Ko te hydroxypropyl methylcellulose HPMC he momo o te cellulose kore-inoic whakaranu. Kaore i rite ki te CarboxyMetyl Carxymetyl Cellulose whakaranu Eter, kaore e pa ana ki nga konganuku taumaha. Na te mea rereke o nga waahanga o te methoxyl ihirangi me nga ihirangi hydroxypropyl i roto i te hydroxypropyl me nga waahanga rereke, he iti noa iho nga waahanga o te methyxyprose. Ko te ihirangi methoxyl me 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
Ko te tikanga o te hydroxypropyl i roto i te wai hydroxypropyl wai ko te ahua o te spreylcelose cellulose he rite tonu o te whakarewa wai makariri 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 tirohanga o te otinga hydroxypropyl te otinga o te rongoa mo te 2% tohu tohu athoxypropyl m. Ko te methyl cellulose i te pāmahana kotahi ko te 55 ° C. Ko te mea he ururua i roto i te wai, kua tino pai ake. Hei tauira, ko te maakahu hydroxypropyl methylcellose (te ahua whanui 0.2 ~ 0.5mm i te 20% o te otinga o te 4% s ka taea te hoko i te wai.
yublity o te hydroxypropyl methylcellulose i roto i te whakarewa i te hydroxypropyl whakarewa i roto i te whakarewa i te whakarewa i te whakarewa i te whakarewa i te whakarewa. Mo nga hua i runga ake i te 2.1, te ahua nui o te hydroxypropyl methylcroplose kei roto i te hydroxypropyl mydroxypyl ms = 1.5, me te katoa o te whakakapinga i runga ake nei. . 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 pa ana ki te tirotiro o te hydroxypropyl methylcrosel Ko te whakatauranga a te cellloxypropyl, ka whangangahia i te 20% te otinga 2% te 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 piki te pāmahana, ka tiimata te tirohanga, engari ka tae ana ki te pāmahana,
Ka pa mai te tirohanga me te kohukohu. 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 tohu ko te methylcellulose me te pseudoxylulose, me tona otinga he pumau i te pāmahana rūma me te kore o te ngoikore o te mate.
(3) Ko te tote tote o te hydroxypropyl methylcellulose mai i te hydroxypropyl he eter i te wai-kore, hei tauira, ko te carbollymetyl cellulose e pa ana ki 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, ka tapiritia etahi o te tote. , i roto i te tono, ka taea e ia te whakatutuki i te kaha o te 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 nui o te waikawa marama, penei i te waikawa rama, 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. Ko enei pūhui polymer ko Polyethylene Glycol, polyvinyl acetate, polymetylvinylliloxane, hydroxyethyl 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 nga kowhatu o te wai-whakarewa-wai o te waikawa o te hydroxyproplose e hono ana ki a Aldehydes i runga i te mata. Ko nga Aldehydes e hanga ana i te konutai hydroxyplulose ko te momaldehyde, te adipaldehyde, adipaldehyde. kaihoko i roto i te hanga ahumahi. Ko te nui o tenei momo o te kaihoko whakawhiti-hono i roto i te otinga ko te 0.2% ~ 10% o te 7% o te 7%, hei tauira, 3.3% o Glyoxal te mea tino pai. Ko te tikanga, ko te maimoatanga
Te pāmahana ko 0 ~ 30 ℃, a ko te waa ko te 1 ~ 120min. Me whakahaere te tauhohenga whakawhiti-hono i raro i nga tikanga waikawa. Ko te tikanga, ko te otinga ka tapiritia ki te waikawa kaha o te waikawa ki te whakamahi i te pH o te otinga ki te 2 ~ 6, a ka whai kiko a Allehydes ki te kawe i te tauhohenga whakawhiti. 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 aukati i te waikawa o te hydroxyplulose kohukohu te cellulose, penei i te roopu whakakapinga, kaore i te pai ki te pangia e te microorganism, engari ko te hua oti ka nui ake te painga o te uara 1, ka kitea e nga whākōkī, ko te tohu o te whakakapinga o ia roopu i runga i te Cellulose Chain kaore i te rite ki te roopu awhiawhi, he matūkai 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 hydromelys o te whākōkī, te reanga toenga o te hydroxypllose (ds = 1.86) 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) Ko te mahinga o te hydroxypropyl kiriata kiriata hydroxypropyl methylcellulose 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. Te kaha o te kiriata me te
Ko te taapiri i te kirihou he nui ake te nui ake i te kore kirika, 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: Nov-24-2022