Pehea e ho'āʻo ai i ka viscosity o ka hydroxypropyl methylcellulose?

ʻO ka Hydroxypropyl methylcellulose no ke kūkulu ʻana e pono e pale i ka infiltration o ka wai i loko o ka pā, a ʻo ka paʻa ʻana o ka nui kūpono o ka wai i loko o ka pahu e hiki ai i ka sima ke hana i ka hana maikaʻi no ka wai a me ka wai. ʻO ka hydroxypropyl methylcellulose ka viscosity o ka cellulose i loko o ka mortar e pili pono ana, ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai o ka hydroxypropyl methylcellulose.

Ke kiʻekiʻe loa ka wai o ka hydroxypropyl methylcellulose, e emi iho ka wai o ka hydroxypropyl methylcellulose, e alakaʻi pololei ana i ka emi ʻana o ka pono hana o ka hydroxypropyl methylcellulose. Ua kamaʻāina pū mākou i nā mea maʻalahi ke hana hewa. Pono mākou e mālama hou a loaʻa iā mākou nā hopena i manaʻo ʻole ʻia.

ʻO ka viscosity ʻike ʻia he hōʻailona koʻikoʻi o ka hydroxypropyl methylcellulose. ʻO nā ʻano hoʻoholo maʻamau ʻo ia ka rotational viscometry, capillary viscometry a me ka hāʻule ʻana o ka hāʻule viscometry.

I ka wā ma mua, ʻo ke ʻano hoʻoholo o ka hydroxypropyl methylcellulose he capillary viscometry, me ka hoʻohana ʻana i kahi viscometer ubbelohde. ʻO ka mea maʻamau ka hoʻoholo hoʻoholo ʻana he ʻano wai wai o 2, a ʻo ke kumu: V=Kdt. Hōʻike ʻo V i ka viscosity, ʻo ka ʻāpana, ʻo K ka mea mau o ka viscometer, d e hōʻike ana i ka mānoanoa ma ka mahana mau, t pili i ka manawa mai luna a lalo ma o ka viscometer, ʻo ka ʻāpana ʻelua s. He paʻakikī kēia ʻano hana, a inā he mau mea hiki ʻole ke hoʻoheheʻe ʻia, maʻalahi ke hana hewa, a paʻakikī ke ʻike i ka maikaʻi o ka hydroxypropyl methylcellulose.

ʻO ka pilikia o ka delamination o ke kāpili kūkulu hale kahi pilikia nui i loaʻa e nā mea kūʻai. ʻO ka mea mua, pono e noʻonoʻo ʻia ka pilikia o nā mea maka i ka delamination o ke kāpili kūkulu. ʻO ke kumu nui o ka hoʻopau ʻana i ke kāpili kūkulu ʻana he polyvinyl alcohol (PVA) a me ka hydroxypropyl methylcellulose (HPMC). ma muli o ka launa ʻole. ʻO ka lua, no ka lawa ʻole o ka manawa hoʻouluulu; aia no hoi ka maikai ole o ka hana mānoanoa o ke kāpili kūkulu.

I ke kāpili hana, pono e hoʻohana ʻia ka hydroxypropyl methylcellulose (HPMC) koke, no ka mea, ʻo ka hydroxypropyl methylcellulose (HPMC) e hoʻopuehu wale ʻia i loko o ka wai me ka ʻole o ka hemo maoli. Ma kahi o 2 mau minuke, piʻi mālie ka viscosity o ka wai, e hana ana i kahi colloid viscous transparent.

ʻO nā huahana hoʻoheheʻe wela, ke hui ʻia me ka wai anuanu, hiki ke hoʻopuehu koke i ka wai wela a nalowale i ka wai wela. Ke hāʻule ka mahana i kekahi mahana, e ʻike mālie ʻia ka viscosity a hiki i ka hana ʻana i kahi colloid viscous transparent. ʻO ka nui i manaʻo ʻia o ka hydroxypropyl methylcellulose (HPMC) i hoʻohui ʻia i ke kāpili kūkulu hale ʻo 2-4kg.

ʻO ka Hydroxypropyl methylcellulose (HPMC) he mau waiwai kemika paʻa, kūpaʻa ka maʻi, a me ka paʻa wai maikaʻi i ke kāpili kūkulu, a ʻaʻole pili i nā loli i ka waiwai pH. Hiki ke hoʻohanaʻia me ka viscosity mai 100,000 S a 200,000 S. Akā i ka hanaʻana,ʻoi aku ka kiʻekiʻe o ka viscosity,ʻoi aku ka maikaʻi. Hoʻohālikelike ʻia ka viscosity me ka ikaika paʻa. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka liʻiliʻi o ka ikaika. ʻO ka maʻamau, kūpono ka viscosity o 100,000 S.