CN105017619A - 一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解地膜及其制备方法 - Google Patents

一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解地膜及其制备方法 Download PDF

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CN105017619A
CN105017619A CN201510442351.2A CN201510442351A CN105017619A CN 105017619 A CN105017619 A CN 105017619A CN 201510442351 A CN201510442351 A CN 201510442351A CN 105017619 A CN105017619 A CN 105017619A
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程彦明
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ANHUI DELIN ENVIRONMENTAL PROTECTION DEVELOPMENT Co Ltd
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    • C08L2207/066LDPE (radical process)

Abstract

本发明涉及降解膜材料技术领域,具体涉及一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解地膜及其制备方法,本发明的地膜母粒利用纳米蛭石、硅溶胶等复合溶液吸附固定交联淀粉,干燥后的混合粉体经硅烷偶联剂处理后与聚乙烯相容性优良,改善了传统淀粉-聚乙烯降解薄膜降解周期长、降解不充分的缺点,掺混硫酸铈能辅助加快聚乙烯的光降解;该发明制备得到的地膜成膜性能好,保水透气,保温隔热,改善土壤环境,提高土壤肥力,降解速度快,不含有毒有害物质,成分安全,经济环保。

Description

一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解地 膜及其制备方法
技术领域
[0001] 本发明涉及降解膜材料技术领域,具体涉及一种由纳米蛭石负载交联淀粉改性的 低密度聚乙烯降解地膜及其制备方法。
背景技术
[0002] 地膜,顾名思义,即为地膜覆盖薄膜,用以提高土壤温度,保持土壤水分,维持土壤 结构,防止害虫侵袭作物和某些微生物引起的病害,促进植物生长等,目前地膜覆盖技术在 农业中得到了广泛推广,增产效果明显。由于现在大量使用的地膜是不可降解的高分子化 合物,既不受微生物侵蚀,也不能自行分解,长此下去必然会给后人带来难以解决的污染 危害。因此,研究可降解地膜逐渐受到重视。
[0003] 淀粉是自然界丰富的可再生资源,它无毒无害,可完全生物降解,然而较差的力 学性能与防水性能却限制了其应用。目前一些研究将淀粉进行改性处理,将其与合成树脂 或者可降解的高分子材料共混制成可降解材料,然而这些材料受其力学性能、降解周期以 及使用环境及加工技术的限制,产品的使用性能差强人意。
发明内容
[0004] 本发明的目的在于,制备一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解 地膜,以获得一种成膜性能好、生物降解充分、原料利用率高的经济环保降解地膜,为了实 现上述目的,本发明采用的技术方案如下: 一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解地膜,其特征在于,该地膜 由以下重量份的原料制成:低密度聚乙烯40-50、交联淀粉6-8、纳米蛭石粉8-10、葡萄糖 0. 1-0. 2、硬脂酸锌0. 01-0. 02、硫酸铈0. 01-0. 02、固含量为20-25%的硅溶胶10-12、乙 烯-丙烯酸共聚物4-5、羟甲基壳聚糖1-1. 5、烷基糖苷0. 1-0. 2、硅烷偶联剂0. 1-0. 2、水 25-35〇
[0005] 所述的一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解地膜的制备方法, 其特征在于,所述的制备方法为: (1)先将葡萄糖、硫酸铈、烷基糖苷、羧甲基壳聚糖投入加热至50-60°C的水中,搅拌至 其完全溶解,随后投入交联淀粉、硅溶胶,并将溶液加热至60-80°C,搅拌糊化30-40min后 将纳米蛭石粉投入混合液中,初步混合后将所得浆料研磨分散40-50min,最后将所得物料 热风干燥,完全除去水分,得纳米蛭石粉负载交联淀粉复合物备用; (2 )将步骤(1)所得纳米蛭石粉负载交联淀粉复合物与硅烷偶联剂搅拌混合均匀,再加 入其它剩余物料,充分混合均匀后投入单螺杆造粒机中造粒,所得颗粒再投入吹膜机中吹 制成膜,即得。
[0006] 本发明制备的降解地膜以低密度聚乙烯材料为主料,加入交联淀粉以改善其生物 降解性,为了提高交联淀粉与聚乙烯的相容性,利用具有良好吸附性的纳米蛭石、硅溶胶等 复合溶液吸附固定交联淀粉,干燥后的混合粉体经硅烷偶联剂处理后与聚乙烯相容性优 良,改善了传统淀粉-聚乙烯降解薄膜降解周期长、降解不充分的缺点,掺混硫酸铈能辅助 加快聚乙烯的光降解;该发明制备得到的地膜成膜性能好,保水透气,保温隔热,改善土壤 环境,提高土壤肥力,降解速度快,不含有毒有害物质,成分安全,经济环保。
具体实施方式 实施例
[0007] 本实施例的地膜由以下重量份的原料制成:低密度聚乙烯48、交联淀粉8、纳米蛭 石粉10、葡萄糖0. 1、硬脂酸锌0. 01、硫酸铈0. 02、固含量为20%的硅溶胶12、乙烯-丙烯酸 共聚物5、羟甲基壳聚糖1. 5、烷基糖苷0. 1、硅烷偶联剂0. 1、水32。
[0008] 该降解地膜的制备方法为: (1)先将葡萄糖、硫酸铈、烷基糖苷、羧甲基壳聚糖投入加热至50-60°C的水中,搅拌至 其完全溶解,随后投入交联淀粉、硅溶胶,并将溶液加热至60-80°C,搅拌糊化35min后将纳 米蛭石粉投入混合液中,初步混合后将所得浆料研磨分散45min,最后将所得物料热风干 燥,完全除去水分,得纳米蛭石粉负载交联淀粉复合物备用; (2 )将步骤(1)所得纳米蛭石粉负载交联淀粉复合物与硅烷偶联剂搅拌混合均匀,再加 入其它剩余物料,充分混合均匀后投入单螺杆造粒机中造粒,所得颗粒再投入吹膜机中吹 制成膜,即得。
[0009] 本实施例所制得的地膜制成厚度为0.0 lmm的试样,遵循相关标准进行性能测试 的结果为:
Figure CN105017619AD00041

