CN114174393B - 用于将聚乙烯转化为可分解材料的组合物及其制备方法 - Google Patents
用于将聚乙烯转化为可分解材料的组合物及其制备方法 Download PDFInfo
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- CN114174393B CN114174393B CN202080054230.XA CN202080054230A CN114174393B CN 114174393 B CN114174393 B CN 114174393B CN 202080054230 A CN202080054230 A CN 202080054230A CN 114174393 B CN114174393 B CN 114174393B
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Abstract
本发明公开了用于将不可生物降解材料转化为可分解材料的新型组合物。在一实施例中,不可生物降解材料可以是塑料。该组合物包括碳酸盐或碳酸氢盐化合物、植物提取物、水合剂和着色剂。将碳酸盐或碳酸氢盐化合物、植物提取物和水合剂以预定重量比混合,并混合着色剂,保持在水介质中。在一实施例中,将新型组合物施用于不可生物降解材料上以将其降解为可分解形式。在另一实施例中,该新型组合物与不可生物降解材料混合以将其降解为可分解形式。
Description
相关申请的交叉引用
本申请要求于2019年5月28日提交的美国临时申请号62/853,293的优先权,其公开内容全部并入本文。
技术领域
本发明总体上涉及废物管理组合物及其方法,更具体地,涉及可以用于将不可生物降解的废物例如聚乙烯、聚苯乙烯、聚氯乙烯和类似的复合化合物(人造)转化为可分解材料的新型组合物。
背景技术
最近的研究表明,塑料是环境恶化的主要原因,并且塑料占人类产生的废物总量的约10%。产生的塑料废物进入海洋,污染水体而且对食物链和人类健康产生有害影响。塑料材料的降解需要500-1,000年的时间。因此,多数曾经制造的塑料仍然以某种形状或形式存在。
聚氯乙烯、聚乙烯、聚丙烯和类似单体聚合形成某种合成化合物,主要是塑料。由于生产成本低、易于制造、灵活性、无腐蚀性和不透水性,这些塑料以不同的规模用于多种用途。尽管塑料便宜且耐用,但与之相关的主要缺点是其不可生物降解的特性,这给居住在地球上的生物带来了重大的问题。
处理这些合成化合物的常规方法是回收、填埋和焚烧。但是,这些方法具有缺点。回收过程具有高昂的前期成本,且对人类造成了许多威胁。此外,在回收过程中,此类化合物产生挥发性有机化合物和烟雾,这可能会危害植物和动物的生命。在回收期间熔化它们所需的热量也会产生碳排放,这最终导致全球变暖。
此外,将这些合成化合物倒入垃圾填埋场也不是可行的解决方案,因为没有足够可用的空间来安全地处置每年数十亿吨重度污染的材料。最后,用于处置的焚烧过程需要极高的温度,并且会导致例如有毒金属、二噁英等副产物。而且,这些焚烧系统是非常昂贵的。
美国专利号8,153,094公开了将聚乙烯转化为含碳颗粒的等容工艺(isochoricprocess)。它需要在适合于在过程中抑制任何压力增加的环境中加热模板;将模板保持在足以导致模板中基本所有的C-H键和C-C键断裂的温度和时间下;以及冷却环境。然而,在所述现有技术中实施的过程中使用了范围为650℃至700℃的高温,此温度是难以实现和维持的,并且其功能状态需要广泛的基础设施。
因此,鉴于现有技术中的上述问题,需要一种将不可生物降解塑料转化为可分解材料的系统,而且该系统是便宜的、对环境的损害最小化并且可以容易地实施。
