生物降解与玉米淀粉基降解一次性餐盒的原理比较！

Principle of biodegradable disposable lunch box: many synthetic pure polymers have anti microbial erosion ability. However, additives (such as plasticizers, lubricants, pigments and antioxidants) reduce this ability. Plasticizer residual fatty acids such as stearate can be degraded by microorganisms, resulting in the destruction of polymer surface, properties and even infrastructure. It is known that microbial degradation of natural polymers is accomplished by biosynthesis of enzymes and proteins. These enzyme proteins can be located on the cell wall or in the protoplast structure. Some enzymes can sneak into the surrounding environment, while others are in the cell and are released only when the cell is dissolved or broken mechanically. The enzyme only has high catalytic ability to chemical reaction, and can proceed at a high speed under suitable physiological conditions.

淀粉基降解一次性餐盒的原理：

Principle of starch based degradable disposable lunch box:

物理改性：理改性是指通过淀粉细微化、挤压机破坏淀粉结构或添加偶联剂和增塑剂等添加剂以增加淀粉与通用餐盒的相容性。

Physical modification: physical modification refers to increasing the compatibility of starch with general food box by starch refinement, destroying starch structure by extruder or adding additives such as coupling agent and plasticizer.

化学改性：化学改性通常是向淀粉分子引入疏水基团，使它在淀粉与合成树脂间起到了加强相容性的功能，改性的方法有羟烷基化、酯化或接枝共聚、醚化和交联改性等。

Chemical modification: chemical modification is usually to introduce hydrophobic groups into starch molecules to enhance the compatibility between starch and synthetic resin. The modification methods include hydroxyl alkylation, esterification or graft copolymerization, etherification and cross-linking modification.

玉米淀粉共混餐盒：共聚型光解一次餐盒主要利用共聚反应于高分子主链引入了羧基型感光基而赋予了其光降解的特性，并通过调节羧基型感光基团含量可控制光降解活性。

Corn starch blending lunch box: the copolymerization type photodegradation lunch box mainly uses the copolymerization reaction to introduce carboxyl photosensitive group into the main chain of polymer, which gives it the characteristics of photodegradation, and the photodegradation activity can be controlled by adjusting the content of carboxyl photosensitive group.

全玉米淀粉一次性餐盒全淀粉型淀粉指以淀粉为主料(占90%左右)，未添加任了石油化工原料一类产品，这里淀粉包括天然淀粉与改性淀粉，天然淀粉由于分子之间存有氢键，溶解性很差，融水但并不易溶于水，且直接加热时没有熔融过程，300℃以上分解。

All corn starch disposable lunch box all starch starch refers to a kind of products with starch as the main material (accounting for about 90%) and without any petrochemical raw materials. Here, starch includes natural starch and modified starch. Due to hydrogen bonds between molecules, natural starch has poor solubility, but it is not easy to dissolve in water, and there is no melting process when heated directly, and it decomposes above 300 ℃.

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