Urea aldehyde group biodegradable polymer sand-fixing material with nutrient controlled release and water absorption and retention functions

A polymer material and biodegradation technology, applied in the field of biodegradable polymer materials, can solve the problems of barrenness, poor water and fertilizer retention capacity, unfavorable plant growth, etc., and achieve the effects of simple process, excellent mechanical properties, and good water and fertilizer environment.

Pending Publication Date: 2022-05-06
ZHONGBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Desertified soil is not conducive to the growth of plants due to its barren, loose soil and poor water and fertilizer retention capacity.

Method used

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  • Urea aldehyde group biodegradable polymer sand-fixing material with nutrient controlled release and water absorption and retention functions
  • Urea aldehyde group biodegradable polymer sand-fixing material with nutrient controlled release and water absorption and retention functions
  • Urea aldehyde group biodegradable polymer sand-fixing material with nutrient controlled release and water absorption and retention functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 3

[0051] A water-absorbing and water-retaining polymer material is corn straw (CS) modified polyacrylic acid (PAA CS ), the inorganic fertilizer is potassium dihydrogen phosphate (KH 2 PO 4 ) and the biodegradable polymer material fabric select the preparation method of the urea aldehyde-based biodegradable sand-fixing material with both slow and controlled release of nutrients and water absorption and water retention functions of polylactic acid (PLA) fabric, comprising the following steps:

[0052] (1) Preparation of methylol urea (MU) solution: add formaldehyde and urea to a closed reaction vessel, the molar ratio of the two is 1:2, then adjust the pH of the solution to 8, and react at 40°C for 2h to obtain MU solution.

[0053] (2) Use KOH to adjust the neutralization degree of acrylic acid AA to 80%, and then sequentially mix the AA solution with a neutralization degree of 80%, pretreated CS, and KH 2 PO 4 and ammonium persulfate are added to the MU solution prepared in...

Embodiment 1

[0058] Obtain the present invention by being coated with PAA CS / KH 2 PO 4 UF-1.5 PLA fabric is a urea aldehyde-based biodegradable polymer sand-fixing material with the functions of sustained and controlled release of nutrients and water absorption and water retention. The tensile strength is 2.42MPa, the water absorption rate is 21.67g / g, and the nutrient element nitrogen Content 6.55wt%, with P 2 o 5 The content of nutrient element P is 0.61wt%, expressed as K 2 The content of nutritional element K calculated as O is 24.97wt%.

Embodiment 2

[0060] Obtain the present invention by being coated with PAA CS / KH 2 PO 4 The urea aldehyde-based biodegradable polymer sand-fixing material prepared by PLA fabric of UF-1 has the functions of slow and controlled release of nutrients and water absorption and water retention. The tensile strength is 2.66MPa, the water absorption rate is 41.59g / g, and the nutrient element nitrogen Content 11.03wt%, with P 2 o 5 The content of nutrient element P is 1.03wt%, expressed as K 2 The content of nutritional element K calculated as O is 21.37wt%.

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Abstract

The invention relates to a urea aldehyde group biodegradable polymer sand-fixing material with nutrient controlled release and water absorption and water retention functions, which is composed of a urea aldehyde group biodegradable polymer composite material with nutrient controlled release and water absorption and water retention functions and a biodegradable polymer material fabric. Wherein the urea aldehyde group biodegradable polymer composite material with the functions of nutrient controlled release and water absorption and water retention is wrapped on the surface of the biodegradable high polymer material fabric and is embedded in a grid of the fabric, and intermolecular hydrogen bond interaction exists between the urea aldehyde group biodegradable polymer composite material and the biodegradable high polymer material fabric. Under the action of water and microorganisms, the sand stabilization material can be gradually hydrolyzed and degraded into micromolecular nutrient substances to be absorbed by plants, and degradation products are free of harmful substances and environmentally friendly. In addition, the fertilizer has excellent mechanical properties, can prevent and consolidate sand and absorb and retain water, and contains nitrogen, phosphorus, potassium and other nutrient elements required by growth and development of plants, thereby providing a good water and fertilizer environment for growth of plants in desert.

Description

technical field [0001] The invention belongs to the technical field of biodegradable polymer materials, and specifically relates to a urea aldehyde-based biodegradable polymer sand-fixing material with the functions of slow and controlled release of nutrients and water absorption and water retention. Background technique [0002] Land desertification has become the greatest threat facing mankind in the 21st century. At present, about 1 / 4 of the world's land area and hundreds of countries and regions are endangered by desertification. Desertification not only causes huge economic losses, but also leads to a series of serious problems that threaten human survival and development, such as a sharp drop in land productivity and deterioration of the natural environment. The area of ​​desertification in our country is large, the distribution is wide, and the harm is serious. Therefore, it is one of the countries that attaches the most importance to desertification control, and ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/22C05C9/02C05G3/40C05G3/80C05G5/16C09K105/00C09K107/00
CPCC09K17/22C05B7/00C05C9/02C05G3/40C05G3/80C05G5/16C09K2105/00C09K2107/00Y02A40/22C05G1/00C09K17/28C09K17/52D06M15/423C05G5/37C09K17/16D06M15/564D06M2101/32D06M2200/00
Inventor 刘亚青仝迎芳陈泰安向阳赵贵哲
Owner ZHONGBEI UNIV
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