CN117063782A - 一种全生物降解食用菌栽培袋及其制备方法 - Google Patents
一种全生物降解食用菌栽培袋及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种全生物降解食用菌栽培袋及其制备方法,涉及食用菌种植栽培的技术领域。所述栽培袋包括如下质量份数的下列组分:聚乳酸40‑60份,聚丁二酸丁二醇酯10‑30份,柠檬酸三丁酯10‑15份,埃洛石纳米管3‑5份,偶联剂KH5701‑3份,改性芦苇纤维5‑15份,生物基聚氨酯3‑5份,相容剂ADR 0.4‑0.6份。完全可生物降解,而且具有良好的力学性能和耐热性,有效解决了栽培袋带来的“白色污染”问题,在菌糠综合利用过程中可直接将菌棒破碎作为肥料,避免了脱袋环节。
Description
技术领域
本发明涉及食用菌种植栽培的技术领域,具体是一种全生物降解食用菌栽培袋及其制备方法。
背景技术
食用菌是高蛋白、低脂肪、食药兼用的绿色食品。食用菌消费需求逐年快速增长,食用菌产业已经成为中国农业种植业中继粮食、蔬菜、果树、油料之后的第五大产业。
随着食用菌工厂化栽培的技术不断成熟,香菇、木耳、金针菇、杏鲍菇等诸多品种均采用袋栽的方式进行培养,栽培袋作为食用菌种植的载体,毫无疑问的起着至关重要的作用。当前食用菌种植产业中采用的菌袋一般有聚丙烯和聚乙烯两种材质,具有耐高温和韧性强等特点。但其均为化石资源来源的传统塑料,栽培后废弃的菌袋难以被降解,将造成严重的“白色污染”。为了有效解决废弃菌糠回收利用问题,需要把废弃菌棒的栽培袋剥离后,用于制作染料、肥料和饲料等,这为菌糠的资源化利用带来极大的不便。
发明内容
为解决上述问题,即解决上述背景技术提出的问题,本发明提出了一种全生物降解食用菌栽培袋及其制备方法,具体技术方案如下:
一种全生物降解食用菌栽培袋,所述栽培袋包括如下质量份数的下列组分:聚乳酸40-60份,聚丁二酸丁二醇酯10-30份,柠檬酸三丁酯10-15份,埃洛石纳米管3-5份,偶联剂KH5701-3份,改性芦苇纤维5-15份,生物基聚氨酯3-5份,相容剂ADR 0.4-0.6份。
进一步的,所述栽培袋包括如下质量份数的下列组分:聚乳酸50份,聚丁二酸丁二醇酯20份,柠檬酸三丁酯10份,埃洛石纳米管5份,偶联剂KH5702份,改性芦苇纤维10份,生物基聚氨酯4份,增溶剂ADR 0.5份。
一种全生物降解食用菌栽培袋的制备方法,所述方法如下:
①对芦苇纤维改性:将芦苇分割成5-10cm的段,清洗除尘、除杂后,进行挤压、浸渍、揉丝处理,处理后使用4%氢氧化钠溶液在90℃条件下处理1h,随后用水洗至中性,再用1%硫酸在90℃条件下处理1h,并用水洗至中性,烘干至恒重,使用球磨机将芦苇纤维磨至1000目以下;
②干燥:将聚乳酸、聚丁二酸丁二醇酯、改性芦苇纤维、埃洛石纳米管和生物基聚氨酯,在60℃条件下真空干燥12h;
③共混:将干燥后的原料和助剂按照配方比例在混料机中进行预混,混合均匀后加入双螺杆挤出机中,加热熔融温度为160-180℃,螺杆转速为100r/min的条件下共混造粒;
④退火:共混后的材料在100℃下退火0.5h,并以100℃/min的降温速度将材料温度降至室温;
⑤吹膜:将退火后的料粒在60℃条件下真空干燥12h,使用吹膜机进行吹膜,得到全生物降解食用菌栽培袋。
进一步的,步骤⑤中,吹膜机的温度设置为155-175℃,挤出机电机转速为150r/min,膜袋厚度为0.04mm。
