本文選題：雙網(wǎng)絡(luò)　切入點(diǎn)：水凝膠　出處：《長(zhǎng)春工業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：作為一種新型高分子材料,水凝膠在工農(nóng)業(yè)、生物醫(yī)藥、材料等各領(lǐng)域中顯示出很好的前景。但是由于傳統(tǒng)高分子水凝膠的機(jī)械強(qiáng)度比較弱,很大程度上限制了水凝膠的實(shí)際應(yīng)用。因此,制備高力學(xué)強(qiáng)度水凝膠具有非常重要的意義。本文采用不同的原料和方法制備了三種高強(qiáng)度雙網(wǎng)絡(luò)水凝膠:(1)以聚乙烯醇(PVA)和聚乙二醇(PEG)為原料,通過(guò)簡(jiǎn)單的凍融法和高能電子束輻照相結(jié)合制備了高強(qiáng)度PVA/PEG水凝膠�？疾炝薖EG的分子量,PVA與PEG的比例,解凍溫度以及循環(huán)凍融次數(shù)對(duì)水凝膠性能的影響。結(jié)果表明,當(dāng)PEG的分子量為4000,PVA與PEG的比例為10:4,解凍溫度為30℃,凍融次數(shù)為3次時(shí),水凝膠的拉伸強(qiáng)度最大達(dá)到746 k Pa。(2)以聚乙烯醇(PVA)、聚乙二醇(PEG)以及無(wú)機(jī)膨潤(rùn)土(Inorganic Bentonite,IB)為原料,通過(guò)簡(jiǎn)單的凍融法制備了高強(qiáng)度的粒子增強(qiáng)PVA/PEG/IB水凝膠。考察了不同加入量的IB粒子對(duì)水凝膠強(qiáng)度的影響。結(jié)果表明,當(dāng)IB含量為5%(w/v)時(shí),PVA/PEG/IB水凝膠的拉伸強(qiáng)度高達(dá)1.1 MPa,并且水凝膠的摩擦系數(shù)隨著IB含量的逐漸增加而減小。(3)以聚乙烯醇(PVA)和丙烯酰胺(AM)為原料,通過(guò)紫外輻照與凍融相結(jié)合的方法,制備了物理-化學(xué)混雜交聯(lián)的PVA/PAAm雙網(wǎng)絡(luò)水凝膠。結(jié)果表明,該混雜雙網(wǎng)絡(luò)水凝膠具有較高的拉伸強(qiáng)度(428 k Pa),并具有一定的自愈合性能。
[Abstract]:As a new kind of polymer material, hydrogel has a good prospect in the fields of industry and agriculture, biomedicine, material and so on. However, the mechanical strength of traditional polymer hydrogel is relatively weak. To a large extent, the practical application of hydrogels is limited. The preparation of high mechanical strength hydrogels is of great significance. In this paper, three kinds of high strength double network hydrogels, polyvinyl alcohol (PVA) and polyethylene glycol (PEG), were prepared by using different raw materials and methods. High strength PVA/PEG hydrogels were prepared by a simple freeze-thaw method combined with high energy electron beam irradiation. The effects of molecular weight ratio of PEG to PEG, thawing temperature and the number of cycles of freezing and thawing on the properties of hydrogels were investigated. When the molecular weight of PEG is 10: 4, thawing temperature is 30 鈩，

本文編號(hào)：1648540