CN106700655A - 一种氨基硫脲‑双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体及其制备方法 - Google Patents

一种氨基硫脲‑双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体及其制备方法 Download PDF

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CN106700655A
CN106700655A CN201610915013.0A CN201610915013A CN106700655A CN 106700655 A CN106700655 A CN 106700655A CN 201610915013 A CN201610915013 A CN 201610915013A CN 106700655 A CN106700655 A CN 106700655A
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calcium carbonate
dialdehyde starch
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王文杰
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Qingyang Jinshan Flour Co Ltd
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Abstract

本发明公开了一种氨基硫脲‑双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体，该纳米碳酸钙粉体是由碳化法制备得到，并在制备过程中以去离子水/无水乙醇作为溶剂，加入硅烷偶联剂kh550、双醛淀粉进行改性处理，获得了具有一定自分散性的表面包覆双醛淀粉的纳米碳酸钙粉体，并在氨基硫脲的作用下交联形成牢固的双醛淀粉‑氨基硫脲聚合物，从而获得具有良好疏水性、分散性、热流动性的纳米碳酸钙粉体，作为塑料填料时具有良好的增塑性，填充改性效果更佳。

Description

一种氨基硫脲-双醛淀粉交联聚合物包覆改性的纳米碳酸钙 粉体及其制备方法
技术领域
本发明涉及改性碳酸钙技术领域，尤其涉及一种氨基硫脲-双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体及其制备方法。
背景技术
碳酸钙粉体是一种十分常见的无机材料，其主要应用于造纸、橡胶、塑料、涂料、油墨等产品中作为补强填料。碳酸钙粉体表面极性高，亲水疏油，与有机相相容性差，极易团聚，分散性差，达不到令人满意的填充改性效果，需要对其进行表面改性处理，以提高其使用性能，目前应用较多的改性方法有局部反应改性、表面包覆改性、高能表面改性及机械改性法。
碳酸钙的表面包覆改性是利用有机或无机材料在碳酸钙表面进行包覆处理，其能有效的提高被包覆粒子的稳定性和分散性，较之其它类改性方法具有较为突出的优势。《壳聚糖—己二酸双重包覆改性碳酸钙的界面特性研究》一文利用己二酸、壳聚糖对碳酸钙进行双重包覆，获得了具有良好分散性，同时引入壳聚糖独特的性能，进一步拓宽了碳酸钙的使用范围，然而包覆物质在研磨过程中容易脱落，导致改性效果的丧失，因此提高包覆改性基团与碳酸钙的结合力是行业迫需解决的问题。
发明内容
本发明目的就是为了弥补已有技术的缺陷，提供一种氨基硫脲-双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体及其制备方法。
本发明是通过以下技术方案实现的：
一种氨基硫脲-双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体，该纳米碳酸钙粉体由以下重量份的原料制成：氧化钙10-20、二氧化碳（工业纯）适量、浓度为5-10%的氨基硫脲溶液10-15、双醛淀粉2-3、硅烷偶联剂kh550 0.4-0.5、去离子水100-200、无水乙醇10-20。
所述的一种氨基硫脲-双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体的制备方法包括以下步骤：
（1）先将无水乙醇、去离子水、双醛淀粉依次投入反应容器中，在氮气氛围下搅拌混合20-30min后将体系加热至80-85℃，紧接着加入氧化钙，研磨搅拌消化2-3h，形成氢氧化钙浆料，陈化10-15h后备用；
（2）开启搅拌装置，向步骤（1）制备的浆液中滴加硅烷偶联剂kh550，滴加完毕后开始通二氧化碳气体，至体系pH值稳定为中性时停止通气，接着滴加氨基硫脲溶液，继续搅拌混合反应2-5h，反应结束后体系过滤，过滤物经洗涤、真空干燥、分散，即得所述的改性纳米碳酸钙粉体。
本发明利用碳化法制备了纳米碳酸钙粉体，在制备过程中以去离子水/无水乙醇作为溶剂，加入硅烷偶联剂kh550、双醛淀粉进行改性处理，获得了具有一定自分散性的表面包覆双醛淀粉的纳米碳酸钙粉体，并在氨基硫脲的作用下交联形成牢固的双醛淀粉-氨基硫脲聚合物，从而获得具有良好疏水性、分散性、热流动性的纳米碳酸钙粉体，作为塑料填料时具有良好的增塑性，填充改性效果更佳。
具体实施方式
一种氨基硫脲双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体，该纳米碳酸钙粉体由以下重量份的原料制成：氧化钙10、二氧化碳（工业纯）适量、浓度为5%的氨基硫脲溶液10、双醛淀粉2、硅烷偶联剂kh550 0.4、去离子水100、无水乙醇10。
该改性纳米碳酸钙的制备方法包括以下步骤：
（1）先将无水乙醇、去离子水、双醛淀粉依次投入反应容器中，在氮气氛围下搅拌混合20min后将体系加热至80℃，紧接着加入氧化钙，研磨搅拌消化2h，形成氢氧化钙浆料，陈化10h后备用；
（2）开启搅拌装置，向步骤（1）制备的浆液中滴加硅烷偶联剂kh550，滴加完毕后开始通二氧化碳气体，至体系pH值稳定为中性时停止通气，接着滴加氨基硫脲溶液，继续搅拌混合反应2h，反应结束后体系过滤，过滤物经洗涤、真空干燥、分散，即得所述的改性纳米碳酸钙粉体。
制得的纳米碳酸钙粉体性能测试结果为：
粒度D50：248nm；粘度：28.2mPa.s；活化度：98%；吸油值：27.2；沉降体积：1.02ml/g。