本发明的有益技术效果为:由聚乳酸、聚丁二酸丁二醇酯、生物基聚氨酯等生物基材料经共混改性、纳米复合、纤维增强、退火处理等手段加工而成,不仅完全可生物降解,而且具有良好的力学性能和耐热性,有效解决了栽培袋带来的“白色污染”问题,在菌糠综合利用过程中可直接将菌棒破碎作为肥料,避免了脱袋环节。
具体实施方式
下面描述本发明的优选实施方式。本领域技术人员应当理解的是,这些实施方式仅仅用于解释本发明的技术原理,并非旨在限制本发明的保护范围。
按照下述方法制备全生物降解食用菌栽培袋:
将芦苇分割成5-10cm的段,清洗除尘、脱杂后,使用双螺杆挤压浸渍揉丝设备进行挤压浸渍揉丝处理,处理后使用4%氢氧化钠溶液在90℃条件下处理1h,随后水洗至中性,再用1%硫酸在90℃下处理1h,水洗至中性,烘干至恒重,使用球磨机将芦苇纤维磨至1000目以下,形成改性芦苇纤维;
将聚乳酸、聚丁二酸丁二醇酯、改性芦苇纤维、埃洛石纳米管和生物基聚氨酯在60℃下真空干燥12h,将干燥后的各种原料和助剂按照配方比例在混料机中进行预混,混合均匀后加入双螺杆挤出机中,加热熔融温度为160-180℃,螺杆转速为100r/min的条件下进行共混造粒;共混后的材料在100℃退火0.5h,并以100℃/min的降温速度将材料温度降至室温;将退火处理后的料粒在60℃条件下真空处理12h,使用吹膜机进行吹膜,吹膜机各段温度设定为155-175℃,挤出机电机转速为150r/min,膜袋厚度为0.04mm。
按照上述方法制备的栽培袋按照下列实施例所述配方进行制备:
实施例1
取聚乳酸40份,聚丁二酸丁二醇酯30份,柠檬酸三丁酯10份,埃洛石纳米管5份,偶联剂KH5702份,改性芦苇纤维10份,生物基聚氨酯4份,增溶剂ADR 0.5份,按照上述比例配料并混合均匀,按照上述方法造粒并退火处理,经吹膜机吹膜制袋。
实施例2
取聚乳酸50份,聚丁二酸丁二醇酯20份,柠檬酸三丁酯10份,埃洛石纳米管5份,偶联剂KH5702份,改性芦苇纤维10份,生物基聚氨酯4份,增溶剂ADR 0.5份,按照上述比例配料并混合均匀,按照上述方法造粒并退火处理,经吹膜机吹膜制袋。
实施例3
取聚乳酸50份,聚丁二酸丁二醇酯20份,柠檬酸三丁酯5份,埃洛石纳米管5份,偶联剂KH5702份,改性芦苇纤维10份,生物基聚氨酯4份,增溶剂ADR 0.5份,按照上述比例配料并混合均匀,按照上述方法造粒并退火处理,经吹膜机吹膜制袋。
实施例4
取聚乳酸50份,聚丁二酸丁二醇酯20份,柠檬酸三丁酯10份,埃洛石纳米管5份,偶联剂KH5702份,改性芦苇纤维10份,生物基聚氨酯4份,增溶剂ADR 0.5份,按照上述比例配料并混合均匀,按照上述方法造粒并退火处理,经吹膜机吹膜制袋。
实施例5
取聚乳酸50份,聚丁二酸丁二醇酯20份,柠檬酸三丁酯10份,埃洛石纳米管3份,偶联剂KH5702份,改性芦苇纤维10份,生物基聚氨酯4份,增溶剂ADR 0.5份,按照上述比例配料并混合均匀,按照上述方法造粒并退火处理,经吹膜机吹膜制袋。
实施例6
取聚乳酸50份,聚丁二酸丁二醇酯20份,柠檬酸三丁酯10份,埃洛石纳米管5份,偶联剂KH5702份,改性芦苇纤维10份,生物基聚氨酯4份,增溶剂ADR 0.5份,按照上述比例配料并混合均匀,按照上述方法造粒并退火处理,经吹膜机吹膜制袋。
为与上述实施例进行对比,另按照下列配方制备对比例:
对比例1
取聚乳酸50份,聚丁二酸丁二醇酯20份,按照上述比例配料并混合均匀,采用双螺杆挤出机造粒后经吹膜机进行吹膜制袋。
对比例2
取聚丙烯80份,埃洛石纳米管5份,偶联剂KH5702份,改性芦苇纤维10份,生物基聚氨酯4份,按照上述比例配料并混合均匀,采用双螺杆挤出机造粒后经吹膜机进行吹膜制袋。
