Vacuum freeze-drying method for chitin fiber or chitosan fiber
A vacuum freeze-drying and chitosan fiber technology, which is applied in the direction of drying solid materials, drying solid materials without heating, drying, etc., can solve the problems of increased investment in production equipment, increased production costs, flammability and explosion, etc. To achieve the effect of safe and efficient production process, stable and reliable quality, and excellent quality
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0035] Weigh 3.2664g of chitosan fiber with a moisture content of 69.56%, put it in the refrigerator for pre-freezing for 1 hour, and then put it in a vacuum freeze dryer. The temperature of the cold trap is -50~-85℃, and the vacuum degree is 1~70pa , freeze-dried for 2 hours, took out the dried chitosan fiber, weighed the mass to be 1.1422g, and calculated the moisture content of the dried chitosan fiber to be 12.95%, converted into a fiber moisture regain of 14.88%.
[0036] After testing, the obtained chitosan dry fiber completely retains its own chemical structure and its own good performance, good dispersion and no hard lumps, and the relative density is 0.39±0.03g / cm 3 , fluffy appearance, soft and comfortable feel.
Embodiment 2
[0038] Weigh 3.6233g of chitosan fiber with a moisture content of 69.56%, put it in the refrigerator for pre-freezing for 1 hour, and then put it in a vacuum freeze dryer. The temperature of the cold trap is -50~-85℃, and the vacuum degree is 1~70Pa , freeze-dried for 3 hours, took out the dried chitosan fiber, weighed the mass to be 1.2524g, and calculated the moisture content of the dried chitosan fiber to be 11.93%, which was converted into a fiber moisture regain of 13.55%.
[0039] After testing, the obtained chitosan dry fiber completely retains its own chemical structure and its own good performance, good dispersion and no hard lumps, and the relative density is 0.39±0.03g / cm 3 , fluffy appearance, soft and comfortable feel.
Embodiment 3
[0041] Weigh 2.8209g of chitosan fiber with a moisture content of 69.56%, put it in the refrigerator for pre-freezing for 1 hour, and then put it in a vacuum freeze dryer. The temperature of the cold trap is -50~-85℃, and the vacuum degree is 1~70Pa , freeze-dried for 4 hours, took out the dried chitosan fiber, weighed the mass to be 0.8769g, and calculated the moisture content of the dried chitosan fiber to be 2.08%, converted into a fiber moisture regain of 2.12%.
[0042] After testing, the obtained chitosan dry fiber completely retains its own chemical structure and its own good performance, good dispersion and no hard lumps, and the relative density is 0.39±0.03g / cm 3 , fluffy appearance, soft and comfortable feel.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com