Pehea e hana ʻia ai ka hydroxypropyl methylcellulose?

ʻO ka Hydroxypropylmethylcellulose (HPMC) he polymer synthetic i loaʻa mai ka cellulose. Ma ke ʻano he mānoanoa, emulsifier a me stabilizer, hoʻohana nui ʻia i ka lāʻau lapaʻau, nā meaʻai a me nā ʻoihana hoʻonaninani. Hoʻohana pū ʻia ʻo HPMC i nā mea hana e like me ka cement, mortar a me ka gypsum e hoʻomaikaʻi i ka hana a me ka paʻa wai. Ma kēia ʻatikala, e kūkākūkā mākou i ka hana ʻana o HPMC a me kāna noi ma nā ʻoihana like ʻole.

Hana HPMC

Hoʻopili ʻia ʻo HPMC ma ka hana ʻana i ka cellulose me ka propylene oxide a me ka methyl chloride ma lalo o nā kūlana alkaline. ʻO ke kaʻina hana e pili ana i kēia mau ʻanuʻu:

KaʻAnuʻu Hana 1: Alkaline lapaʻau o cellulose

Hoʻohana ʻia ka cellulose me kahi hopena caustic o ka sodium hydroxide e hoʻohuli iā ia i cellulose alkaline. ʻO kēia ka hoʻomaʻamaʻa ʻana i nā pūʻulu hydroxyl o ka cellulose i ʻoi aku ka hana, e hoʻomaʻamaʻa i nā hopena ma hope.

KaʻAnuʻu Hana 2: ka pane me ka propylene oxide

I ka hana aʻe, hoʻohui ʻia ka propylene oxide i ka cellulose alkaline ma lalo o ke ʻano o ka mahana a me ke kaomi. Hoʻokō ʻia ka hopena ma ke alo o kahi catalyst e like me ka amine tertiary a i ʻole ka alkali metala hydroxide. Hoʻopili ka propylene oxide me nā hui hydroxyl o cellulose e hana i ka hydroxypropyl cellulose.

KaʻAnuʻu Hana 3: Quaternization me Methyl Chloride

ʻO ka Hydroxypropylcellulose i hoʻopaʻa ʻia me ka methyl chloride e hana i ka HPMC. Hana ʻia ka hopena ma lalo o nā kūlana alkaline, a hiki ke hoʻomalu ʻia ke degere o ka quaternization ma ka hoʻoponopono ʻana i ka nui o ka methyl chloride.

Holoi ʻia ka HPMC, kānana a hoʻomaloʻo ʻia no ka loaʻa ʻana o ka pauka keʻokeʻo, kahe manuahi. ʻO nā waiwai o ka HPMC, e like me ka viscosity, solubility, a me nā waiwai gel, hiki ke hoʻololi ʻia ma ka hoʻololi ʻana i ke degere o ka hoʻololi ʻana (DS) o nā hui hydroxypropyl a me methyl.

Noi o HPMC

Loaʻa i ka HPMC ka nui o nā noi ma nā ʻoihana like ʻole. Ua kūkākūkā ʻia kekahi mau noi kaulana ma lalo nei:

ʻoihana lāʻau lapaʻau

Hoʻohana nui ʻia ʻo HPMC i ka ʻoihana lāʻau lapaʻau ma ke ʻano he mānoanoa, hoʻopaʻa a me ke kiʻiʻoniʻoni mua. Hoʻohana ʻia ia i loko o nā papa papa e kāohi i ka hoʻokuʻu ʻana i nā lāʻau lapaʻau. Hana ʻo HPMC ma ke ʻano he mea hoʻopaʻa ma ka hoʻoomi ʻana i ka hui pauka i loko o kahi ʻano ʻano paʻa. Hoʻonui ia i ka solubility a me ka bioavailability o nā lāʻau lapaʻau maikaʻi ʻole ma o ka hoʻokumu ʻana i nā dispersion paʻa a kūlike.

ʻoihana meaʻai

Hoʻohana ʻia ʻo HPMC i ka ʻoihana meaʻai ma ke ʻano he emulsifier, thickener a stabilizer. Hoʻohana maʻamau ia i nā huahana bakena, ice cream a me nā huahana waiū. Hoʻomaikaʻi ʻo HPMC i ke ʻano a me ka paʻa ʻana o nā meaʻai ma ka pale ʻana i ka hoʻokaʻawale ʻana o nā meaʻai a me ka hoʻēmi ʻana i ka syneresis. Hoʻonui ia i ka ʻono a me ke ola o nā meaʻai.

ʻoihana hoʻonaninani

Hoʻohana ʻia ʻo HPMC i ka ʻoihana hoʻonaninani e like me ka mānoanoa a me ka emulsifier. Hoʻohana ʻia ia i nā huahana mālama ʻili a me ka lauoho e like me nā lotions, creams, shampoos a me nā conditioners. Hoʻomaikaʻi ʻo HPMC i ke ʻano a me ka paʻa o kēia mau huahana a hāʻawi i nā pono moisturizing a me ka hoʻoponopono.

ʻoihana kūkulu hale

Hoʻohana ʻia ʻo HPMC i ka ʻoihana kūkulu hale ma ke ʻano he mea hoʻohui i ka cement, mortar a me ka gypsum. Hoʻonui ia i ka hana a me ka paʻa ʻana o ka wai o kēia mau mea, ma laila e hoʻonui ai i ko lākou ikaika a paʻa. ʻO ka HPMC hoʻi e hoʻemi i ka pilikia o ka māhā a me ka emi ʻana i ka wā maloʻo.

i ka hopena

I ka hopena, ʻo HPMC kahi polymer versatile a versatile me nā noi i nā ʻoihana like ʻole. Hoʻomākaukau ʻia e ka mālama alkali o cellulose, ka hopena me ka propylene oxide, a me ka quaternization me ka methyl chloride. Hiki ke hoʻopaʻa ʻia nā waiwai o HPMC ma o ka hoʻololi ʻana i ke ʻano o ka hoʻololi ʻana. He kuleana koʻikoʻi ka HPMC i ka lāʻau lapaʻau, ka meaʻai, ka hoʻomaʻemaʻe a me nā ʻoihana hana ma o ka hoʻomaikaʻi ʻana i ke ʻano, ke kūlike a me ka hana ʻana o nā huahana like ʻole. ʻO kāna non-toxicity a me ka biocompatibility e lilo ia i mea palekana a waiwai nui i kēia mau ʻoihana.