Ka ʻike ʻana i ka maikaʻi o ka Hydroxypropyl Methyl Cellulose

ʻekahi. ʻO ka ʻokoʻa ma waena o ka hoʻopili ʻiahydroxypropyl methylcellulose (HPMC)a me ka hydroxypropyl methylcellulose maʻemaʻe (HPMC)
1. ʻAno: He palupalu ke ʻano o ka hydroxypropyl methylcellulose HPMC maʻemaʻe a he haʻahaʻa ka nui o ka nui, mai 0.3-0.4g/ml; ʻoi aku ka maikaʻi o ka wai o ka hydroxypropyl methylcellulose HPMC i hoʻopili ʻia a ʻoi aku ke kaumaha, a he ʻokoʻa nui ke ʻano mai ka huahana maoli.

2. Kūlana: He fibrous ka pauka hydroxypropyl methylcellulose HPMC maʻemaʻe ma lalo o kahi microscope a i ʻole ke aniani hoʻonui; ʻoiai hiki ke ʻike ʻia ka hydroxypropyl methylcellulose HPMC i hoʻohuihui ʻia ma ke ʻano he mau mea paʻa granular a i ʻole nā ​​​​kristal ma lalo o kahi microscope a i ʻole ke aniani hoʻonui.

3. ʻAla: ʻAʻole hiki i ka hydroxypropyl methylcellulose HPMC maʻemaʻe ke honi i ke ʻala o ka ammonia, starch a me ka waiʻona; hiki i ka hydroxypropyl methylcellulose HPMC i hoʻohuihui ʻia ke honi i nā ʻano ʻala like ʻole, ʻoiai inā he ʻono ʻole, e kaumaha ia.

4. Hoʻonā wai: ʻo ka hoʻonā wai hydroxypropyl methylcellulose HPMC maʻemaʻe he moakāka, kiʻekiʻe ka hoʻoili ʻana i ka mālamalama, ʻoi aku ka nui o ka paʻa wai ≥ 97%; ʻo ka hoʻonā wai hydroxypropyl methylcellulose HPMC i hoʻohuihui ʻia he turbid, a paʻakikī ke hiki i ka 80% o ka paʻa wai.

ʻO ka lua, ʻo ka paʻa ʻana o ka wai o ka hydroxypropyl methylcellulose HPMC, e hoʻokaʻawale i nā pono a me nā hemahema:
ʻO ka paʻa ʻana o ka wai o ka methyl cellulose ether ma lalo o nā kūlana wela kiʻekiʻe he hōʻailona koʻikoʻi ia e hoʻokaʻawale i ka maikaʻi o ka methyl cellulose ether. ʻO nā mea e like me ka mahana o ka ea, ka mahana a me ka wikiwiki o ke kaomi makani e hoʻopilikia i ka nui o ka volatilization o ka wai i loko o ka sima sima a me nā huahana gypsum. No laila, i nā kau like ʻole, aia kekahi mau ʻokoʻa i ka hopena paʻa wai o nā huahana me ka nui like o ka HPMC i hoʻohui ʻia. I ke kūkulu kikoʻī, hiki ke hoʻoponopono ʻia ka hopena paʻa wai o ka slurry ma ka hoʻonui ʻana a i ʻole ka hoʻemi ʻana i ka nui o ka HPMC i hoʻohui ʻia. Hiki i nā huahana hydroxypropyl methylcellulose HPMC maikaʻi loa ke hoʻoponopono pono i ka pilikia o ka paʻa wai ma lalo o ka mahana kiʻekiʻe.

