CN104761792A - Biodegradable plastic taking egg shells as raw materials and preparation method of biodegradable plastic - Google Patents

Abstract

The invention discloses biodegradable plastic taking egg shells as raw materials. The biodegradable plastic is characterized by being prepared from the following raw materials in parts by weight: 20-30 parts of egg shells, 10-15 parts of polyethylene, 10-15 parts of glutinous rice flour, 5-10 parts of bean curd residue powder, 4-8 parts of pineapple leaves, 3-5 parts of xanthan gum, 2-4 parts of sodium caseinate, 0.1-0.2 part of calcium propionate, 1-2 parts of sodium polyacrylate, 4-6 parts of castor oil, 1-2 parts of a silane coupling agent KH-550 and 10-15 parts of a compound auxiliary agent. The biodegradable plastic disclosed by the invention is high in degradation rate and high in degradation speed, also has good flexibility and strength which meets the use requirements, is simple in production process, ensures that white pollution can be effectively reduced, and has relatively high environmental and economic benefits.

Description

A kind of eggshell is biodegradable plastic of raw material and preparation method thereof

Technical field

The present invention relates to plastics arts, being specifically related to a kind of eggshell is biodegradable plastic of raw material and preparation method thereof.

Background technology

Along with industrial expansion, plastics are widely used in life, but bring a large amount of solid waste, especially Phthalates household plastic goods as all kinds of in plastic packaging bag, shopping bag, plastics cutlery box and mulch film etc. are thrown aside after using becomes solid waste thereupon.Because waste or used plastics is difficult to the characteristic of natural degradation, and harmful treatment process, the plastic refuse of generation is stayed in water body, soil, is formed " white pollution ", makes environmental degradation, and then threatens the existence of the mankind, becomes the public hazards in the world.

For solving the pollution problem that plastic refuse brings, degradable plastics becomes the focus of research and development.Biodegradable plastic is by macromolecular material that the vital movement of microorganism can be degraded very soon under physical environment.Because biodegradable plastic has good degradation property, contribute to alleviating day by day serious plastic garbage problem, avoid the pollution produced environment, bring high Social benefit and economic benefit, market outlook are very wide.

Summary of the invention

The object of this invention is to provide the biodegradable plastic that a kind of eggshell is raw material, degradation rate is high, and degradation speed is fast, and has good snappiness and the intensity meeting service requirements, environmentally friendly.

The present invention is achieved by the following technical solutions:

Eggshell is a biodegradable plastic for raw material, it is characterized in that, it is obtained by the raw material of following weight parts:

Eggshell 20-30, polyethylene 10-15, sticky rice flour 10-15, bean curd ground-slag 5-10, pineapple leaves 4-8, xanthan gum 3-5, sodium-caseinate 2-4, calcium propionate 0.1-0.2, sodium polyacrylate 1-2, Viscotrol C 4-6, silane resin acceptor kh-550 1-2, composite assistant 10-15;

Wherein composite assistant is made up of the raw material of following weight part:

Epoxy soybean oil 30-40, lanolin 3-5, amine hydroxybenzene 2-4, whiteruss 2-4, beeswax 1-2, Wickenol 111 0.5-1, glyceryl monostearate 0.1-0.2, Tween-80 0.1-0.2;

Wherein the preparation method of composite assistant is:

First epoxy soybean oil is mixed with lanolin, whiteruss and Wickenol 111, high-speed mixing 20-30min under first normal temperature, add again glyceryl monostearate and Tween-80 in 80-90 DEG C, 1000-1200r/min stirs 5-10min, finally add amine hydroxybenzene and beeswax 400-600r/min at same temperature and stir 1-2h, after cooling and get final product.

Eggshell is a preparation method for the biodegradable plastic of raw material, and it comprises the following steps:

(1) mix with sticky rice flour, bean curd ground-slag, xanthan gum, sodium-caseinate and sodium polyacrylate after pineapple leaves being pulverized, water is added by solid-liquid weight ratio 2:1-1:1, dry after 60-80 DEG C of stirring 2-4h, mix with eggshell and calcium propionate again, 100-200 mesh sieve is crossed after grinding evenly, prior to 100-120 DEG C of process 0.5-1h, then under adding silane resin acceptor kh-550 and the same temperature of Viscotrol C, 1000-1500r/min stirs 20-30min;

(2) prior to 120-140 DEG C, stir 20-30min under 200-400r/min condition after polyethylene being mixed with composite assistant, then add the mixture that obtains in (1) in 140-160 DEG C, stir 0.5-1h under 600-800r/min condition;

(3) mixture that step (2) obtains is added twin screw extruder, extruding pelletization under 140-160 DEG C of condition, to obtain final product.

