CN102875853A - Degradable plastic and preparation method thereof - Google Patents

Degradable plastic and preparation method thereof Download PDF

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CN102875853A
CN102875853A CN2012104049234A CN201210404923A CN102875853A CN 102875853 A CN102875853 A CN 102875853A CN 2012104049234 A CN2012104049234 A CN 2012104049234A CN 201210404923 A CN201210404923 A CN 201210404923A CN 102875853 A CN102875853 A CN 102875853A
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degradation
ultrafine
starch
synthetic resin
agent
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CN2012104049234A
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郭俊才
范瑞光
李晋岩
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郭俊才
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Abstract

The invention discloses degradable plastic and a preparation method thereof. The degradable plastic is made from ultrafine starch, ultrafine plant powder, synthetic degradable resin, synthetic resin, plasticizer, pro-oxidant, compatibilizer, lubricant, photosensitizer, heat sensitizer, and degradation control agent. The preparation method of the degradable plastic includes the steps of heating up a container to 70-80 DEG C; adding the ultrafine starch and the ultrafine plant powder into the container, respectively adding the plasticizer, the pro-oxidant, the compatibilizer, the degradation control agent and the synthetic resin, and mixing well; adding the synthetic into another container, sequentially adding the photosensitizer, the heat sensitizer and the lubricant at room temperature, and mixing well; and mixing well the materials and holding the temperature at 100-140 DEG C for each zone to obtain degradable plastic particles. The degradable plastic made by the preparation method has the advantages of thoroughness in degradation, fast degradation, low production cost and the like.

Description

一种可降解塑料及其制备方法 A degradable plastics and preparation method

技术领域 FIELD

[0001] 本发明涉及一种可降解塑料及其制备方法。 [0001] The present invention relates to a biodegradable plastic and a preparation method.

背景技术 Background technique

[0002] 塑料在通常的自然环境条件下,其分子结构能保持二百年不变,随着塑料消耗量的逐年增加,特别是一次性塑料制品的大量使用,给环境造成了极大的危害。 [0002] plastics under normal conditions, the natural environment, its molecular structure can maintain two hundred years, the consumption of plastics increases every year, especially the large-scale use of disposable plastic products, to the environment caused great harm .

[0003]目前,解决塑料污染环境有回收再利用、焚烧、填埋和使用可降解塑料等方法。 [0003] Currently, to solve the pollution of the environment plastic recycling, incineration, landfill, and the like using the biodegradable plastic. 焚烧会产生大量烟尘和有毒气体,会对大气造成二次污染,填埋后的塑料废弃物不能降解、占用土地会给环境土壤和地下水带来危害。 Incineration will produce a lot of smoke and toxic gases, the atmosphere will cause secondary pollution, plastic waste after the landfill can not be degraded, occupation of land will harm the soil and groundwater environment. 回收需投入大量人力、物力,而且回收再利用率很低,也不能无限循环使用,最终仍然污染环境。 Recycling needs to invest a lot of manpower, material resources, and the recycling rate is low, it can not be infinitely recycled, ultimately still pollute the environment. 所以最有效的途径是研制和生产、推广应用可降解塑料制品。 So the most effective way is the development and production, promote the use of biodegradable plastic products.

[0004] 降解塑料可分为共聚物型和添加型两种,共聚物型是在合成时引入光敏剂,赋予材料具有光降解性能,添加型是在聚合物中外加光敏剂的方法制备光降解材料,有的还填充部分滑石粉、碳酸钙等材料。 [0004] The biodegradable plastic and additions can be divided into two kinds copolymer, copolymer-type photosensitizer is incorporated during synthesis, providing material having a photocatalytic activity, the preparation method is applied to the photosensitizer additive in the polymer photodegradation material also fills some portion of talc, calcium carbonate and other materials. 但这些材料只是进行光崩坏,埋土后不能降解,其降解结果只是将合成树脂由大块变成小块,很难取得令人满意的效果。 However, these materials only light collapse can not buried after degradation, the degradation will result only from the chunks into pieces of a synthetic resin, it is difficult to obtain satisfactory results. 依靠淀粉作为填充剂,并结合光降解技术制成光、生物降解塑料,但由于制品中淀粉含量低,属于淀粉填充型塑料,也不能完全降解,仍对环境有一定程度的污染。 Rely on starch as the filler, and the combined light made from photodegradation technique, biodegradable plastics, but a low starch content because the article, are starch-filled plastic, can not be completely degraded, there is still some degree of environmental pollution. 近几年来,人们采用合成的方法研制出多种可生物降解性材料,例如聚脂肪族聚酯、聚乳酸、微生物聚酯等等,但由于其合成难度大,成本高,很难在市场上大量推广应用。 In recent years, people developed a synthetic method more biodegradable materials, aliphatic polyesters such as polyethylene, polylactic acid, microbial polyesters, etc., but because their synthesis is difficult, costly, difficult to market widely promoted.

