CN112724624A - 一种全生物降解纸塑复合材料及其制备方法 - Google Patents
一种全生物降解纸塑复合材料及其制备方法 Download PDFInfo
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Abstract
本发明涉及一种全生物降解纸塑复合材料及其制备方法,属于包装材料领域。所述可降解纸塑复合材料的组成原料包括可降解聚合物80-90份、纳米碳酸钙20-40份、改性淀粉10-20份、四氢呋喃10-20份,山梨醇15-20份,稳定剂2-3份和增塑剂0.2-1份。本发明所述的复合材料具有优异的机械力学性能和耐水耐湿性,使用废弃后可完全降解无毒无害。本发明所述的制备方法过程简单,成本低廉,便于规模化生产。
Description
技术领域
本发明属于包装材料技术领域,涉及一种以可生物降解聚合物和天然高分子填料为原料制备全生物降解型纸塑料复合材料及其制备方法,具体涉及一种全生物降解纸塑复合材料及其制备方法。
背景技术
传统石油基聚合物应用废弃后导致的“白色污染”和“海洋微塑料”问题已经成为人类社会面临的主要环境问题,其中包装材料约占塑料消费量的30%。因此,开发具有全生物降解特性的包装材料是目前包装材料领域研究的重点。
纸作为包装材料具有价格低,安全卫生,便于加工和耐冲击耐摩擦的优点,废弃后可生物降解不会对环境造成危害,被认为是最合适的包装材料。但对水蒸气、气体和气味的阻隔性能差,易于吸水,受潮后强度会降低是限制纸基材料大规模应用的主要限制因素。专利CN107955259A以聚丙烯、聚乙烯和牛皮纸复合得到一种纸塑复合包装材料,但是该材料降解性能差不能解决塑料残留问题。专利CN109134947A以聚乙烯醇和改性玉米淀粉为原料通过涂覆工艺得到一种具有生物降解特性的纸塑复合材料,但是聚乙烯醇耐水性能差限制了材料的应用领域。鉴于此,一种全生物降解纸塑复合材料及其制备方法是业内急需。
发明内容
本发明的目的在于提供一种全生物降解纸塑复合材料及其制备方法,针对目前传统纸塑复合材料不可降解,废弃后会导致白色污染,提出了一种全生物降解复合材料的组成,本发明将可生物降解母料、改性淀粉、纳米碳酸钙、羟甲基纤维素钠,山梨醇,稳定剂和增塑剂混合均匀后直接模压成膜,避免了传统涂覆法有机溶剂的使用。将可降解塑料薄膜和通过涂布的方式与纸质层直接粘结即可获得纸质复合材料。本发明制备过程环保无三废产生,获得材料完全可生物降解,无毒无害,可以替代传统纸基和纸塑复合包装材料,用于食品包装等高品质包装材料上。
本发明解决其技术问题是采取以下技术方案实现的:
一种全生物降解纸塑复合材料及其制备方法,由以下重量分数的原料组成:可降解聚合物80-90份、纳米碳酸钙20-40份、改性淀粉10-20份、羟甲基纤维素钠10-20份,山梨醇15-20份,稳定剂2-3份和增塑剂0.2-1份。
所述的可降解材料包括聚乳酸、聚碳酸酯和聚己内酯中的一种或几种复合。
所述的改性淀粉为乙酰化淀粉、醚化淀粉、氧化酯化淀粉和氧化醚化淀粉的一种。
所述的稳定剂为硬脂酸镁、硬脂酸锌、硬脂酸钙、硬脂酸钡、甲基锡、二甲基锡、二辛基锡和四苯基锡中的一种或多种混合。
所述的增塑剂为2,5-呋喃二甲酸正丁酯、乙酰化(寡聚)乳酸2-乙基己酯和乙酰柠檬酸三(乙基己)酯中的一种。