Claims (2)

1.一种氨基硫脲-双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体，其特征在于，该纳米碳酸钙粉体由以下重量份的原料制成：氧化钙10-20、二氧化碳（工业纯）适量、浓度为5-10%的氨基硫脲溶液10-15、双醛淀粉2-3、硅烷偶联剂kh5500.4-0.5、去离子水100-200、无水乙醇10-20。
2.如权利要求1所述的一种氨基硫脲-双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体的制备方法，其特征在于，其制备方法包括以下步骤：
（1）先将无水乙醇、去离子水、双醛淀粉依次投入反应容器中，在氮气氛围下搅拌混合20-30min后将体系加热至80-85℃，紧接着加入氧化钙，研磨搅拌消化2-3h，形成氢氧化钙浆料，陈化10-15h后备用；
（2）开启搅拌装置，向步骤（1）制备的浆液中滴加硅烷偶联剂kh550，滴加完毕后开始通二氧化碳气体，至体系pH值稳定为中性时停止通气，接着滴加氨基硫脲溶液，继续搅拌混合反应2-5h，反应结束后体系过滤，过滤物经洗涤、真空干燥、分散，即得所述的改性纳米碳酸钙粉体。
CN201610915013.0A 2016-10-20 2016-10-20 一种氨基硫脲‑双醛淀粉交联聚合物包覆改性的纳米碳酸钙粉体及其制备方法 Pending CN106700655A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113943498A (zh) * 2020-07-17 2022-01-18 湖南磊鑫新材料科技有限公司 一种餐具用碳酸钙的改性方法
CN115139596A (zh) * 2022-07-14 2022-10-04 道恩周氏(青岛)复合包装材料有限公司 一种高透明醋酸纤维素生物降解复合膜及其制备方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113943498A (zh) * 2020-07-17 2022-01-18 湖南磊鑫新材料科技有限公司 一种餐具用碳酸钙的改性方法
CN115139596A (zh) * 2022-07-14 2022-10-04 道恩周氏(青岛)复合包装材料有限公司 一种高透明醋酸纤维素生物降解复合膜及其制备方法
CN115139596B (zh) * 2022-07-14 2023-08-25 道恩周氏(青岛)复合包装材料有限公司 一种高透明醋酸纤维素生物降解复合膜及其制备方法

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