发明内容 SUMMARY

[0005] 本发明提供的一种可降解塑料及其制备方法,克服了塑料降解不充分问题。 A degradable plastics and its preparation method, is not sufficient to overcome the problem of degradation of the plastic [0005] The present invention provides.

[0006] 本发明的技术方案是:一种可降解塑料,由超细化淀粉、超细化植物粉、合成降解树脂、合成树脂、增塑剂、助氧化剂、增容剂、润滑剂、光敏剂、热敏剂、降解控制剂组成,各原料的重量百分比是超细化淀粉25%〜33%,超细化植物粉10%〜18%,合成降解树月旨15%〜45%,合成树脂10%〜22%,增塑剂2%〜12%,助氧化剂1%〜5%,增容剂 [0006] aspect of the present invention is: A degradable plastics, ultra-fine starch, plant superfine powders, synthetic biodegradable resin, synthetic resins, plasticizers, antioxidants, compatibilizers, lubricants, photosensitive agents, thermal agents, degrading control agent composition, the weight percentage of ultra-fine starch feedstock is 25% ~33%, ultrafine powder 10% ~ 18% of plants, trees biosynthesis and degradation of 15% ~ 45% months purpose, synthetic resin 10% ~ 22%, ~ 12% plasticizer, 2%, 1% ~ 5% pro-oxidant, a compatibilizer

2 %〜5 %,润滑剂O. 3〜4 %,光敏剂O. 01 %〜O. I %,热敏剂O. 01 %〜O. I %,降解控制剂O. 01% 〜O. 1%。 2% ~ 5%, the lubricant O. 3~4%, photosensitizer O. 01% ~O. I%, thermal agent O. 01% ~O. I%, the degradation controlling agent O. 01% ~O. 1%.

[0007] 超细化淀粉的粒度在1-10 μ m之间。 [0007] The ultrafine particle size of the starch in between 1-10 μ m.

[0008] 超细化植物粉,由植物纤维加工而成,粒度在1-10 μ m之间,可用棉花、玉米、高粱、谷物等秸杆经超细化处理制成。 [0008] Ultrafine powder plant, plant fibers formed by the process, a particle size between 1-10 μ m, the available cotton, maize, sorghum, cereal straw and the like made by ultra-fine processing.

[0009] 合成降解树脂为聚乳酸或乙烯一丙烯酸共聚物(EAA)其中的一种或多种混合组成。 [0009] Synthetic biodegradable resin is a polylactic acid or ethylene-acrylic acid copolymer (EAA) wherein one or more mixed composition.

[0010] 合成树脂为聚乙烯,由线型低密度聚乙烯、高密度聚乙烯或低密度聚乙烯其中的一种或多种混合组成。 [0010] The synthetic resin is polyethylene, a mixture of one or more linear low density polyethylene, high density polyethylene or low density polyethylene composition therein.

[0011] 增塑剂为多元醇,由甘油或山梨醇其中的一种或多种混合组成。 [0011] plasticizer is a polyhydric alcohol, a mixture of one or more compositions wherein glycerol or sorbitol. [0012] 助氧化剂为长链脂肪酸,由硬脂酸、油酸或亚油酸其中的一种或多种混合组成。 [0012] The co-oxidizing agent is a long chain fatty acid, a mixture of one or more of stearic acid, oleic acid or linoleic acid composition therein.

[0013] 增容剂为白油、植物油、矿物油、铝酸酯偶联剂其中的一种或多种混合组成。 [0013] The compatibilizer is one or more mixed white oils, vegetable oils, mineral oils, wherein the aluminum coupling agent composition.

