CN110628088A - 一种高淀粉含量全生物降解母粒及其制备方法 - Google Patents
一种高淀粉含量全生物降解母粒及其制备方法 Download PDFInfo
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Abstract
一种高淀粉含量全生物降解母粒,包括以下制备步骤:按重量份配比将植物淀粉100份、增塑剂5‑15份、水5‑10份、淀粉剪支酶0.1‑1份加入到高速混合机中,搅拌10min后,出料至捏合机中,在60~70℃下捏合反应10h,反应完全后出料,在90~100℃下烘料5~10小时,完全冷却后加入到高速搅拌机中,加入生物降解树脂5‑40份、相容剂5‑10份、润滑剂6‑8份继续搅拌30min后,出料至双螺杆挤出机,进行挤出造粒,挤出机温度设定为120℃~155℃,拉条后自然冷却、切粒。本发明制备的母粒性能更好,提升母粒的透明性,使得再制备薄膜时,不影响薄膜的透明度,薄膜的性能得到进一步加强,成本大大降低。
Description
技术领域
本发明涉及一种高淀粉含量全生物降解母粒及其制备方法。
背景技术
现有技术中,一般将淀粉或高直链淀粉与PBAT等生物降解聚酯、增塑剂、相容剂、润滑剂、抗氧剂等助剂混合后,挤出造粒,得到淀粉全生物降解母粒。
现有技术中淀粉使用的均为市售玉米淀粉、红薯淀粉、马铃薯淀粉等,由于含有支链淀粉比例较大,加工性能较差,需要加入大量增塑剂以便适应于加工;由于淀粉支链比例较大,所以加入小分子增塑剂比例较高,造成淀粉回生现象,大大影响最终产品的性能,因此淀粉的添加比例不能太高,使用淀粉支链淀粉比例高,拥有较强的分子间氢键力,不易分散,造成最终产品透明度和性能下降;若直接采用高直链淀粉,则会大大增加淀粉母粒的成本,不利于产品的推广。
发明内容
针对背景技术提出的问题,本发明研究设计了一种高淀粉含量全生物降解母粒及其制备方法,其目的在于:提供一种成本大大降低、提升母粒透明性的高淀粉含量全生物降解母粒及其制备方法。
本发明的技术解决方案:
一种高淀粉含量全生物降解母粒,其特征在于:包括如下重量份原料:
植物淀粉 100份
生物降解树脂 5-40份
淀粉剪支酶 0.1-1份
增塑剂 5-15份
去离子水 5-10份
相容剂 5-10份
润滑剂 6-8份。
优选的,所述重量份原料为:
植物淀粉 100份
生物降解树脂 10-20份
淀粉剪支酶 0.1-0.5份
增塑剂 5-8份
去离子水 6-8份
相容剂 6-8份
润滑剂 6-8份。
所述植物淀粉为玉米淀粉、红薯淀粉、马铃薯淀粉中的一种或两种以上组成。
所述生物降解树脂为PBAT、PLA、PBS、PCL、PHA中的一种或两种以上组成。
所述淀粉剪支酶为普鲁兰酶或α-异淀粉酶。
所述增塑剂为甘油、乙二醇、山梨醇中的一种或两种以上组成。
所述相容剂为乙烯丙烯酸共聚酯、乙烯丙烯酸甲酯共聚物、聚乙烯醇中的一种或两种以上组成。
所述的润滑剂为:硬脂酸、硬脂酸甘油酯、月桂酸甘油酯、硬脂酸酰胺、油酸酰胺中的一种或两种以上组成。
一种高淀粉含量全生物降解母粒的制备方法,其特征在于:包括以下步骤:
按上述重量份配比将植物淀粉、增塑剂、水、淀粉剪支酶加入到高速混合机中,搅拌10min后,出料至捏合机中,在60~70℃下捏合反应10h,让酶与淀粉充分反应,反应完全后出料,在90~100℃下烘料5~10小时,完全冷却后加入到高速搅拌机中,加入生物降解树脂、相容剂、润滑剂继续搅拌30min后,出料至双螺杆挤出机,进行挤出造粒,挤出机温度设定为120℃~155℃,拉条后自然冷却、切粒,得到高淀粉含量全生物降解母粒。