Hiki ke hoʻopuehu like ʻia ka methylcellulose kiʻekiʻe i loko o ka sima sima a me nā huahana gypsum, a kāʻei i nā ʻāpana paʻa a pau, a hana i kahi ʻili pulu, e hoʻokuʻu mālie ʻia ka makū i loko o ke kumu no ka manawa lōʻihi, a ʻo ka inorganic ʻO ka hopena hydration o ka mea gelled e hōʻoiaʻiʻo i ka ikaika o ka hoʻopaʻa a me ka ikaika compressive o ka mea. ʻO ka hydroxypropyl methylcellulose HPMC kiʻekiʻe, he maikaʻi loa kona ʻano like, ua hoʻolaha like ʻia kona mau hui methoxy a me hydroxypropoxy ma ke kaulahao molekala cellulose, hiki iā ia ke hoʻonui i ka oxygen ma nā pilina hydroxyl a me ether. ʻO ka hiki i nā ʻātoma ke hui pū me ka wai e hana i nā pilina hydrogen e hoʻohuli i ka wai manuahi i loko o ka wai i hoʻopaʻa ʻia, no laila e kāohi pono ana i ka mahu wai i hoʻokumu ʻia e ke aniau wela kiʻekiʻe a hoʻokō i ka paʻa wai kiʻekiʻe.

No laila, i ke kūkulu ʻana i ke kauwela wela kiʻekiʻe, i mea e hoʻokō ai i ka hopena paʻa wai, pono e hoʻohui i nā huahana HPMC kiʻekiʻe i nā nui lawa e like me ke ʻano, a i ʻole, ʻaʻole lawa ka hydration, hoʻemi ʻia ka ikaika, nā māwae, nā lua a me ka hoʻokahe ʻana i hoʻokumu ʻia e ka maloʻo nui. nā pilikia, akā e hoʻonui pū i ka paʻakikī o ke kūkulu ʻana o nā limahana. I ka emi ʻana o ka mahana, hiki ke hoʻemi mālie ʻia ka nui o ka wai i hoʻohui ʻia e HPMC, a hiki ke hoʻokō ʻia ka hopena paʻa wai like.

3. Ka hoʻoheheʻe ʻana o ka hydroxypropyl methylcellulose HPMC
I loko o ka ʻoihana kūkulu hale, hoʻokomo pinepine ʻia ka hydroxypropyl methylcellulose HPMC i loko o ka wai kūlike, a hoʻoheheʻe wale ʻia ka huahana HPMC e hoʻoholo i ka helu hoʻoheheʻe. Ma hope o ke kau ʻia ʻana i loko o ka wai kūlike wale nō, ʻo ka huahana e hui koke me ka ʻole o ka hoʻopuehu ʻana he huahana me ka ʻole o ka mālama ʻana i ka ʻili; ma hope o ke kau ʻia ʻana i loko o ka wai kūlike wale nō, ʻo ka huahana hiki ke hoʻopuehu a ʻaʻole e hui pū he huahana me ka mālama ʻana i ka ʻili. Ke hoʻoheheʻe wale ʻia ka hydroxypropyl methylcellulose HPMC i mālama ʻole ʻia i ka ʻili, hoʻoheheʻe koke kāna ʻāpana hoʻokahi a hana koke i kahi kiʻiʻoniʻoni, e hoʻoulu ai i ka wai e komo hou i nā ʻāpana ʻē aʻe, e hopena ana i ka agglomeration a me ka agglomeration, i kapa ʻia i kēia manawa he hoʻoheheʻe lohi ma ka huahana mākeke.

