Hydroxyethyl cellulosehe pärönaki cellulose nui. Na nga painga o te maha o nga rauemi mata, ka taea te whakahou, te koiora, te kore-paitini, te pai o te pai o te koiora, me te nui o nga hua, ko tana rangahau me te tono kua tino arohia. . Ko te uara pokey he tohu mahi tino nui o te hydroxyethyl cellulose. I roto i tenei pepa, ko te hydroxyethyl cellulose me te uara viscosity i runga ake i te 5×104mPa·s me te uara pungarehu iti iho i te 0.3% i whakaritea e te tikanga whakahiato-wai-waahanga na roto i te whakamaaramatanga me te etherification e rua-taahiraa tukanga.
Ko te tukanga alkaliization ko te tukanga whakarite o te cellulose alkali. I roto i tenei pepa, e rua nga tikanga whakamaaramatanga. Ko te tikanga tuatahi ko te whakamahi i te acetone hei waimeha. Ko te rauemi mata o te cellulose he mea hanga tika ki tetahi kukū o te konutai waiwai wairewa wai. I muri i te whakahaerenga o te tauhohenga whakamaarama, ka taapirihia he kaihoko whakakoi hei kawe tika i te tauhohenga whakamaarama. Ko te tikanga tuarua ko te kawakore o te cellulose raw rauemi i roto i te wairewa wai o te konutai waiwaro me te Urea, a ko te cellulose kawakore kua oti te whakarite ma tenei tikanga me ruia ki te tango i te rei i mua i te tauhohenga etherification. Ko te cellulose alkali i mahia e nga tikanga rereke i tātarihia e te spectroscopy infrared me te diffraction X-ray. E ai ki nga ahuatanga o nga hua kua whakaritea e te tauhohenga etherification, ka whakatauhia te tikanga whiriwhiri.
Hei whakatau i te tino pai o te tukanga whakahiato whakaetere, ka tātarihia te tikanga tauhohenga o te antioxidant, te rei me te waikawa acetic glacial i roto i te tauhohenga etherification i te tuatahi. Na ka whakatakoto i te hotaka whakamatautau o te tauhohenga tauwehe kotahi, ka whakatau i nga mea e pa ana ki te mahi o te hydroxyethyl cellulose kua rite, me te whakamahi i te pokey o te wairewa wai 2% o te hua hei tohu tohutoro. Ko nga hua whakamatautau e whakaatu ana ko nga mea penei i te nui o te waimeha kua tohua, te nui o te ethylene oxide i tapirihia, te wa whakamaaramatanga, te pāmahana me te wa o te tauhohenga tuatahi, te pāmahana me te wa o te tauhohenga tuarua ka whai mana nui ki te mahi o te hua. I tuhia he kaupapa whakamatautau orthogonal me nga mea e whitu me nga taumata e toru, a ka taea e te anau paanga i tangohia mai i nga hua whakamatautau ka taea te tātari kanohi i nga mea tuatahi me nga mea tuarua me te ia awe o ia take. Hei whakarite i nga hua me nga uara pokey teitei ake, i hangaia he kaupapa whakamatautau tino pai, a ko te kaupapa tino pai mo te whakarite hydroxyethyl cellulose i whakatauhia ma nga hua whakamatautau.
Ko nga ahuatanga o te riipene teitei kua ritehydroxyethyl cellulosei tātarihia, i whakamatauria hoki, tae atu ki te whakatau i te pokey, te ihirangi pungarehu, te whakawhiti marama, te makuku, me era atu, na roto i te spectroscopy infrared, resonance autō karihi, chromatography hau, X-ray diffraction, Thermogravimetric-differential thermal analysis and other characterization method are used to analysis and characterization the product structure, molari substituent etc. Ko nga tikanga whakamatautau e pa ana ki nga paerewa ASTM.
Ko te Hydroxyethyl cellulose, he huanga nui o te cellulose, kua aro mai na te nui o nga rawa o te mata, ka taea te whakahou, te whakaheke koiora, te kore paitini, te hototahi koiora, me te nui o te hua. Ko te viscosity o te hydroxyethyl cellulose he tohu tino nui mo tana mahi. Ko te viscosity o te hydroxyethyl cellulose kua rite kei runga ake i te 5×104mPa·s, a ko te ihirangi pungarehu he iti iho i te 0.3%.
I roto i tenei pepa, i whakaritea te hydroxyethyl cellulose teitei-nui ma te tikanga whakahiato-waahanga wai ma te whakamaarama me te whakaea. Ko te tukanga alkaliization ko te whakarite o te cellulose alkali. Kōwhiria mai i ngā tikanga whakahāhā e rua. Ko tetahi ko te mea he mea kawakore te rauemi cellulose ki te acetone hei waimeha i roto i te wairewa konutai konutai wai, katahi ka uru ki te tauhohenga whakaetere me tetahi kaihoko whakaetere. Ko tetahi atu ko nga mea cellulosic ka kawakawahia i roto i te wairewa konutai konutai wai me te Urea. Ko te taikaha kawakore i roto i te cellulose alkali me tango i mua i te tauhohenga. I roto i tenei pepa, he maha nga momo cellulose alkali e akohia ana e te whaanui infrared me te rereketanga o te hihi X. Ka mutu, ko te tikanga tuarua ka whakamahia i runga i nga ahuatanga o nga hua whakaea.
Hei whakatau i nga takahanga o te etherification, i akohia te tikanga tauhohenga o te antioxidant, alkali me te waikawa acetic glacial i roto i te tukanga o te kai. Ko nga mea e pa ana ki te whakarite o te hydroxyethyl cellulose i whakatauhia e te whakamatautau tauwehe kotahi. I runga i te uara viscosity o te hua i roto i te wairewa wai 2%. Ko nga hua whakamatautau e whakaatu ana ko te nui o te waimeha, te nui o te ethylene oxide, te wa whakamaarama, te pāmahana me te wa o te rehydration tuatahi me te tuarua ka whai mana nui ki te mahi hua. Ko te tikanga o nga mea e whitu me nga taumata e toru i tangohia hei whakatau i te tikanga whakarite pai.
Ka tātarihia e matou nga ahuatanga o te mea kua oti te whakaritehydroxyethyl cellulose, tae atu ki te viscosity, te pungarehu, te whakawhiti marama, te makuku, me etahi atu. Ko te ahuatanga o te hanganga, te whakakotahitanga whakakapi, te molarity whakakapi, te tioata me te pumau waiariki i korerohia e te infrared, te resonance autō karihi, te chromatography hau, te rereketanga X-ray, te DSC me te DAT, me nga tikanga whakamatautau i tangohia nga paerewa ASTM.
Te wa tuku: Apr-25-2024