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Sugarcane charcoal-based water and fertilizer double-controlled composite slow-release carrier and preparation method thereof

A slow-release carrier and dual-control fertilizer technology, applied in the field of slow and controlled release, can solve the problems of lack of regional environmental adaptability, insufficient performance of slow and controlled release of fertilizers, low actual utilization efficiency of fertilizers in the field, etc., to achieve enhanced Slow and controlled release effect, simple and easy preparation process, low cost effect

Active Publication Date: 2016-02-03
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional slow-release carriers often lack adaptability to regional environments, and their slow-release and controlled-release performance of fertilizers cannot be fully utilized, making the actual use efficiency of fertilizers in the field seriously low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, a kind of preparation method of sugarcane charcoal-based water and fertilizer dual-controlled composite slow-release carrier, comprises the following steps:

[0016] (1) Preparation of sugarcane charcoal matrix: After pulverizing bagasse, put it in a carbonization furnace, heat it to 450-650°C at a heating rate of 5-10°C / min, carbonize for 3-4 hours, grind and sieve, and select materials that can pass 20°C mesh sieve, and sugarcane charcoal that cannot pass through a 100 mesh sieve is used as the carrier matrix;

[0017] (2) Preparation of environment-sensitive microgel emulsion: by weight, take 2.5-5 parts of temperature-sensitive agent, 1-1.2 parts of pH-sensitive agent, 0.1-0.3 part of cross-linking agent, and 160-180 parts of water in the reaction bottle Medium; 300 ~ 600 rpm magnetic stirring and mixing, then add 0.3 ~ 0.4 parts of surfactant; pass in inert gas and stir at 60 ~ 70 ℃ for 20 ~ 30 minutes; 0.2 ~ 0.5 parts The mixed solution of the initi...

Embodiment 2

[0019] Embodiment 2, a kind of preparation method of sugarcane charcoal-based water-fertilizer dual-control compound slow-release carrier, comprises the following steps:

[0020] (1) Preparation of sugarcane charcoal matrix: After pulverizing bagasse, put it in a carbonization furnace, heat it up to 650°C at a heating rate of 10°C / min, carbonize for 4 hours, grind and sieve, select a sieve that can pass through 20 mesh, and can not pass through a sieve. The sugarcane charcoal of 100 mesh sieves is used as carrier matrix, for subsequent use;

[0021] (2) Preparation of environment-sensitive microgel emulsion: by weight, take 5 parts of temperature sensitive agent N,N-diethylacrylamide, 1 part of pH sensitive agent acrylic acid, and 0.15 parts of cross-linking monomer N,N' - Methylenebisacrylamide, dissolved in 160 parts of water, adding 0.2 part of surfactant sodium dodecylsulfonate; feeding inert gas and stirring at 70°C for preheating for 20 minutes; taking 0.5 part of initia...

Embodiment 3

[0023] Embodiment 3, a kind of preparation method of sugarcane charcoal-based water-fertilizer dual-control compound slow-release carrier, comprises the following steps:

[0024] (1) Preparation of sugarcane charcoal matrix: After pulverizing bagasse, put it in a carbonization furnace, heat it up to 850°C at a heating rate of 10°C / min, carbonize for 4 hours, grind and sieve, select a sieve that can pass through a 20-mesh sieve, and cannot pass through a sieve. The sugarcane charcoal of 100 mesh sieves is used as carrier matrix, for subsequent use;

[0025] (2) Preparation of environment-sensitive microgel emulsion: In parts by weight, take 5 parts of temperature sensitive agent N-isopropylacrylamide, 1 part of pH sensitive agent oleic acid, and 0.3 parts of cross-linking monomer N,N'- Methylene bisacrylamide, dissolved in 160 parts of water, adding 0.2 parts of surfactant triton; passing inert gas and stirring at 70 ° C for 20 minutes; taking 0.5 parts of initiator potassium p...

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Abstract

The invention relates to a sugarcane charcoal-based water and fertilizer double-controlled composite slow-release carrier and a preparation method thereof. The composite slow-release carrier comprises the following components in parts by weight: 4-35 parts of sugarcane charcoal, 0-5 parts of a temperature sensitive agent, 0-1.2 parts of a pH sensitive agent, 0.1-0.6 parts of a cross-linking agent, 0.1-0.4 parts of a surfactant, 0.2-0.5 parts of an initiator and 160-200 parts of water. The sugarcane charcoal raw material is renewable, the production cost is low, and operation process is simple. The sugarcane charcoal has abundant nutrient resources such as available nitrogen, phosphor and potassium, and has stable and recyclable comprehensive fertilizer effect; a pH value of the sugarcane charcoal can be adjusted in a scope of 6-11, and the sugarcane charcoal is suitable for acidic soil improvement of sugarcane fields. The provided environment-sensitive microgel-modified composite slow-release carrier can response by following with extraneous environment temperature and change of the pH value, a water / fertilizer integrated sustained and controlled release system is formed through a contraction / swelling process of a microgel high-molecular three-dimensional net structure, water and fertilizer utilization efficiency is fully increased, and an field large-scale application of an environment-friendly continuous fertilizer technology can be promoted.

Description

technical field [0001] The invention relates to a carbon-based composite slow-release carrier and a preparation method thereof, in particular to a sugarcane carbon-based water-fertilizer double-controlled composite slow-release carrier and a preparation method thereof, belonging to the technical field of slow-controlled release. Background technique [0002] High-efficiency slow-release carriers play an important role in enhancing the slow-release of fertilizers, improving fertilizer use efficiency and controlling fertilization in farmland. Traditional slow-release carriers often lack adaptability to regional environments, and their slow- and controlled-release performance of fertilizers cannot be fully utilized, resulting in a serious low utilization efficiency of fertilizers in the field. Compared with traditional slow- and controlled-release carriers, environment-sensitive polymer materials (such as temperature-sensitive hydrogels and pH-sensitive hydrogels) are ideal slo...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 胡朝华袁照年陈如凯
Owner FUJIAN AGRI & FORESTRY UNIV
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