Polyfoam using plant fiber as material and its preparation method

A technology of plant fibers and foam plastics, applied in the field of foam plastics and its preparation, can solve the problems of unsuitable economy, increased environmental burden, and increased liquefaction cost, and achieve the effects of improving liquefaction efficiency, low cost, and reducing pollution

Inactive Publication Date: 2004-11-17
SUN YAT SEN UNIV
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chemical modification of plant fibers will increase the cost of liquefaction and will increase the environmental burden, which is economically inappropriate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0017] The preparation steps are:

[0018] 1), preparation of liquefied plant fiber:

[0019] Raw materials: 40 mesh pine wood powder, phenol as solvent. Reaction temperature: 150°C, reaction time: 90min. Feeding method: one-time addition or divided into two additions (first add 2 / 3, then add 1 / 3), the results of the liquefaction reaction are shown in Table 1. Metal chloride salts are penetrating agents, which can enhance the diffusion of phenol in plant fibers and increase the probability of reaction. Adding pine wood powder in batches can increase the proportion of solvent in the initial reaction system, which is beneficial to the liquefaction of plant fibers.

[0020] 2), preparation of lignocellulosic base resole phenolic resin:

[0021] Get each example liquefied pine wood as raw material, after measuring the phenolic hydroxyl value of liquefied wood, phenol: formaldehyde=1: 1.6; Catalyst NaOH consumption accounts for 1% of phenol. Weigh the above-mentioned liquefied...

Embodiment 6～9

[0028] The preparation method is the same as that of Examples 1-5. However, before the original plant fiber is liquefied, the plant fiber powder is subjected to ultraviolet radiation pretreatment for different periods of time using ultraviolet lamps of different powers. The specific method is as follows: raw materials: 40 mesh pine wood powder, phenol as solvent, pine wood powder / phenol=1. During ultraviolet treatment, the distance between pine wood powder and ultraviolet lamp is: 20cm; reaction temperature: 100°C, reaction time: 90min; catalyst: 1% sulfuric acid, 5% p-toluenesulfonic acid, 1% stannous chloride; The way of adding pine wood powder: one-time addition; the results of liquefaction reaction are shown in Table 2. Ultraviolet light irradiation may accelerate the degradation of lignin, thereby improving the liquefaction performance of plant fibers. It can also be seen from Table 2 that with the increase of the power of the ultraviolet lamp, the liquefaction performa...

Embodiment 10-11

[0031] The preparation method is the same as that of Examples 1-5. However, prior to liquefaction, the raw plant fibers are pretreated with gamma rays or gamma rays combined with ultraviolet radiation. The specific method is as follows: raw materials: 40 mesh pine wood powder, phenol as solvent, pine wood powder / phenol=1. After irradiating the pine wood powder with different doses of gamma rays, and then irradiating it with a 2000W ultraviolet lamp, the distance between the pine wood powder and the ultraviolet lamp is: 20cm, and the irradiation time is 10 hours; the reaction temperature is 100°C, the reaction time is 90min; the catalyst is : 1% sulfuric acid, 5% p-toluenesulfonic acid, 1% stannous chloride; the addition method of pine wood powder: one-time addition; specific reaction results are shown in Table 3. Pine flour by Co 60 After irradiation, the chemical structure of the lignocellulosic material will change, and the high-energy radiation will destroy the crystallin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a polyfoam using plant fiber as material wherein its preparation method comprises reacting liquefied plant fiber with methyl aldehyde, creating bakelite an and foaming, the process for preparing liquefied plant fiber includes pre-treating through ultraviolet radiation and gamma-ray irradiation, then liquefied plant fiber is obtained by oxybenzene dissolving method.

Description

technical field [0001] The invention relates to a biodegradable foamed plastic with natural plant fiber as raw material and a preparation method thereof. Background technique [0002] Foam plastic is an important packaging and construction material, which has been widely used in various fields such as food, electrical appliances, furniture, and home furnishing. However, various foam plastics made of synthetic resin are difficult to degrade under natural conditions, thereby increasing the burden on the environment, which is called "white pollution". In order to solve this problem, making use of the degradability of plant fibers to prepare foamed plastics is one of the alternative methods. In order to achieve this goal, the liquefaction of plant fibers is the first problem that needs to be solved. [0003] Plant fiber is an extremely abundant renewable natural composite material in nature. Due to the increasing energy crisis and environmental pollution, the full and reasonab...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02
Inventor 容敏智章明秋石光
Owner SUN YAT SEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap