阅读说明：本技术 一种耐高温pbat/pla全生物降解材料 (High-temperature-resistant PBAT/PLA full-biodegradable material ) 是由 陈翔蔚 于 2019-08-23 设计创作，主要内容包括：本发明公开了一种耐高温PBAT/PLA全生物降解材料,由下列重量配比的原料制备制成：淀粉40％-50％、PBAT(聚己二酸/对苯二甲酸丁二脂)10％-15％、PLA(聚乳酸)10％-15％、增塑剂5％-18％、偶联剂1％-5％、抗氧化剂3％-5％、扩链剂5％-10％、交联剂3％-5％。其制备简单,能达到降低成本、保持挺度、韧性、又同时提高了维卡变形温度到100度。(The invention discloses a high-temperature-resistant PBAT/PLA full-biodegradable material which is prepared from the following raw materials in parts by weight: 40-50% of starch, 10-15% of PBAT (poly (adipic acid)/butylene terephthalate), 10-15% of PLA (polylactic acid), 5-18% of plasticizer, 1-5% of coupling agent, 3-5% of antioxidant, 5-10% of chain extender and 3-5% of cross-linking agent. The preparation method is simple, and can reduce the cost, maintain the stiffness and the toughness and simultaneously improve the Vicat deformation temperature to 100 ℃.)

1. A high-temperature-resistant PBAT/PLA full-biodegradable material is characterized by being prepared from the following raw materials in parts by weight: 40-50% of starch, 10-15% of PBAT (poly (adipic acid)/butylene terephthalate), 10-15% of PLA (polylactic acid), 5-18% of plasticizer, 1-5% of coupling agent, 3-5% of antioxidant, 5-10% of chain extender and 3-5% of cross-linking agent.

2. The high-temperature-resistant PBAT/PLA fully biodegradable material as claimed in claim 1, which is prepared by the following steps: the starch and the coupling agent are firstly put in a high-speed mixer to be stirred at low speed for 15-30 minutes at normal temperature and 60 revolutions per minute to activate the surface of the starch, then other materials are added to be stirred at high speed for 15-30 minutes at the temperature of 90-100 ℃, and then the mixture is put in a double-screw plastic extruder to be extruded and granulated at the temperature of 190-200 ℃.

Technical Field

The invention relates to the field of degradation materials, in particular to a high-temperature-resistant PBAT/PLA full-biodegradable material.

Background

Most of the prior degradable products use starch and PVA (polyvinyl alcohol), and the material is hydrophilic, can be dissolved immediately when meeting water, is excessively soft, has insufficient stiffness, and is not suitable for manufacturing tableware or water containers. The prior waterproof disposable articles such as tableware and the like are basically made of common plastics such as PP, HDPE, PET and the like. These are waterproof materials, but are not degradable, not environmentally friendly, and form a "white pollution" to the environment.

If pure PBAT (poly adipic acid/butylene terephthalate) \ pure PLA (polylactic acid) is used for producing products, the waterproof, high-stiffness and toughness properties can be obtained, but the prominent characteristics are that: 1. high cost (about 2.8 ten thousand yuan per ton); 2. the Vicat deformation temperature is low (50-60 degrees).

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a high-temperature-resistant PBAT/PLA fully biodegradable material which is simple to prepare, can reduce the cost, maintain the stiffness and the toughness and simultaneously improve the vicat deformation temperature to 100 ℃.

In order to achieve the aim of the invention, the invention adopts the specific scheme that:

a high-temperature-resistant PBAT/PLA full-biodegradable material is prepared from the following raw materials in parts by weight: 40-50% of starch, 10-15% of PBAT (poly (adipic acid)/butylene terephthalate), 10-15% of PLA (polylactic acid), 5-18% of plasticizer, 1-5% of coupling agent, 3-5% of antioxidant, 5-10% of chain extender and 3-5% of cross-linking agent.

Further, the preparation method of the material comprises the following steps: the starch and the coupling agent are firstly put in a high-speed mixer to be stirred at low speed for 15-30 minutes at normal temperature and 60 revolutions per minute to activate the surface of the starch, then other materials are added to be stirred at high speed for 15-30 minutes at the temperature of 90-100 ℃, and then the mixture is put in a double-screw plastic extruder to be extruded and granulated at the temperature of 190-200 ℃.

The invention has the beneficial effects that:

waterproof, high, the toughness of stiffness, the cost is less than pure PBAT (poly adipic acid/butylene terephthalate)/pure PLA (polylactic acid), this product owing to used molecular crosslinking technique and molecular crystallization technique, and the vicat deformation temperature can reach 100 degrees, is applicable to injection moulding, and the shaping temperature: 190-200 ℃, the degradation time can be controlled within 3-18 months, PBAT (poly adipic acid/butylene terephthalate) is a fully degradable material/PLA (polylactic acid) is a corn starch extract, and the main materials are carbon dioxide and water, so that environmental pollution can not be caused; all other auxiliary agents can be changed into natural inorganic matters in nature.

Detailed Description

The present invention is further described below by way of specific examples, but the present invention is not limited to only the following examples. Variations, combinations, or substitutions of the invention, which are within the scope of the invention or the spirit, scope of the invention, will be apparent to those of skill in the art and are within the scope of the invention.

A high-temperature-resistant PBAT/PLA full-biodegradable material is prepared from the following raw materials in parts by weight: 40-50% of starch, 10-15% of PBAT (poly (adipic acid)/butylene terephthalate), 10-15% of PLA (polylactic acid), 5-18% of plasticizer, 1-5% of coupling agent, 3-5% of antioxidant, 5-10% of chain extender and 3-5% of cross-linking agent.

The preparation method of the material comprises the following steps: the starch and the coupling agent are firstly put in a high-speed mixer to be stirred at low speed for 15-30 minutes at normal temperature and 60 revolutions per minute to activate the surface of the starch, then other materials are added to be stirred at high speed for 15-30 minutes at the temperature of 90-100 ℃, and then the mixture is put in a double-screw plastic extruder to be extruded and granulated at the temperature of 190-200 ℃.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.