Advantage of the present invention is:

With agricultural waste eggshell for main raw material prepares biodegradable plastic, carry out selecting to each raw material and proportioning and improve, material compatibility is strong, and degradation property is good, synergetic property is high, make the product degradation rate that obtains high, degradation speed is fast, and has good snappiness and meet the intensity of service requirements, production technique is simple, energy-conserving profit waste, effectively can reduce white pollution, has higher environmental benefit and economic benefit.

Embodiment

Non-limiting examples of the present invention is as follows:

Eggshell is a biodegradable plastic for raw material, is prepared from by the component raw material of following weight (kg):

Eggshell 25, polyethylene 12, sticky rice flour 12, bean curd ground-slag 8, pineapple leaves 6, xanthan gum 4, sodium-caseinate 3, calcium propionate 0.15, sodium polyacrylate 1.5, Viscotrol C 5, silane resin acceptor kh-550 1.5, composite assistant 12;

Wherein, composite assistant is made up of the raw material of following weight (kg):

Epoxy soybean oil 35, lanolin 4, amine hydroxybenzene 3, whiteruss 3, beeswax 1.5, Wickenol 111 0.8, glyceryl monostearate 0.15, Tween-80 0.15;

The preparation method of composite assistant:

First epoxy soybean oil is mixed with lanolin, whiteruss and Wickenol 111, high-speed mixing 30min under first normal temperature, add again glyceryl monostearate and Tween-80 in 90 DEG C, 1000r/min stirs 5min, finally add amine hydroxybenzene and beeswax 600r/min at same temperature and stir 2h, after cooling and get final product.

Eggshell is that the preparation method of the biodegradable plastic of raw material comprises the following steps:

(1) mix with sticky rice flour, bean curd ground-slag, xanthan gum, sodium-caseinate and sodium polyacrylate after pineapple leaves being pulverized, water is added by solid-liquid weight ratio 1:1, dry after 80 DEG C of stirring 4h, mix with eggshell and calcium propionate again, 200 mesh sieves are crossed after grinding evenly, prior to 120 DEG C of process 0.5h, then under adding silane resin acceptor kh-550 and the same temperature of Viscotrol C, 1500r/min stirs 20min;

(2) prior to 140 DEG C, stir 20min under 400r/min condition after polyethylene being mixed with composite assistant, then add the mixture that obtains in (1) in 160 DEG C, stir 1h under 600r/min condition;

(3) mixture that step (2) obtains is added twin screw extruder, extruding pelletization under 140-160 DEG C of condition, to obtain final product.

With reference to GB/T1040-2006, tensile property test is carried out to plastics obtained above, record tensile strength 18.7MPa; Material 30d biological degradation rate >=20%.

Claims (2)

1. eggshell is a biodegradable plastic for raw material, it is characterized in that, it is obtained by the raw material of following weight parts:

Eggshell 20-30, polyethylene 10-15, sticky rice flour 10-15, bean curd ground-slag 5-10, pineapple leaves 4-8, xanthan gum 3-5, sodium-caseinate 2-4, calcium propionate 0.1-0.2, sodium polyacrylate 1-2, Viscotrol C 4-6, silane resin acceptor kh-550 1-2, composite assistant 10-15;

Described composite assistant is made up of the raw material of following weight part:

Epoxy soybean oil 30-40, lanolin 3-5, amine hydroxybenzene 2-4, whiteruss 2-4, beeswax 1-2, Wickenol 111 0.5-1, glyceryl monostearate 0.1-0.2, Tween-80 0.1-0.2;

The preparation method of described composite assistant is:

First epoxy soybean oil is mixed with lanolin, whiteruss and Wickenol 111, high-speed mixing 20-30min under first normal temperature, add again glyceryl monostearate and Tween-80 in 80-90 DEG C, 1000-1200r/min stirs 5-10min, finally add amine hydroxybenzene and beeswax 400-600r/min at same temperature and stir 1-2h, after cooling and get final product.

2. a kind of eggshell according to claim 1 is the preparation method of the biodegradable plastic of raw material, it is characterized in that, comprises the following steps:

(1) mix with sticky rice flour, bean curd ground-slag, xanthan gum, sodium-caseinate and sodium polyacrylate after pineapple leaves being pulverized, water is added by solid-liquid weight ratio 2:1-1:1, dry after 60-80 DEG C of stirring 2-4h, mix with eggshell and calcium propionate again, 100-200 mesh sieve is crossed after grinding evenly, prior to 100-120 DEG C of process 0.5-1h, then under adding silane resin acceptor kh-550 and the same temperature of Viscotrol C, 1000-1500r/min stirs 20-30min;

(2) prior to 120-140 DEG C, stir 20-30min under 200-400r/min condition after polyethylene being mixed with composite assistant, then add the mixture that obtains in (1) in 140-160 DEG C, stir 0.5-1h under 600-800r/min condition;

(3) mixture that step (2) obtains is added twin screw extruder, extruding pelletization under 140-160 DEG C of condition, to obtain final product.