探秘一次性玉米餐具的制备！

In recent years, plastic straws, plastic lunch boxes and other disposable tableware in the evaporation residue, metal, microorganism and other detection indicators, there are varying degrees of problems. These products will produce a large number of harmful substances in contact with food, especially when heated, and remain on food. If they are abandoned, they are difficult to degrade if they are not handled properly, thus causing great harm to people's body and environment. Therefore, the research on the production of degradable materials from agricultural wastes such as straw and husk is gradually rising. Disposable corn tableware came into being, which is not harmful to people's health, easy to degrade under natural conditions, can also increase soil fertility, and can be recycled as animal feed, which is quite in line with the requirements of sustainable development.

该玉米淀粉餐具的工艺流程如下：

The technological process of the corn starch tableware is as follows:

以玉米芯粉为主料，淀粉、壳聚糖以、黄原胶2聚乙烯醇为胶黏剂，在90℃熔融共混30min制备混合原料，再通过一系列后续处理制备餐具。

Corncob powder was used as the main material, starch, chitosan and xanthan gum 2 polyvinyl alcohol as the adhesive. The mixed raw materials were prepared by melt blending at 90 ℃ for 30 min, and then tableware was prepared by a series of subsequent treatment.

玉米芯餐具的制备工艺流程:

The preparation process of corncob tableware is as follows

玉米芯粉(过筛)、聚乙烯醇(溶解)、淀粉、壳聚糖、黄原胶→丶加适量水→混合、搅拌、恒温水浴熔融→挤压→塑形→于燥→表面处理→于燥→冷却→性能测定。

Corncob powder (sieving), polyvinyl alcohol (dissolving), starch, chitosan, xanthan gum → adding appropriate amount of water → mixing, stirring, constant temperature water bath melting → extrusion → shaping → drying → surface treatment → drying → cooling → performance test.
                                          

一、一次性玉米淀粉餐具混合原料制备：

1、 Preparation of mixed raw materials for disposable corn starch tableware:

1、将玉米芯粉过筛，称取备用。

1. Sift corncob powder, weigh and set aside.

2、称取淀粉、壳聚糖、黄原胶，并与玉米芯粉混合均匀，备用。

2. Weigh starch, chitosan and xanthan gum, mix them with corncob powder, and set aside.

3、称取一定量聚乙烯醇，加入适量蒸馏水，90℃水浴加热15min并不断搅拌，直全溶解。

3. Weigh a certain amount of polyvinyl alcohol, add appropriate amount of distilled water, heat it in 90 ℃ water bath for 15min, and continuously stir until it is completely dissolved.

4、将2中的混合粉末与溶解的聚乙烯醇混合均匀，再加入适量的蒸馏水保障每个原料全润湿，放入恒温水浴锅中90℃加热30min，不断搅拌以保证原料受热均匀，并使料浆质地细腻良好。

4. Mix the mixed powder in 2 with the dissolved polyvinyl alcohol evenly, then add appropriate amount of distilled water to ensure that each raw material is fully wetted, put it into a constant temperature water bath at 90 ℃ for 30min, and continuously stir to ensure that the raw material is heated evenly and the slurry texture is fine and good.

二、挤压成型：

2、 Extrusion molding:

1、将上述料浆稍冷却后进行挤压塑形，放入干燥箱中干燥1h，恒温100℃。

1. After the slurry is cooled slightly, it is extruded and molded, and then put into the drying oven to dry for 1 hour at a constant temperature of 100 ℃.

2、将一次性玉米淀粉餐具取出冷却室温，再放入于燥箱中于燥30min，恒温85℃，即制得成品。

2. The disposable corn starch tableware was taken out and cooled to room temperature. Then it was put into the drying oven and dried for 30 minutes at 85 ℃.