Ko te Carboxymethyl cellulose (CMC) ka whiwhi i muri i te carboxymethylation o te cellulose. Ko tana otinga wai ko nga mahi o te matotoru, te hanga kiriata, te honohono, te pupuri i te wai, te whakamarumaru colloid, te emulsification me te whakatārewatanga, a ka whakamahia nuitia i roto i te hinu, te kai, te rongoa, me era atu, te kakano me te ahumahi pepa, ko tetahi o nga mea tino nui. cellulose ethers.Natural cellulose ko te polysaccharide tino whanui me te tino nui i roto i te taiao, a he tino taonga ona puna. Ko te hangarau whakarereke o naianei o te cellulose e aro nui ana ki te etherification me te esterification. Ko te Carboxymethylation he momo hangarau etherification.
āhuatanga kikokiko
Ko te konutai carboxymethyl cellulose (CMC) he etera cellulose anionic, he ma, he paku kowhai ranei te paura muka, he paura ma ranei te ahua, he kakara, he kore reka, he paitini; he ngawari te wairewa i roto i te wai matao, i te wai wera ranei, ka hanga he otinga maamaa maamaa. He kūpapa, he paku kawakore ranei te otinga, karekau e rewa ki te waiwaro, etera, isopropanol, acetone me etahi atu whakarewa pararopi, ka whakarewahia i roto i te 60% wai-wairewa wairewa acetone ranei. He hygroscopic, he pumau ki te marama me te wera, ka heke te pokey me te piki ake o te pāmahana, ka mau te otinga ki te pH 2-10, he iti ake te pH i te 2, he ua totoka, ka heke te pokey ina teitei ake te pH i te 10 Ko te 227 ℃ te pāmahana whakapokao, ko te 252 ℃ te wera o te warowaihā, a ko te mata o te 2% wairewa wai. 71mn/n.
āhuatanga matū
He mea whakarite mai i nga hua o te cellulose o nga whakakapi carboxymethyl, te rongoa i te cellulose me te konutai waikawa hei hanga i te cellulose alkali, katahi ka tauhohe ki te waikawa monochloroacetic. E toru nga roopu hydroxyl i roto i te wae huka e hanga ana i te cellulose ka taea te whakakapi, na reira ka taea te whiwhi i nga hua he rereke nga tohu whakakapinga. I te toharite, 1 mmol o te carboxymethyl i whakauruhia mo ia 1 g o te taumaha maroke, he kore e rewa i roto i te wai me te waikawa dilute, engari ka taea te pupuhi me te whakamahi mo te chromatography whakawhiti katote. Ko te Carboxymethyl pKa he 4 i roto i te wai parakore me te 3.5 i te 0.5mol/L NaCl. He kaiwhakawhitinga ngongo waikawa ngoikore me te nuinga o te waa ka whakamahia mo te wehenga o nga pūmua kore me te taketake i te pH>4. Neke atu i te 40% o nga roopu hydroxyl ka whakakapihia e nga roopu carboxymethyl, ka taea te rewa ki roto i te wai hei hanga i te otinga colloidal-nui-nui.
Ko te kaupapa matua
Ko te Carboxymethyl cellulose (CMC) he paura karekau he paitini me te hongi kore he ma, he pai te mahi, he ngawari te wairewa ki te wai. Ko tana wairewa he wai kawakore, kawakore ranei, he wai maataata, he wairewa i roto i etahi atu kapia wairewa me nga kapia, he koretake. i roto i nga whakarewa waro penei i te waihano. Ka taea te whakamahi i te CMC hei whakapiri, hei whakamaroke, hei kaiwhakarewa, emulsifier, dispersant, stabilizer, te kaihoko rahi, etc.
Ko te konutai carboxymethyl cellulose (CMC) te hua me te whakaputanga nui rawa atu, te tino whakamahia me te tino watea i waenga i nga ethers cellulose, e mohiotia ana ko "monosodium glutamate ahumahi".
1. Ka whakamahia mo te keri hinu me te hau maori, te keri pai me etahi atu kaupapa
① Ka taea e te paru kei roto te CMC te hanga i te pakitara puna hei keke tātari angiangi, pakari hoki me te iti o te uruhanga, ka iti te mate wai.
② Whai muri i te whakaurunga o te CMC ki te paru, ka taea e te keri keri he iti te kaha kutikuti tuatahi, kia ngawari ai te tuku o te paru i te hau i takai ki roto, i te wa ano, ka tere te maka o nga otaota ki roto i te rua paru.
③Ko te paru keri, pera i era atu whakamararatanga whakatārewatanga, he wa roa te noho, me te taapiri o te CMC ka taea te pumau me te whakaroa i te waa noho.
④ Ko te paru kei roto i te CMC kare e pangia e te pokepokea ai, no reira kaore e tika kia mau tonu te uara pH teitei me te whakamahi i nga rongoa.
⑤ Kei roto ko te CMC hei kaikawe maimoatanga wai horoi paru keri, ka taea te aukati i te poke o nga momo tai wairewa.
⑥ He pai te noho o te paru kei roto CMC me te whakaiti i te mate wai ahakoa kei runga ake i te 150 ℃ te pāmahana.
Ko te CMC me te nui o te pokey me te nui o te whakakapinga he pai mo te paru me te iti o te kiato, a ko te CMC me te iti o te pokey me te nui o te whakakapi he pai mo te paru me te nui o te kaha. Ko te kowhiringa o te CMC me whakatau i runga i nga ahuatanga rereke penei i te momo paru, rohe me te hohonutanga pai.
2. Ka whakamahia i roto i te ahumahi kakano, te ta me te tae. Ko te ahumahi kakano e whakamahi ana i te CMC hei kaihoko rahi mo te rahinga miro marama o te miro, te huruhuru hiraka, te muka matū, te whakakotahi me etahi atu mea kaha;
3. Whakamahia i roto i te ahumahi pepa Ka taea te whakamahi CMC hei kaihoko whakaene mata pepa me te kaihoko rahi i roto i te ahumahi pepa. Ko te taapiri i te 0.1% ki te 0.3% CMC ki te penupenu ka taea te whakanui i te kaha o te pepa ki te 40% ki te 50%, te whakanui ake i te pakaru o te kopiri ki te 50%, me te whakanui ake i te kaha o te kneadability i te 4 ki te 5 wa.
4. Ka taea te whakamahi i te CMC hei whakangao paru ina tapirihia ki nga hopii waihanga; Ko nga matū o ia ra penei i te ahumahi toothpaste CMC glycerin wairewa wai ka whakamahia hei turanga kapia mo te toothpaste; whakamahia te ahumahi ho'oraa rite te thickener me emulsifier; Ko te wairewa wai CMC ka whakapakeke ka whakamahia mo te tukatuka kohuke rewa, aha atu.
5. I roto i te ahumahi uku, ka taea te whakamahi hei whakapiri, te kirihou, te kaitautoko mo te karaehe, te kaihoko whakatika tae, me etahi atu.
6. Ka whakamahia ki te hanga hei whakapai ake i te pupuri wai me te kaha
7. Ka whakamahia i roto i te ahumahi kai. Ko te ahumahi kai e whakamahi ana i te CMC me te tohu whakakapinga teitei hei whakakaha mo te aihikirimi, te kai kēne, te kihu maoa tere, me te whakapumau pahuka mo te pia, me etahi atu.
8. Ko te ahumahi rongoa ka kowhiria te CMC me te potata e tika ana hei here papaa, whakangawari, me te kaiwhakarewa mo te aukati.
Te wa tuku: Noema-03-2022