[0014] 润滑剂为聚乙烯蜡、油酸酰硬脂酸镁或硬脂酸钙其中的一种或多种混合组成。 [0014] one or more mixed lubricant is a polyethylene wax, magnesium stearate or calcium stearate, oleic acid composition therein.

[0015] 光敏剂为芳香酮、芳香胺、二茂铁及其衍生物、脂肪酸铁或二乙基二硫代氨基甲酸铁的一种或多种混合组成。 [0015] photosensitizers are aromatic ketones, aromatic amines, ferrocene and derivatives thereof, a fatty acid, one or iron diethyl dithiocarbamate or more iron mixture composition.

[0016] 热敏剂为脂肪酸的锰、油酸的锰、乙酰基丙酮锰或乙酰基丙酮钴的一种或多种混合组成。 [0016] thermosensitive agent, manganese oleic A acetylacetone manganese or cobalt acetylacetone or more mixed composition of fatty acids.

[0017] 降解控制剂为酚类抗氧剂,酚类抗氧剂为2,6-二叔-4-甲基对甲酚或β- (3,5- 二叔丁基-4-羟基苯基)其中的一种或多种混合组成。 [0017] Degradation control agent is a phenolic antioxidant, the phenolic antioxidant is 2,6-di-p-cresol or 4-methyl-β- (3,5- di-tert-butyl-4-hydroxyphenyl yl) wherein the one or more mixed composition.

[0018] 一种制备降解塑料的方法,包括以下步骤: [0018] A method for preparing a degradable plastic, comprising the steps of:

[0019] (I)将容器升温到70-80°C ;将超细化淀粉和超细化植物粉放入容器中,搅拌3-7分钟;分二次加入增塑剂,然后加入助氧化剂、增容剂、降解控制剂、合成降解树脂,每次加料时间间隔3-5分钟,将原料搅拌均匀; [0019] (I) The vessel was heated to 70-80 ° C; super refined vegetable starch and ultrafine powders into the container, stirred for 3-7 min; at the second plasticizer is added, followed by addition of the pro-oxidant , compatibilizers, degradation controlling agent, degradation of synthetic resin, each feeding interval 3-5 minutes, stir the raw material;

[0020] (2)将合成树脂加入另一容器中,室温下依次加入光敏剂、热敏剂、润滑剂,每次加料时间间隔3-7分钟,将原料搅拌均匀; [0020] (2) The synthetic resin is added to another vessel, a photosensitizer were added at room temperature, thermal agents, lubricants, 3-7 minutes each time interval addition, stir the raw material;

[0021] (3)将步骤(I)中制备的混合物加入步骤(2)制备的混合物中,搅拌混合均匀,在平行同相双螺杆挤出机上挤出造粒,双螺杆挤出机各区温度控制在100-140°C之间,即可制成可降解塑料粒子。 [0021] (3) The mixture prepared in step (I) is added in step (2) was prepared, stirred and mixed uniformly, in parallel extrusion granulation with an extrusion with a twin screw extruder, a twin-screw extruder temperature control between 100-140 ° C, it can be made of biodegradable plastic particles.

[0022] 本发明制备的可降解塑料粒子,用来制作成可降解塑料袋或各种可降解塑料容器。 [0022] The biodegradable plastic particles prepared according to the present invention, as used to make a variety of biodegradable plastic or biodegradable plastic containers.

