Heat pipe and processing method thereof

Abstract

A heat pipe processing method includes steps of providing a metal tube with openings at two ends, where an inner wall of the metal tube has a capillary structure surface; and oxidizing the capillary structure surface so as to form an oxidized structure surface. In another embodiment, a heat pipe includes is provided, including a metal tube, a working fluid, and a first oxidized structure. An inner wall of the metal tube has a first area. The working fluid is filled in the metal tube. The first oxidized structure is formed on the inner wall defined by the first area, and the working fluid has a first contact angle on the first oxidized structure.

What is claimed is: 
     
         1 . A heat pipe processing method, comprising steps of:
 providing a metal tube with openings at two ends, wherein an inner wall of the metal tube has a capillary structure surface; and   oxidizing the capillary structure surface so as to form a first oxidized structure surface.   
     
     
         2 . The heat pipe processing method according to  claim 1 , wherein a material of the metal tube is copper. 
     
     
         3 . The heat pipe processing method according to  claim 1 , wherein a first contact angle exists between the first oxidized structure surface and a working fluid. 
     
     
         4 . The heat pipe processing method according to  claim 3 , wherein a manner for oxidizing the inner wall of the metal tube further comprises steps of:
 providing an oxidizing solution; and   enabling the oxidizing solution to oxidize an inner wall surface of the metal tube so as to form the first oxidized structure surface.   
     
     
         5 . The heat pipe processing method according to  claim 4 , wherein the oxidizing solution is one selected from a mixed solution of ammonium persulfate and sodium hydroxide, a mixed solution of ammonium persulfate and potassium hydroxide, a mixed solution of potassium persulfate and potassium hydroxide, a mixed solution of potassium persulfate and sodium hydroxide, a mixed solution of sodium persulfate and potassium hydroxide, and a mixed solution of sodium persulfate and sodium hydroxide. 
     
     
         6 . The heat pipe processing method according to  claim 4 , wherein the oxidized structure surface is a surfaced formed of a metal hydroxide or a metal oxide. 
     
     
         7 . The heat pipe processing method according to  claim 4 , further comprising modifying partial area of the first oxidized structure surface by using an chemical solution so as to form a second oxidized structure surface with a long chain structure, wherein the working fluid on the second oxidized structure surface has a second contact angle with the working fluid, and the second contact angle is greater than the first contact angle. 
     
     
         8 . The heat pipe processing method according to  claim 7 , wherein the chemical solution is a diluted solution of fluoroalkylsiloxane, fluoroalkyltrichlorosilane, fluoroalkyldimethylchlorosilane, alkylsiloxane, alkyltrichlorosilane, alkyldimethylchlorosilane or alkyl mercaptan. 
     
     
         9 . The heat pipe processing method according to  claim 7 , wherein the long chain structure is a long chain fluoroalkyl group or long chain alkyl group. 
     
     
         10 . The heat pipe processing method according to  claim 3 , wherein a manner for oxidizing the inner wall of the metal tube is to place the metal tube into an aerobic environment with an oxidizing temperature, and obtaining the first oxidized structure surface after a first oxidizing time. 
     
     
         11 . The heat pipe processing method according to  claim 10 , wherein the oxidizing temperature is 250° C. to 450° C., and the oxidizing time is 0.5 to 6 hours. 
     
     
         12 . The heat pipe processing method according to  claim 11 , further comprising modifying partial area of the first oxidized structure surface by using an chemical solution, so as to form a second oxidized structure surface with a long chain structure, wherein the working fluid on the second oxidized structure surface has a second contact angle with the working fluid, and the second contact angle is greater than the first contact angle. 
     
     
         13 . The heat pipe processing method according to  claim 12 , wherein the chemical solution is a diluted solution of fluoroalkylsiloxane, fluoroalkyltrichlorosilane, fluoroalkyldimethylchlorosilane, alkylsiloxane, alkyltrichlorosilane, alkyldimethylchlorosilane or alkyl mercaptan. 
     
     
         14 . The heat pipe processing method according to  claim 12 , wherein the long chain structure is a long chain fluoroalkyl group or long chain alkyl group. 
     
     
         15 . The heat pipe processing method according to  claim 10 , wherein the first oxidizing temperature is 80° C. to 150° C., and the first oxidizing time is 0 to 10 hours. 
     
     
         16 . The heat pipe processing method according to  claim 15 , further comprising steps of:
 providing an oxidizing solution; and   enabling the oxidizing solution to oxidize the first oxidized structure surface so as to form a second oxidized structure surface, wherein the working fluid on the second oxidized structure surface has a second contact angle, and the second contact angle is smaller than the first contact angle.   
     
     
         17 . The heat pipe processing method according to  claim 16 , wherein the oxidizing solution is one selected from a mixed solution of ammonium persulfate and sodium hydroxide, a mixed solution of ammonium persulfate and potassium hydroxide, a mixed solution of potassium persulfate and potassium hydroxide, a mixed solution of potassium persulfate and sodium hydroxide, a mixed solution of sodium persulfate and potassium hydroxide, and a mixed solution of sodium persulfate and sodium hydroxide. 
     
     
         18 . The heat pipe processing method according to  claim 16 , wherein the second oxidized structure surface is a surface formed of a metal hydroxide or a metal oxide. 
     
     
         19 . A heat pipe, comprising:
 a metal tube, having a first area on an inner wall thereof;   a working fluid, filled in the metal tube; and   a first oxidized structure, formed on the inner wall defined by the first area, wherein the working fluid has a first contact angle on the first oxidized structure.   
     
     
         20 . The heat pipe according to  claim 19 , wherein the first oxidized structure is an oxidized structure formed of a metal hydroxide or a metal oxide. 
     
     
         21 . The heat pipe according to  claim 20 , wherein the inner wall of the metal tube further has a second area and a second oxidized area that is formed on the inner wall defined by the second area; the working fluid has a second contact angle on the second oxidized structure, and the second contact angle is greater than the first contact angle. 
     
     
         22 . The heat pipe according to  claim 21 , wherein the second oxidized structure is a structure surface with a long chain structure. 
     
     
         23 . The heat pipe according to  claim 22 , wherein the long chain structure is a long chain fluoroalkyl group or long chain alkyl group. 
     
     
         24 . The heat pipe according to  claim 19 , wherein a material of the metal tube is copper. 
     
     
         25 . The heat pipe according to  claim 24 , wherein the first oxidized structure is copper oxide or cuprous oxide. 
     
     
         26 . The heat pipe according to  claim 19 , wherein the first oxidized structure is a structure surface with a long chain structure. 
     
     
         27 . The heat pipe according to  claim 26 , wherein the long chain structure is a long chain fluoroalkyl group or long chain alkyl group.