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Ramie fiber grafted cyclobalanopsis glauca tannin material and preparation method thereof

A technology for grafting green oak and ramie fibers, which is applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high material cost, cannot be recycled repeatedly, poor acid and alkali resistance, etc., and achieves a high grafting rate. Effect

Pending Publication Date: 2021-11-09
XICHANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Glutaraldehyde-cured tannin has a strong adsorption capacity, but its disadvantages are poor acid and alkali resistance and small tannin loading capacity. The disadvantage of dipropylene oxide-cured tannin is that the material cost is high, and it is not suitable for industrial applications ( Wang Ru, Liao Xuepin, Zeng Tao et al. Adsorption of Mo(VI) by Collagen Fiber Cured Myrica rubra tannin[J]. Forest Products Chemistry and Industry, 2008,28(2):21-26; Liu Fang, He Chunguang, Liao Xuepin, etc. . Collagen fibers solidified black wattle tannin on La 3+ Study on the adsorption characteristics of [J]. Rare Earth, 2008,29(2):62-65)
Tannins can be cross-linked into macromolecules under the action of aldehydes. Some researchers used acetone to extract tannins for grafting (Jiang Ying. Research on the recovery of rare earths in rare earth tailings in Mianning County [D]. Sichuan Normal University, 2013 ), the disadvantage is that the amount of acetone extractant is large and cannot be recycled repeatedly

Method used

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  • Ramie fiber grafted cyclobalanopsis glauca tannin material and preparation method thereof
  • Ramie fiber grafted cyclobalanopsis glauca tannin material and preparation method thereof
  • Ramie fiber grafted cyclobalanopsis glauca tannin material and preparation method thereof

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preparation example Construction

[0029] The invention discloses a preparation method of ramie fiber grafted Quercus qinggang tannin material, which comprises the following steps:

[0030] Step 1, preparation of tannin solution: naturally air-dry the bark of Quercus qinggang, crush it, and pass it through a 100-mesh sieve for use; take the bark powder of Quercus qinggang, and add acetone and water with a volume ratio of 1:1 into the bark of Quercus qinggang , wherein the mass ratio of Quercus qinggang bark to water was 1:20, and was shaken with a constant temperature oscillator for 24 hours at a temperature of 30°C, then suction filtered and the filtrate was adjusted to 1000mL to prepare a tannin solution.

[0031] Step 2, carry out pretreatment to ramie fiber: use 0.5mol / LHNO to ramie fiber 3 The solution was soaked for 2 hours, wherein the mass ratio of ramie fiber to Quercus qinggang bark powder was 1:25. After the soaking time, the ramie fiber was washed with deionized water to neutrality by using a suctio...

Embodiment 1

[0038] A kind of preparation method of ramie fiber grafting Quercus alba tannin material, comprises the following steps:

[0039] Step 1. Preparation of tannin solution: Air-dry the bark of Quercus qinggang naturally, crush it, and pass it through a 100-mesh sieve for use; accurately weigh 25g of bark powder and put it into it, then measure 500mL of acetone water with a ratio of 1:1 and pour it into In the Erlenmeyer flask, vibrate with a constant temperature oscillator for 24 hours at a temperature of 30°C, then filter with suction and adjust the volume of the filtrate to 1000mL to prepare a tannin solution;

[0040]Step 2, carry out pretreatment to ramie fiber: accurately weigh 1 g of ramie fiber, use 0.5mol / LHNO 3 Soak the solution for 2 hours. After the soaking time, use a suction filter to filter and rinse the ramie fiber with deionized water to neutrality, then soak it with 0.5 mol / L NaOH solution for 2 hours, and use a suction filter to filter it with deionized water. ...

Embodiment 2

[0046] A kind of preparation method of ramie fiber grafting Quercus alba tannin material, comprises the following steps:

[0047] Step 1. Preparation of tannin solution: Air-dry the bark of Quercus qinggang naturally, crush it, and pass it through a 100-mesh sieve for use; accurately weigh 25g of bark powder and put it into it, then measure 500mL of acetone water with a ratio of 1:1 and pour it into In the Erlenmeyer flask, vibrate with a constant temperature oscillator for 24 hours at a temperature of 30°C, then filter with suction and adjust the volume of the filtrate to 1000mL to prepare a tannin solution;

[0048] Step 2, carry out pretreatment to ramie fiber: accurately weigh 1 g of ramie fiber, use 0.5mol / LHNO 3 Soak the solution for 2 hours. After the soaking time, use a suction filter to filter and rinse the ramie fiber with deionized water to neutrality, then soak it with 0.5 mol / L NaOH solution for 2 hours, and use a suction filter to filter it with deionized water. ...

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Abstract

The invention discloses a ramie fiber grafted cyclobalanopsis glauca tannin material and a preparation method thereof. The method comprises the following steps: preparing a tannin solution; pretreating the ramie fibers; and putting the pretreated ramie fibers into a tannin solution, conducting oscillating, adding a formaldehyde solution, conducting oscillating, adding a sulfuric acid solution, conducting oscillating, carrying out suction filtration, washing the grafted ramie fibers, and carrying out vacuum drying on the grafted ramie fibers to obtain the ramie fiber grafted cyclobalanopsis glauca tannin material. According to the method, the grafting rate of cyclobalanopsis glauca tannin can be increased, and the ramie fiber grafted cyclobalanopsis glauca tannin material prepared by the method has adsorbability to metal ions.

Description

technical field [0001] The invention belongs to the technical field of eco-environmental materials, and in particular relates to a ramie fiber-grafted Quercus qinggang tannin material and a preparation method thereof. Background technique [0002] Tannin, also known as tanning, is widely found in plants and is a natural polyphenol compound. In the molecular structure of tannin, there are more ortho phenolic hydroxyl groups. The polyphenolic structure allows tannin molecules to have unique chemical and physiological activities, and can chelate with metal ions, which has antioxidant and free radical capture activities. Wait. Tannin has a wide range of uses and is often used in chemical, food and other industries. Combining tannin with polymer materials can endow polymer materials with new properties and generate new uses. [0003] It is not ideal to directly use tannin to adsorb metal ions, because tannin is easily soluble in water, so people explore other methods to solid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B01J20/32
CPCB01J20/24B01J20/3085B01J20/3071B01J20/32B01J2220/4825
Inventor 姜英
Owner XICHANG COLLEGE
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