Title:
METHOD FOR PREPARING CHITOSAN COMPLEX FILM
Document Type and Number:
WIPO Patent Application WO/2016/155107
Kind Code:
A1
Abstract:
The present invention discloses a method for preparing a chitosan complex film, comprising the following steps of: (1) reacting polyvinyl alcohol-124 with butanedioic anhydride to obtain a modified polyvinyl alcohol; (2) formulating the modified polyvinyl alcohol into a 0.4wt% aqueous solution, then adding chitosan dropwise into an acetic acid solution at a concentration of 0.4wt% to obtain a mixed solution; (3) adjusting the pH of the mixed solution with a 0.01wt% NaOH solution to pH 5.5, and removing surface bubbles after standing for one hour to obtain a casting film solution; (4) pouring the casting film solution into a culture dish, placing the culture dish into an oven at 60ºC and drying to a constant weight to obtain the chitosan complex film. The materials used by the method are inexpensive, and the reaction is not complicated, so the cost of the product is not too high. It will easily be accepted by most common patients as a medical anti-adhesion film.
Inventors:
NI CAIHUA (CN)
TAO LEI (CN)
ZHANG LIPING (CN)
TAO LEI (CN)
ZHANG LIPING (CN)
Application Number:
PCT/CN2015/079963
Publication Date:
October 06, 2016
Filing Date:
May 27, 2015
Export Citation:
Assignee:
UNIV JIANGNAN (CN)
International Classes:
C08L5/08; C08J5/18; C08L29/04
Domestic Patent References:
| WO2011099460A1 | 2011-08-18 |
Foreign References:
| CN101798393A | 2010-08-11 | |||
| CN102671555A | 2012-09-19 | |||
| CN101007243A | 2007-08-01 | |||
| US20080110370A1 | 2008-05-15 | |||
| EP0275100B1 | 1992-06-17 |
Attorney, Agent or Firm:
WUXI SINO INTELLECTUAL PROPERTY AGENCY, LTD. (CN)
无锡互维知识产权代理有限公司 (CN)
无锡互维知识产权代理有限公司 (CN)
Download PDF:
Previous Patent: PHYSICAL KEYBOARD AND NETWORK ACCESS METHOD
Next Patent: DYNAMIC DISPLAY SYSTEM FOR TUNNEL IN TRAIN BODY
Next Patent: DYNAMIC DISPLAY SYSTEM FOR TUNNEL IN TRAIN BODY