将上述实施例1-6和对比例1-2制备的全生物降解食用菌栽培袋材料进行力学性能和耐热性能检测,结果见表1。
表1不同实施例和对比例栽培袋力学性能和耐热性能试验结果
根据表1结果表明,对比例1中未添加改性剂和助剂,无法起到增强增韧和提高维卡软化温度的作用,其力学性能和耐热性能等方面均差于实施例1-6,。实施例1-6加入不同比例的改性剂、成核剂、填料等助剂,其在力学性能和耐热性能方面有所差异,柠檬酸三丁酯、改性芦苇纤维和埃洛石纳米管可以提高材料的力学性能,退火工艺可以提升耐热性能,并且各助剂在力学性能和耐热性能方面具有协同增效的作用。并且与对比例2相比较,实施例2为最佳实施例。
根据标准检测实施例2与对比例2制备的食用菌栽培袋的生物降解性,经测定,实施例2所制栽培袋90天生物分解率为94.7%,对比例2所制备的栽培袋,90天生物分解率为8.4%,即实施例2所制的栽培袋具有更优良的生物降解性。
综合对比实施例1-6与对比例1-2,采用本发明方法以生物基材料为基体,采用共混改性、纳米复合、纤维增强、退火处理等手段制备的食用菌栽培袋具有良好的力学性能,可有效代替传统塑料菌袋,并在一定条件下可全生物降解,避免造成环境污染和解决现有不可降解栽培袋回收处理的难题。
虽然已经参考优选实施例对本发明进行了描述,但在不脱离本发明的范围的情况下,可以对其进行各种改进并且可以用等效物替换其中的部件,尤其是,只要不存在结构冲突,各个实施例中所提到的各项技术特征均可以任意方式组合起来。本发明并不局限于文中公开的特定实施例,而是包括落入权利要求的范围内的所有技术方案。
Claims (4)
1.一种全生物降解食用菌栽培袋,其特征在于:所述栽培袋包括如下质量份数的下列组分:聚乳酸40-60份,聚丁二酸丁二醇酯10-30份,柠檬酸三丁酯10-15份,埃洛石纳米管3-5份,偶联剂KH5701-3份,改性芦苇纤维5-15份,生物基聚氨酯3-5份,相容剂ADR 0.4-0.6份。
2.根据权利要求1所述的一种全生物降解食用菌栽培袋,其特征在于:所述栽培袋包括如下质量份数的组分:聚乳酸50份,聚丁二酸丁二醇酯20份,柠檬酸三丁酯10份,埃洛石纳米管5份,偶联剂KH5702份,改性芦苇纤维10份,生物基聚氨酯4份,增溶剂ADR 0.5份。
3.一种制备权利要求1或2所述的全生物降解食用菌栽培袋的方法,其特征在于:所述方法如下:
①对芦苇纤维改性:将芦苇分割成5-10cm的段,清洗除尘、除杂后,进行挤压、浸渍、揉丝处理,处理后使用4%氢氧化钠溶液在90℃条件下处理1h,随后用水洗至中性,再用1%硫酸在90℃条件下处理1h,并用水洗至中性,烘干至恒重,使用球磨机将芦苇纤维磨至1000目以下;
②干燥:将聚乳酸、聚丁二酸丁二醇酯、改性芦苇纤维、埃洛石纳米管和生物基聚氨酯,在60℃条件下真空干燥12h;
③共混:将干燥后的原料和助剂按照配方比例在混料机中进行预混,混合均匀后加入双螺杆挤出机中,加热熔融温度为160-180℃,螺杆转速为100r/min的条件下共混造粒;
④退火:共混后的材料在100℃下退火0.5h,并以100℃/min的降温速度将材料温度降至室温;
⑤吹膜:将退火后的料粒在60℃条件下真空干燥12h,使用吹膜机进行吹膜,得到全生物降解食用菌栽培袋。
4.根据权利要求3所述的一种全生物降解食用菌栽培袋的制备方法,其特征在于:步骤⑤中,吹膜机的温度设置为155-175℃,挤出机电机转速为150r/min,膜袋厚度为0.04mm。
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