Fully-biodegradable material as well as preparation method and application thereof

A biodegradable material and whole biological technology, applied in the field of fully biodegradable materials and their preparation, can solve problems such as non-degradability, and achieve the effects of easy access, low environmental pollution, and good degradation performance.

CN105038163AInactive Publication Date: 2015-11-11ECOTA ENVIRONMENTAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-11-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a fully-biodegradable material as well as a preparation method and application thereof. The fully-biodegradable material is prepared from the following raw materials in percentage by weight: 15%-70% of polylactic acid, 20%-50% of starch, 3%-65% of a copolymer of butanediol adipate and butanediol terephthalate, 1%-10% of polylactide polyol, 0.1%-5% of a titanate coupling agent and 0-5% of an aid. The fully-biodegradable material has excellent mechanical property, can be biologically degraded and is relatively low in cost. The preparation method can be easily implemented by virtue of existing high-speed mixing equipment and double-screw extruders. The fully-biodegradable material has excellent and stable performance, can be biologically degraded, is relatively low in cost and is applicable to the fields of plastic packaging materials, agricultural plastic mulching films, disposable tableware and the like.
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Description

technical field

[0001] The invention relates to the technical field of fully biodegradable materials, in particular to a fully biodegradable material and its preparation method and application. Background technique

[0002] With the rapid development of the plastics industry, plastics have been widely used in various fields of the national economy and have a wide range of uses. However, it is followed by the generation of a large amount of waste plastics (for example, about 5 million tons of waste plastics are produced in China every year), most of which are polypropylene (PP), polyethylene (PE) and polystyrene ( PS) materials, these materials cannot be decomposed naturally, therefore, after the products such as disposable plastic packaging materials, agricultural films and disposable tableware made of PP materials, PE materials and PS materials are used, if their wastes are discarded at will , will accumulate on the land due to its non-degradability, causing serious white ...

Examples

Embodiment 1

[0042] At first, take the raw material of following weight part: polylactic acid (Natureworks4032D) 60 weight parts, cornstarch (national starch) 30.5 weight parts, the copolymer of butylene adipate and butylene terephthalate (Xin Fu Pharmaceutical) 6 parts by weight, polylactide polyol (Shenzhen Guanghua Weiye Industrial Co., Ltd., D-PLA220B) 3 parts by weight, titanate coupling agent (Nanjing Youpu Chemical Co., Ltd., UP-311W) 0.5 parts by weight share.

[0043] The preparation process is as follows: using high-speed mixing equipment, first dry the copolymer of polylactic acid, starch, butylene adipate and butylene terephthalate at 105°C for 30 minutes; then add polylactide polyol and titanic acid The ester coupling agent is mixed evenly to obtain a mixed material; the mixed material is added to a twin-screw extruder for melt blending; finally, it is air-cooled and granulated to obtain a fully biodegradable material. The screw length-to-diameter ratio of the twin-screw extrud...

Embodiment 2

[0045] First, take the following raw materials by weight: 40 parts by weight of polylactic acid (Natureworks4032D), 44.5 parts by weight of cornstarch (national starch), a copolymer of butylene adipate and butylene terephthalate (Xin Fu Pharmaceutical) 10 parts by weight, polylactide polyol (Shenzhen Guanghua Weiye Industrial Co., Ltd., D-PLA220B) 5 parts by weight, titanate coupling agent (Nanjing Youpu Chemical Co., Ltd., UP-311W) 0.5 parts by weight share.

[0046] The preparation process is as in Example 1.

Embodiment 3

[0048] First, take the following raw materials by weight: 17 parts by weight of polylactic acid (Natureworks4032D), 30 parts by weight of cornstarch (national starch), a copolymer of butylene adipate and butylene terephthalate (Xin Rich Pharmaceutical) 49.5 parts by weight, polylactide polyol (Shenzhen Guanghua Weiye Industrial Co., Ltd., D-PLA220B) 3 parts by weight, titanate coupling agent (Nanjing Youpu Chemical Co., Ltd., UP-311W) 0.5 parts by weight share.

[0049] The preparation process is as in Example 1.