优选的,所述捏合反应的温度为70℃,烘料温度为95℃,挤出机温度设定为130-140℃。
本发明的有益效果:(1)将植物淀粉用淀粉剪支酶处理后,直链淀粉的比例大大提升,淀粉的热塑性能大大增加,因此加入的增塑剂量大大降低。由于小分子增塑剂用量的降低,使得淀粉的“回生”现象得到改善,制备的母粒性能更好;(2)通过淀粉剪支酶处理后,支链淀粉比例大大降低,增加了淀粉的分散能力,从而提升母粒的透明性,使得再制备薄膜时,不影响薄膜的透明度,且薄膜的性能得到进一步加强;(3)本发明直接采用市售淀粉为原料,通过添加淀粉剪支酶处理后,增加直链淀粉的比例,与直接采用高直链淀粉为原料相比,成本大大降低。
具体实施方式
下面结合具体实施例对本发明进一步说明,但本发明不仅仅限定于这些实施例。
实施例1
将100kg玉米淀粉、4kg甘油、4kg山梨醇、6kg水、0.5kg普鲁兰酶加入到高速混合机中,搅拌10min后,出料至捏合机中,在70℃下捏合反应10h,让酶与淀粉充分反应,反应完全后出料,在95℃下烘料5h,完全冷却后加入到高速搅拌机中,加入20kg PBAT、8kg PVA、8kg硬脂酸继续搅拌30min后,出料至双螺杆挤出机,进行挤出造粒,挤出机温度设定为120℃~155℃,拉条后自然冷却、切粒,得到高淀粉含量全生物降解母粒。
实施例2
将100kg红薯淀粉、7kg甘油、7kg水、0.3kg普鲁兰酶加入到高速混合机中,搅拌10min后,出料至捏合机中,在70℃下捏合反应10h,让酶与淀粉充分反应,反应完全后出料,在90℃下烘料5h,完全冷却后加入到高速搅拌机中,加入15kg PLA、7kg乙烯丙烯酸甲酯共聚物、7kg硬脂酸酰胺继续搅拌30min后,出料至双螺杆挤出机,进行挤出造粒,挤出机温度设定为120℃~155℃,拉条后自然冷却、切粒,得到高淀粉含量全生物降解母粒。
实施例3
将100kg土豆淀粉、8kg乙二醇、8kg水、0.5kgα-异淀粉酶加入到高速混合机中,搅拌10min后,出料至捏合机中,在70℃下捏合反应10h,让酶与淀粉充分反应,反应完全后出料,在100℃下烘料5h,完全冷却后加入到高速搅拌机中,加入10kg PBS、7kg EAA、6kg硬脂酸甘油酯继续搅拌30min后,出料至双螺杆挤出机,进行挤出造粒,挤出机温度设定为120℃~155℃,拉条后自然冷却、切粒,得到高淀粉含量全生物降解母粒。
实施例4
将100kg马铃薯淀粉、3kg乙二醇、4kg山梨醇、8kg水、0.4kgα-异淀粉酶加入到高速混合机中,搅拌10min后,出料至捏合机中,在70℃下捏合反应10h,让酶与淀粉充分反应,反应完全后出料,在100℃下烘料5h,完全冷却后加入到高速搅拌机中,加入10kg PCL、6kg EAA、6kg油酸酰胺继续搅拌30min后,出料至双螺杆挤出机,进行挤出造粒,挤出机温度设定为120℃~155℃,拉条后自然冷却、切粒,得到高淀粉含量全生物降解母粒。
实施例5
将50kg实施例1中制得的高淀粉含量全生物降解母粒与50kg PBAT加入到高速搅拌机中混合10min,放料至双螺杆挤出机中造粒,再经吹膜机制成25μm厚度的薄膜。
对比例1
将100kg玉米淀粉、4kg甘油、4kg山梨醇、6kg水加入到高速混合机中,搅拌10min后,出料至捏合机中,在70℃下捏合反应10h,反应完全后出料,在95℃下烘料5h,完全冷却后加入到高速搅拌机中,加入20kg PBAT、8kg PVA、8kg硬脂酸继续搅拌30min后,出料至双螺杆挤出机,进行挤出造粒,挤出机温度设定为140~175℃,拉条后自然冷却、切粒,得到高淀粉含量全生物降解母粒。
对比例2
