本文關(guān)鍵詞：無(wú)機(jī)納米粒子增韌水凝膠復(fù)合物的制備　出處：《長(zhǎng)春工業(yè)大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 水凝膠 丙烯酰胺 二氧化鈦 力學(xué)性能

【摘要】：水凝膠是通過(guò)高分子鏈之間交聯(lián)形成的聚合物,內(nèi)部能夠儲(chǔ)存很多的水而膨脹,并能維持原來(lái)的交聯(lián)狀態(tài)不溶解。同時(shí),水凝膠是很好的軟材料,在很多方面都有較大應(yīng)用潛能,例如,組織工程、藥物控釋、生物電極、催化反應(yīng)等。傳統(tǒng)水凝膠通常是高分子鏈和化學(xué)交聯(lián)劑(BIS)形成的三維網(wǎng)絡(luò),當(dāng)發(fā)生形變時(shí)剛性化學(xué)鍵容易斷裂,承受外力的能力較差,因而限制其在力學(xué)需求方面的應(yīng)用。無(wú)機(jī)納米粒子表現(xiàn)出很多特異性,凝膠網(wǎng)絡(luò)中加入納米粒子能增強(qiáng)水凝膠力學(xué)行為和賦予水凝膠其他性能。通過(guò)控制各組分加入量,探索加入無(wú)機(jī)納米粒子對(duì)凝膠各種行為的影響。本文選用粘土Laponite和丙烯酰胺單體(AAm)制備Laponite/PAAm復(fù)合水凝膠。以納米二氧化鈦(P25)及疏水基團(tuán)為交聯(lián)劑和丙烯酰胺單體制備二氧化鈦/丙烯酰胺疏水基團(tuán)共聚(TiO_2/P(AAm-HMA))水凝膠。通過(guò)溶脹實(shí)驗(yàn)研究Laponite/PAAm復(fù)合水凝膠溶脹問(wèn)題;通過(guò)拉伸實(shí)驗(yàn)研究無(wú)機(jī)材料和疏水基團(tuán)共同對(duì)水凝膠的增韌機(jī)理。1.以納米粘土(laponite)和N,N-亞甲基雙丙烯酰胺(BIS)為交聯(lián)劑,丙烯酰胺(AAm)為單體,通過(guò)熱引發(fā)合成一系列均勻的粘土/聚丙烯酰胺(laponite/PAAm)復(fù)合水凝膠。通過(guò)溶脹實(shí)驗(yàn)研究不同含量粘土、N,N-亞甲基雙丙烯酰胺、AAm對(duì)Laponite/PAAm復(fù)合水凝膠溶脹行為影響和溶脹動(dòng)力學(xué)問(wèn)題。2.以納米二氧化鈦(P25)、疏水基團(tuán)(HMA)共同作為交聯(lián)劑,丙烯酰胺(AAm)為單體,用紫外光引發(fā)制備二氧化鈦/丙烯酰胺疏水基團(tuán)共聚(TiO_2/P(AAm-HMA))水凝膠。通過(guò)紅外、熱重和透射電鏡對(duì)表面修飾的二氧化鈦進(jìn)行表征。對(duì)二氧化鈦/丙烯酰胺疏水基團(tuán)共聚(TiO_2/P(AAm-HMA))水凝膠力學(xué)性能進(jìn)行測(cè)試,研究不同含量二氧化鈦和疏水基團(tuán)對(duì)納米復(fù)合水凝膠力學(xué)性能影響。本文成功制備了納米粘土/聚丙烯酰胺(laponite/PAAm)復(fù)合水凝膠和二氧化鈦/丙烯酰胺疏水基團(tuán)共聚(TiO_2/P(AAm-HMA))水凝膠。溶脹實(shí)驗(yàn)表明,納米粘土粒子對(duì)水凝膠的溶脹有較大影響。用甲基丙烯酸三甲氧基硅烷對(duì)二氧化鈦表面進(jìn)行改性,使二氧化鈦具有引發(fā)劑和交聯(lián)劑的雙重功能,而體系不用加入其他交聯(lián)劑。通過(guò)力學(xué)性能測(cè)試表明,加入二氧化鈦和疏水基團(tuán)能夠顯著增加水凝膠的力學(xué)性能。
[Abstract]:Hydrogel is a kind of polymer formed by crosslinking between polymer chains. It can store a lot of water and expand inside, and it can keep the original crosslinking state insoluble. At the same time, hydrogel is a good soft material. There are many potential applications, such as tissue engineering, controlled drug release, biological electrodes, catalytic reactions, etc. Traditional hydrogels are usually three-dimensional networks formed by polymer chains and chemical crosslinker BISs. When deformation occurs, rigid chemical bonds are easy to break and the ability to bear external forces is poor, which limits their application in mechanical requirements. Inorganic nanoparticles show many specialties. The addition of nano-particles into the gel network can enhance the hydrogel mechanical behavior and give other properties to the hydrogel. The effects of inorganic nanoparticles on the gel behavior were investigated. Clay Laponite and acrylamide monomer Aam were used in this paper. Laponite/PAAm composite hydrogels were prepared. TIO _ 2 / acrylamide hydrophobic group copolymerization was prepared using nano-TiO _ 2 P25) and hydrophobic group as crosslinking agent and acrylamide monomer. The swelling problem of Laponite/PAAm composite hydrogels was studied by swelling experiment. The toughening mechanism of hydrogel by inorganic materials and hydrophobic groups was studied by tensile test. 1. Nano-clay and N- N- methylene bisacrylamide (BIS) were used as crosslinkers. A series of homogeneous clay / polyacrylamide laponite / pam composite hydrogels were synthesized by thermal initiation of acrylamide (Aam) as monomer, and different contents of clay were studied by swelling experiment. Effects of N- N- methylene bisacrylamide Aam on swelling behavior and swelling kinetics of Laponite/PAAm composite hydrogels. Hydrophobic group (HMA) was used as crosslinking agent and acrylamide (Aam) as monomer. TIO _ 2 / acrylamide hydrophobic group copolymerization of TIO _ 2 / acrylamide hydrophobic group was prepared by UV irradiation. The surface modified titanium dioxide was characterized by thermogravimetry and transmission electron microscopy. The mechanical properties of TIO _ 2 / acrylamide hydrophobic group copolymerization of TIO _ 2 / AAm-HMA-O _ 2 were measured. The effects of different contents of titanium dioxide and hydrophobic groups on the mechanical properties of nanocomposite hydrogels were studied. Composite hydrogels and TIO _ 2 / acrylamide hydrophobic group copolymerized with tio _ s _ (2 / P) A _ (Am-HMAN) hydrogels. Swelling test. Nano-clay particles have great influence on the swelling of hydrogel. The surface of titanium dioxide is modified by trimethoxysilane methacrylate to make titanium dioxide have the dual functions of initiator and crosslinking agent. The addition of titanium dioxide and hydrophobic group can significantly increase the mechanical properties of hydrogel.
【學(xué)位授予單位】：長(zhǎng)春工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TQ427.26;TB332

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