is 37.1 wt %; said gum arabic is 6.1 wt %; and said nanoparticles is 1.1 wt %.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The FIGURE shows the relationship between the time and the friction coefficient of the preferred embodiments in this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

(2) The present invention is a coffee lubricant having nanoparticles. It comprises: [a] 3640 wt % of glycerin; [b] 17 wt % of gum arabic; [c] 0.31.3 wt % of nanoparticles; and [d] remaining part of coffee biofuel;

(3) In which, the nanoparticles are CuO. The coffee biofuel is extracted from coffee dregs and has a viscosity of 6070 cSt at a temperature of 40 degrees Celsius.

(4) Practically, about the Example 1 of this invention, the coffee biofuel is 58.6 wt %; the glycerin is 39.0 wt %; the gum arabic is 2.0 wt %; and the nanoparticles is 0.4 wt %.

(5) Practically, about the Example 2 of this invention, the coffee biofuel is 58.1 wt %; the glycerin is 38.8 wt %; the gum arabic is 1.9 wt %; and the nanoparticles is 1.2 wt %.

(6) Practically, about the Example 3 of this invention, the coffee biofuel is 55.7 wt %; the glycerin is 37.1 wt %; the gum arabic is 6.1 wt %; and the nanoparticles is 1.1 wt %.

(7) Please refer to the following Table 1, it shows the detailed composition of the Examples 1, 2, and 3 of this invention.

(8) TABLE-US-00001 TABLE 1 CuO Coffee biofuel glycerin gum arabic nanoparticles Item (g) (g) (g) (g) Example 1 15.00 10.00 0.5 0.1 Example 2 15.00 10.00 0.5 0.3 Example 3 15.00 10.00 1.64 0.3

(9) The information in Table 1 can be converted into the weight percentage (wt %), as shown in Table 2.

(10) TABLE-US-00002 TABLE 2 CuO Coffee biofuel glycerin gum arabic nanoparticles Item (wt %) (wt %) (wt %) (wt %) Example 1 58.6 39.0 2.0 0.4 Example 2 58.1 38.8 1.9 1.2 Example 3 55.7 37.1 6.1 1.1

(11) With regard to the method to produce this invention, it is described as follows.

(12) [step 1] Keep the room temperature at 25 degrees Celsius. Filter the coffee biofuel (that is extracted from coffee dregs) and then a filtered coffee biofuel of a required weight can be obtained.

(13) [step 2] Add surfactant (the gum arabic) into the filtered coffee biofuel and mix them well by stirring.

(14) [step 3] Add glycerin into the mixture obtained from the previous step and mix them well by stirring.

(15) [step 4] Heat up the mixture obtained from the previous step to 80 degrees Celsius with proper stirring.

(16) [step 5] Cool down to 40 degrees Celsius and check its viscosity in the range of 6070 cSt or not.

(17) [step 6] If not, repeat from step 4 until the required viscosity is obtained.

(18) About the nanoparticles, it can be added before Step 4 (such as added in Step 2 or Step 3 while stirring).

(19) About the experiment of this invention, it is based on an abrasion testing machine that utilizes a ring and a disk under a line contact movement. During the abrasion testing, a specific load (such as 60 N) and a specific rotation speed (such as 80 rpm) is set. Then, many testing results (such as the friction coefficient and the temperature) can be measured and recorded.

(20) Referring to the FIGURE, it shows the actual abrasion resting results of the traditional mineral oil and this invention under three different mixing conditions (Examples 1, 2, and 3).

(21) In the FIGURE, the X-axis means time and the Y-axis means the friction coefficient (or called coefficient of friction). The label L0 is the data of the traditional mineral oil. Labels L1 to L3 are the data of the Examples 1 to 3 (or called formula 1 to 3) of this invention.

(22) Based on the FIGURE, after twenty minutes, the friction coefficients of the Examples 1, 2, and 3 are all better than the one of the traditional mineral oil. Especially, the Example 1 (or formula 1) is the best.

(23) About the nanotechnology, it is well developed during these years. Some papers prove that the nanotechnology applied in the abrasion is able to improve the abrasion problem.

(24) Therefore, this invention can reduce the friction coefficient of the working machine. Hence, it can decrease the heat generated caused by the friction. So, the product life of such machine or machine parts can be prolonged.

(25) Also, this invention can replace the traditional mineral oil. Thus, it can reduce the crude oil over-exploitation and related refining processes, as well as to lower the air pollution.

(26) The advantages and functions of this invention can be summarized as follows.

(27) [1] The nanoparticles can reduce the friction coefficient and operating temperature. In this invention, because it can reduce the friction coefficient, the heat generated by the friction is decreased accordingly. Furthermore, it can prolong the product life of the machine or machine parts.

(28) [2] It can replace the mineral oil. This invention can replace the mineral oil, so it can reduce the crude oil over-exploitation and related refining processes, as well as to lower the air pollution.

(29) The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the claims of the present invention.