哈尔滨工程大学学报
哈爾濱工程大學學報
합이빈공정대학학보
JOURNAL OF HARBIN ENGINEERING UNIVERSITY
2015年
4期
592-594
,共3页
纳米氧化硅粒子%紫外光谱%吸附特性%高固含量悬浮液%体积浓度%聚乙二醇
納米氧化硅粒子%紫外光譜%吸附特性%高固含量懸浮液%體積濃度%聚乙二醇
납미양화규입자%자외광보%흡부특성%고고함량현부액%체적농도%취을이순
silica nanoparticles%UV-Vis spectra%adsorption properties%suspension with high solid content%volume fraction%polyethylene glycol ( PEG)
为了研究高固含量悬浮液制备中稀释液的选配及影响，利用紫外－可见分光光度计研究了纳米SiO2在两相与三相悬浮液中的光学特性，并通过对悬浮液吸光度的分析，研究了纳米SiO2对PEG（200）的吸附特性随体积浓度与制备工艺的变化。结果发现，SiO2／PEG悬浮体系对220～300 nm 的紫外光有强烈的吸收；随着乙醇的加入，吸收峰展宽至400 nm，同时对400～800 nm的可见光也有一定吸收作用。以SiO2／PEG悬浮体系的吸收峰为参照，体积浓度低时，三相体系中的SiO2粒子对PEG的吸附受乙醇加入工艺的影响显著；随着SiO2粒子体积浓度的升高，SiO2粒子对PEG的吸附受乙醇加入工艺的影响明显趋弱。经过旋转蒸发后，3种工艺的SiO2／PEG的吸收峰强度位置变化不大，说明乙醇对SiO2粒子吸附特性的影响是可逆的，其他吸收峰的存在说明有一定量的残留乙醇。
為瞭研究高固含量懸浮液製備中稀釋液的選配及影響，利用紫外－可見分光光度計研究瞭納米SiO2在兩相與三相懸浮液中的光學特性，併通過對懸浮液吸光度的分析，研究瞭納米SiO2對PEG（200）的吸附特性隨體積濃度與製備工藝的變化。結果髮現，SiO2／PEG懸浮體繫對220～300 nm 的紫外光有彊烈的吸收；隨著乙醇的加入，吸收峰展寬至400 nm，同時對400～800 nm的可見光也有一定吸收作用。以SiO2／PEG懸浮體繫的吸收峰為參照，體積濃度低時，三相體繫中的SiO2粒子對PEG的吸附受乙醇加入工藝的影響顯著；隨著SiO2粒子體積濃度的升高，SiO2粒子對PEG的吸附受乙醇加入工藝的影響明顯趨弱。經過鏇轉蒸髮後，3種工藝的SiO2／PEG的吸收峰彊度位置變化不大，說明乙醇對SiO2粒子吸附特性的影響是可逆的，其他吸收峰的存在說明有一定量的殘留乙醇。
위료연구고고함량현부액제비중희석액적선배급영향，이용자외－가견분광광도계연구료납미SiO2재량상여삼상현부액중적광학특성，병통과대현부액흡광도적분석，연구료납미SiO2대PEG（200）적흡부특성수체적농도여제비공예적변화。결과발현，SiO2／PEG현부체계대220～300 nm 적자외광유강렬적흡수；수착을순적가입，흡수봉전관지400 nm，동시대400～800 nm적가견광야유일정흡수작용。이SiO2／PEG현부체계적흡수봉위삼조，체적농도저시，삼상체계중적SiO2입자대PEG적흡부수을순가입공예적영향현저；수착SiO2입자체적농도적승고，SiO2입자대PEG적흡부수을순가입공예적영향명현추약。경과선전증발후，3충공예적SiO2／PEG적흡수봉강도위치변화불대，설명을순대SiO2입자흡부특성적영향시가역적，기타흡수봉적존재설명유일정량적잔류을순。
In order to study diluent selection and influence in preparation of suspensions with high solid content, the absorbance properties of silica nanoparticles in two-phase and three-phase suspensions were studied using the ultra-violet-visible spectrophotometer.The change of adsorption properties of PEG200 on silica surface with different vol-ume fractions and preparation procedures was analyzed based on suspension absorbance.The results showed that there is considerable ultraviolet absorption from 220 to 300 nm for SiO2 /PEG suspension system.The addition of ethanol, the absorption band is broadened to 400 nm and the strengthened absorption of suspensions in the visible light district from 400 to 800 nm is exhibited.Referring to absorption band of SiO2/PEG, while particle volume fraction is low, ethanol pre-addition significantly decreases the adsorption degree of PEG on SiO2 surface.When the particle volume fraction becomes higher, ethanol pre-addition only slightly decreases the adsorption degree of PEG on SiO2 surface.After rotary evaporation, the absorption bands of three processes change little, indicating that the effect of ethanol on surface absorption properties of SiO2 nanoparticles can be reversible.The existence of other ab-sorption bands shows the residue of ethanol.
