Composite material of modified micro plant fiber powder and natural rubber and its prepn process and application

Abstract

The present invention discloses one kind of composite material of modified micro plant fiber powder and natural rubber and its preparation process and application. The composite material includes natural rubber or latex 100 weight portions, modified micro plant fiber powder 1-60 weight portions, sulfur 0.5-3.3 weight portions, promoter 1.2-4.3 weight portions, antiager 1-3 weight portions and other assistant. The preparation process includes mixing, forming, vulcanizing and other steps. The composite material has high tensile strength, high tearing strength, high ageing resistance, high virus permeation resistance, etc. and may be used widely in making urinary catheter, blood transfusion tube, condom, medical gloves and other products.

Description

technical field [0001] The invention relates to a modified plant fiber micropowder composite material with natural rubber as a raw material and a preparation method thereof, as well as in the preparation of urinary catheters, blood transfusion hoses, condoms, medical gloves, examination gloves, foam materials, bicycle tires, shoe soles and other products Applications. Background technique [0002] Resources are the basis for sustainable development, and the sustainable use of resources is the basic prerequisite for sustainable development. Therefore, we must strive to find a "coordinated population, economy, society, environment and resources that can meet the needs of contemporary people while A sustainable development path that does not jeopardize the ability to meet the needs of future generations". [0003] Natural rubber, produced from Hevea brasiliensis, is an important industrial raw material and strategic material, and has always been valued...

AI Technical Summary

Problems solved by technology

[0010] Therefore, a series of research work has been carried out both at home and abroad. Huang Li et al. (Journal of Beijing University of Chemical Technology, 2001, No. 3) soaked straw powder in 75% NaOH solution for 48h, separated the fibers and washed them, and After bleaching, wash with water until neutral, and finally dry in an oven to obtain plant fibers, then add benzoic acid, stearic acid, organosilane and then dry to obtain modified plant fibers. The disadvantage is that the process is complicated, and alkali treatment will produce harmful Environmentally polluted waste water; Li Zhongming et al. (Plastic Industry, 2000, Issue 4) mixed straw and surface treatment agent in a high-speed kneader for 5 minutes, dried in an oven at 80°C for 4 hours, and then mixed with polypropylene to prepare composite materials; Others include alkalization and esterification pretreatment, styrene graft modification, PMMA graft treatment, thermosetting resin coating, silane coupling agent and titanate coupling agent treatment, etc., using dry and wet methods For treatment, the dry method is simple but the effect is often not very satisfactory; although the wet method has obvious effects, it mostly uses organic solvents, which is expensive and not environmentally friendly (Zheng Yutao, Cellulose Science and Technology, Issue 1, 2005)

[0011] But, all natural plant fiber-rubber composite materials and preparation methods that adopt at present still have deficiency:

[0012] 1. Natural plant fiber raw materials, due to the hydrophilicity of the hydroxyl group in the cell wall polymer, the combination with non-polar natural rubber is not good, and the performance of the composite material is not ideal

[0013] 2. In the presence of moisture, the fiber will not only change its mechanical properties and dimensional properties, but also be easily corroded

[0014] 3. Insufficient thermal stability, discoloration and degradation during processing and preparation

[0015] 4. At present, the chemical modification methods such as alkalization and esterification pretreatment, surface grafting, interface coupling, and polymer coating used at home and abroad, as well as physical processing methods such as heat treatment, discharge treatment, and plasma treatment, all have complex processes , have the characteristics of waste generation, pollution to the environment, etc., and most of them are used in the preparation of thermoplastic resin or thermosetting resin composite materials, and are rarely used in natural rubber composite materials

[0016] These have all limited the application of plant fiber in rubber industry