Me pehea te whakatau i te kounga o te Hydroxypropyl Methyl Cellulose HPMC?

(1). Te rereketanga i waenga i te hydroxypropyl methylcellulose (HPMC) me te hydroxypropyl methylcellulose (HPMC) parakore.
1. Te ahua: Ko te HPMC hydroxypropyl methylcellulose parakore he ahua pupuhi, he iti te kiato rahi, mai i te 0.3-0.4g/ml; He pai ake te rere o te HPMC hydroxypropyl methylcellulose HPMC me te kaha ake te taumaha, a he rerekee te ahua mai i te hua pono.
2. Te Tūnga: Ko te paura HPMC hydroxypropyl methylcellulose parakore he kiriu i raro i te karu whakaata, i te karaihe whakanui ranei; i te mea ko te HPMC hydroxypropyl methylcellulose kua pokea ka kitea hei totoka kowhatu, he tioata ranei i raro i te karuiti, i te karaihe whakanui ranei.

3. Te kakara: Ko te HPMC hydroxypropyl methylcellulose parakore e kore e taea te hongi i te haunga o te haukini, te maaka me te waipiro; ka hongi te HPMC hydroxypropyl methylcellulose HPMC i nga momo kakara katoa, ahakoa he kore reka, ka taumaha.
4. Wairewa wai: hydroxypropyl methylcellulose HPMC wairewa parakore he maamaa, he maamaa te whakawhiti marama, te reeti pupuri wai ≥ 97%; Ko te wairewa wai wairewa HPMC kua poke, he uaua ki te eke ki te 80%.

(2), te pupuri wai o te hydroxypropyl methylcellulose HPMC, ka wehewehe i nga painga me nga huakore:

Ko te pupuri i te wai o te methyl cellulose ether i raro i nga tikanga pāmahana teitei he tohu nui hei tohu i te kounga o te methyl cellulose ether. Ko nga mea penei i te mahana o te hau, te pāmahana me te tere o te pehanga hau ka pa ki te tere o te whakaheke o te wai i roto i te kumete ciment me nga hua mai i te gypsum. No reira, i nga wa rerekee, he rerekee te paanga o te pupuri wai o nga hua he rite te nui o te HPMC kua tapiritia. I roto i te hanga motuhake, ka taea te whakatika i te paanga o te pupuri wai o te slurry ma te whakanui ake, te whakaheke ranei i te nui o te HPMC kua tapiritia. Ka taea e nga hua HPMC hydroxypropyl methylcellulose pai te whakaoti i te raruraru o te pupuri wai i raro i te wera nui.

Ko te methylcellulose-kounga teitei ka taea te rite me te whai hua te marara i roto i te kumete ciment me nga hua e pa ana ki te gypsum, ka takai i nga matūriki totoka katoa, ka hanga he kiriata makuku, ka tukuna te makuku i roto i te turanga mo te wa roa, me te parakore Ko te tauhohenga wai. o te rauemi gelled whakarite te kaha here me te kaha kōpeketanga o te rauemi. Ko te kounga teitei o te hydroxypropyl methylcellulose HPMC, he tino pai tona rite, ko ona roopu methoxy me te hydroxypropoxy kua tohaina ki te taha o te mekameka ngota cellulose, ka taea te whakanui ake i te hāora i runga i nga hononga hydroxyl me te ether Te kaha o nga ngota ki te hono ki te wai hei hanga i nga here hauwai. ka huri i te wai kore utu ki te wai herea, na reira ka whai hua te whakahaere i te whakaetonga wai na te nui o te wera o te rangi me te pupuri i te wai teitei.
Na reira, i roto i te hanga o te raumati wera nui, ki te whakatutuki i te paanga o te pupuri wai, he mea tika ki te taapiri i nga hua HPMC kounga teitei i roto i nga rahinga e rite ana ki te tauira, ki te kore, ka iti rawa te whakamakuku, ka iti te kaha, te pakaru, te pupuhi. me te whakaheke na te nui o te whakamaroke. raruraru, engari ka piki ake ano te uaua o te hanga o nga kaimahi. I te hekenga o te pāmahana, ka taea te whakaheke haere te nui o te wai kua tapirihia e te HPMC, a ka taea ano te pupuri i te wai.