[0023] 超细化淀粉和超细化植物粉分子中含有大量羟基,其邻近分子间往往以氢键相互作用而形成微晶结构的完整大颗粒,使其玻璃化转变温度高于分解温度。 [0023] The ultrafine and ultra-fine starch plant powder containing a large amount of hydroxyl groups in the molecule, between adjacent molecules tend to form hydrogen bonds microcrystalline structure of the full-sized particles, so that the glass transition temperature higher than the decomposition temperature. 因此普通超细化淀粉和超细化植物粉不具有热塑加工性能,在应用前必须先对其进行改性处理。 Thus ordinary superfine and ultrafine vegetable starch powder does not have the thermoplastic processing properties, it must be applied before modification. 采用多元醇和长链脂肪酸对其表面处理,可以将超细化淀粉和超细化植物粉中的大量羟基进行烷基化和酯基化,削弱超细化淀粉和超细化植物粉分子间氢键的作用,使其易于无序化,明显提高其分散性。 Polyhydric alcohols and long chain fatty acids using a surface treatment thereof may be super refined vegetable starch and ultrafine powder in a large number of ester groups and hydroxyalkyl of weakening between the ultra-fine and ultra-fine starch plant powder molecular hydrogen the key action, making it easy disorder, increasing their dispersibility. 同时多元醇又是超细化淀粉和超细化植物粉的理想增塑剂,通过其与超细化淀粉和超细化植物粉主链上氢键的作用,插入超细化淀粉和超细化植物粉分子链的间隔中,使超细化淀粉和超细化植物粉分子链的微小热运动变得容易,在其分解温度前实现了微晶的熔融,从而使超细化淀粉和超细化植物粉具有了热加工性能。 While the polyol plasticizer is over the superfine and ultrafine plant starch powder, through which hydrogen bonds with the starch superfine and ultrafine powders plant backbone role insert superfine and ultrafine starch spacer molecule chain plant powder, ultrafine and ultra-fine starch plant powder minute thermal motion of molecular chains becomes easy to achieve a melting of the crystallites prior to its decomposition temperature, such ultrafine and ultra starch refining plant powder having the hot workability. 另外,长链脂肪酸能在自然环境中产生自由基,可以引发合成树脂高分子链断裂降解。 Further, long chain fatty acids can generate a radical in the natural environment, may initiate a polymer chain scission degradation of the synthetic resin.

[0024] 本发明制备的可降解塑料,以超细化淀粉和超细化植物粉作为主要生物降解成分,并将增塑剂、增容剂、助氧化剂、合成降解树脂、降解控制剂与超细化淀粉、超细化植物粉有机地结合起来,形成衍生物,作为生物降解剂,具有良好的生物降解性能,在自然条件下埋土30天后质量失重率> 20%,同时引入光降解技术和热氧化降解技术,使材料具有多种降解形式的协同作用,在一年内全部粉化,并最终能降解成二氧化碳和水及小分子化合物,而全部降解。 [0024] The biodegradable plastic prepared according to the present invention, superfine and ultrafine vegetable starch powder as a main component of biodegradable and plasticizers, compatibilizing agents, antioxidants, synthetic resin degradation, the degradation controlling agent and Super refined starch, vegetable flour ultrafine organically combine to form a derivative, as a biodegradable agent having a good biodegradability, buried mass weight loss after 30 days> 20% under natural conditions, while the introduction of photodegradation technique thermal and oxidative degradation synergy technology, more degradation of the material having the form of, all powdered in a year, and eventually degrade into carbon dioxide and water and a small molecule compound, and completely degraded.

[0025] 增塑剂主要是对淀粉和植物粉进行改性处理,使其具有热加工性能。 [0025] Plasticizer mainly starch and vegetable powder reforming process so as to have the hot workability.

[0026] 助氧化剂在自然环境下有助于引发合成树脂进行短链反应,同时也有助于淀粉和植物粉的表面改性,削若淀粉氢键的作用,使其易于无序化。 [0026] The co-oxidizing agent aids in the initiation of a synthetic resin short-chain reaction in the natural environment, but also contribute to surface modified starches and vegetable flour, if the cutting hydrogen bonds of the starch, making it easy disorder. [0027] 增容剂可增加淀粉与高聚物的相容性。 [0027] The compatibilizing agent can increase compatibility between starch and polymers.

[0028] 本发明制备的可降解塑料,以淀粉和植物粉为主要降解剂,在材料中生物可降解成分高达45%以上,大大地增强了材料的生物降解性能。 [0028] The biodegradable plastic prepared according to the present invention, starch and vegetable powder as main degradation agent in the material biodegradable components up to 45%, greatly enhance the biodegradability of the material. 同时将光降解和热氧化降解与生物降解有机地结合起来,使材料具有多重降解的协同效应,保证材料具有完全降解性能:材料中的淀粉和植物粉衍生物在土壤中可迅速被微生物分解,使合成树脂的母体变得疏松,增加了表面/体积比;同时,自然界中的光、热、氧可以激活光敏剂、热敏剂、助氧化剂等的各种降解功能,合成树脂进行的光氧化和自氧化的作用下产生高分子链断裂,分解成为低分量的化合物;由于淀粉和植物粉衍生物是土壤中微生物的理想繁衍源,使微生物很容易附着在其表面,这些低分子化合物可以进一步分解为小分子化合物,直到最终分解为二氧化碳和水等小分子化合物。 While the thermo-oxidative degradation and photodegradation and biodegradation of organically combined, a synergistic effect of the material having multiple degradable material has to ensure complete degradation properties: material plant powder and the starch derivatives can be quickly decomposed by microorganisms in the soil, the synthetic resin matrix becomes loose, the increased surface / volume ratio; the same time, light nature, heat, oxygen can activate a photosensitizer, thermal agents, oxidants, etc. degradation of the various functions, photo-oxidation of synthetic resin and generating from the polymer strand breaks under the effect of oxidation, decompose into compounds of lower components; as plant powder and starch derivatives in the soil over the multiply source of microorganisms, a microorganism is easily attached to the surface thereof, low-molecular compound which may be further broken down into small molecular compounds, until finally decomposed into water, carbon dioxide and small molecule compounds.

