本文選題：纖維素再生薄膜　切入點(diǎn)：自增強(qiáng)　出處：《青島科技大學(xué)》2017年碩士論文

【摘要】：纖維素可經(jīng)過工藝處理制備得到纖維素微纖、纖維素納米線和纖維素納米晶須。這些微納米級(jí)的纖維素可以作為橡膠、聚氨酯等材料的增強(qiáng)劑。纖維素直接再生制備的薄膜有脆性并且強(qiáng)度不高。為此,本論文第一部分工作是將纖維素原料進(jìn)行簡單工藝處理-球磨,并將球磨粉末作為纖維素薄膜的自增強(qiáng)劑。結(jié)果顯示球磨粉末不僅促進(jìn)纖維素的溶解還可作為自增強(qiáng)劑,同時(shí)提高拉伸性能與扯斷伸長率�？刂魄蚰r(shí)間可以實(shí)現(xiàn)機(jī)械性能提升的調(diào)控,二者具有良好的相關(guān)性。纖維素溶液濃度的提高和較高分子量的纖維素原材料對纖維素再生薄膜的性能均有提高。本論文的第二部分重點(diǎn)研究高分子量纖維素對低分子量纖維素的增強(qiáng)作用。結(jié)果發(fā)現(xiàn),高聚合度的纖維素與低聚合度的纖維素混合溶解不影響其耐熱性和透明性,同時(shí)明顯提高機(jī)械性能。甲殼素和纖維素同屬多糖類生物質(zhì),性質(zhì)相似并且甲殼素上的氨與纖維素上的羥基可形成氫鍵物理交聯(lián)網(wǎng)絡(luò)。同時(shí)甲殼素納米線具有較好的柔韌性和強(qiáng)度。因此,論文的第三部分探究了甲殼素納米纖維對再生纖維素薄膜材料的增強(qiáng),扯斷伸長率提高幅度達(dá)到100%。對纖維素薄膜的增強(qiáng)研究有助于拓展纖維素在薄膜領(lǐng)域的應(yīng)用,逐漸取代石油化工產(chǎn)品薄膜等,減緩化工薄膜對環(huán)境的污染和危害。
[Abstract]:Cellulose, cellulose nanowires and cellulose nanocrystalline whiskers can be prepared by processing cellulose. These micro- and nanocrystalline cellulose can be used as rubber, The film prepared by direct regeneration of cellulose has brittleness and low strength. The results show that the ball milling powder not only promotes the dissolution of cellulose, but also can be used as self-reinforcing agent. At the same time, the tensile properties and elongation at break can be improved, and the mechanical properties can be improved by controlling the milling time. There is a good correlation between the two methods. Both the increase of cellulose solution concentration and the improvement of the properties of cellulose regenerated film by higher molecular weight cellulose raw materials. The second part of this thesis focuses on the study of the effects of high molecular weight cellulose on the properties of cellulose regenerated film. The enhancement of low molecular weight cellulose. The mixed dissolution of cellulose with high degree of polymerization and low degree of polymerization does not affect its heat resistance and transparency, and at the same time obviously improves its mechanical properties. The properties are similar and the ammonia on chitin and hydroxyl on cellulose can form a physical crosslinking network of hydrogen bonds. Meanwhile, chitin nanowires have good flexibility and strength. In the third part of the paper, the enhancement of chitin nanofibers to regenerated cellulose film materials was investigated, and the elongation at break increased to 100%. The enhancement of cellulose film is helpful to expand the application of cellulose in the field of film. Gradually replace the petrochemical film and so on, reduce the pollution and harm of chemical film to the environment.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ352.79;TB383.2

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本文編號(hào)：1699093