HEC mo te horoi

Ko te HEC Hydroxyethyl cellulose he ma ki te kowhai kowhai he kiko, he paura totoka ranei. Kore-paitini, he reka. He ether cellulose nonionic, ka whakarewahia ki te wai makariri me te wai wera na te hydrophilic hydroxyethyl i roto i te ngota ngota. Ko tona wairewa wai he uara pH o 6.5 ~ 8.5 me te pumau ki te wera. He rereke te whakarewatanga o te HEC i runga i te tohu whakakapinga (DS). Karekau ki te nuinga o nga whakarewa pararopi. Kei a ia nga ahuatanga o te matotoru, te aukati, te adhesion, te emulsification, te whakamararatanga me te pupuri makuku, me etahi atu, ka taea e ia te whakarite otinga me nga awhe pokey rereke. He tino pai te tote ki te dielectric, a ko tana wairewa wai ka whakaaetia kia nui te kukū o te tote me te noho kore rereke.

Hydroxyethyl cellulose HEChanga rauemi mata

Ko nga rawa matua: Te cellulose o te taone (te maaka miro, te penupenu iti ranei), te kawakore wai, te ethylene oxide, te ethylene diron (40%)

Ko te punaha muka alkali he polymer maori, kei ia mowhiti muka e toru nga roopu hydroxyl, ko te tauhohenga hydroxyl tino kaha ki te hanga hydroxyethyl cellulose. Purihia te miro mata, te penupenu kai parakore ranei ki te 30% wai kawakore mo te hawhe haora ka pehia. Patupatua ki te 1: 2.8 nga wai kawakore, ka kuru. Ka makahia te cellulose alkali ki roto i te ketere tauhohenga, ka hiritia, ka whakakikoruatia, ka whakakiia ki te hauota, ka whakakiia ki te hauota hei whakakapi i te hau i roto i te keehi. I pehia te wai ethylene oxide i mua i te whakamatao ki roto i te koti reactor ki te wai whakamatao, a ka whakahaeretia te tauhohenga i te 25C mo te 2h ki te whiwhi hua masivesivá taura muka hydroxyethyl. Ko nga hua mawhero me te waipiro hei horoi, taapirihia te whakakore i te waikawa acetic ki te VLL 46, ka taapirihia e jean te hoholo whitiwhiti glyoxal. Katahi ka horoi ki te wai, whakamaroketanga centrifugal, whakamaroke, huri, hydroxyethyl cellulose.

1.1 wai alkali

Ko te hua parakore he wai marama kore tae. Kiato pātahi 2. 130, ira whakarewa 318.4C, ira koropu 1390C. Ko te houra caustic i runga i te maakete he ahua huringa. Me te wai e rua nga momo: parakore totoka houra caustic ma, tawerewere, poraka, kirikiri me te rakau ahua, cytoplasm: parakore wai houra caustic huaina wai alkali, wai marama kore tae. Kei roto i nga hua ahumahi nga poke, te nuinga o te konutai konutai me te konutai warowaiha, i etahi wa he iti te waikura rino.

1.2 ethylene oxide

Ko te Ethylene oxide he pūhui waro, tātai matū C2H40, he mate pukupuku paitini. Ko te kakaho epoxy he mura me te pahū, ehara i te mea ngawari ki te kawe i nga tawhiti tawhiti, na reira he kaha te rohe. Ka whakamahia nuitia i roto i te horoi, te rongoa, te ta me te tae o nga umanga. Ko te 3 oxyethane (E0) te etera mowhiti ngawari, no nga pūhui heterocyclic, he hua matū nui. Ko te Ethylene oxide he wai marama kore tae i te pāmahana iti me te hau karekau me te kakara o nga waewae i te pāmahana rūma. He teitei te pehanga kohu o te hau, ka eke ki te 141kPa i te 30C. Ko tenei pehanga kohu teitei ka whakatau i te kuhu kaha o te epoxy z.alkane i te wa e koromamao ana. Ira whakarewa (C): -112.2. Kiato whanaunga (wai -1) : 0.8711

1.3 glyoxal

He kowhai kowhai, he pahekeheke ranei, ka ma i te whakamataotanga.

Hydroxyethyl celluloseHangahanga HECtukanga

Whakanohoiate miro matua, te penupenu parakore ranei i roto i te 30% rei. Tangohia ka pehia. Ka tukitukia, ka tauhohehia ki te waikura ethylene i mua i te whakamatao ki te whakaputa i te waikura hydroxyethyl cellulose. Na ka horoi ki te waipiro me te taapiri i te waikawa acetic hei horoi me te whakakore. Kātahi ka tāpirihia te glyoxal crosslinking aging, horoi tere ki te wai. Ka mutu, i muri i te whakamaroketanga o te centrifugation, te whakamaroke me te huri, ka otiHECka whiwhi hua.

He tikanga mo te whakaputa pungarehu itiHECKo te hydroxyethyl cellulose ma te horoi horoi tonu no te waahanga hangarau o nga rawa. Ko te raruraru hangarau hei whakaoti ko te whakarato i te tukanga horoi tonu me te kaha o te whakaputa, te iti o te ngaro o te horoi horoi me nga rauemi me te utu iti hei whakaputa i te pungarehu iti.HEChydroxyethyl cellulose. Ko te tikanga o te mahi horoi tonu hei whakaputa i te pungarehu itiHECKo te hydroxyethyl cellulose e tohuhia ana i roto i nga waahanga e whai ake nei: A, te makuku hydroxyethyl cellulose me te kaihoko whakawhiti i konatunatua, te maimoatanga whakawhiti ki te tiki slurry A; B. Taapirihia te wairewa horoi ki te slurry A i riro mai i te taahiraa A ki te tiki slurry B; C. Taapirihia te slurry C kua riro mai i te taahiraa B ki roto i te centrifuge pehanga hurihuri ka whiwhi iti te pungarehu hydroxyethyl cellulose i muri i te horoi tonu. Ka taea e te tikanga te whakapai ake i te kaha o te mahi, te whakapai ake i te ngaro o te horoi horoi me nga taonga, me te tino whakaiti i te ihirangi pungarehu o te hua, e tika ana mo te rongonui me te tono.