[0029] 由本发明制作的可降解塑料制品,具有降解彻底,降解速度快,制作成本低等特点。 [0029] The present invention is made of biodegradable plastic products, with complete degradation, rapid degradation rate, and low manufacturing cost.

具体实施方式 Detailed ways

[0030] 实施例: [0030] Example:

[0031] 按以下重量百分比称取相应原料: [0031] The following weight percentages corresponding starting weighed:

[0032] 超细化淀粉:30 ; [0032] Ultrafine starch: 30;

[0033] 超细化植物粉:15; [0033] MICRO vegetable flour: 15;

[0034] 山梨醇:5 (增塑剂); [0034] Sorbitol: 5 (plasticizer);

[0035] 甘油:3 (增塑剂); [0035] Glycerol: 3 (plasticizer);

[0036] EAA乙烯-丙烯酸共聚物:18 (合成降解树脂); [0036] EAA ethylene - acrylic acid copolymer: 18 (Synthesis of resin degradation);

[0037] 豆油:1(增容剂); [0037] Soybean oil: 1 (compatibilizer);

[0038] 白油:0.5(增容剂); [0038] White oil: 0.5 (compatibilizer);

[0039] 硬脂酸:0· 6 (助氧化剂); [0039] Stearic acid: 0.6 (co-oxidizing agent);

[0040] 硬脂酸钙:0· 7 (润滑剂); [0040] Calcium stearate: 0.7 (lubricant);

[0041] 铝酸酯偶联剂:1· 47 (增容剂); [0041] aluminum coupling agent: 1 · 47 (compatibilizer);

[0042] 油酸:1· O (助氧化剂); [0042] oleic acid: 1 · O (co-oxidizing agent);

[0043] 二乙基二硫代氨基甲酸铁:0· 06 (光敏剂); [0043] diethyl dithiocarbamate iron: 0 · 06 (photosensitizer);

[0044] 聚乙烯蜡:0· 8 (润滑剂); [0044] polyethylene wax: 0 · 8 (lubricant);

[0045] 乙酰基丙酮锰:0· 8 (热敏剂); [0045] acetylacetone manganese: 0 · 8 (heat-sensitive agents);

[0046] 2,6- 二叔-4-甲基对甲酚:0· 07 (降解控制剂); [0046] -4-methyl-2,6-di-p-cresol: 0 · 07 (degradation controlling agent);

[0047] 线性低密度聚乙烯:7 (合成树脂); [0047] Linear low-density polyethylene: 7 (synthetic resin);

[0048] 高密度聚乙烯:8 (合成树脂); [0048] High-density polyethylene: 8 (a synthetic resin);

[0049] 低密度聚乙烯:7 (合成树脂)。 [0049] low density polyethylene: 7 (synthetic resin).

[0050] 将高速混合机升温到75 ± 5°C,然后把超细化淀粉和超细化植物粉放入高混机中,高速搅拌3分钟,分二次分别加入山梨醇、甘油,然后再加入硬脂酸、油酸,铝酸酯偶联剂、白油、豆油、EAA、每次加料时间间隔5分钟,混合均匀制成淀粉和植物粉衍生物; [0050] The high speed mixer was heated to 75 ± 5 ° C, then the superfine and ultrafine vegetable starch powder into a high speed mixer, a high speed stirring for 3 minutes, were added at the second sorbitol, glycerol, and adding stearic acid, oleic acid, aluminum coupling agent, white oil, soybean oil, EAA, each addition 5 min intervals, mixed plant powder made of starch and derivatives thereof;

