Extraction Method And Experimental Study Of Bio-cellulose Used To Reinforce Rubber

Cellulose fiber has highly hygroscopicity and strong air permeability,and it is deeply loved by consumers.However,most of production uses traditional viscose process,which has large energy consumption and long production process,and releases a large amount of such as CS2 and H2S during the production process.A class of polluting gas not only has a high production cost,but also causes serious pollution to the environment.Therefore,it is particularly important to develop a new type of environmentally friendly cellulose fiber production process to replace the traditional ones.The method of extracting cellulose with low temperature alkali/urea combination solution can improve production efficiency,optimize product performance,reduce energy consumption,solve environmental pollution problems,and have unique advantages.It has become one of the cellulose preparation methods.At present,there are studies on the extraction of cellulose from agricultural wastes using this method or improved methods.This article mainly carried out the research of extracting cellulose from garlic skin with alkali/urea/potassium permanganate compound solution.After pretreatment of agricultural garbage garlic skin,the alkali/urea/potassium permanganate compound solution was used to extract garlic skin cellulose,and using this cellulose to reinforce natural rubber,a cellulose/rubber composite material with good dispersibility had been prepared,and it has been achieved good results at persent.The main work in this article is as follows:1.First proposed the method of extracting cellulose in garlic skin with low temperature alkali/urea/potassium permanganate solution,which solved the problem of cellulose crystallization,improved the cellulose crystallinity and crystallization efficiency in garlic skin.After adding potassium permanganate,cellulose and potassium permanganate could crystallize at the same time,then potassium permanganate destroyed the dissolution system,which could produce cellulose with higher CrI.2.It was proposed a method of using cellulose in garlic skin for natural rubber,and prepared cellulose/rubber composite material with good dispersibility.The latex network structure restricted the growth of cellulose,avoided excessive agglomeration of cellulose,produced a stable and uniform dispersion system of cellulose in rubber.3.It had been using the low temperature alkali/urea compound solution to extract the cellulose in the garlic skin,through testing various parameters such as micro-morphology;molecular group;particle size;crystal type.thermogravimetric analysis of cellulose extracted by different acid,and the test results showed that the CrI of AC,SC and HC were 31.5%,51.2%and 66.5%.SC had a shaped lattice morphology,and there were a large amount of nano-sized cellulose in SC and HC,but chemical analysis showed that SO₃^2-in sulfuric acid would cause cellulose to release a single crystallite,then reduced crystallinity.In terms of particle size,the structure of AC was very loose,and AC had the largest SMD of 110μm.4.The experimental results of cellulose/rubber composite materials showed that the crystallinity of cellulose had an important influence on the dispersibility of cellulose.The higher the crystallinity,the better the dispersibility of cellulose,and experiments had proved that acid had no effect on Payne effect.Finally,it is concluded that when the cellulose is treated with acid,the stronger the acid used,the better the crystallinity of the cellulose obtained.However,when using sulfuric acid treatment to treat cellulose,the cellulose would be affected by SO₃^2-,the cellulose would release a single crystallite,and finally reduce the crystallinity.And the higher the crystallinity of cellulose,the better the dispersibility of cellulose in the preparation of cellulose/nature rubber composites.It also could use strong oxidizing substances such as potassium permanganate to increase the crystallinity.These studies are of great significance to the development of green chemistry and cellulose extraction process.