Claims (2)

1. 一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解地膜,其特征在于,该地 膜由以下重量份的原料制成:低密度聚乙烯40-50、交联淀粉6-8、纳米蛭石粉8-10、葡萄 糖0. 1-0. 2、硬脂酸锌0. 01-0. 02、硫酸铈0. 01-0. 02、固含量为20-25%的硅溶胶10-12、乙 烯-丙烯酸共聚物4-5、羟甲基壳聚糖1-1. 5、烷基糖苷0. 1-0. 2、硅烷偶联剂0. 1-0. 2、水 25-35〇
2. 如权利要求1所述的一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解地膜 的制备方法,其特征在于,所述的制备方法为: (1)先将葡萄糖、硫酸铈、烷基糖苷、羧甲基壳聚糖投入加热至50-60°C的水中,搅拌至 其完全溶解,随后投入交联淀粉、硅溶胶,并将溶液加热至60-80°C,搅拌糊化30-40min后 将纳米蛭石粉投入混合液中,初步混合后将所得浆料研磨分散40-50min,最后将所得物料 热风干燥,完全除去水分,得纳米蛭石粉负载交联淀粉复合物备用; (2 )将步骤(1)所得纳米蛭石粉负载交联淀粉复合物与硅烷偶联剂搅拌混合均匀,再加 入其它剩余物料,充分混合均匀后投入单螺杆造粒机中造粒,所得颗粒再投入吹膜机中吹 制成膜,即得。
CN201510442351.2A 2015-07-23 2015-07-23 一种由纳米蛭石负载交联淀粉改性的低密度聚乙烯降解地膜及其制备方法 Pending CN105017619A (zh)

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