[0051] 将线性低密度聚乙烯,高密度聚乙烯、低密度聚乙烯加入高速混合机,室温下依次加入二乙基二硫代氨基甲酸铁、乙酰苯丙酮锰、硬脂酸钙、聚乙烯蜡、2,6-二叔-4-甲基对甲酚,每次加料间隔3分钟,混合均匀成合成树脂混合物; [0051] The linear low density polyethylene, high density polyethylene, low density polyethylene, high-speed mixer was added, at room temperature were successively added diethyl dithiocarbamate iron, manganese acetone, acetophenone, calcium stearate, polyethylene wax, 2,6-di-4-methyl-p-cresol, each feeding interval of 3 minutes, the mixture was mixed into a synthetic resin;

[0052] 将淀粉和植物粉衍生物加入合成树脂混合物中,在室温下混合均匀,然后在长径比为60:1的平行同相双螺杆挤出机上挤出造粒,螺杆转速200-400转/分,各区温度设定:IOO0C,1350C,1400C,140°C,142°C,135°C,机头118°C,溶体挤出后用热切风冷或热切水冷、烘干方法造成粒,即制成淀粉型可降解塑料粒子。 [0052] starch and derivatives plant powder mixture added to the resin synthesis, mixed at room temperature and then aspect ratio of 60: 1 in parallel with the extrusion granulation machine with a twin-screw extruder, screw speed 200-400 rpm / min, temperature of each set: IOO0C, 1350C, 1400C, 140 ° C, 142 ° C, 135 ° C, head 118 ° C, melt extrusion after earnest with air or water cooling earnest, resulting granulation drying method, i.e. made of biodegradable starch-type plastic particles.

[0053] 应用上述可降解塑料粒子在长径比30:1,螺杆直径为45mm的吹膜机上吹宽度400mm,厚度0,025mm的膜,再经印刷、热合、冲裁制成可降解购物袋或垃圾袋。 [0053] Application of the above-described biodegradable plastic particles in the aspect ratio 30: 1, a screw diameter of 45mm film blowing machine blowing width 400mm, a film thickness of 0,025mm, and then by printing, biodegradable bags made of heat, blanking or garbage bags. 各种性能测试结果见表I : The results of various performance tests shown in Table I:

[0054] 表I :合成降解塑料性能测试表 [0054] Table I: Synthesis of degradable plastics Performance Test table

[0055] [0055]

Figure CN102875853AD00061

[0056] 该降解塑料如弃之户外,90天内可降解为粉末状,一年内全部降解。 [0056] The biodegradable plastic such as discarded outdoors, 90 days, powdery biodegradable, degradation of the entire year.

Claims (2)

