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Elastic calcium alginate/calcium borate organic-inorganic hybrid material and preparation method thereof

A technology of calcium alginate and hybrid material, applied in the field of hybrid material preparation, can solve the problems of heat resistance temperature limitation, temperature resistance difficulty, unsatisfactory research progress, etc.

Active Publication Date: 2019-04-23
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is a polysaccharide material that undergoes caramelization reaction when exposed to heat, and its thermal decomposition temperature is only 150°C. Such a low heat-resistant temperature is greatly limited in the application of engineering materials.
Therefore, researchers have been looking for ways to improve the heat resistance of calcium alginate materials, but the current research progress is not satisfactory, and it is still difficult to withstand temperatures exceeding 200 °C

Method used

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  • Elastic calcium alginate/calcium borate organic-inorganic hybrid material and preparation method thereof
  • Elastic calcium alginate/calcium borate organic-inorganic hybrid material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Prepare an aqueous solution containing 10% sodium alginate and 5% borax in mass percent, and adjust the pH value to 11.5 with sodium hydroxide;

[0043] (2) adding sodium polyacrylate (molecular weight ≥ 10000), a softening material that accounts for 60% of the mass fraction of sodium alginate, into the above solution;

[0044] (3) Pour the above-mentioned reaction material liquid into the molding equipment, and shape it into blocks, plates, granules, strips, silk threads, films and other shapes according to the application requirements, and enter the three-level gradient concentration coagulation bath to set the shape until the ion exchange reaction is complete; clear water Wash and dry the product.

[0045] The three-level gradient concentration coagulation bath and its technology are as follows: the first-level coagulation bath is a mixed solution of 1% calcium chloride solution and 1% zinc chloride solution, and the treatment time is 1.5h; the second-level coagu...

Embodiment 2

[0050] The difference from Example 1 is that 10% sodium alginate is replaced by 1%, and 5% borax is replaced by 0.1%.

[0051] The thermal decomposition temperature of the elastic calcium alginate / calcium borate organic-inorganic hybrid material prepared by the above method is 200°C, which is 20°C higher than that of ordinary calcium alginate samples, the limiting oxygen index is 30.1, and the wrinkle recovery angle is ≥105°.

Embodiment 3

[0053] The difference from Example 1 is: 10% sodium alginate is replaced by 20%, 5% borax is replaced by 5% borax and 5% boric acid mixed solution, sodium polyacrylate is replaced by water-soluble self-crosslinking polyurethane solution, the mass The percentage accounts for the mass fraction of sodium alginate as 100%.

[0054] The thermal decomposition temperature of the elastic calcium alginate / calcium borate organic-inorganic hybrid material prepared by the above method is 236°C, which is 56°C higher than that of ordinary calcium alginate samples, the limiting oxygen index is 34, and the wrinkle recovery angle is 153°.

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Abstract

The invention discloses an elastic calcium alginate / calcium borate organic-inorganic hybrid material and a preparation method thereof, relating to the technical field of the preparation of hybrid materials. The preparation method comprises the following steps: firstly mixing sodium alginate with a calcium borate pecursor solution, adding a softening material into the mixed solution, and uniformly stirring, so as to obtain a reaction material solution; and finally, pouring the reaction material solution into foaming equipment to form a required shape, putting the formed material into a coagulating bath for shaping until ion exchange reaction is finished, cleaning with clean water, and drying, so as to obtain the calcium alginate / calcium borate organic-inorganic hybrid material. The calcium alginate / calcium borate organic-inorganic hybrid material can resist a high temperature of 200 DEG C, the limiting oxygen index (LOI) is more than or equal to 30, the wrinkle recovery angle is more than or equal to 100 degrees, and the hybrid material can meet the requirements of environment-friendly ocean biomass function materials with the performance of fire resistance, thermal insulation, elasticity, damping and the like and can meet the mass requirements of flame-resistant materials with damping and thermal insulation performance in the occasions of retirement homes, nursery schools, entertainment, military equipment and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of hybrid materials, in particular to a calcium alginate / calcium borate organic-inorganic hybrid material and a preparation method thereof. Background technique [0002] The 21st century is the century of the ocean. The development and utilization of marine resources has been valued by many countries in the world, especially developed countries. my country has a long coastline, a vast sea area, and rich marine resources. It also attaches great importance to the development of marine resources. For example, as a marine plant, kelp has an annual regeneration capacity of more than 15 million tons. my country is rich in seaweed resources, with an annual output of more than 7 million tons, accounting for more than half of the world's total output. Among them, in 2015, my country's kelp output reached 1.32 million tons, accounting for more than 90% of the world's total output, and has a huge resou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/04C08L1/28C08L33/02C08L75/04C08K3/38
CPCC08K2003/387C08L5/04C08L2201/02C08L33/02C08K3/38C08L75/04C08L1/286
Inventor 李子超李群李晓雯王越赵婉婷刘璇
Owner QINGDAO UNIV