发明内容
通过本发明克服了现有技术的一个或多个缺点,并且提供了附加的优点。通过本发明的技术实现了附加特征。在此本文详细描述了本发明的其他实施例和方面,并且将其视为本发明的一部分。
本发明的一方面公开了用于将不可生物降解材料转化为可分解材料的新型组合物,其中所述组合物包括但不限于碳酸盐或碳酸氢盐化合物、植物提取物、水合剂和着色剂。
本发明的另一方面公开了用于将不可生物降解材料转化为可分解材料的组合物的制备方法,其中将碳酸盐或碳酸氢盐化合物、植物提取物和水合剂以预定重量比混合,并混合着色剂,以形成均匀的混合物。
在本发明一实施例中,不可生物降解材料可以衍生于聚氯乙烯、聚乙烯、聚苯乙烯,更具体地,衍生于塑料化合物。
本发明还公开了使用所制备的组合物将不可生物降解材料转化为可分解材料的一种或多种方法。
在本发明一实施例中,以预定比例制备新型组合物,然后施用于不可生物降解材料的表面。使用时,将不可生物降解材料留下干燥,然后将其进行热分解,直到不可生物降解材料转化为灰烬,而灰烬又是可分解的。
在本发明另一实施例中,以另一预定比例制备组合物,然后与不可生物降解材料本身混合。混合后,将混合物进行热分解,直到不可生物降解材料转化为可分解的灰烬。
前文的概述仅仅是说明性的,并不旨在以任何方式进行限制。除了上文描述的说明性方面、实施例和特征之外,通过参考附图和以下详细描述,其他方面、实施例和特征将变得显而易见。
附图说明
图1示出了根据本发明一实施例制备组合物的比例。
图2示出了根据本发明一实施例将不可生物降解材料转化为可分解材料的方法。
图3示出了碳酸钙的热重分析,以重量百分比对温度作图。
图4示出了散沫花(Lawsonia Inermis)(Heena)的植物提取物的热重分析,以重量百分比对温度作图。
图5示出了未涂覆黑色聚乙烯板的差示扫描量热法(DSC)分析,以热流(W/g)对温度(℃)作图。
图6示出了未涂覆黑色聚乙烯板的热重分析,以重量百分比对温度作图。
图7示出了涂覆有所制备组合物的黑色聚乙烯板的热重分析,以重量百分比对温度作图。
图8示出了涂覆有所制备组合物的白色聚乙烯板的热重分析,以重量百分比对温度作图。
图9示出了在聚乙烯板热分解后获得的可分解样品(灰烬)的热重分析。
图10示出了根据本发明另一实施例将不可生物降解材料转化为可分解材料的方法。
图11示出了聚丙烯的热重分析,以重量百分比对温度作图。
图12示出了以65:35(w/w)的比例与所制备组合物混合的聚丙烯的热重分析,其中所制备的组合物包含CaCO3和散沫花(Lawsonia Inermis),比例为1:3(w/w)。
图13示出了以65:35(w/w)的比例与所制备组合物混合的聚丙烯的热重分析,其中所制备的组合物包含CaCO3和散沫花,比例为1:1(w/w)。
图14示出了以65:35(w/w)的比例与所制备组合物混合的聚丙烯的热重分析,其中所制备的组合物包含CaCO3和散沫花,比例为3:1(w/w)。
图15示出了三种比例的CaCO3和散沫花的叠加热重分析图,以及CaCO3、散沫花和聚丙烯的热重分析图。
具体实施方式
在本发明实施例的以下详细描述中,阐述了许多具体的细节,以便提供对本发明实施例的透彻理解。然而,对本领域的技术人员将是显而易见的是可以在没有这些具体细节的情况下实践本发明的实施例。
本发明中对“一个实施例”或“一实施例”的引用是指结合该实施例描述的组合物或方法包括在本发明的至少一个实施例中。
在本发明中,“示例”一词在本文中是指“用作示例、实例或说明”。本文描述为“示例”的本主题的任何实施例或实施方式不是必须解释为比其他实施例更优选或更有利。
