Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation of hydroxyalkanoate grafting starch copolymer

A technology of hydroxyalkanoate and grafted starch, applied in textiles, papermaking, fiber treatment, etc., can solve the problems of environmental protection of polymeric branched chains, poor degradability, high requirements for production and operation, and more waste water, etc. The effect of strong freezing, environmental friendliness and less waste water

Inactive Publication Date: 2011-02-09
DONGHUA UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems. One is that vinyl monomers have certain volatility and toxicity, which requires high production and operation links and low safety; the other is that vinyl monomers are mainly derived from petroleum products. Although starch is renewable and renewable Degradation, but the environmental protection and degradability of polymerized branched chains are not as good as starch
The third is that some ethylenic monomers need to use more water to react and wash the grafted products in the production of grafted starch slurry, resulting in a lot of waste water

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of Glycolic Acid and 2-Hydroxypropionic Acid Grafted Starch Slurry

[0026] Put 0.125 moles of glycolic acid with a water content of less than 1% and 0.375 moles of 2-hydroxypropionic acid into a closed reactor equipped with a stirrer, water outlet, feeding port, and vacuum port, and add p-toluenesulfonic acid, the amount of p-toluenesulfonic acid 0.003 moles, start stirring, add 20 grams of dry cornstarch with a viscosity of 20mPa.s (containing 0.125 moles of glucose groups), the reactor is heated to 85°C in a constant temperature bath environment, and the vacuum is started to 1300Pa, and the reaction resumes after 2 hours Atmospheric pressure.

[0027] Subsequently, 101 grams of dry cornstarch (containing 0.625 moles of glucose groups) was put into the reactor, stirred evenly, sealed, heated to 95° C., and started to vacuumize to 300 Pa, and the reaction lasted for 4 hours. Return to normal pressure and stop the reaction.

[0028] The graft ratio of the ...

Embodiment 2

[0030] Repeat embodiment 1, have following difference: glycolic acid 0.375 mole, 2-hydroxypropionic acid 0.125 mole, catalyzer is stannous octoate, and its consumption is 0.0075 mole, and starch is tapioca starch.

[0031] The graft ratio of the obtained starch graft copolymer was 20%.

Embodiment 3

[0033] Put 0.125 moles of glycolic acid with a moisture content of less than 1% and 0.375 moles of 2-hydroxypropionic acid into a closed reactor with a stirrer, water outlet, feeding port, and vacuum port, add stannous chloride, and the amount of stannous chloride 0.0075 moles, stir well, add 20 grams of dry potato starch (containing 0.125 moles of glucose groups), and the reactor is heated to 95° C. in a constant temperature bath environment, and starts to vacuumize 300 Pa, and returns to normal pressure after 1 hour of reaction.

[0034] Subsequently, 223 grams of dry potato starch (containing 1.375 moles of glucosyl) was loaded into the reactor, after stirring evenly, it was sealed, the temperature was raised to 85° C., and the vacuum was started to 1300 Pa, and the reaction was carried out for 8 hours. Return to normal pressure and stop the reaction.

[0035] The graft rate of the obtained starch graft copolymer was 10%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
degree of graftingaaaaaaaaaa
degree of graftingaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of hydroxyl alkane acid ester grafting starch multipolymer, comprising the following steps: hydroxyl alkane acid monomers and the starch are mixed according to a mol ratio of 4:1, and the temperature is raised to 85-95 DEG C under the catalyst action, and vacuumizing is carried out and does not stop until a pressure of 300-1300Pa, and the reaction is underway for 1-2 hours, and then vacuumizing is stopped, and the normal pressure is restored; and then the remaining starch is added, and the vacuumizing is carried out and does not stop until a pressure of 300-1300Pa, and the reaction is underway for 4-8 hours at the temperature of 85-95 DEG C, and then the multipolymer is obtained. The preparation method has simple operation, and is environment friendly; and in addition, waste water is less in the production process, thus being capable of realizing industrial production.

Description

technical field [0001] The invention belongs to the field of preparation of grafted starch copolymers, in particular to a preparation method of hydroxyalkanoate grafted starch copolymers. Background technique [0002] Staple fiber textile warps need to be sized before weaving. The sizing materials used are mainly organic polymer compounds. They bind the warp short fibers so that the warp yarns can withstand warp wires, healds, reeds, adjacent yarns, etc. during weaving. repeated frictional action; repeated stretching, tortuous, and impact actions in interwoven opening motions. The warp yarns of unsized staple fibers are held together only by twisting friction between fibers, and the structure is relatively loose and uneven, and there are many defects such as weak points, protrusions, thick points, etc.; there are many hairiness protruding from the surface of the yarn, which entangles adjacent yarns , Affect yarn throwing and opening. Therefore, the sizing agent for warp ya...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00D06M15/11
Inventor 郭腊梅
Owner DONGHUA UNIV