These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Cooperative effect of polyethylene glycol and lignin on SiO2 microsphere production from rice husks.
    Author: Lin L, Zhai SR, Xiao ZY, Liu N, Song Y, Zhai B, An QD.
    Journal: Bioresour Technol; 2012 Dec; 125():172-4. PubMed ID: 23026330.
    Abstract:
    A simple method to the preparation of SiO(2) microspheres from rice husks (RH) was developed. The rice husks were extracted with 2M NaOH solution to obtain a extract contained silica and lignin, and silica spheres were obtained after addition of distilled water, ethanol, 1M H(2)SO(4) and PEG (W(silica):W(PEG)=2:1) to the extract in a controllable sol-gel process and calcination at 550°C. The optimum synthesis conditions were, adjustment of the extract to pH 3, a volume ratio of 1:1:2 of ethanol, water, and extract, respectively and a silica to polyethylene glycol weight ratio of 2:1. The SiO(2) microspheres produced under these conditions exhibited a relatively uniform particle size distribution around 500 nm as determined by LPSA, which indicated a cooperative function of added PEG and extracted lignin towards the formation of SiO(2) microspheres.
    [Abstract] [Full Text] [Related] [New Search]