發(fā)布時間：2018-05-04 03:15

  本文選題：鈦酸鉀晶須 + 甲殼素晶須�。� 參考：《青島科技大學(xué)》2015年碩士論文

【摘要】：鈦酸鉀晶須具有優(yōu)良的耐熱性、高熱穩(wěn)定性及極佳的力學(xué)性能,甲殼素晶須有較強(qiáng)的吸附螯合性能、分散性能等。本文分別對兩種晶須進(jìn)行了系統(tǒng)的實(shí)驗(yàn)探究,之后將兩晶須進(jìn)行復(fù)合,制備出機(jī)械強(qiáng)度高、分散性好的復(fù)合晶須膜產(chǎn)品,初步探索復(fù)合晶須的制備及其性能研究。以鈦白粉和KOH為原料,在水熱條件下合成鈦酸鉀晶須,考察了堿液濃度、鉀鈦摩爾比、反應(yīng)溫度和保溫時間對晶須合成的影響,并對產(chǎn)品進(jìn)行SEM、TEM及XRD表征。研究發(fā)現(xiàn)：KOH濃度為5 mol/L、鉀鈦摩爾比為20：1、反應(yīng)溫度為300℃以及保溫時間為5h時,合成的晶須細(xì)長,長徑比均勻,形貌最為理想,其直徑大約為40-50nnm,長徑比為100-150；通過XRD分析可知,產(chǎn)品為六鈦酸鉀晶須。在晶須的合成過程重點(diǎn)考察了分散劑對晶須形貌、結(jié)晶度、熱穩(wěn)定性的影響,分別加入殼聚糖鹽酸鹽、三元聚合物P(CMTC-AM-DMC)和PDMC作為分散劑,并對產(chǎn)品進(jìn)行了SEM、TEM、XRD及TG等表征。結(jié)果表明：PDMC能夠最有效地分散晶須,且添加5%時效果最好,該條件下晶須長度為6-8μm,長徑比為130-270；此外,分散劑及分散劑種類不會對晶須的結(jié)構(gòu)及性質(zhì)造成影響,且添加分散劑后所合成的晶須依然具有優(yōu)良的高溫?zé)岱�(wěn)定性。以甲殼素和鹽酸為原料合成了甲殼素晶須,考察了鹽酸濃度、鹽酸體積、反應(yīng)時間對晶須產(chǎn)品的影響。通過對晶須產(chǎn)品的各表征說明：甲殼素質(zhì)量為1g、鹽酸濃度為3mol/L、鹽酸體積為30mL、反應(yīng)時間為1.5h-2h時合成的晶須形貌最理想,且晶須長度為400-500nm,直徑為20-30nm,長徑比為15-25。用聚乙烯醇對鈦酸鉀晶須進(jìn)行改性,再添加到甲殼素晶須膠體懸濁液中制膜,考察甲殼素晶須膜與復(fù)合晶須膜的拉伸性能。研究表明：添加鈦酸鉀晶須后的膜的拉伸性能較甲殼素晶須膜拉伸性能有明顯增強(qiáng),且添加量為3.0%時效果最明顯,拉伸強(qiáng)度為73.27MP,是甲殼素晶須膜的1.84倍。
[Abstract]:Potassium titanate whiskers have excellent heat resistance, high thermal stability and excellent mechanical properties. Chitin whiskers have strong adsorption and chelating properties, dispersion properties and so on. In this paper, two kinds of whiskers were studied systematically, and then the two whiskers were compounded to produce composite whiskers with high mechanical strength and good dispersion. The preparation and properties of the composite whiskers were studied preliminarily. Potassium titanate whiskers were synthesized from titanium dioxide and KOH under hydrothermal conditions. The effects of alkali concentration, molar ratio of potassium to titanium, reaction temperature and holding time on the synthesis of whiskers were investigated. The products were characterized by XRD and TEM. It was found that when the concentration of: Koh was 5 mol / L, the molar ratio of potassium to titanium was 20: 1, the reaction temperature was 300 鈩，

本文編號：1841337