1.Tirohanga:
Ko te cellulose ether he puhui polymer maori, ko tona hanganga matū he macromolecule polysaccharide i runga i te β-glucose anhydrous, a he kotahi te roopu hydroxyl tuatahi me nga roopu hydroxyl tuarua e rua i runga i ia mowhiti turanga. Na roto i te whakarerekētanga matū, ka taea te whiwhi i te raupapa o te cellulose derivatives, ko te cellulose ether tetahi o ratou. Cellulose ether he pūhui polymer me te hanganga ether i hangaia ki te cellulose, penei i te methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, me etahi atu. , propylene oxide, waikawa monochloroacetic ranei.
2. Mahinga me nga ahuatanga:
(1) Nga ahuatanga o te ahua
Ko te cellulose ether te tikanga he ma, he miraka ranei te ma, he kore kakara, he paitini kore, he paura kirikiri wai, he ngawari ki te mimiti makuku, ka memeha ki roto i te koloidu pukoro puhoi i roto i te wai.
(2) Te hanga kiriata me te piri
He nui te awe o te etherification o te cellulose ether ki ona ahuatanga me te mahi, penei i te whakarewatanga, te kaha o te hanga kiriata, te kaha here me te aukati tote. Ko te Ether Cellulose he nui te kaha o te miihini, te ngawari, te wera wera me te aukati makariri, he pai te hototahi ki nga momo kapia me nga raima, ka taea te whakamahi ki te hanga kirihou, kiriata, waituhi, whakapiri, latex me nga taonga paninga Drug, etc.
(3) Wairewa
Ko te Methylcellulose he wairewa i roto i te wai matao, he koretake i roto i te wai wera, he wairewa ano hoki ki etahi whakarewa waro; Ko te methyl hydroxyethyl cellulose he wairewa i roto i te wai matao, karekau i roto i te wai wera me nga whakarewa pararopi. Heoi, ka whakamahana te wairewa wai o te methylcellulose me te methylhydroxyethylcellulose, ka heke te methylcellulose me te methylhydroxyethylcellulose. Methylcellulose precipitates i 45-60°C, ia piki te pāmahana rerenga o te methyl hydroxyethyl cellulose whakauru etherified ki te 65-80°C. Ka whakahekehia te pāmahana, ka rewa ano te rerenga. Hydroxyethyl cellulose me te konutai carboxymethyl hydroxyethyl cellulose he wairewa i roto i te wai ahakoa te pāmahana me te kore e rewa i roto i nga whakarewa waro.
(4) te matotoru
Ka memeha ki roto i te wai i roto i te ahua colloidal, ka whakawhirinaki tona pokey ki te tohu o te polymerization o te cellulose ether. Kei roto i te otinga nga macromolecules hydrated. Na te weriweri o te macromolecules, he rereke te rere o nga otinga ki tera o nga wai o Newtonian, engari ka whakaatu i te whanonga ka huri i nga huringa o te kaha kutikuti. Na te hanganga macromolecular o te cellulose ether, ka tere te piki o te pokey o te otinga ki te piki o te kukū me te heke tere i te pikinga o te pāmahana.
Taupānga
(1) Te ahumahi hinu
Ko te konutai carboxymethyl cellulose te nuinga e whakamahia ana i roto i te tangohanga hinu, a ka whakamahia i roto i te hanga o te paru ki te whakanui ake i te viscosity me te whakaiti i te mate wai. Ka taea e ia te aukati i nga momo parahanga tote whakarewa me te whakanui ake i te whakaora hinu. Ko te konutai carboxymethyl hydroxypropyl cellulose (NaCMHPC) me te konutai carboxymethyl hydroxyethyl cellulose (NaCMHEC) he pai nga matū maimoatanga paru keri me nga rauemi mo te whakarite i nga wai oti, me te tere o te slurrying me te tote, He pai te mahi anti-calcium, te kaha ki te whakanui ake i te kaha, te kaha o te wera. (160 ℃) āhuatanga. He pai mo te whakarite wai keri mo te wai hou, te wai moana me te wai tote kukū. Ka taea te hanga ki roto i nga wai keri o nga momo kiato (103-127g/cm3) i raro i te taumaha o te konupūmā pūhaumāota, a he tino pokey me te iti o te mate o te wai, he pai ake i te hydroxyethyl cellulose tona kaha ki te whakanui ake i te kaha me te whakaheke i te wai. , a he taapiri pai mo te whakanui ake i te whakaputa hinu.
Ko te konutai carboxymethyl cellulose he pärönaki cellulose e whakamahia nuitia ana i roto i te mahi tango hinu. Ka whakamahia i roto i te keri wai, te wai cimenting, te wai pakaru me te whakapai ake i te whakaora hinu, ina koa ki te keri wai. Ko te nuinga ka whai waahi ki te whakaiti i te mate o te wai me te whakanui ake i te pokey. Ko te Hydroxyethyl cellulose (HEC) e whakamahia ana hei whakamarumaru paru me te whakapumau i roto i te mahi keri, te whakaoti pai me te raima. Ka whakatauritea ki te konutai carboxymethyl cellulose me te kapia guar, he pai te whakamaaru o te hydroxyethyl cellulose, he kaha te whakatārewatanga o te onepu, te kaha o te tote, te pai o te wera, te iti o te whakakotahitanga, te iti o te mate wai, me te pakaru o te ra. Poraka, toenga iti me etahi atu ahuatanga, kua whakamahia nuitia.
