Composite fiber, and application thereof in insect-proof net for rice

A composite fiber and insect-proof net technology, which is applied in the field of fiber and its application, can solve the problems of affecting the use effect, uneven distribution of rare earth ions, and the inability of the insect-proof net to completely eliminate the main pests, so as to improve the strength, increase the yield, and increase the insect-proof effect Effect

Active Publication Date: 2018-12-18
JIANGSU HUACHANG YARNS & FABRICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the insect-proof net cannot completely eliminate the main pests of rice such as SBPH and white planthopper
[0003] In addition, studies have shown that rice prefers red light during the growth process. For example, in "The Effect of Different Spectral Energy Distributions on the Growth of Rice Seedlings", the impact of different spectra and composite spectra on rice production is studied. At present, rice insect-proof nets are usually white insect-proof net, the wh

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] 1.1 Preparation of chitosan particles

[0031] Sample 1:

[0032] Step 1: dissolving chitosan with an average molecular weight of 20000KDa in the acetic acid solution of 1mol / L, adding copper stearate and europium chloride for dissolution, the mass ratio of chitosan, copper stearate and europium ions is 1: 0.1:0.02.

[0033] Step 2: Add 0.1 mol / L sodium hydroxide solution dropwise to the mixed solution, so that the pH of the solution is 6.0-8.0.

[0034] Step 3: Concentrate the obtained solution and freeze-dry to obtain chitosan particles.

[0035] Sample 2:

[0036] Step 1: dissolving chitosan with an average molecular weight of 20000KDa in the acetic acid solution of 1mol / L, adding copper stearate and europium chloride for dissolution, the mass ratio of chitosan, copper stearate and europium ions is 2: 0.5:0.05.

[0037] Step 2: Add 0.1 mol / L sodium hydroxide solution dropwise to the mixed solution, so that the pH of the solution is 6.0-8.0.

[0038] Step 3: Con...

Embodiment 1

[0057]Embodiment 1: use the N, N-dimethylformamide and chloroform mixed solvent that volume ratio is 50:50, prepare 10wt% polyurethane solution, the chitosan microparticle of prepared sample 1, the sample prepared in 1.2 part Add the emulsion granule of 4 into the polyurethane solution and stir, mix evenly and then add the solution into the syringe and electrospin to obtain a composite fiber, the chitosan particle weight percentage in the composite fiber is 1wt%, and the emulsion particle in the composite fiber The weight percentage of agent is 0.1wt%.

Embodiment 2

[0058] Embodiment 2: use the N, N-dimethylformamide and chloroform mixed solvent that volume ratio is 50:50, prepare 10wt% polyurethane solution, the chitosan microparticle of prepared sample 2, the sample prepared in 1.2 part Add the emulsion granule of 4 into the polyurethane solution and stir, mix evenly and then add the solution into the syringe and electrospin to obtain a composite fiber, the chitosan particle weight percentage in the composite fiber is 5wt%, the emulsion in the composite fiber The agent weight percentage is 3wt%.

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Abstract

The invention discloses a composite fiber and an application thereof. The composite fiber comprises a fiber matrix material and chitosan particles having a particle diameter of 1-5 [mu]m; the weight percentage of the chitosan particles in the composite fiber is 1-10 wt%; and the chitosan particles are composed of chitosan, copper stearate and europium ions according a mass ratio of (1-2):(0.1-0.5):(0.02-0.05). The insect-proof net has an excellent barrier effect on insects, the addition of emulsifiable granules for preventing rice planthoppers to the fiber can realize long-time ensuring of thepreventive effect of the insect-proof net on the rice planthoppers, and a red spectrum enhancer in the invention can well promote the growth of rice.

Description

technical field [0001] The invention relates to a fiber and its application, in particular to an insect-proof fiber and its application in rice insect-proof nets. Background technique [0002] The application of insect-proof nets to isolate seedlings for rice can not only effectively block rice planthoppers from invading and spreading viruses in seedling fields, but also prevent the use of pesticides during the isolation period, reducing the pollution of chemical pesticides to the environment. It is an effective way to prevent rice diseases and insect pests. "Research on the Application of Insect-proof Nets in Rice Production" pointed out that the anti-insect nets have a 99% anti-insect effect on SBPH, and significantly increase the plant height and tiller number of seedlings. However, insect-proof nets cannot completely eliminate major pests of rice such as SBPH and white planthopper. [0003] In addition, studies have shown that rice prefers red light during the growth p...

Claims

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Application Information

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IPC IPC(8): D01F1/10D01F6/46D01F6/92D01F6/94A01G13/10A01M29/34
CPCA01G13/10A01M29/34D01F1/103D01F6/46D01F6/92D01F6/94
Inventor 李俊叶咏梅
Owner JIANGSU HUACHANG YARNS & FABRICS CO LTD
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