...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Holzforschung >From hollow lignin microsphere preparation to simultaneous preparation of urea encapsulation for controlled release using industrial kraft lignin via slow and exhaustive acetone-water evaporation
【24h】

From hollow lignin microsphere preparation to simultaneous preparation of urea encapsulation for controlled release using industrial kraft lignin via slow and exhaustive acetone-water evaporation

机译：从空心木质素微球制备到同时制备尿素胶囊以通过缓慢且彻底的丙酮-水蒸发利用工业牛皮纸木质素进行控释

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Lignin nano/microparticles have recently attracted growing interest for various value-additive applications of lignin, especially encapsulation. In this study, in order to establish a highly efficient and highly productive preparation process to effectively utilize technical lignin, a brand-new, slow and exhaustive solution evaporation process following a simple, self-assembly principle was developed using industrial softwood kraft lignin (SKL) from a starting acetone-water (80/20, v/v) solution to recover 100% of the lignin as homogeneous and well-shaped microspheres. The prepared microspheres had a typical average diameter of 0.81 +/- 0.15 mu m and were hollow with very thin shells (of nanoscale thickness). Based on this developed technique, encapsulation of urea by these lignin microspheres was directly achieved using the same process as hollow lignin microspheres with urea attached to the outside and entrapped inside of the wall. Two distinct urea release rates were observed for the urea-encapsulated microspheres: a fast release of the urea outside the shell wall and a slow (controlled) release of the urea inside the shell wall. The encapsulation efficiency was as high as 46% of the trapped urea as encapsulated inside the lignin microspheres. The slow and exhaustive solution evaporation procedure reported here is a simple and straightforward method for the valorization of industrial kraft lignin as hollow microspheres with controllable, homogeneous and desired morphologies, and especially for the direct preparation of lignin-based encapsulating fertilizers for controlled release.
机译：木质素纳米/微粒最近对木质素的各种增值应用特别是封装引起了越来越多的兴趣。在这项研究中，为了建立一种高效，高产的制备工艺来有效利用工业用木质素，使用工业软木牛皮纸木质素（SKL）开发了一种遵循简单，自组装原理的全新，缓慢且穷举的溶液蒸发工艺。 ）从起始的丙酮-水（80/20，v / v）溶液中回收100％的木质素，形成均匀且形状良好的微球。制备的微球的典型平均直径为0.81 +/-0.15μm，并且是空心的，具有非常薄的壳（纳米级厚度）。基于这种发达的技术，这些木质素微球对尿素的包封是通过与中空木质素微球相同的过程直接实现的，其中空心尿素附着在壁上，而尿素附着在壁的内部。对于尿素包封的微球，观察到两种不同的尿素释放速率：尿素在壳壁外部的快速释放和尿素在壳壁内部的缓慢（受控）释放。包封率高达木质素微球内包封尿素的46％。本文报道的缓慢而详尽的溶液蒸发程序是一种简单而直接的方法，用于将工业牛皮纸木质素作为具有可控，均质和所需形态的空心微球进行增值，尤其是直接制备木质素基包封肥料以进行受控释放。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号