尽管本发明容易受各种修改和替代形式的影响,但是其具体实施例已经通过示例在附图中示出并且将在下面进行详细描述。但是,应理解并不旨在将本发明限制为所公开的形式,而是相反,本发明旨在覆盖落入本发明范围内的所有修改、等同物和替代形式。
例如“包含”、“包括”或其任何其他变化之类的术语旨在涵盖非排他性包含,使得包含一系列化合物或步骤的组合物或方法不仅仅包括那些化合物或步骤,而是可以包含未明确列出的或者此类组合物或方法所固有的其他组合物或步骤。换句话说,在没有更多限制下,由“包括……”描述的组合物或方法的一个或多个元素不排除组合物或方法中存在其他元素或附加元素。
在下面对本发明实施例的详细描述中,参照构成本发明一部分的附图,并且在附图中以举例说明的方式示出了可以实践本发明的具体实施例。这些实施例足够详细地描述以使得本领域的技术人员能够实践本发明,并且应当理解可以使用其他实施例,且在不脱离本发明范围的情况下可以做出改变。因此,以下描述不应被视为限制性的。
本发明公开了新型组合物,其能够使衍生于聚氯乙烯、聚乙烯、聚苯乙烯,更具体地衍生于塑料化合物的不可生物降解材料,转化为可分解材料。
该组合物的形式可以是但不限于半固体溶液、完全水溶液、固体混合物或物理上的任何其他形式。所述组合物制备成具有均匀的稠度。
所述组合物包括但不限于:
i.碳酸盐或碳酸氢盐化合物,
ii.植物提取物,
iii.水合剂,和
iv.着色剂。
碳酸盐或碳酸氢盐化合物具有但不限于XCO3或XHCO3的化学式,其中X可以是铍(Beryllium)、镁(Magnesium)、钙(Calcium)、锶(Strontium)、钡(Barium)或属于碱土金属的周期金属类的任何金属。碳酸盐或碳酸氢盐化合物可以是CaCO3(以下是指碳酸钙)。在实施例中,碳酸钙可以从多种来源获得,包括但不限于白垩粉、蛋壳、贝壳等。
在实施例中,可用于制备植物提取物的植物可以是千屈菜科(Lythraceae)家族的成员。此外,植物提取物可以从散沫花(Lawsonia Inermis)物种中获得,其也称为Hina或Heena、海娜树(Henna tree)、指甲花(Mignonette tree)和埃及女贞(Egyptian Privet)。它是一种灌木或小树(高2m-6m),它可以是具有棘尖小枝的多刺、多分枝。相对年轻的树枝为四边形且颜色为绿色,但随着年龄增加会变成红色。该植物物种存在于世界的热带和亚热带地区,尤其是在西亚和南亚,例如印度和巴基斯坦,半干旱地区,北非和北澳大利亚等。
在实施例中,可以在组合物中使用的水合剂可以是饮用水或蒸馏水或茶水。此外,水合剂可以用于在水介质中制备组合物。
在实施例中,着色剂可以用于粘合在所述组合物中存在的一种或多种组分。着色剂可以是无毒的或天然的着色剂。此外,所使用的着色剂可以包括但不限于诱惑红(AlluraRed)、对亮黑(Black PN)、偶氮染料(azo-dye)和酸性红(Carmoisine)或任何其他无毒或天然的可以用作粘合剂将组合物粘合于不可生物降解材料的着色剂。
在实施例中,组合物可以通过以下来制备:将碳酸盐或碳酸氢盐化合物、植物提取物和水合剂以预定重量比混合,并混合着色剂,以在中性水介质中制成均匀的混合物,pH的范围为7至9,其中碳酸盐或碳酸氢盐化合物占组合物的大于30%且小于70%的重量百分比,植物提取物占组合物的大于3%且小于70%的重量百分比。
本发明还公开了使用所制备的组合物将不可生物降解材料转化为可分解材料的一些方法及其相关的实施例。
在本发明一实施例中,组合物可以按图1中提到的三种预定比例混合碳酸氢盐或碳酸盐化合物、植物提取物和水合剂,然后将其与着色剂混合,以制备均匀的混合物来制备。列举如下所述的可以用于制备组合物的比例:
a)(XHCO3或XCO3):(散沫花):(水合剂)=1500:150:3000(w/w)
b)(XHCO3或XCO3):(散沫花):(水合剂)=2000:200:4000(w/w)
c)(XHCO3或XCO3):(散沫花):(水合剂)=2500:250:5000(w/w)
在制备所述组合物后,对该能够将不可生物降解材料转化为可分解材料的组合物的使用是必要的。为此,图2示出了将不可生物降解材料转化为可分解材料的方法。如图2所示,在步骤201,将制备的组合物施用于不可生物降解材料的平坦表面上。在步骤202,不可生物降解材料可以通过太阳干燥或可以自然干燥,使得组合物可以找到保留在不可生物降解材料上的最佳阈值。此外,在组合物干燥后,再使不可生物降解材料经受但不限于热分解、燃烧或可以提供将不可生物降解材料转化为可分解材料的高温范围的任何其他机制,如步骤203所示。最后在步骤204,获得的最终残留物为可分解的材料,例如灰烬。
图3以重量百分比对温度作图描述了碳酸钙的热重分析。在一实施例中,碳酸钙的热重分析可以列举出相对于温度升高和/或降低的化合物重量的变化。分析是在氮气吹扫气氛中在50℃-900℃的温度范围内以10℃/min的扫描速率执行。从图3可以推断出碳酸钙重量的变化率始于661.97℃的基础温度。从图中还可以推断出,在分析过程中发生的最大重量损失为碳酸钙样品总重量的42.06%。
图4以重量百分比对温度作图描述了散沫花(Lawsonia Inermis)的植物提取物的热重分析。在一实施例中,散沫花的热重分析可以列举出相对于温度升高和/或降低的化合物重量的变化。分析是在氮气吹扫气氛中在50℃-900℃的温度范围内以10℃/min的扫描速率执行。从图中可以推断出散沫花的重量的最大变化始于240.77℃。从图中还可以推断出,在分析过程中发生的最大重量损失为散沫花样品的总重量的46.28%。
实施例1——聚乙烯板样品
在一实施例中,可以采用聚乙烯样品来阐明在各种温度水平下不可生物降解材料的降解。在实施例中,聚乙烯样品可以是板、圆柱体、固体等。在本发明一实施例中,聚乙烯板的颜色可以为黑色,其(R,G,B)值为(0,0,0)。
图5以热流(W/g)对温度(℃)作图示出了未涂覆黑色聚乙烯板的差示扫描量热法(DSC)分析。差示扫描量热法(DSC)分析可以列举出相对于温度升高和/或降低,化合物中热流的变化。差示扫描量热法(DSC)分析表明未涂覆黑色聚乙烯板的熔点为126.5℃。
图6以重量百分比对温度作图示出了未涂覆黑色聚乙烯板的热重分析。在实施例中,此处提到的未涂覆黑色聚乙烯板是指在黑色聚乙烯板上没有施加涂层或组合物。使用的聚乙烯是填充有大约一种填充材料的低密度聚乙烯(LDPE)。填充材料可以是有机物,包括但不限于聚酯纤维、热填料等。填充材料主要是添加在低密度聚乙烯(LDPE)中,以改善其物理和机械性能,添加比例在20-25%(w/w)的百分比范围内。在氮气吹扫气氛中,以10℃/min的扫描速率,在40℃-900℃的温度范围内对4.4510mg大小的样品进行分析。从图中可以推断出,在900℃下残留的剩余物占总重量的21.24%。未涂覆黑色聚乙烯板的热重分析表明总重量损失约为77%,剩余物为21.24%。
图7以重量百分比对温度作图示出了经涂覆黑色聚乙烯板的热重分析。在实施例中,此处提到的经涂覆黑色聚乙烯板是指在黑色聚乙烯板上施加有根据本发明一实施例制备的组合物。在氮气吹扫气氛中,以10℃/min的扫描速率,在40℃-900℃的温度范围内对8.5360mg大小的样品进行分析。从图中可以推断出,在900℃下残留的剩余物占总重量的44.58%。
