Carboxymethyl cellulose:
Katoteether cellulosehe mea hanga mai i nga muka maori (katunu, me etahi atu) i muri i te maimoatanga kawakore, ma te whakamahi i te konutai monochloroacetate hei kaihoko etherification, me te whai i te raupapa o nga maimoatanga tauhohenga. Ko te tohu o te whakakapi i te nuinga o te 0.4 ~ 1.4, a ko tana mahi ka tino pa ki te tohu o te whakakapi.
(1) Ko te Carboxymethyl cellulose he hygroscopic ake, a ka nui ake te wai ina rongoa i raro i nga tikanga whanui.
(2) Ko te wairewa wai Carboxymethyl cellulose e kore e whakaputa i te ra, ka heke te pokey ki te piki o te pāmahana. Ka nui ake te mahana ki te 50°C, kare e taea te huri te pokey.
(3) Ko tona pumau ka tino pa ki te PH. Ko te tikanga, ka taea te whakamahi i roto i te kumete i runga i te gypsum, engari kaua i roto i te kumete-sima. Ka tino kawakore, ka ngaro te pokey.
(4) He iti ake te pupuri wai i to te methyl cellulose. He awenga whakamuri i runga i te kumete i runga i te gypsum me te whakaheke i tona kaha. Engari, he iti rawa te utu o te carboxymethyl cellulose i to te methyl cellulose.
Cellulose alkyl ether:
Ko etahi o nga mema ko te methyl cellulose me te ethyl cellulose. I roto i nga mahi ahumahi, ko te methyl chloride, te ethyl chloride ranei te nuinga o te whakamahi hei kaihoko whakamaarama, a ko te tauhohenga e whai ake nei:
I roto i te tātai, ko R te tohu CH3, C2H5 ranei. Ko te kukū o te alkali e kore noa e pa ki te tohu o te etherification, engari ka pa ano ki te kohi o nga alkyl halides. Ko te iti o te kukū kawakore, ka kaha ake te hauwai o te alkyl halide. Hei whakaiti i te kohi o te kaihoko etherifying, me whakanui ake te kukū alkali. Engari, i te mea he tiketike rawa te kukū o te alkali, ka whakahekehia te hua pupuhi o te cellulose, kaore i te pai ki te tauhohenga etherification, na reira ka heke iho te tohu o te etherification. Mo tenei kaupapa, ka taea te taapiri i te rei me te rei toka i te wa o te tauhohenga. Me pai te whakakorikori me te haea o te reactor kia pai ai te tohatoha o te alkali.
Ko te Methyl cellulose e whakamahia nuitia ana hei whakamaroke, hei whakapiri me te colloid tiaki me etahi atu. Ka taea hoki te whakamahi hei whakamarara mo te polymerization whakaehunga, he dispersant here mo nga kakano, he slurry pueru, he taapiri mo te kai me nga mea whakapaipai, he whakapiri rongoa, he taonga paninga tarukino, mo te peita taherapa ki roto i te waituhi whakangao me te whakauru i te waituhi ceramic. kaha, etc.
Ko nga hua o te Ethyl cellulose he kaha miihini teitei, he ngawari, he parenga wera me te aukati makariri. He wairewa te ethyl cellulose iti-whakakapi ki te wai me te waimeha wairewa kawakore, me nga hua whakakapi-nui ka memeha i roto i te nuinga o nga whakarewa pararopi. He pai te hototahitanga ki nga momo kapia me nga raima. Ka taea te whakamahi ki te hanga kirihou, kiriata, varnishes, adhesives, latex me te paninga rauemi mo te raau taero, etc.
Ko te whakaurunga o nga roopu hydroxyalkyl ki roto i nga cellulose alkyl ethers ka taea te whakapai ake i tona whakarewatanga, te whakaiti i te aro ki te tote, te whakanui ake i te pāmahana wairewa me te whakapai ake i nga ahuatanga whakarewa wera, me era atu.