(3) Te whakakore o te hydroxypropyl methylcellulose HPMC

I roto i te ahumahi hanga,hydroxypropyl methylcellulose HPMChe maha nga wa ka maka ki roto i te wai kore, a ka memeha noa te hua HPMC hei whakatau i te reiti rewa. I muri i te tuunga ki roto i te wai kore noa, ko te hua ka tere ka piri me te kore marara he hua kaore he maimoatanga mata; i muri i te tuunga ki roto i te wai kore noa, ko te hua ka marara me te kore e piri tahi he hua me te maimoatanga mata. Ka rewa anake te HPMC hydroxypropyl methylcellulose HPMC kaore i mahia, ka tere te rewa o tana matūriki kotahi, ka tere te hanga i te kiriata, ka kore te wai e uru atu ki etahi atu matūriki, ka puta ko te agglomeration me te agglomeration, e kiia nei i tenei wa ko te whakakorenga puhoi i roto i te hua o te maakete.

Matūriki hua HPMC hydroxypropyl methylcellulose mata-tukinotia, i roto i te wai kūpapa, ka taea te marara takitahi matūriki kahore agglomeration, engari e kore e te pokey hua tonu. I muri i te whakamakuku mo etahi wa, ka pakaru te hanganga matū o te maimoatanga mata, a ka taea e te wai te whakakore i nga matūriki HPMC. I tenei wa, kua tino marara nga matūriki hua me te nui o te wai, no reira karekau te hua e whakahiato, ka whakahiato ranei i muri i te whakakorenga. Ko te tere o te marara me te tere o te whakakorenga ka whakawhirinaki ki te tohu o te maimoatanga mata. Mena he iti te maimoatanga o te mata, he puhoi te tere marara me te tere o te piri; ko te hua ki te maimoatanga mata hohonu he tere marara me te puhoi te tere piri. Mena kei te pirangi koe kia tere te memeha o enei hua i roto i tenei ahuatanga, ka taea e koe te whakaheke i te iti o nga matū kawakore ina rewa ana anake. Ko te maakete o naianei e kiia ana ko nga hua inamata. Ko nga ahuatanga o nga hua HPMC kua tukinotia i te mata ko: i roto i te wairewa wai, ka marara nga matūriki tetahi ki tetahi, ka tere te rewa i roto i te ahua kawakore, ka memeha haere i roto i te ahua kore me te waikawa.

Ko nga ahuatanga o te HPMC hydroxypropyl methylcellulose kaore i rongoa he: he tere te rewa o te matūriki kotahi i roto i te waikawa, te kawakore, me te noho koretake, engari kaore e taea te marara i waenga i nga matūriki i roto i te wai, ka hua ki te kohinga me te agglomeration. I roto i te mahi tonu, i muri i te marara tinana o tenei raupapa o nga hua me nga matūriki totoka penei i te paura rapa, te ciment, te onepu, me etahi atu, he tino tere te tere o te whakakore, a, kaore he awheawhe, he agglomeration ranei. I te wa e tika ana kia whakakorehia nga hua HPMC motuhake, me whakamahi ma te tupato tenei raupapa o nga hua, na te mea ka whakahiato, ka mau tonu. Mena e tika ana kia whakakorehia te hua o te HPMC hydroxypropyl methylcellulose kore-mata-mata, me marara ki te wai wera 95°C, ka whakamatao kia memeha.

I roto i nga mahi whakangao, ka memeha noa tenei raupapa hua i muri i te marara me etahi atu matūriki matūriki totoka i raro i nga tikanga kawakore, karekau he rerekee te tere o te rewa mai i nga hua kaore i rongoatia. He pai hoki mo te whakamahi i nga hua ka memeha noa, kaore he kaka, he kapia ranei. Ko te tauira motuhake o te hua ka taea te kowhiri i runga i te tere o te whakakorenga e hiahiatia ana e te hanga.
I te wa o te hanga, ahakoa he kumete ciment, he gypsum-based slurry ranei, he punaha alkaline te nuinga o aua mea, a he iti rawa te nui o te HPMC kua tapirihia, ka taea te marara i roto i enei matūriki. Ina tapirihia te wai, ka tere te memeha a HPMC.