(2) Te hanga me te ahumahi peita
Ko te konutai carboxymethyl cellulose ka taea te whakamahi hei retarder, hei pupuri i te wai, hei whakakaha me te here mo te hanga i te masonry me te raima moata whakauru, a ka taea te whakamahi hei raima, moata me te papa o te whenua mo te turanga gypsum me te turanga sima Ka whakamahia hei dispersant, wai. te kaikawe pupuri me te kaitao. He whakaurunga masonry motuhake me te raima moata i hangaia mai i te carboxymethyl cellulose, ka taea te whakapai ake i te mahi, te pupuri wai me te aukati kapiti o te moata, me te karo i te pakaru me te kore i roto i te pakitara poraka. pahū. Ko nga taonga whakapaipai mata hangahanga a Cao Mingqian me etahi atu i hangaia he taonga whakapaipai mo te mata o te whare mai i te methyl cellulose. He ngawari, he ma te tukanga whakaputa. Ka taea te whakamahi mo te pakitara teitei me nga papa kohatu, ka taea hoki te whakamahi mo te whakapaipai mata o nga pou me nga tohu.
(3) Te ahumahi matū o ia ra
Ko te viscosifier konutai carboxymethyl cellulose whakapumau te mahi o te whakamararatanga me te whakapumautanga whakatārewatanga i roto i nga hua whakapiri o te paura totoka rauemi mata, a ka whai waahi ki te whakapakeke, te whakamarara me te whakakotahi i roto i te wai whakaehunga ranei. Ka taea te whakamahi hei whakapumau me te tackifier. Ka whakamahia nga whakaehunga whakaehunga hei whakaemulsifiers, hei whakakaha me te whakapumau mo te hinu me te shampoos.Konutai carboxymethyl hydroxypropyl celluloseka taea te whakamahi hei whakapumau mo nga whakapiri niho. He pai nga ahuatanga thixotropic, e pai ai te toothpaste i roto i te ahua, te rokiroki mo te wa roa kaore he rerekee, me te reka o te ahua me te reka. Ko te konutai carboxymethyl hydroxypropyl cellulose he pai ake te parenga tote me te aukati waikawa, a he pai rawa atu tona paanga ki tera o te carboxymethyl cellulose. Ka taea te whakamahi hei whakamarumaru i roto i nga hopi horoi me te kaihoko anti-stain. Ko te whakamaarama whakamararatanga i roto i te hanga o nga mea horoi, ko te konutai carboxymethylcellulose te nuinga o te waa ka whakamahia hei whakamarara paru mo te horoi i te paura, te whakamaarama me te whakamararatanga mo nga wai horoi.
(4) Te rongoa me te ahumahi kai
I roto i te ahumahi ho'oraa, ka taea te whakamahi hydroxypropyl carboxymethylcellulose (HPMC) hei rongoa rongoa, e whakamahia nuitia ana i roto i te matrix matrix a-waha e whakahaeretia ana me te whakareri tuku pumau, hei taonga whakaroa hei whakahaere i te tukunga o nga raau taero, hei taonga whakakikorua ki te whakaroa i te Tuku. nga hanganga, nga pire tuku-roa, nga kapene tuku-roa. Ko nga mea e whakamahia nuitia ana ko te methyl carboxymethyl cellulose me te ethyl carboxymethyl cellulose, penei i te MC, ka whakamahia hei hanga papa me nga kapene, hei whakakakahu ranei i nga papa kua pania ki te huka. Ka taea te whakamahi i nga ethers cellulose utu nui i roto i te umanga kai, he mea whakakoi, he whakapumau, he awhina, hei pupuri i te wai me nga miihini hukahuka i roto i nga momo kai. Ko te Methyl cellulose me te hydroxypropyl methyl cellulose kua mohiohia he matū kore-a-tinana-a-tinana. Ko te parakore teitei (kei runga ake i te 99.5%) ka taea te taapiri i te carboxymethylcellulose (CMC) ki te kai, penei i te miraka me nga hua kirīmi, nga mea kakara, te tiihi, te tiēre, te kai kēne, te tirikara tepu me nga inu. Ko te Carboxymethyl cellulose me te ma o neke atu i te 90% ka taea te whakamahi i nga waahanga e pa ana ki te kai, penei i te kawe me te rokiroki o nga hua hou. Ko tenei momo takai kirihou nga painga o te pai o te pupuri hou, te iti o te parahanga, te kore kino, me te hanga miihini ngawari.
(5) Ko nga mea mahi oro me te hiko
Electrolyte thickening stabilizer he parakore tiketike o te cellulose ether, pai ātete waikawa me te tote ātete, rawa iti rino me te ihirangi konganuku taimaha, na he tino pūmau te colloid, e tika ana mō te pākahiko kawakore, pākahiko konutea-konupora Electrolyte thickening stabilizer. He maha nga etera cellulose e whakaatu ana i te tioata wai werawera. Ko te Hydroxypropyl cellulose acetate ka hanga i nga tioata wai cholesteric thermotropic i raro i te 164°C.
Te wa tuku: Hanuere-12-2023