Ko te methylcelylulose he ahua o te cellulose kore-inoic i whakaranuhia eter. Kaore i rite ki te CarboxyMetyl Carxymetyl Cellulose whakaranu Eter, kaore e pa ana ki nga konganuku taumaha. Na te mea rereke o te ihirangi methoxyl me nga tuhinga hydroxypropyl i roto i te hydroxypropyl me te iti o nga waahanga o te methoxypyl me te iti o te ihirangi methyxyl. Ko te ihirangi hydroxypropyl e tata ana ki te hydroxypropyl cellulose. Heoi, i roto i ia momo, ahakoa he iti noa iho o te roopu hydroxypropyr, he iti noa iho ranei o te ngoikore o te whakarewa i roto i te whakarewa i te papaa rauropi ranei i roto i nga rongoa o roto.
(1) Nga ngoikoretanga o te waikawa o te hydroxypropyl methylcellulose
te whakarewa o te hydroxypropyl methylcellulose i roto i te wai hydroxypropyl wai he momo rite ki te spreylcelluloluse he rite tonu nga ahuatanga o te spreylenes cellulisice me te koretake o te wai makariri. Heoi, na te roopu hydroxypropyl kua whakarerekehia, ko tona pāmahana tipu i roto i te wai wera he nui ake i te cellulose methyl. Hei tauira, ko te panui o te rongoa hydroxypropyl me te 2% o te pāmahana o te kiri ka tae atu ki te 55 ° C. Ko te mea he ururua i roto i te wai, kua tino pai ake. Hei tauira, ko te haangai hydroxypropyl methylcellulose (te ahua whanui 0.2 ~ 0.5mm i te 20% o te rekoata o te 2.
te whakarewa o te hydroxypropyl methylcellulose i roto i te whakarewa i te hydroxypropyl whakarewa i te whakarewa i te whakarewa i te whakarewa i te whakarewa i te whakarewa i te whakarewa. Ko te methylcellulose me whai i te tohu whakakapinga a Methoxyl o te 2.1 i runga ake nei, engari ko te hydroxypropyl ms = 1.5, te teitei o te hydroxypropy. te ahumoana me te whakaheke wai. He rewa ano hoki i roto i nga hydrocarbon maroke penei i te methylene chloride me te chloroform, me nga whakarewa o te rauropi penei i te actone, isopropanol me te waipiro waipiro. Ko te whakaraerae i nga whakarewa o te tipu he pai ake i te whakaheke wai.
(2) Ko nga mea e awe ana i te tirohanga o te hydroxypropyl methyl cellulose te whakatau i te karapaatanga paerewa hydroxypropyl he rite ki era atu o nga Cellulose Ether. Kei te whanganga i te 20 ° C me te 2% otinga wai hei paerewa. Ko te tirohanga o te hua kotahi ka piki ake te piki o te kukume. Mo nga hua me nga momo taumaha rereke i te taua kukupa, te hua me te taumaha o te kohuru nui ake he nui ake te tirohanga. Ko tana whanaungatanga me te pāmahana he rite ki taua cellulose methyl. Ka tae ana te pāmahana, ka tiimata te maturuturu, engari ka tae ana ki te pāmahana, ka ara ake te tirohanga me te kohutanga. He teitei ake te pāmahana o te tipu o nga hua iti-tirohanga. he tiketike. Ko tana tohu kiri e pa ana ki te tirohanga o te Eter, engari e pa ana ki te paanga whakahiato o te roopu me te roopu hydroxypropyl i roto i te eter me te rahi o te tohu whakakapinga. Me tohuhia ko te methylcelcropLolose te hsedoxyllistic, me tona otinga he pumau i te pāmahana rūma me te kore e ngoikore te tirohanga.
(3) te tote tote o te hydroxypropyl methylcellulose mai i te hydroxypropyl he eter pāpāho, kaore i rite ki te Carboxymethyl turanga, i roto i te otinga ki te urupare me nga ngota whakarewa. Ko nga tote whanui penei i te chloride, bromide, phosphate, nitrate, me era atu e kore e raru i te waa o te otinga wai. Heoi, ko te taapiri o te tote te whakaawe i te pāmahana papaku o tona otinga wai. Ka piki haere te kukume tote, ka heke te pāmahana o te kiri. I te wa e tu ana te kukume tote i raro i te wa poto, ko te matatau o te otinga ka piki ake te piki. Na reira, ko tetahi nui o te tote ka tapiritia, i roto i te tono, ka taea e ia te whakatutuki i te tino ohanga. Na reira, i etahi o nga tono, he pai ake te whakamahi i te ranunga o te cellulose eter me te tote atu i te tino kaha o te whakaotinga Eter e kaha ana.
(4) HydroxyPropyl methylcelllose o te waikawa me te waiora konupora hydroxypropyl e mau ana ki te waikawa me te alkalis, kaore i te pa ki te whānuitanga o te pH 2 ~ 12. Ka taea e ia te tu atu i tetahi waahanga o te waikawa marama, penei i te waikawa maama, te waikawa acetic, te waikawa succinic, te waikawa phosphoric, me te waikawa boric. Ko te Alkalis pēnei i te houra tiihi, kaore he wai o te waiariki me te kotakora o te wai, engari ka taea e ratou te whakanui ake i te whakamaarotanga o te otinga, a ka heke haere.
