Method for enabling cable to be termite-proof and termite-proof cable

A termite and cable technology, which is applied in the direction of insulating cables, cable/conductor manufacturing, cables, etc., can solve the problems of short protection time, limited protection, secondary pollution, etc., and achieve the effect of improving termite resistance and stability

Inactive Publication Date: 2013-07-24
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sheath can provide protection for a longer period of time, it does not contain drugs and has limited protection; while chemicals are easily affected by the outdoor environment (such as rain washing, exposure to the sun, etc.), the protection time is short, and may cause secondary pollution
Therefore, the effect of conventional termite control methods is very poor when applied to cable control of termites
The existing technology lacks an effective method to improve the termite resistance of finished cables

Method used

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  • Method for enabling cable to be termite-proof and termite-proof cable
  • Method for enabling cable to be termite-proof and termite-proof cable
  • Method for enabling cable to be termite-proof and termite-proof cable

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1 Preparation of termite-resistant cables

[0036] (1) Preparation of photoactive chitosan, the synthesis principle is as follows figure 1 shown, including the following steps:

[0037] S01. PBS solution with pH6.5 and glacial acetic acid are made into the acetic acid solution that volume fraction is 15%, add chitosan, prepare 3% by weight chitosan solution;

[0038] S02. Add 16.8mg of N-(4-azidobenzoyl) succinimide and 8ml of 3% by weight chitosan solution into the mixed solution whose volume ratio of DMF / PBS is 4:1, so that the total volume of the solution is 20ml ;

[0039] S03. Stirring and reacting the solution obtained in S02. in the dark for 48 hours to obtain photoactive chitosan.

[0040] (2) Preparation of termite-resistant cables, such as figure 2 shown, including the following steps:

[0041] S01. First drop the termite medicine onto the surface of the cable sheath, then add the above-mentioned photoactive chitosan, mix well under dark conditio...

Embodiment 2

[0043] Embodiment 2 Synthetic effect analysis of photoactive chitosan

[0044] Such as image 3 As shown in A, in the Raman spectrum, the stretching peak of N-(4-azidobenzoyl) succinimide azido group is at 2055, and the photoactive chitosan is at 2053 cm after synthesis. -1 This peak also appeared, indicating that the photoactive chitosan after synthesis has also taken an azide group; N-(4-azidobenzoic acid group) succinimide is -1 It is a carbonyl group, and after synthesis, the photoactive chitosan is at 1649cm -1 The amide I band appears, and the characteristic peak of carbonyl group is obvious, but chitosan itself has no carbonyl group. The analysis is that the amino group on chitosan and the carboxyl group of 4-azidobenzoic acid synthesize an amide group, showing the stretching activity of carbonyl group, indicating that Photoactive chitosan was synthesized. from image 3The ultraviolet spectrum of B can be seen that the ultraviolet absorption peak of N-(4-azidobenzoy...

Embodiment 3

[0045] Example 3 Analysis of the cable surface grafted with photoactive chitosan and embedded with termite medicine

[0046] (1) Scanning electron microscope

[0047] Such as Figure 4 It can be seen from a that the surface structure of the cable sheath is uneven, and the photoactive chitosan ( Figure 4 After , b), the layered irregular structure appears on the surface of the material and internal voids can be observed, and a three-dimensional structure of cross-linking and branching is formed on the surface, and the drug is embedded ( Figure 4 , c), the surface presents an irregular package shape, and a cross-linked spatial structure also appears, indicating that the drug has been cross-linked and grafted on the cable sheath; Figure d has a flat surface, grafted with photoactive chitosan ( Figure 4 , e) After, the surface is rough and small particles appear, embedding the drug ( Figure 4 , f) After that, a large bag-like structure appeared, and it was in an embedded st...

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Abstract

The invention discloses a method for enabling a cable to be termite-proof and a termite-proof cable. The method for enabling cable to be termite-proof includes the step of grafting optical active chitosan on a protective sleeve of a cable, wherein termite poison is wrapped in the optical active chitosan. By means of the method for enabling the cable to be termite-proof, termite-proof capacity of the cable is improved greatly. By means of the technology of wrapping the termite poison in the optical active chitosan, on one hand, the termite poison is fixedly arranged on the surface of the protective sleeve of the cable perfectly, on the other hand, the termite poison is released slowly, the stability of the termite poison (especially the termite poison with bad chemical stability) is improved, and long-term termite resistance in an environmental friendly manner is achieved.

Description

technical field [0001] The invention belongs to the field of termite control, and more specifically relates to a method for resisting termites in a cable and a termite-resistant cable. Background technique [0002] Termites belong to the order Insecta and Isoptera in the animal kingdom. There are more than 2,000 known species in the world, and they are widely distributed. They exist in most areas of the tropics, subtropics and temperate zones. They feed on wood and cellulose. The reproductive capacity is large, according to the head of insects. Termites have a huge impact on human life and development because of their living habits, and they are potential hidden dangers in construction projects such as bridges, houses and embankments. Every year, the global economic loss caused by termite damage is as high as 100 billion U.S. dollars. The direct economic loss caused by termite damage is 2 billion to 3 billion U.S. dollars every year in the United States, about 200 million e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/22H01B7/18
Inventor 关燕清刘俊明蔡卫卫
Owner SOUTH CHINA NORMAL UNIVERSITY
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