将50kg对比例1中制得的高淀粉含量全生物降解母粒与50kg PBAT加入到高速搅拌机中混合10min,放料至双螺杆挤出机中造粒,再经吹膜机制成25μm厚度的薄膜。
对实施例1~实施例5、对比例1、对比例2制得的全生物降解母粒进行性能测试,测试的结果如表1、表2所示:
表1
表2
由表1、表2可以看出,实施例1-4经淀粉剪支酶处理后的淀粉为原料,支链淀粉比例大大降低,塑化能力加强,制备淀粉降解母粒过程中,塑化效果好,温度控制在120~155℃能够较顺利的挤出,同时熔体压力较小、降解母粒表面光滑,而对比例1中,不经淀粉剪支酶处理,支链淀粉比例加大,塑化效果较差,挤出温度较高140~175℃,同时熔体压力较大、母粒表面粗糙,同时力学性能也较差。
实施例5与对比例2相比,制备的薄膜由于实施例5中使用的淀粉支链比例较小,增加了淀粉的分散能力,从而提升母粒的透明性,使得再制备薄膜时,薄膜的透明度较高,且薄膜的力学性能得到进一步加强。
上述虽然结合实施例对本发明的具体实施方式进行了描述,但并非对本发明保护范围的限制,所属领域技术人员应该明白,在本发明的技术方案的基础上,本领域技术人员不需要付出创造性劳动即可做出的各种修改或变形仍在本发明的保护范围以内。
Claims (10)
1.一种高淀粉含量全生物降解母粒,其特征在于:包括按如下重量份原料:
植物淀粉 100份
生物降解树脂 5-40份
淀粉剪支酶 0.1-1份
增塑剂 5-15份
去离子水 5-10份
相容剂 5-10份
润滑剂 6-8份。
2.如权利要求1所述一种高淀粉含量全生物降解母粒,其特征在于:所述重量份原料为:
植物淀粉 100份
生物降解树脂 10-20份
淀粉剪支酶 0.1-0.5份
增塑剂 5-8份
去离子水 6-8份
相容剂 6-8份
润滑剂 6-8份。
3.如权利要求1所述一种高淀粉含量全生物降解母粒,其特征在于:所述植物淀粉为玉米淀粉、红薯淀粉、马铃薯淀粉中的一种或两种以上组成。
4.如权利要求1所述一种高淀粉含量全生物降解母粒,其特征在于:所述生物降解树脂为PBAT、PLA、PBS、PCL、PHA中的一种或两种以上组成。
5.如权利要求1所述一种高淀粉含量全生物降解母粒,其特征在于:所述淀粉剪支酶为普鲁兰酶或α-异淀粉酶。
6.如权利要求1所述一种高淀粉含量全生物降解母粒,其特征在于:所述增塑剂为甘油、乙二醇、山梨醇中的一种或两种以上组成。
7.如权利要求1所述一种高淀粉含量全生物降解母粒,其特征在于:所述相容剂为乙烯丙烯酸共聚酯、乙烯丙烯酸甲酯共聚物、聚乙烯醇中的一种或两种以上组成。
8.如权利要求1所述一种高淀粉含量全生物降解母粒,其特征在于:所述的润滑剂为硬脂酸、硬脂酸甘油酯、月桂酸甘油酯、硬脂酸酰胺、油酸酰胺中的一种或两种以上组成。
9.如权利要求1所述高淀粉含量全生物降解母粒的制备方法,其特征在于:包括以下步骤:按上述重量份配比将植物淀粉、增塑剂、水、淀粉剪支酶加入到高速混合机中,搅拌10min后,出料至捏合机中,在60~70℃下捏合反应10h,让酶与淀粉充分反应,反应完全后出料,在90~100℃下烘料5~10小时,完全冷却后加入到高速搅拌机中,加入生物降解树脂、相容剂、润滑剂继续搅拌30min后,出料至双螺杆挤出机,进行挤出造粒,挤出机温度设定为120℃~155℃,拉条后自然冷却、切粒,得到高淀粉含量全生物降解母粒。
10.如权利要求9所述高淀粉含量全生物降解母粒的制备方法,其特征在于:所述捏合反应的温度为70℃,烘料温度为95℃,挤出机温度设定为130-140℃。
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