1. 一种可降解塑料,由超细化淀粉、超细化植物粉、合成降解树脂、合成树脂、增塑剂、助氧化剂、增容剂、润滑剂、光敏剂、热敏剂、降解控制剂组成,各原料的重量百分比是超细化淀粉25%〜33%,超细化植物粉10%〜18%,合成降解树脂15%〜45%,合成树脂10%〜22%,增塑剂2%〜12%,助氧化剂1%〜5%,增容剂2%〜5%,润滑剂O. 3〜4%,光敏剂O. 01%〜O. 1%,热敏剂O. 01%〜O. 1%,降解控制剂O. 01%〜O. 1% ; 所述超细化淀粉的粒度在1-10 μ m之间; 所述超细化植物粉,由植物纤维加工而成,粒度在1-10 μ m之间; 所述合成降解树脂为聚乳酸或乙烯一丙烯酸共聚物其中的一种或多种混合组成; 所述合成树脂为聚乙烯,由线型低密度聚乙烯、高密度聚乙烯、低密度聚乙烯其中的一种或多种混合组成; 所述增塑剂为多元醇,由甘油或山梨醇其中的一种或多种混合组成; 所述助氧化剂 A biodegradable plastics, ultra-fine starch, plant superfine powders, synthetic biodegradable resin, synthetic resins, plasticizers, antioxidants, compatibilizers, lubricants, photosensitizers, thermal agent, degradation control agent composition, the weight percentage of ultra-fine starch feedstock is 25% ~33%, ultrafine powder 10% ~ 18% vegetable, synthetic resin degradation 15% ~ 45%, 10% ~ 22% of a synthetic resin, a plasticizer, 2% ~ 12%, pro-oxidant 1% ~ 5%, 2% ~ 5% compatibilizer, a lubricant O. 3~4%, photosensitizer O. 01% ~O. 1%, the thermal agent O. 01 % ~O 1%, the degradation controlling agent O. 01% ~O 1%;.. the starch ultrafine particle size between 1-10 μ m; the plant ultrafine powders, the process of plant fibers to a particle size between 1-10 μ m; the degradation of the synthetic resin is a polylactic acid or ethylene-acrylic acid copolymer wherein the one or more mixed composition; the synthetic resin is polyethylene, a linear low density polyethylene ethylene, high density polyethylene, low density polyethylene wherein the mixture composition of one or more; the plasticizer is a polyhydric alcohol, a mixture of one or more compositions wherein glycerol or sorbitol; the pro-oxidant 长链脂肪酸,由硬脂酸、油酸或亚油酸其中的一种或多种混合组成; 所述增容剂为白油、植物油、矿物油、铝酸酯偶联剂其中的一种或多种混合组成; 所述润滑剂为聚乙烯蜡、油酸酰硬脂酸镁或硬脂酸钙其中的一种或多种混合组成;所述光敏剂为芳香酮、芳香胺、二茂铁及其衍生物、脂肪酸铁或二乙基二硫代氨基甲酸铁的一种或多种混合组成; 所述热敏剂为脂肪酸的锰、油酸的锰、乙酰基丙酮锰或乙酰基丙酮钴的一种或多种混合组成; 所述降解控制剂为酚类抗氧剂,酚类抗氧剂为2,6-二叔-4-甲基对甲酚或β- (3,5- 二叔丁基-4-羟基苯基)其中的一种或多种混合组成。 Long chain fatty acid, a mixture of one or more of stearic acid, oleic acid or linoleic acid wherein the composition; the compatibilizer is a white oil, vegetable oils, mineral oils, aluminate coupling agent or one wherein a variety of mixed composition; the lubricant is a polyethylene wax, oleic acid, magnesium stearate or calcium stearate, wherein the one or more mixed composition; the photosensitizer is an aromatic ketones, aromatic amines, ferrocene and derivatives thereof, a fatty acid or a mixture of one or more iron diethyl dithiocarbamate iron composition; the thermosensitive agent is a fatty acid manganese, the manganese oleate, acetylacetone manganese, or cobalt acetyl acetonate the one or more mixed composition; the degradation controlling agent is a phenolic antioxidant, the phenolic antioxidant is 2,6-di-p-cresol or 4-methyl-β- (3,5- two tert-butyl-4-hydroxyphenyl) wherein one or more mixed composition.
2. —种权利要求I所述可降解塑料的制备方法,包括以下步骤: (1)将容器升温到70-80°C;将超细化淀粉和超细化植物粉放入容器中,搅拌3-7分钟;分二次加入增塑剂,然后加入助氧化剂、增容剂、降解控制剂、合成降解树脂,每次加料时间间隔3-5分钟,将原料搅拌均匀; (2)将合成树脂加入另一容器中,室温下依次加入光敏剂、热敏剂、润滑剂,每次加料时间间隔3-7分钟,将原料搅拌均匀; (3)将步骤(I)中制备的混合物加入步骤(2)制备的混合物中,搅拌混合均匀,在平行同相双螺杆挤出机上挤出造粒,双螺杆挤出机各区温度控制在100-140°C之间,即可制成可降解塑料粒子。 2. - I kind of claim preparing the biodegradable plastic, comprising the steps of: (1) the vessel heated to 70-80 ° C; super refined vegetable starch and ultrafine powders into the container, stirring 3-7 min; at the second plasticizer is added, followed by addition of a pro-oxidant, a compatibilizer, a degradation controlling agent, degradation of synthetic resin, each feeding interval 3-5 minutes, stir the material; (2) synthesis of resin was added to another vessel, a photosensitizer were added at room temperature, thermal agents, lubricants, 3-7 minutes each time interval addition, stir the raw material; the mixture (3) prepared in the step (I) is added in step mixture prepared in (2), mixing evenly, extruding granulation extrusion-phase parallel twin screw extruder, a twin-screw extruder temperature was controlled between 100-140 ° C, it can be made of biodegradable plastic particles .
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