Cellulose hydroxyalkyl ether:
Ko etahi o nga kanohi ko te hydroxyethyl cellulose me te hydroxypropyl cellulose. Ko nga mea whakakoi he epoxide penei i te ethylene oxide me te propylene oxide. Whakamahia te waikawa, te turanga ranei hei whakakorikori. Ko te hanga Ahumahi ko te tauhohe i te cellulose alkali me te kaihoko etherification: hydroxyethyl cellulose me te uara whakakapinga teitei he wairewa i roto i te wai matao me te wai wera. Ko te Hydroxypropyl cellulose he nui te uara whakakapi ka whakarewahia ki te wai matao engari kaua ki te wai wera. Ka taea te whakamahi Hydroxyethyl cellulose hei whakakao mo nga paninga taherapa, te ta kakano me te whakapiri waikano, nga rauemi rahi pepa, te whakapiri me nga colloids whakamarumaru. Ko te whakamahinga o te hydroxypropyl cellulose he rite ki tera o te hydroxyethyl cellulose. Ko te Hydroxypropyl cellulose me te iti o te uara whakakapi ka taea te whakamahi hei rongoa rongoa, ka taea te here me te pakaru.
Carboxymethylcellulose, whakapoto heiCMC, te tikanga kei te ahua o te tote konutai. He waikawa monochloroacetic te kaikawe, a ko te tauhohenga e whai ake nei:
Ko te Carboxymethyl cellulose te ether cellulose wairewa-wairewa e tino whakamahia ana. I nga wa o mua, ko te nuinga o te waa i whakamahia hei paru keri, engari inaianei kua whakawhānuihia hei taapiri mo te hopii, te slurry kakahu, te peita taherapa, te paninga o te kaata me te pepa, me etahi atu.
Ko te polyanionic cellulose (PAC) he katoteether cellulosehe hua whakakapi teitei mo te carboxymethyl cellulose (CMC). He paura ma, he ma-ma, he kowhai iti ranei, he kirikiri ranei, he kore-paitini, he reka, he ngawari ki te wairewa i roto i te wai, ka hanga he otinga maramara me tetahi pokey, he pai ake te pumau o te wera me te tote, me nga taonga antibacterial kaha. Kaore he koriri me te paheketanga. Kei a ia nga ahuatanga o te parakore teitei, teitei o te whakakapinga, me te tohatoha rite o nga whakakapi. Ka taea te whakamahi hei kaapiri, hei whakakaha, hei whakarereke i te rheology, hei whakaheke i te wai, hei whakapumau i te aukati, me etahi atu. Ko te polyanionic cellulose (PAC) e whakamahia whanuitia ana i roto i nga umanga katoa ka taea te tono CMC, ka taea te whakaiti i te inenga, te ngawari ki te whakamahi, te pai ake o te pumau me te whakatutuki i nga whakaritenga tukanga teitei ake.
Ko te Cyanoethyl cellulose te hua tauhohenga o te cellulose me te acrylonitrile i raro i te catalysis o te kawakore:
Ko te Cyanoethyl cellulose he taumau dielectric teitei me te iti o te whakarea mate ka taea te whakamahi hei matrix kapia mo nga rama phosphor me te electroluminescent. Ka taea te whakamahi i te cyanoethyl cellulose iti-whakakapi hei pepa whakamarumaru mo nga huringa.
Ko nga etera waipiro ngako teitei ake, nga alkenyl ethers, me nga eter waipiro kakara o te cellulose kua whakaritea, engari kaore i whakamahia i roto i nga mahi.
Ko nga tikanga whakarite o te cellulose ether ka taea te wehewehe ki roto i te tikanga wai, tikanga whakarewa, tikanga pokepoke, tikanga slurry, tikanga hau-totoka, tikanga wahanga wai me te whakakotahitanga o nga tikanga o runga.
Te wa tuku: Apr-28-2024