(5) Ko te pohehe o te ahorangi hydroxyplulose hydroxyprosel ka taea te whakaranu ki nga whakaurunga polymercellululose wai-wai-wai ki te waiho hei otinga me te tino marama. Kei roto i enei pūhui polyethylene Glycol, polyvinyl acetate, polyslicone, polymethylvinyl siloxane, hydroxyethyl cellouse, me te methyl cellulose, me te methyl cellulose. Ko nga pūhui kohinga nui rawa atu penei i te papaahi arabic, manch gum, mayaa gum, aha atu ano hoki te hototahi. Ka taea hoki te whakaranu i te waikawa hydroxypropyl, te waikawa pallit.
(6) Ko te cellulose-whakarewa wai-wai o te hydroxypropyl ka taea te kawe i te mata whakawhiti ki a Aldehydes, na reira ko enei waahanga wai-oneone e rere ana i roto i te otinga. Ko nga Aldehydes e hanga ana i te waikawa hydroxyplulose ko te momaldehyde, te adipaldehyde, me te utu mo te flyoxal. Te whakaputa. Ko te inenga o tenei momo o te kaihoko-hono i roto i te otinga ko te 0.2% ~ 10% o te 7% ~ 10%, hei tauira. Ko te tikanga, ko te pāmahana maimoatanga he 0 ~ 30 ℃, a ko te waa ko te 1 ~ 120min. Me kawe te tauhohenga whakawhiti i raro i nga tikanga waikawa. Ko te tikanga, ko te pH o te otinga ka whakatikahia ki te 2 ~ 6 ma te taapiri i te waikawa kaha o te waro ki te otinga, ka pai ake te aldehydes ki te kawe i te tauhohenga Ko te waikawa hydrochloric he waikawa hydrochloric, waikawa sulfuric, waikawa phosphoric, waikawa hakihaki, waikawa succinic ranei etc. Ka taea hoki te taapiri i te waikawa me te aldehyde i te wa ano ka taea te tuku i te otinga kia uru ki te tauhohenga whakawhiti-hono i roto i te waahanga pH e hiahiatia ana. Ko tenei tauhohenga e whakamahia ana i roto i te tukanga maimoatanga whakamutunga i roto i te tukanga whakarite i te Cellulose Ethes. I muri i te koretake o te Eter Cellulose, he waatea te whakamahi.
20 ~ 25 ℃ wai hei horoi me te pure. Ka whakamahia te hua, ka taea te taapiri i nga matū konutai ki te otinga o te hua hei whakatika i te pH o te otinga kia tere te rewa. Ko tenei tikanga e pa ana ki te maimoatanga o te kiriata i muri i te otinga o te pūtau pūtau ka hangaia hei kiriata hei kiriata kore.
(7) Ko te tuukino o te hydroxypropyl methylcellose he rite ki nga roopu ahuru, mena he mea tino nui te hua o te ranunga whakakapinga. Ko ia roopu i runga i te mekameka cellulose kaore i te riterite, ka taea e nga microorganism te kore e taea te whakamahi i te roopu anhydroglucose ki te hanga i nga huka, hei matūriki mo nga microorganism hei tango. Na, ki te mea ka piki ake te tohu o te whakakapinga tuuturu o te cellulose, te ātete ki te horopaki o te cellulose onher ka piki ake. E ai ki nga ripoata, i raro i nga tikanga e whakahaerehia ana, ko nga hua hydrolycely o te hydroxypropy (ds = 1.66) ko te 3.8%, me te hydroxyethyl cellulose 1.7%. Ka taea te kite ko te atyldroxypropyl methylcellose he kaha anti-whākōkī. Na reira, ko te aukati tino pai o te hydroxypropyl methylcellulose, he mea whakakotahi me nga taonga-a-tinana, e whakamahia ana i roto i nga koti-emulsion. Heoi, mo te rokiroki mo te wa roa o te otinga, i te paitini ranei mai i waho, ka taea te taapiri i te tiakitanga hei whakatikatika, me te kowhiringa kia rite ki nga whakaritenga whakamutunga o te otinga. Ko te Phenylmercuric Acetate me te Manganese fluoroticate whai hua, engari he ngoikore, me whai whakaaro ki te mahi. Ko te tikanga, 1 ~ 5mg o Phenylmercury Acetate Ka taea te taapiri atu ki te otinga mo ia rita o te inenga.
(8) Te Mahi o te hydroxypropyl kiriata wai hydroxypropyl methylcelfllolose he pai rawa atu te ahua o te kiriata. Ko tana otinga wai, ko te otinga whakarewa raupapa ranei ka pania ki te pereti karaihe, ka kore noa iho ka maarama i muri i te maroke. Me te kiriata uaua. He pai te ātete o te makuku ka mau tonu ki te pāmahana tiketike. Mena ka tapiritia te kirihou hygroscopic, ka taea te whakapai ake i tana waatea me te ngawari. I runga i nga waahanga o te whakapai ake i te ngawari, ko te kirihou penei i te Glycerin me te Sorbriel te mea tino pai. Ko te tikanga, ko te kukume otinga ko te 2% ~ 3%, me te nui o te kirihou he 10% ~ 20% o te cellulose eter. Mena he tiketike rawa te kiko o te kirihou, ka puta ake te heke o te koriri o te koriri. Ko te kaha o te kiriata me te kiritora he nui ake i te kore he kirihou, ka piki ake te pikinga o te moni taapiri. Mo te hygrosscopicity o te kiriata, ka piki ake hoki te nui o te nui o te kirihou.
Te wa tuku: Jun-13-2023