采用另一聚乙烯板样品来说明在不同水平下材料的降解。在本发明一实施例中,聚乙烯板的颜色可以为白色,其(R,G,B)值为(255,255,255)。图8以重量百分比对温度作图显示了经涂覆白色聚乙烯板的热重分析。此处提到的经涂覆白色聚乙烯板是指在白色聚乙烯板上施加有根据本发明一实施例制备的组合物。在氮气吹扫气氛中,以10℃/min的扫描速率,在40℃-900℃的温度范围内对8.3820mg大小的样品进行分析。从图中可以推断出,在900℃下残留的剩余物占总重量的19.25%。
在本发明一实施例中,已经被用于分析的聚乙烯板样品可以有多种颜色。在本发明另一实施例中,已经被用于分析的聚乙烯板样品可以有不同程度的透明度或不透明度。
在此,对于聚乙烯板,残留的剩余物是可分解的材料(灰烬)。图9示出了获得的可分解材料(灰烬样品)的热重分析。在氮气吹扫气氛中,以10℃/min的扫描速率,在高达1000℃的温度范围内对8.0190mg大小的样品进行分析。分析的结果发现,在灰烬样品中没有塑性材料。
在本发明另一实施例中,组合物可以通过以下来制备:使用三种预定比例来混合碳酸盐或碳酸氢盐化合物(XHCO3或XCO3)与植物提取物(散沫花),然后将其与着色剂和水合剂(蒸馏水/饮用水/茶水)混合。碳酸盐或碳酸氢盐化合物与散沫花的比例如下所示:
a)(XHCO3或XCO3):(散沫花)=1:3(w/w)
b)(XHCO3或XCO3):(散沫花)=1:1(w/w)
c)(XHCO3或XCO3):(散沫花)=3:1(w/w)
制备得到组合物后,然后是可以用于使不可生物降解材料变成可分解材料的方法。图10示出了根据本发明实施例将不可生物降解材料转化为可分解材料的方法。在步骤901,将制备的组合物与不可生物降解材料混合。在步骤902,使混合物经受热分解、燃烧或提供高温以将不可生物降解材料转化为可分解材料的任何其他机制。最后在步骤903,获得的产物是可分解的材料,即灰烬。
实施例2——聚丙烯样品
采用聚丙烯样品来说明在不同水平下材料的降解。图11以重量百分比对温度作图示出了聚丙烯的热重分析。在氮气吹扫气氛中,以10℃/min的扫描速率,在50℃-900℃的温度范围内进行分析。从图中可以推断出,最大的重量变化始于363.19℃。
图12示出了以65:35(w/w)的比例与所制备组合物混合的聚丙烯的热重分析,其中所制备的组合物包含CaCO3和散沫花(Heena),比例为1:3(w/w)。热重分析是以重量百分比对温度进行作图。在氮气吹扫气氛中,以10℃/min的扫描速率,在50℃-900℃的温度范围内进行分析。
图13示出了以65:35(w/w)的比例与所制备组合物混合的聚丙烯的热重分析,其中所制备的组合物包含CaCO3和散沫花(Heena),比例为1:1(w/w)。热重分析是以重量百分比对温度进行作图。在氮气吹扫气氛中,以10℃/min的扫描速率,在50℃-900℃的温度范围内进行分析。
图14示出了以65:35(w/w)的比例与所制备组合物混合的聚丙烯的热重分析,其中所制备的组合物包含CaCO3和散沫花(Heena),比例为3:1(w/w)。热重分析是以重量百分比对温度进行作图。在氮气吹扫气氛中,以10℃/min的扫描速率,在50℃-900℃的温度范围内进行分析。
图15示出了三种比例的散沫花(Heena)和聚丙烯的叠加热重分析图,以及CaCO3、散沫花(Heena)和聚丙烯的热重分析图。已经观察到当组合物含有的散沫花与CaCO3的比例为1:3(w/w)时,残留剩余物的量较多。同样还观察到当组合物含有的散沫花和CaCO3的比例为1:3(w/w)时,获得了最少的塑性含量。
Claims (18)
1.用于将不可生物降解材料转化为可分解材料的组合物,所述组合物包括:
a) 碳酸盐或碳酸氢盐化合物,其中碳酸盐或碳酸氢盐化合物占组合物的大于30%且小于70%的重量百分比,其中所述碳酸盐或碳酸氢盐化合物具有化学式XCO3或X(HCO3)2,其中X是碱土金属,
b) 千屈菜科家族植物的植物提取物,其中植物提取物占组合物的大于3%且小于70%的重量百分比,和
c) 水合剂,其用于均匀溶解碳酸盐化合物和千屈菜科家族植物的植物提取物,或用于均匀溶解碳酸氢盐化合物和千屈菜科家族植物的植物提取物。
2.根据权利要求1所述的组合物,其中所述水合剂溶解碳酸盐化合物和千屈菜科家族植物的植物提取物,或溶解碳酸氢盐化合物和千屈菜科家族植物的植物提取物以形成半固体溶液或完全水溶液或固体混合物。
3.根据权利要求1所述的组合物,其中所述组合物进一步包括着色剂,其中所述着色剂使所述组合物的碳酸盐化合物和千屈菜科家族植物的植物提取物粘合,或使所述组合物的碳酸氢盐化合物和千屈菜科家族植物的植物提取物粘合。
4.根据权利要求1所述的组合物,其中所述水合剂是pH范围为7-9的饮用水或蒸馏水。
5.根据权利要求1所述的组合物,其中所述水合剂是pH范围为7-9的茶水。
6.根据权利要求3所述的组合物,其中所述着色剂是无毒着色剂。
7.根据权利要求3所述的组合物,其中所述着色剂是天然着色剂。
8.根据权利要求1所述的组合物,其中所述组合物保持为pH范围在7-9之间的半固体溶液、完全水溶液或固体混合物。
9.根据权利要求1所述的组合物,其中所述不可生物降解材料选自以下中的至少一种:聚乙烯化合物、聚苯乙烯化合物、聚氯乙烯化合物。
10.用于将不可生物降解材料转化为可分解材料的组合物的制备方法,所述组合物包括:
a) 碳酸盐或碳酸氢盐化合物,其中碳酸盐或碳酸氢盐化合物占组合物的大于30%且小于70%的重量百分比,其中所述碳酸盐或碳酸氢盐化合物具有化学式XCO3或X(HCO3)2,其中X是碱土金属,
b) 千屈菜科家族植物的植物提取物,其中植物提取物占组合物的大于3%且小于70%的重量百分比,和
c) 水合剂,其用于均匀溶解碳酸盐化合物和千屈菜科家族植物的植物提取物,或用于均匀溶解碳酸氢盐化合物和千屈菜科家族植物的植物提取物,
其中,将所述碳酸盐化合物、千屈菜科家族植物的植物提取物和水合剂混合,或将所述碳酸氢盐化合物、千屈菜科家族植物的植物提取物和水合剂混合以形成均匀的混合物。
11.根据权利要求10所述的组合物的制备方法,其中所述水合剂溶解碳酸盐化合物和千屈菜科家族植物的植物提取物,或溶解碳酸氢盐化合物和千屈菜科家族植物的植物提取物以形成半固体溶液或完全水溶液或固体混合物。
12.根据权利要求10所述的组合物的制备方法,其中所述组合物进一步包括着色剂,其中所述着色剂使组合物的碳酸盐化合物和千屈菜科家族植物的植物提取物粘合,或使组合物的碳酸氢盐化合物和千屈菜科家族植物的植物提取物粘合。
13.根据权利要求10所述的组合物的制备方法,其中所述水合剂是pH范围为7-9的饮用水或蒸馏水。
14.根据权利要求10所述的组合物的制备方法,其中所述水合剂是pH范围为7-9的茶水。
15.根据权利要求12所述的组合物的制备方法,其中所述着色剂是无毒着色剂。
16.根据权利要求12所述的组合物的制备方法,其中所述着色剂是天然着色剂。
17.根据权利要求10所述的组合物的制备方法,其中所述组合物保持为pH范围在7-9之间的半固体溶液、完全水溶液或固体混合物。
18.根据权利要求10所述的组合物的制备方法,其中所述不可生物降解材料选自以下中的至少一种:聚乙烯化合物、聚苯乙烯化合物、聚氯乙烯化合物。
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