ʻO nā ʻāpana huahana HPMC hydroxypropyl methylcellulose i mālama ʻia ma ka ʻili, i loko o ka wai kūlike, hiki ke hoʻopuehu ʻia nā ʻāpana pākahi me ka ʻole o ka hoʻohuihui ʻana, akā ʻaʻole koke ka mānoanoa o ka huahana. Ma hope o ka hoʻomoʻa ʻana no kekahi manawa, ua luku ʻia ke ʻano kemika o ka mālama ʻana ma ka ʻili, a hiki i ka wai ke hoʻoheheʻe i nā ʻāpana HPMC. I kēia manawa, ua hoʻopuehu piha ʻia nā ʻāpana huahana a ua omo ʻia ka wai lawa, no laila ʻaʻole e hoʻohuihui a hoʻohuihui paha ka huahana ma hope o ka hoʻoheheʻe ʻana. Pili ka wikiwiki o ka hoʻopuehu ʻana a me ka wikiwiki o ka hoʻoheheʻe ʻana i ke kiʻekiʻe o ka mālama ʻana ma ka ʻili. Inā he liʻiliʻi ka mālama ʻana ma ka ʻili, ua lohi iki ka wikiwiki o ka hoʻopuehu ʻana a wikiwiki ka wikiwiki o ka hoʻopili ʻana; ʻoiai ʻo ka huahana me ka mālama ʻana ma ka ʻili hohonu he wikiwiki ka hoʻopuehu ʻana a me ka wikiwiki o ka hoʻopili ʻana. Inā makemake ʻoe e hoʻoheheʻe koke kēia moʻo o nā huahana i kēia mokuʻāina, hiki iā ʻoe ke hāʻule i kahi liʻiliʻi o nā mea alkaline ke hoʻoheheʻe wale ʻia. ʻO ka mākeke o kēia manawa i kapa ʻia he mau huahana koke. ʻO nā ʻano o nā huahana HPMC i mālama ʻia ma ka ʻili: i loko o ka hopena wai, hiki i nā ʻāpana ke hoʻopuehu me kekahi i kekahi, hiki ke hoʻoheheʻe koke i ke kūlana alkaline, a hoʻoheheʻe mālie i ke kūlana neutral a me ka acidic.

ʻO nā ʻano o ka hydroxypropyl methylcellulose HPMC i mālama ʻole ʻia: hoʻoheheʻe koke kahi ʻāpana hoʻokahi i nā kūlana acidic, alkaline, a me ke kūlike ʻole, akā ʻaʻole hiki ke hoʻopuehu ma waena o nā ʻāpana i loko o ka wai, e hopena ana i ka hui ʻana a me ka hoʻopili ʻana. I ka hana maoli, ma hope o ka hoʻopuehu kino ʻana o kēia moʻo o nā huahana a me nā ʻāpana paʻa e like me ka pauka rubber, sima, one, a pēlā aku, wikiwiki loa ka wikiwiki o ka hoʻoheheʻe ʻana, a ʻaʻohe hoʻopili ʻana a i ʻole ka hoʻopili ʻana. I ka wā e pono ai ke hoʻoheheʻe ʻokoʻa i nā huahana HPMC, pono e hoʻohana ʻia kēia moʻo o nā huahana me ke akahele, no ka mea e hoʻopili a paʻa pū. Inā pono e hoʻoheheʻe ʻokoʻa i ka huahana hydroxypropyl methylcellulose HPMC i mālama ʻole ʻia ma ka ʻili, pono e hoʻopuehu like ʻia me ka wai wela 95°C, a laila hoʻomaʻalili ʻia e hoʻoheheʻe.

I ka hana hana maoli, hoʻoheheʻe pinepine ʻia kēia moʻo o nā huahana ma hope o ka hoʻopuehu ʻia ʻana me nā mea ʻāpana paʻa ʻē aʻe ma lalo o nā kūlana alkaline, a ʻaʻole ʻokoʻa kona helu hoʻoheheʻe ʻana mai nā huahana i mālama ʻole ʻia. He kūpono hoʻi ia no ka hoʻohana ʻana i nā huahana i hoʻoheheʻe wale ʻia, me ka ʻole o ka caking a i ʻole nā ​​​​puʻupuʻu. Hiki ke koho ʻia ke kumu hoʻohālike kikoʻī o ka huahana e like me ka helu hoʻoheheʻe e pono ai e ke kūkulu ʻana.

I ke kaʻina hana kūkulu ʻana, inā he sima sima a i ʻole ka slurry gypsum-based, ʻo ka hapa nui o lākou he mau ʻōnaehana alkaline, a ʻo ka nui o ka HPMC i hoʻohui ʻia he liʻiliʻi loa ia, hiki ke hoʻopuehu like ʻia ma waena o kēia mau ʻāpana. Ke hoʻohui ʻia ka wai,HPMCe hoʻoheheʻe koke ʻia.