所述复合材料的制备方法,其特征在于:包括以下步骤:(1)按照设定的配比准备物料,将可降解聚合物、纳米碳酸钙、改性淀粉、羟甲基纤维素钠,山梨醇,稳定剂和增塑剂加入到混合机中,在50℃条件下搅拌20min,得到混合料; (2)将混合料放入液压机,采用模压成型制的薄膜;(3)将步骤(2)得到的薄膜加热并通过涂布的方式与纸质层粘结到一起即可。
本发明的有益效果:工艺简单,无原料损失,易于实现规模化生产;所获得产品成本低廉,可完全降解,不会造成任何环境污染,易于实现工业化规模生产。
具体实施方式
下面通过具体实施例对本实用新型做进一步讲述:
1.本具体实施方式的一种全生物降解纸塑复合材料及其制备方法,由以下重量分数的原料组成:可降解聚合物80-90份、纳米碳酸钙20-40份、改性淀粉 10-20份、羟甲基纤维素钠10-20份,山梨醇15-20份,稳定剂2-3份和增塑剂 0.2-1份。
所述的可降解材料包括聚乳酸、聚碳酸酯和聚己内酯中的一种或几种复合。
所述的改性淀粉为乙酰化淀粉、醚化淀粉、氧化酯化淀粉和氧化醚化淀粉的一种。
所述的稳定剂为硬脂酸镁、硬脂酸锌、硬脂酸钙、硬脂酸钡、甲基锡、二甲基锡、二辛基锡和四苯基锡中的一种或多种混合。
所述的增塑剂为2,5-呋喃二甲酸正丁酯、乙酰化(寡聚)乳酸2-乙基己酯和乙酰柠檬酸三(乙基己)酯中的一种。
所述复合材料的制备方法,其特征在于:包括以下步骤:(1)按照设定的配比准备物料,将可降解聚合物、纳米碳酸钙、改性淀粉、羟甲基纤维素钠,山梨醇,稳定剂和增塑剂加入到混合机中,在50℃条件下搅拌20min,得到混合料; (2)将混合料放入液压机,采用模压成型制的薄膜;(3)将步骤(2)得到的薄膜加热并通过涂布的方式与纸质层粘结到一起即可。
实施例1:
将聚乳酸40份、聚碳酸酯40份、纳米碳酸钙20份、乙酰化淀粉10份、羟甲基纤维素钠10份,山梨醇15份,硬脂酸镁2份和2,5-呋喃二甲酸正丁酯1 份加入到混合机中,在50℃条件下搅拌20min,得到混合料;将混合料放入液压机,采用模压成型制的薄膜;最后将薄膜加热并通过涂布的方式与纸质层粘结到一起即得到纸塑复合材料。
实施例2:
将聚乳酸40份、聚己内酯50份、纳米碳酸钙30份、氧化酯化淀粉10份、羟甲基纤维素钠15份,山梨醇15份,硬脂酸钡2份和2,5-呋喃二甲酸正丁酯 1份加入到混合机中,在50℃条件下搅拌20min,得到混合料;将混合料放入液压机,采用模压成型制的薄膜;最后将薄膜加热并通过涂布的方式与纸质层粘结到一起即得到纸塑复合材料。
实施例3:
将碳酸酯50份、聚己内酯40份、纳米碳酸钙20份、氧化酯化淀粉15份、羟甲基纤维素钠15份,山梨醇15份,甲基锡1份、二甲基锡2份和2,5-呋喃二甲酸正丁酯1份加入到混合机中,在50℃条件下搅拌20min,得到混合料;将混合料放入液压机,采用模压成型制的薄膜;最后将薄膜加热并通过涂布的方式与纸质层粘结到一起即得到纸塑复合材料。
实施例4:
将聚乳酸50份、聚己内酯40份、纳米碳酸钙15份、氧化酯化淀粉15份、羟甲基纤维素钠15份,山梨醇20份,二辛基锡2份和2,5-呋喃二甲酸正丁酯 1份加入到混合机中,在50℃条件下搅拌20min,得到混合料;将混合料放入液压机,采用模压成型制的薄膜;最后将薄膜加热并通过涂布的方式与纸质层粘结到一起即得到纸塑复合材料。
实施例5:
将聚乳酸50份、聚己内酯40份、纳米碳酸钙15份、氧化醚化淀粉15份、羟甲基纤维素钠10份,山梨醇20份,二辛基锡2份和乙酰化(寡聚)乳酸2-乙基己酯2份加入到混合机中,在50℃条件下搅拌20min,得到混合料;将混合料放入液压机,采用模压成型制的薄膜;最后将薄膜加热并通过涂布的方式与纸质层粘结到一起即得到纸塑复合材料。
实施例6:
将聚乳酸50份、聚己内酯40份、纳米碳酸钙15份、氧化酯化淀粉15份、羟甲基纤维素钠15份,山梨醇20份,二辛基锡2份和2,5-呋喃二甲酸正丁酯 1份加入到混合机中,在60℃条件下搅拌30min,得到混合料;将混合料放入液压机,采用模压成型制的薄膜;最后将薄膜加热并通过涂布的方式与纸质层粘结到一起即得到纸塑复合材料。
实施例7
将聚乳酸30份、聚碳酸酯20份、聚己内酯40份、纳米碳酸钙15份、氧化酯化淀粉15份、羟甲基纤维素钠15份,山梨醇20份,二辛基锡2份和2,5-呋喃二甲酸正丁酯1份加入到混合机中,在80℃条件下搅拌30min,得到混合料;将混合料放入液压机,采用模压成型制的薄膜;最后将薄膜加热并通过涂布的方式与纸质层粘结到一起即得到纸塑复合材料。
实施例8:
将聚乳酸30份、聚碳酸酯60份、纳米碳酸钙15份、氧化酯化淀粉15份、羟甲基纤维素钠15份,山梨醇20份,二辛基锡2份和乙酰柠檬酸三(乙基己) 酯1份加入到混合机中,在80℃条件下搅拌30min,得到混合料;将混合料放入液压机,采用模压成型制的薄膜;最后将薄膜加热并通过涂布的方式与纸质层粘结到一起即得到纸塑复合材料。
实施例9:
将聚碳酸酯50份、聚己内酯40份、纳米碳酸钙15份、氧化酯化淀粉15 份、羟甲基纤维素钠15份,山梨醇15份,二辛基锡2份和2,5-呋喃二甲酸正丁酯1份加入到混合机中,在60℃条件下搅拌40min,得到混合料;将混合料放入液压机,采用模压成型制的薄膜;最后将薄膜加热并通过涂布的方式与纸质层粘结到一起即得到纸塑复合材料。
需要强调的是,本发明所述的实施例是说明性的,而不是限定性的,因此本发明包括并不限于具体实施方式中所述的实施例,凡是由本领域技术人员根据本发明的技术方案得出的其他实施方式,同样属于本发明保护的范围。
Claims (6)
1.一种全生物降解纸塑复合材料及其制备方法,其特征在于它由以下重量分数的原料组成:可降解聚合物80-90份、纳米碳酸钙20-40份、改性淀粉10-20份、羟甲基纤维素钠10-20份,山梨醇15-20份,稳定剂2-3份和增塑剂0.2-1份。
2.根据权利要求1所述的一种全生物降解纸塑复合材料及其制备方法,其特征在于可降解材料包括聚乳酸、聚碳酸酯和聚己内酯中的一种或几种复合。
3.根据权利要求1所述的一种全生物降解纸塑复合材料及其制备方法,其特征在于改性淀粉为乙酰化淀粉、醚化淀粉、氧化酯化淀粉和氧化醚化淀粉的一种。
4.根据权利要求1所述的一种全生物降解纸塑复合材料及其制备方法,其特征在于稳定剂为硬脂酸镁、硬脂酸锌、硬脂酸钙、硬脂酸钡、甲基锡、二甲基锡、二辛基锡和四苯基锡中的一种或多种混合。
5.权利要求1所述的一种全生物降解纸塑复合材料及其制备方法,其特征在于增塑剂为2,5-呋喃二甲酸正丁酯、乙酰化(寡聚)乳酸2-乙基己酯和乙酰柠檬酸三(乙基己)酯中的一种。
6.根据权利要求1-5所述的一种全生物降解纸塑复合材料及其制备方法,其特征在于包括以下步骤:(1)按照设定的配比准备物料,将可降解聚合物、纳米碳酸钙、改性淀粉、羟甲基纤维素钠,山梨醇,稳定剂和增塑剂加入到混合机中,在50-90℃条件下搅拌20-50min,得到混合料;(2)将混合料放入液压机,采用模压成型制的薄膜;(3)将步骤(2)得到的薄膜加热并通过涂布的方式与纸质层粘结到一起即可。
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